vendor update

This commit is contained in:
Alexey Kostin 2021-01-10 16:42:39 +03:00
parent 7e57318c2e
commit 4002b2ad4e
25 changed files with 5049 additions and 0 deletions

44
vendor/github.com/jessevdk/go-flags/.travis.yml generated vendored Normal file
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language: go
os:
- linux
- osx
go:
- 1.x
- 1.7.x
- 1.8.x
- 1.9.x
- 1.10.x
install:
# go-flags
- go get -d -v ./...
- go build -v ./...
# linting
- go get github.com/golang/lint/golint
# code coverage
- go get golang.org/x/tools/cmd/cover
- go get github.com/onsi/ginkgo/ginkgo
- go get github.com/modocache/gover
- if [ "$TRAVIS_SECURE_ENV_VARS" = "true" ]; then go get github.com/mattn/goveralls; fi
script:
# go-flags
- $(exit $(gofmt -l . | wc -l))
- go test -v ./...
# linting
- go tool vet -all=true -v=true . || true
- $(go env GOPATH | awk 'BEGIN{FS=":"} {print $1}')/bin/golint ./...
# code coverage
- $(go env GOPATH | awk 'BEGIN{FS=":"} {print $1}')/bin/ginkgo -r -cover
- $(go env GOPATH | awk 'BEGIN{FS=":"} {print $1}')/bin/gover
- if [ "$TRAVIS_SECURE_ENV_VARS" = "true" ]; then $(go env GOPATH | awk 'BEGIN{FS=":"} {print $1}')/bin/goveralls -coverprofile=gover.coverprofile -service=travis-ci -repotoken $COVERALLS_TOKEN; fi
env:
# coveralls.io
secure: "RCYbiB4P0RjQRIoUx/vG/AjP3mmYCbzOmr86DCww1Z88yNcy3hYr3Cq8rpPtYU5v0g7wTpu4adaKIcqRE9xknYGbqj3YWZiCoBP1/n4Z+9sHW3Dsd9D/GRGeHUus0laJUGARjWoCTvoEtOgTdGQDoX7mH+pUUY0FBltNYUdOiiU="

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vendor/github.com/jessevdk/go-flags/LICENSE generated vendored Normal file
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Copyright (c) 2012 Jesse van den Kieboom. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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vendor/github.com/jessevdk/go-flags/README.md generated vendored Normal file
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go-flags: a go library for parsing command line arguments
=========================================================
[![GoDoc](https://godoc.org/github.com/jessevdk/go-flags?status.png)](https://godoc.org/github.com/jessevdk/go-flags) [![Build Status](https://travis-ci.org/jessevdk/go-flags.svg?branch=master)](https://travis-ci.org/jessevdk/go-flags) [![Coverage Status](https://img.shields.io/coveralls/jessevdk/go-flags.svg)](https://coveralls.io/r/jessevdk/go-flags?branch=master)
This library provides similar functionality to the builtin flag library of
go, but provides much more functionality and nicer formatting. From the
documentation:
Package flags provides an extensive command line option parser.
The flags package is similar in functionality to the go builtin flag package
but provides more options and uses reflection to provide a convenient and
succinct way of specifying command line options.
Supported features:
* Options with short names (-v)
* Options with long names (--verbose)
* Options with and without arguments (bool v.s. other type)
* Options with optional arguments and default values
* Multiple option groups each containing a set of options
* Generate and print well-formatted help message
* Passing remaining command line arguments after -- (optional)
* Ignoring unknown command line options (optional)
* Supports -I/usr/include -I=/usr/include -I /usr/include option argument specification
* Supports multiple short options -aux
* Supports all primitive go types (string, int{8..64}, uint{8..64}, float)
* Supports same option multiple times (can store in slice or last option counts)
* Supports maps
* Supports function callbacks
* Supports namespaces for (nested) option groups
The flags package uses structs, reflection and struct field tags
to allow users to specify command line options. This results in very simple
and concise specification of your application options. For example:
```go
type Options struct {
Verbose []bool `short:"v" long:"verbose" description:"Show verbose debug information"`
}
```
This specifies one option with a short name -v and a long name --verbose.
When either -v or --verbose is found on the command line, a 'true' value
will be appended to the Verbose field. e.g. when specifying -vvv, the
resulting value of Verbose will be {[true, true, true]}.
Example:
--------
```go
var opts struct {
// Slice of bool will append 'true' each time the option
// is encountered (can be set multiple times, like -vvv)
Verbose []bool `short:"v" long:"verbose" description:"Show verbose debug information"`
// Example of automatic marshalling to desired type (uint)
Offset uint `long:"offset" description:"Offset"`
// Example of a callback, called each time the option is found.
Call func(string) `short:"c" description:"Call phone number"`
// Example of a required flag
Name string `short:"n" long:"name" description:"A name" required:"true"`
// Example of a value name
File string `short:"f" long:"file" description:"A file" value-name:"FILE"`
// Example of a pointer
Ptr *int `short:"p" description:"A pointer to an integer"`
// Example of a slice of strings
StringSlice []string `short:"s" description:"A slice of strings"`
// Example of a slice of pointers
PtrSlice []*string `long:"ptrslice" description:"A slice of pointers to string"`
// Example of a map
IntMap map[string]int `long:"intmap" description:"A map from string to int"`
}
// Callback which will invoke callto:<argument> to call a number.
// Note that this works just on OS X (and probably only with
// Skype) but it shows the idea.
opts.Call = func(num string) {
cmd := exec.Command("open", "callto:"+num)
cmd.Start()
cmd.Process.Release()
}
// Make some fake arguments to parse.
args := []string{
"-vv",
"--offset=5",
"-n", "Me",
"-p", "3",
"-s", "hello",
"-s", "world",
"--ptrslice", "hello",
"--ptrslice", "world",
"--intmap", "a:1",
"--intmap", "b:5",
"arg1",
"arg2",
"arg3",
}
// Parse flags from `args'. Note that here we use flags.ParseArgs for
// the sake of making a working example. Normally, you would simply use
// flags.Parse(&opts) which uses os.Args
args, err := flags.ParseArgs(&opts, args)
if err != nil {
panic(err)
}
fmt.Printf("Verbosity: %v\n", opts.Verbose)
fmt.Printf("Offset: %d\n", opts.Offset)
fmt.Printf("Name: %s\n", opts.Name)
fmt.Printf("Ptr: %d\n", *opts.Ptr)
fmt.Printf("StringSlice: %v\n", opts.StringSlice)
fmt.Printf("PtrSlice: [%v %v]\n", *opts.PtrSlice[0], *opts.PtrSlice[1])
fmt.Printf("IntMap: [a:%v b:%v]\n", opts.IntMap["a"], opts.IntMap["b"])
fmt.Printf("Remaining args: %s\n", strings.Join(args, " "))
// Output: Verbosity: [true true]
// Offset: 5
// Name: Me
// Ptr: 3
// StringSlice: [hello world]
// PtrSlice: [hello world]
// IntMap: [a:1 b:5]
// Remaining args: arg1 arg2 arg3
```
More information can be found in the godocs: <http://godoc.org/github.com/jessevdk/go-flags>

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vendor/github.com/jessevdk/go-flags/arg.go generated vendored Normal file
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package flags
import (
"reflect"
)
// Arg represents a positional argument on the command line.
type Arg struct {
// The name of the positional argument (used in the help)
Name string
// A description of the positional argument (used in the help)
Description string
// The minimal number of required positional arguments
Required int
// The maximum number of required positional arguments
RequiredMaximum int
value reflect.Value
tag multiTag
}
func (a *Arg) isRemaining() bool {
return a.value.Type().Kind() == reflect.Slice
}

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#!/bin/bash
set -e
echo '# linux arm7'
GOARM=7 GOARCH=arm GOOS=linux go build
echo '# linux arm5'
GOARM=5 GOARCH=arm GOOS=linux go build
echo '# windows 386'
GOARCH=386 GOOS=windows go build
echo '# windows amd64'
GOARCH=amd64 GOOS=windows go build
echo '# darwin'
GOARCH=amd64 GOOS=darwin go build
echo '# freebsd'
GOARCH=amd64 GOOS=freebsd go build

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vendor/github.com/jessevdk/go-flags/closest.go generated vendored Normal file
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package flags
func levenshtein(s string, t string) int {
if len(s) == 0 {
return len(t)
}
if len(t) == 0 {
return len(s)
}
dists := make([][]int, len(s)+1)
for i := range dists {
dists[i] = make([]int, len(t)+1)
dists[i][0] = i
}
for j := range t {
dists[0][j] = j
}
for i, sc := range s {
for j, tc := range t {
if sc == tc {
dists[i+1][j+1] = dists[i][j]
} else {
dists[i+1][j+1] = dists[i][j] + 1
if dists[i+1][j] < dists[i+1][j+1] {
dists[i+1][j+1] = dists[i+1][j] + 1
}
if dists[i][j+1] < dists[i+1][j+1] {
dists[i+1][j+1] = dists[i][j+1] + 1
}
}
}
}
return dists[len(s)][len(t)]
}
func closestChoice(cmd string, choices []string) (string, int) {
if len(choices) == 0 {
return "", 0
}
mincmd := -1
mindist := -1
for i, c := range choices {
l := levenshtein(cmd, c)
if mincmd < 0 || l < mindist {
mindist = l
mincmd = i
}
}
return choices[mincmd], mindist
}

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vendor/github.com/jessevdk/go-flags/command.go generated vendored Normal file
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package flags
import (
"reflect"
"sort"
"strconv"
"strings"
)
// Command represents an application command. Commands can be added to the
// parser (which itself is a command) and are selected/executed when its name
// is specified on the command line. The Command type embeds a Group and
// therefore also carries a set of command specific options.
type Command struct {
// Embedded, see Group for more information
*Group
// The name by which the command can be invoked
Name string
// The active sub command (set by parsing) or nil
Active *Command
// Whether subcommands are optional
SubcommandsOptional bool
// Aliases for the command
Aliases []string
// Whether positional arguments are required
ArgsRequired bool
commands []*Command
hasBuiltinHelpGroup bool
args []*Arg
}
// Commander is an interface which can be implemented by any command added in
// the options. When implemented, the Execute method will be called for the last
// specified (sub)command providing the remaining command line arguments.
type Commander interface {
// Execute will be called for the last active (sub)command. The
// args argument contains the remaining command line arguments. The
// error that Execute returns will be eventually passed out of the
// Parse method of the Parser.
Execute(args []string) error
}
// Usage is an interface which can be implemented to show a custom usage string
// in the help message shown for a command.
type Usage interface {
// Usage is called for commands to allow customized printing of command
// usage in the generated help message.
Usage() string
}
type lookup struct {
shortNames map[string]*Option
longNames map[string]*Option
commands map[string]*Command
}
// AddCommand adds a new command to the parser with the given name and data. The
// data needs to be a pointer to a struct from which the fields indicate which
// options are in the command. The provided data can implement the Command and
// Usage interfaces.
func (c *Command) AddCommand(command string, shortDescription string, longDescription string, data interface{}) (*Command, error) {
cmd := newCommand(command, shortDescription, longDescription, data)
cmd.parent = c
if err := cmd.scan(); err != nil {
return nil, err
}
c.commands = append(c.commands, cmd)
return cmd, nil
}
// AddGroup adds a new group to the command with the given name and data. The
// data needs to be a pointer to a struct from which the fields indicate which
// options are in the group.
func (c *Command) AddGroup(shortDescription string, longDescription string, data interface{}) (*Group, error) {
group := newGroup(shortDescription, longDescription, data)
group.parent = c
if err := group.scanType(c.scanSubcommandHandler(group)); err != nil {
return nil, err
}
c.groups = append(c.groups, group)
return group, nil
}
// Commands returns a list of subcommands of this command.
func (c *Command) Commands() []*Command {
return c.commands
}
// Find locates the subcommand with the given name and returns it. If no such
// command can be found Find will return nil.
func (c *Command) Find(name string) *Command {
for _, cc := range c.commands {
if cc.match(name) {
return cc
}
}
return nil
}
// FindOptionByLongName finds an option that is part of the command, or any of
// its parent commands, by matching its long name (including the option
// namespace).
func (c *Command) FindOptionByLongName(longName string) (option *Option) {
for option == nil && c != nil {
option = c.Group.FindOptionByLongName(longName)
c, _ = c.parent.(*Command)
}
return option
}
// FindOptionByShortName finds an option that is part of the command, or any of
// its parent commands, by matching its long name (including the option
// namespace).
func (c *Command) FindOptionByShortName(shortName rune) (option *Option) {
for option == nil && c != nil {
option = c.Group.FindOptionByShortName(shortName)
c, _ = c.parent.(*Command)
}
return option
}
// Args returns a list of positional arguments associated with this command.
func (c *Command) Args() []*Arg {
ret := make([]*Arg, len(c.args))
copy(ret, c.args)
return ret
}
func newCommand(name string, shortDescription string, longDescription string, data interface{}) *Command {
return &Command{
Group: newGroup(shortDescription, longDescription, data),
Name: name,
}
}
func (c *Command) scanSubcommandHandler(parentg *Group) scanHandler {
f := func(realval reflect.Value, sfield *reflect.StructField) (bool, error) {
mtag := newMultiTag(string(sfield.Tag))
if err := mtag.Parse(); err != nil {
return true, err
}
positional := mtag.Get("positional-args")
if len(positional) != 0 {
stype := realval.Type()
for i := 0; i < stype.NumField(); i++ {
field := stype.Field(i)
m := newMultiTag((string(field.Tag)))
if err := m.Parse(); err != nil {
return true, err
}
name := m.Get("positional-arg-name")
if len(name) == 0 {
name = field.Name
}
required := -1
requiredMaximum := -1
sreq := m.Get("required")
if sreq != "" {
required = 1
rng := strings.SplitN(sreq, "-", 2)
if len(rng) > 1 {
if preq, err := strconv.ParseInt(rng[0], 10, 32); err == nil {
required = int(preq)
}
if preq, err := strconv.ParseInt(rng[1], 10, 32); err == nil {
requiredMaximum = int(preq)
}
} else {
if preq, err := strconv.ParseInt(sreq, 10, 32); err == nil {
required = int(preq)
}
}
}
arg := &Arg{
Name: name,
Description: m.Get("description"),
Required: required,
RequiredMaximum: requiredMaximum,
value: realval.Field(i),
tag: m,
}
c.args = append(c.args, arg)
if len(mtag.Get("required")) != 0 {
c.ArgsRequired = true
}
}
return true, nil
}
subcommand := mtag.Get("command")
if len(subcommand) != 0 {
var ptrval reflect.Value
if realval.Kind() == reflect.Ptr {
ptrval = realval
if ptrval.IsNil() {
ptrval.Set(reflect.New(ptrval.Type().Elem()))
}
} else {
ptrval = realval.Addr()
}
shortDescription := mtag.Get("description")
longDescription := mtag.Get("long-description")
subcommandsOptional := mtag.Get("subcommands-optional")
aliases := mtag.GetMany("alias")
subc, err := c.AddCommand(subcommand, shortDescription, longDescription, ptrval.Interface())
if err != nil {
return true, err
}
subc.Hidden = mtag.Get("hidden") != ""
if len(subcommandsOptional) > 0 {
subc.SubcommandsOptional = true
}
if len(aliases) > 0 {
subc.Aliases = aliases
}
return true, nil
}
return parentg.scanSubGroupHandler(realval, sfield)
}
return f
}
func (c *Command) scan() error {
return c.scanType(c.scanSubcommandHandler(c.Group))
}
func (c *Command) eachOption(f func(*Command, *Group, *Option)) {
c.eachCommand(func(c *Command) {
c.eachGroup(func(g *Group) {
for _, option := range g.options {
f(c, g, option)
}
})
}, true)
}
func (c *Command) eachCommand(f func(*Command), recurse bool) {
f(c)
for _, cc := range c.commands {
if recurse {
cc.eachCommand(f, true)
} else {
f(cc)
}
}
}
func (c *Command) eachActiveGroup(f func(cc *Command, g *Group)) {
c.eachGroup(func(g *Group) {
f(c, g)
})
if c.Active != nil {
c.Active.eachActiveGroup(f)
}
}
func (c *Command) addHelpGroups(showHelp func() error) {
if !c.hasBuiltinHelpGroup {
c.addHelpGroup(showHelp)
c.hasBuiltinHelpGroup = true
}
for _, cc := range c.commands {
cc.addHelpGroups(showHelp)
}
}
func (c *Command) makeLookup() lookup {
ret := lookup{
shortNames: make(map[string]*Option),
longNames: make(map[string]*Option),
commands: make(map[string]*Command),
}
parent := c.parent
var parents []*Command
for parent != nil {
if cmd, ok := parent.(*Command); ok {
parents = append(parents, cmd)
parent = cmd.parent
} else {
parent = nil
}
}
for i := len(parents) - 1; i >= 0; i-- {
parents[i].fillLookup(&ret, true)
}
c.fillLookup(&ret, false)
return ret
}
func (c *Command) fillLookup(ret *lookup, onlyOptions bool) {
c.eachGroup(func(g *Group) {
for _, option := range g.options {
if option.ShortName != 0 {
ret.shortNames[string(option.ShortName)] = option
}
if len(option.LongName) > 0 {
ret.longNames[option.LongNameWithNamespace()] = option
}
}
})
if onlyOptions {
return
}
for _, subcommand := range c.commands {
ret.commands[subcommand.Name] = subcommand
for _, a := range subcommand.Aliases {
ret.commands[a] = subcommand
}
}
}
func (c *Command) groupByName(name string) *Group {
if grp := c.Group.groupByName(name); grp != nil {
return grp
}
for _, subc := range c.commands {
prefix := subc.Name + "."
if strings.HasPrefix(name, prefix) {
if grp := subc.groupByName(name[len(prefix):]); grp != nil {
return grp
}
} else if name == subc.Name {
return subc.Group
}
}
return nil
}
type commandList []*Command
func (c commandList) Less(i, j int) bool {
return c[i].Name < c[j].Name
}
func (c commandList) Len() int {
return len(c)
}
func (c commandList) Swap(i, j int) {
c[i], c[j] = c[j], c[i]
}
func (c *Command) sortedVisibleCommands() []*Command {
ret := commandList(c.visibleCommands())
sort.Sort(ret)
return []*Command(ret)
}
func (c *Command) visibleCommands() []*Command {
ret := make([]*Command, 0, len(c.commands))
for _, cmd := range c.commands {
if !cmd.Hidden {
ret = append(ret, cmd)
}
}
return ret
}
func (c *Command) match(name string) bool {
if c.Name == name {
return true
}
for _, v := range c.Aliases {
if v == name {
return true
}
}
return false
}
func (c *Command) hasCliOptions() bool {
ret := false
c.eachGroup(func(g *Group) {
if g.isBuiltinHelp {
return
}
for _, opt := range g.options {
if opt.canCli() {
ret = true
}
}
})
return ret
}
func (c *Command) fillParseState(s *parseState) {
s.positional = make([]*Arg, len(c.args))
copy(s.positional, c.args)
s.lookup = c.makeLookup()
s.command = c
}

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package flags
import (
"fmt"
"path/filepath"
"reflect"
"sort"
"strings"
"unicode/utf8"
)
// Completion is a type containing information of a completion.
type Completion struct {
// The completed item
Item string
// A description of the completed item (optional)
Description string
}
type completions []Completion
func (c completions) Len() int {
return len(c)
}
func (c completions) Less(i, j int) bool {
return c[i].Item < c[j].Item
}
func (c completions) Swap(i, j int) {
c[i], c[j] = c[j], c[i]
}
// Completer is an interface which can be implemented by types
// to provide custom command line argument completion.
type Completer interface {
// Complete receives a prefix representing a (partial) value
// for its type and should provide a list of possible valid
// completions.
Complete(match string) []Completion
}
type completion struct {
parser *Parser
}
// Filename is a string alias which provides filename completion.
type Filename string
func completionsWithoutDescriptions(items []string) []Completion {
ret := make([]Completion, len(items))
for i, v := range items {
ret[i].Item = v
}
return ret
}
// Complete returns a list of existing files with the given
// prefix.
func (f *Filename) Complete(match string) []Completion {
ret, _ := filepath.Glob(match + "*")
return completionsWithoutDescriptions(ret)
}
func (c *completion) skipPositional(s *parseState, n int) {
if n >= len(s.positional) {
s.positional = nil
} else {
s.positional = s.positional[n:]
}
}
func (c *completion) completeOptionNames(s *parseState, prefix string, match string, short bool) []Completion {
if short && len(match) != 0 {
return []Completion{
Completion{
Item: prefix + match,
},
}
}
var results []Completion
repeats := map[string]bool{}
for name, opt := range s.lookup.longNames {
if strings.HasPrefix(name, match) && !opt.Hidden {
results = append(results, Completion{
Item: defaultLongOptDelimiter + name,
Description: opt.Description,
})
if short {
repeats[string(opt.ShortName)] = true
}
}
}
if short {
for name, opt := range s.lookup.shortNames {
if _, exist := repeats[name]; !exist && strings.HasPrefix(name, match) && !opt.Hidden {
results = append(results, Completion{
Item: string(defaultShortOptDelimiter) + name,
Description: opt.Description,
})
}
}
}
return results
}
func (c *completion) completeNamesForLongPrefix(s *parseState, prefix string, match string) []Completion {
return c.completeOptionNames(s, prefix, match, false)
}
func (c *completion) completeNamesForShortPrefix(s *parseState, prefix string, match string) []Completion {
return c.completeOptionNames(s, prefix, match, true)
}
func (c *completion) completeCommands(s *parseState, match string) []Completion {
n := make([]Completion, 0, len(s.command.commands))
for _, cmd := range s.command.commands {
if cmd.data != c && strings.HasPrefix(cmd.Name, match) {
n = append(n, Completion{
Item: cmd.Name,
Description: cmd.ShortDescription,
})
}
}
return n
}
func (c *completion) completeValue(value reflect.Value, prefix string, match string) []Completion {
if value.Kind() == reflect.Slice {
value = reflect.New(value.Type().Elem())
}
i := value.Interface()
var ret []Completion
if cmp, ok := i.(Completer); ok {
ret = cmp.Complete(match)
} else if value.CanAddr() {
if cmp, ok = value.Addr().Interface().(Completer); ok {
ret = cmp.Complete(match)
}
}
for i, v := range ret {
ret[i].Item = prefix + v.Item
}
return ret
}
func (c *completion) complete(args []string) []Completion {
if len(args) == 0 {
args = []string{""}
}
s := &parseState{
args: args,
}
c.parser.fillParseState(s)
var opt *Option
for len(s.args) > 1 {
arg := s.pop()
if (c.parser.Options&PassDoubleDash) != None && arg == "--" {
opt = nil
c.skipPositional(s, len(s.args)-1)
break
}
if argumentIsOption(arg) {
prefix, optname, islong := stripOptionPrefix(arg)
optname, _, argument := splitOption(prefix, optname, islong)
if argument == nil {
var o *Option
canarg := true
if islong {
o = s.lookup.longNames[optname]
} else {
for i, r := range optname {
sname := string(r)
o = s.lookup.shortNames[sname]
if o == nil {
break
}
if i == 0 && o.canArgument() && len(optname) != len(sname) {
canarg = false
break
}
}
}
if o == nil && (c.parser.Options&PassAfterNonOption) != None {
opt = nil
c.skipPositional(s, len(s.args)-1)
break
} else if o != nil && o.canArgument() && !o.OptionalArgument && canarg {
if len(s.args) > 1 {
s.pop()
} else {
opt = o
}
}
}
} else {
if len(s.positional) > 0 {
if !s.positional[0].isRemaining() {
// Don't advance beyond a remaining positional arg (because
// it consumes all subsequent args).
s.positional = s.positional[1:]
}
} else if cmd, ok := s.lookup.commands[arg]; ok {
cmd.fillParseState(s)
}
opt = nil
}
}
lastarg := s.args[len(s.args)-1]
var ret []Completion
if opt != nil {
// Completion for the argument of 'opt'
ret = c.completeValue(opt.value, "", lastarg)
} else if argumentStartsOption(lastarg) {
// Complete the option
prefix, optname, islong := stripOptionPrefix(lastarg)
optname, split, argument := splitOption(prefix, optname, islong)
if argument == nil && !islong {
rname, n := utf8.DecodeRuneInString(optname)
sname := string(rname)
if opt := s.lookup.shortNames[sname]; opt != nil && opt.canArgument() {
ret = c.completeValue(opt.value, prefix+sname, optname[n:])
} else {
ret = c.completeNamesForShortPrefix(s, prefix, optname)
}
} else if argument != nil {
if islong {
opt = s.lookup.longNames[optname]
} else {
opt = s.lookup.shortNames[optname]
}
if opt != nil {
ret = c.completeValue(opt.value, prefix+optname+split, *argument)
}
} else if islong {
ret = c.completeNamesForLongPrefix(s, prefix, optname)
} else {
ret = c.completeNamesForShortPrefix(s, prefix, optname)
}
} else if len(s.positional) > 0 {
// Complete for positional argument
ret = c.completeValue(s.positional[0].value, "", lastarg)
} else if len(s.command.commands) > 0 {
// Complete for command
ret = c.completeCommands(s, lastarg)
}
sort.Sort(completions(ret))
return ret
}
func (c *completion) print(items []Completion, showDescriptions bool) {
if showDescriptions && len(items) > 1 {
maxl := 0
for _, v := range items {
if len(v.Item) > maxl {
maxl = len(v.Item)
}
}
for _, v := range items {
fmt.Printf("%s", v.Item)
if len(v.Description) > 0 {
fmt.Printf("%s # %s", strings.Repeat(" ", maxl-len(v.Item)), v.Description)
}
fmt.Printf("\n")
}
} else {
for _, v := range items {
fmt.Println(v.Item)
}
}
}

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// Copyright 2012 Jesse van den Kieboom. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package flags
import (
"fmt"
"reflect"
"strconv"
"strings"
"time"
)
// Marshaler is the interface implemented by types that can marshal themselves
// to a string representation of the flag.
type Marshaler interface {
// MarshalFlag marshals a flag value to its string representation.
MarshalFlag() (string, error)
}
// Unmarshaler is the interface implemented by types that can unmarshal a flag
// argument to themselves. The provided value is directly passed from the
// command line.
type Unmarshaler interface {
// UnmarshalFlag unmarshals a string value representation to the flag
// value (which therefore needs to be a pointer receiver).
UnmarshalFlag(value string) error
}
func getBase(options multiTag, base int) (int, error) {
sbase := options.Get("base")
var err error
var ivbase int64
if sbase != "" {
ivbase, err = strconv.ParseInt(sbase, 10, 32)
base = int(ivbase)
}
return base, err
}
func convertMarshal(val reflect.Value) (bool, string, error) {
// Check first for the Marshaler interface
if val.Type().NumMethod() > 0 && val.CanInterface() {
if marshaler, ok := val.Interface().(Marshaler); ok {
ret, err := marshaler.MarshalFlag()
return true, ret, err
}
}
return false, "", nil
}
func convertToString(val reflect.Value, options multiTag) (string, error) {
if ok, ret, err := convertMarshal(val); ok {
return ret, err
}
tp := val.Type()
// Support for time.Duration
if tp == reflect.TypeOf((*time.Duration)(nil)).Elem() {
stringer := val.Interface().(fmt.Stringer)
return stringer.String(), nil
}
switch tp.Kind() {
case reflect.String:
return val.String(), nil
case reflect.Bool:
if val.Bool() {
return "true", nil
}
return "false", nil
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
base, err := getBase(options, 10)
if err != nil {
return "", err
}
return strconv.FormatInt(val.Int(), base), nil
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
base, err := getBase(options, 10)
if err != nil {
return "", err
}
return strconv.FormatUint(val.Uint(), base), nil
case reflect.Float32, reflect.Float64:
return strconv.FormatFloat(val.Float(), 'g', -1, tp.Bits()), nil
case reflect.Slice:
if val.Len() == 0 {
return "", nil
}
ret := "["
for i := 0; i < val.Len(); i++ {
if i != 0 {
ret += ", "
}
item, err := convertToString(val.Index(i), options)
if err != nil {
return "", err
}
ret += item
}
return ret + "]", nil
case reflect.Map:
ret := "{"
for i, key := range val.MapKeys() {
if i != 0 {
ret += ", "
}
keyitem, err := convertToString(key, options)
if err != nil {
return "", err
}
item, err := convertToString(val.MapIndex(key), options)
if err != nil {
return "", err
}
ret += keyitem + ":" + item
}
return ret + "}", nil
case reflect.Ptr:
return convertToString(reflect.Indirect(val), options)
case reflect.Interface:
if !val.IsNil() {
return convertToString(val.Elem(), options)
}
}
return "", nil
}
func convertUnmarshal(val string, retval reflect.Value) (bool, error) {
if retval.Type().NumMethod() > 0 && retval.CanInterface() {
if unmarshaler, ok := retval.Interface().(Unmarshaler); ok {
if retval.IsNil() {
retval.Set(reflect.New(retval.Type().Elem()))
// Re-assign from the new value
unmarshaler = retval.Interface().(Unmarshaler)
}
return true, unmarshaler.UnmarshalFlag(val)
}
}
if retval.Type().Kind() != reflect.Ptr && retval.CanAddr() {
return convertUnmarshal(val, retval.Addr())
}
if retval.Type().Kind() == reflect.Interface && !retval.IsNil() {
return convertUnmarshal(val, retval.Elem())
}
return false, nil
}
func convert(val string, retval reflect.Value, options multiTag) error {
if ok, err := convertUnmarshal(val, retval); ok {
return err
}
tp := retval.Type()
// Support for time.Duration
if tp == reflect.TypeOf((*time.Duration)(nil)).Elem() {
parsed, err := time.ParseDuration(val)
if err != nil {
return err
}
retval.SetInt(int64(parsed))
return nil
}
switch tp.Kind() {
case reflect.String:
retval.SetString(val)
case reflect.Bool:
if val == "" {
retval.SetBool(true)
} else {
b, err := strconv.ParseBool(val)
if err != nil {
return err
}
retval.SetBool(b)
}
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
base, err := getBase(options, 10)
if err != nil {
return err
}
parsed, err := strconv.ParseInt(val, base, tp.Bits())
if err != nil {
return err
}
retval.SetInt(parsed)
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
base, err := getBase(options, 10)
if err != nil {
return err
}
parsed, err := strconv.ParseUint(val, base, tp.Bits())
if err != nil {
return err
}
retval.SetUint(parsed)
case reflect.Float32, reflect.Float64:
parsed, err := strconv.ParseFloat(val, tp.Bits())
if err != nil {
return err
}
retval.SetFloat(parsed)
case reflect.Slice:
elemtp := tp.Elem()
elemvalptr := reflect.New(elemtp)
elemval := reflect.Indirect(elemvalptr)
if err := convert(val, elemval, options); err != nil {
return err
}
retval.Set(reflect.Append(retval, elemval))
case reflect.Map:
parts := strings.SplitN(val, ":", 2)
key := parts[0]
var value string
if len(parts) == 2 {
value = parts[1]
}
keytp := tp.Key()
keyval := reflect.New(keytp)
if err := convert(key, keyval, options); err != nil {
return err
}
valuetp := tp.Elem()
valueval := reflect.New(valuetp)
if err := convert(value, valueval, options); err != nil {
return err
}
if retval.IsNil() {
retval.Set(reflect.MakeMap(tp))
}
retval.SetMapIndex(reflect.Indirect(keyval), reflect.Indirect(valueval))
case reflect.Ptr:
if retval.IsNil() {
retval.Set(reflect.New(retval.Type().Elem()))
}
return convert(val, reflect.Indirect(retval), options)
case reflect.Interface:
if !retval.IsNil() {
return convert(val, retval.Elem(), options)
}
}
return nil
}
func isPrint(s string) bool {
for _, c := range s {
if !strconv.IsPrint(c) {
return false
}
}
return true
}
func quoteIfNeeded(s string) string {
if !isPrint(s) {
return strconv.Quote(s)
}
return s
}
func quoteIfNeededV(s []string) []string {
ret := make([]string, len(s))
for i, v := range s {
ret[i] = quoteIfNeeded(v)
}
return ret
}
func quoteV(s []string) []string {
ret := make([]string, len(s))
for i, v := range s {
ret[i] = strconv.Quote(v)
}
return ret
}
func unquoteIfPossible(s string) (string, error) {
if len(s) == 0 || s[0] != '"' {
return s, nil
}
return strconv.Unquote(s)
}

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package flags
import (
"fmt"
)
// ErrorType represents the type of error.
type ErrorType uint
const (
// ErrUnknown indicates a generic error.
ErrUnknown ErrorType = iota
// ErrExpectedArgument indicates that an argument was expected.
ErrExpectedArgument
// ErrUnknownFlag indicates an unknown flag.
ErrUnknownFlag
// ErrUnknownGroup indicates an unknown group.
ErrUnknownGroup
// ErrMarshal indicates a marshalling error while converting values.
ErrMarshal
// ErrHelp indicates that the built-in help was shown (the error
// contains the help message).
ErrHelp
// ErrNoArgumentForBool indicates that an argument was given for a
// boolean flag (which don't not take any arguments).
ErrNoArgumentForBool
// ErrRequired indicates that a required flag was not provided.
ErrRequired
// ErrShortNameTooLong indicates that a short flag name was specified,
// longer than one character.
ErrShortNameTooLong
// ErrDuplicatedFlag indicates that a short or long flag has been
// defined more than once
ErrDuplicatedFlag
// ErrTag indicates an error while parsing flag tags.
ErrTag
// ErrCommandRequired indicates that a command was required but not
// specified
ErrCommandRequired
// ErrUnknownCommand indicates that an unknown command was specified.
ErrUnknownCommand
// ErrInvalidChoice indicates an invalid option value which only allows
// a certain number of choices.
ErrInvalidChoice
// ErrInvalidTag indicates an invalid tag or invalid use of an existing tag
ErrInvalidTag
)
func (e ErrorType) String() string {
switch e {
case ErrUnknown:
return "unknown"
case ErrExpectedArgument:
return "expected argument"
case ErrUnknownFlag:
return "unknown flag"
case ErrUnknownGroup:
return "unknown group"
case ErrMarshal:
return "marshal"
case ErrHelp:
return "help"
case ErrNoArgumentForBool:
return "no argument for bool"
case ErrRequired:
return "required"
case ErrShortNameTooLong:
return "short name too long"
case ErrDuplicatedFlag:
return "duplicated flag"
case ErrTag:
return "tag"
case ErrCommandRequired:
return "command required"
case ErrUnknownCommand:
return "unknown command"
case ErrInvalidChoice:
return "invalid choice"
case ErrInvalidTag:
return "invalid tag"
}
return "unrecognized error type"
}
// Error represents a parser error. The error returned from Parse is of this
// type. The error contains both a Type and Message.
type Error struct {
// The type of error
Type ErrorType
// The error message
Message string
}
// Error returns the error's message
func (e *Error) Error() string {
return e.Message
}
func newError(tp ErrorType, message string) *Error {
return &Error{
Type: tp,
Message: message,
}
}
func newErrorf(tp ErrorType, format string, args ...interface{}) *Error {
return newError(tp, fmt.Sprintf(format, args...))
}
func wrapError(err error) *Error {
ret, ok := err.(*Error)
if !ok {
return newError(ErrUnknown, err.Error())
}
return ret
}

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// Copyright 2012 Jesse van den Kieboom. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
/*
Package flags provides an extensive command line option parser.
The flags package is similar in functionality to the go built-in flag package
but provides more options and uses reflection to provide a convenient and
succinct way of specifying command line options.
Supported features
The following features are supported in go-flags:
Options with short names (-v)
Options with long names (--verbose)
Options with and without arguments (bool v.s. other type)
Options with optional arguments and default values
Option default values from ENVIRONMENT_VARIABLES, including slice and map values
Multiple option groups each containing a set of options
Generate and print well-formatted help message
Passing remaining command line arguments after -- (optional)
Ignoring unknown command line options (optional)
Supports -I/usr/include -I=/usr/include -I /usr/include option argument specification
Supports multiple short options -aux
Supports all primitive go types (string, int{8..64}, uint{8..64}, float)
Supports same option multiple times (can store in slice or last option counts)
Supports maps
Supports function callbacks
Supports namespaces for (nested) option groups
Additional features specific to Windows:
Options with short names (/v)
Options with long names (/verbose)
Windows-style options with arguments use a colon as the delimiter
Modify generated help message with Windows-style / options
Windows style options can be disabled at build time using the "forceposix"
build tag
Basic usage
The flags package uses structs, reflection and struct field tags
to allow users to specify command line options. This results in very simple
and concise specification of your application options. For example:
type Options struct {
Verbose []bool `short:"v" long:"verbose" description:"Show verbose debug information"`
}
This specifies one option with a short name -v and a long name --verbose.
When either -v or --verbose is found on the command line, a 'true' value
will be appended to the Verbose field. e.g. when specifying -vvv, the
resulting value of Verbose will be {[true, true, true]}.
Slice options work exactly the same as primitive type options, except that
whenever the option is encountered, a value is appended to the slice.
Map options from string to primitive type are also supported. On the command
line, you specify the value for such an option as key:value. For example
type Options struct {
AuthorInfo string[string] `short:"a"`
}
Then, the AuthorInfo map can be filled with something like
-a name:Jesse -a "surname:van den Kieboom".
Finally, for full control over the conversion between command line argument
values and options, user defined types can choose to implement the Marshaler
and Unmarshaler interfaces.
Available field tags
The following is a list of tags for struct fields supported by go-flags:
short: the short name of the option (single character)
long: the long name of the option
required: if non empty, makes the option required to appear on the command
line. If a required option is not present, the parser will
return ErrRequired (optional)
description: the description of the option (optional)
long-description: the long description of the option. Currently only
displayed in generated man pages (optional)
no-flag: if non-empty, this field is ignored as an option (optional)
optional: if non-empty, makes the argument of the option optional. When an
argument is optional it can only be specified using
--option=argument (optional)
optional-value: the value of an optional option when the option occurs
without an argument. This tag can be specified multiple
times in the case of maps or slices (optional)
default: the default value of an option. This tag can be specified
multiple times in the case of slices or maps (optional)
default-mask: when specified, this value will be displayed in the help
instead of the actual default value. This is useful
mostly for hiding otherwise sensitive information from
showing up in the help. If default-mask takes the special
value "-", then no default value will be shown at all
(optional)
env: the default value of the option is overridden from the
specified environment variable, if one has been defined.
(optional)
env-delim: the 'env' default value from environment is split into
multiple values with the given delimiter string, use with
slices and maps (optional)
value-name: the name of the argument value (to be shown in the help)
(optional)
choice: limits the values for an option to a set of values.
This tag can be specified multiple times (optional)
hidden: if non-empty, the option is not visible in the help or man page.
base: a base (radix) used to convert strings to integer values, the
default base is 10 (i.e. decimal) (optional)
ini-name: the explicit ini option name (optional)
no-ini: if non-empty this field is ignored as an ini option
(optional)
group: when specified on a struct field, makes the struct
field a separate group with the given name (optional)
namespace: when specified on a group struct field, the namespace
gets prepended to every option's long name and
subgroup's namespace of this group, separated by
the parser's namespace delimiter (optional)
command: when specified on a struct field, makes the struct
field a (sub)command with the given name (optional)
subcommands-optional: when specified on a command struct field, makes
any subcommands of that command optional (optional)
alias: when specified on a command struct field, adds the
specified name as an alias for the command. Can be
be specified multiple times to add more than one
alias (optional)
positional-args: when specified on a field with a struct type,
uses the fields of that struct to parse remaining
positional command line arguments into (in order
of the fields). If a field has a slice type,
then all remaining arguments will be added to it.
Positional arguments are optional by default,
unless the "required" tag is specified together
with the "positional-args" tag. The "required" tag
can also be set on the individual rest argument
fields, to require only the first N positional
arguments. If the "required" tag is set on the
rest arguments slice, then its value determines
the minimum amount of rest arguments that needs to
be provided (e.g. `required:"2"`) (optional)
positional-arg-name: used on a field in a positional argument struct; name
of the positional argument placeholder to be shown in
the help (optional)
Either the `short:` tag or the `long:` must be specified to make the field eligible as an
option.
Option groups
Option groups are a simple way to semantically separate your options. All
options in a particular group are shown together in the help under the name
of the group. Namespaces can be used to specify option long names more
precisely and emphasize the options affiliation to their group.
There are currently three ways to specify option groups.
1. Use NewNamedParser specifying the various option groups.
2. Use AddGroup to add a group to an existing parser.
3. Add a struct field to the top-level options annotated with the
group:"group-name" tag.
Commands
The flags package also has basic support for commands. Commands are often
used in monolithic applications that support various commands or actions.
Take git for example, all of the add, commit, checkout, etc. are called
commands. Using commands you can easily separate multiple functions of your
application.
There are currently two ways to specify a command.
1. Use AddCommand on an existing parser.
2. Add a struct field to your options struct annotated with the
command:"command-name" tag.
The most common, idiomatic way to implement commands is to define a global
parser instance and implement each command in a separate file. These
command files should define a go init function which calls AddCommand on
the global parser.
When parsing ends and there is an active command and that command implements
the Commander interface, then its Execute method will be run with the
remaining command line arguments.
Command structs can have options which become valid to parse after the
command has been specified on the command line, in addition to the options
of all the parent commands. I.e. considering a -v flag on the parser and an
add command, the following are equivalent:
./app -v add
./app add -v
However, if the -v flag is defined on the add command, then the first of
the two examples above would fail since the -v flag is not defined before
the add command.
Completion
go-flags has builtin support to provide bash completion of flags, commands
and argument values. To use completion, the binary which uses go-flags
can be invoked in a special environment to list completion of the current
command line argument. It should be noted that this `executes` your application,
and it is up to the user to make sure there are no negative side effects (for
example from init functions).
Setting the environment variable `GO_FLAGS_COMPLETION=1` enables completion
by replacing the argument parsing routine with the completion routine which
outputs completions for the passed arguments. The basic invocation to
complete a set of arguments is therefore:
GO_FLAGS_COMPLETION=1 ./completion-example arg1 arg2 arg3
where `completion-example` is the binary, `arg1` and `arg2` are
the current arguments, and `arg3` (the last argument) is the argument
to be completed. If the GO_FLAGS_COMPLETION is set to "verbose", then
descriptions of possible completion items will also be shown, if there
are more than 1 completion items.
To use this with bash completion, a simple file can be written which
calls the binary which supports go-flags completion:
_completion_example() {
# All arguments except the first one
args=("${COMP_WORDS[@]:1:$COMP_CWORD}")
# Only split on newlines
local IFS=$'\n'
# Call completion (note that the first element of COMP_WORDS is
# the executable itself)
COMPREPLY=($(GO_FLAGS_COMPLETION=1 ${COMP_WORDS[0]} "${args[@]}"))
return 0
}
complete -F _completion_example completion-example
Completion requires the parser option PassDoubleDash and is therefore enforced if the environment variable GO_FLAGS_COMPLETION is set.
Customized completion for argument values is supported by implementing
the flags.Completer interface for the argument value type. An example
of a type which does so is the flags.Filename type, an alias of string
allowing simple filename completion. A slice or array argument value
whose element type implements flags.Completer will also be completed.
*/
package flags

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// Copyright 2012 Jesse van den Kieboom. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package flags
import (
"errors"
"reflect"
"strings"
"unicode/utf8"
)
// ErrNotPointerToStruct indicates that a provided data container is not
// a pointer to a struct. Only pointers to structs are valid data containers
// for options.
var ErrNotPointerToStruct = errors.New("provided data is not a pointer to struct")
// Group represents an option group. Option groups can be used to logically
// group options together under a description. Groups are only used to provide
// more structure to options both for the user (as displayed in the help message)
// and for you, since groups can be nested.
type Group struct {
// A short description of the group. The
// short description is primarily used in the built-in generated help
// message
ShortDescription string
// A long description of the group. The long
// description is primarily used to present information on commands
// (Command embeds Group) in the built-in generated help and man pages.
LongDescription string
// The namespace of the group
Namespace string
// If true, the group is not displayed in the help or man page
Hidden bool
// The parent of the group or nil if it has no parent
parent interface{}
// All the options in the group
options []*Option
// All the subgroups
groups []*Group
// Whether the group represents the built-in help group
isBuiltinHelp bool
data interface{}
}
type scanHandler func(reflect.Value, *reflect.StructField) (bool, error)
// AddGroup adds a new group to the command with the given name and data. The
// data needs to be a pointer to a struct from which the fields indicate which
// options are in the group.
func (g *Group) AddGroup(shortDescription string, longDescription string, data interface{}) (*Group, error) {
group := newGroup(shortDescription, longDescription, data)
group.parent = g
if err := group.scan(); err != nil {
return nil, err
}
g.groups = append(g.groups, group)
return group, nil
}
// Groups returns the list of groups embedded in this group.
func (g *Group) Groups() []*Group {
return g.groups
}
// Options returns the list of options in this group.
func (g *Group) Options() []*Option {
return g.options
}
// Find locates the subgroup with the given short description and returns it.
// If no such group can be found Find will return nil. Note that the description
// is matched case insensitively.
func (g *Group) Find(shortDescription string) *Group {
lshortDescription := strings.ToLower(shortDescription)
var ret *Group
g.eachGroup(func(gg *Group) {
if gg != g && strings.ToLower(gg.ShortDescription) == lshortDescription {
ret = gg
}
})
return ret
}
func (g *Group) findOption(matcher func(*Option) bool) (option *Option) {
g.eachGroup(func(g *Group) {
for _, opt := range g.options {
if option == nil && matcher(opt) {
option = opt
}
}
})
return option
}
// FindOptionByLongName finds an option that is part of the group, or any of its
// subgroups, by matching its long name (including the option namespace).
func (g *Group) FindOptionByLongName(longName string) *Option {
return g.findOption(func(option *Option) bool {
return option.LongNameWithNamespace() == longName
})
}
// FindOptionByShortName finds an option that is part of the group, or any of
// its subgroups, by matching its short name.
func (g *Group) FindOptionByShortName(shortName rune) *Option {
return g.findOption(func(option *Option) bool {
return option.ShortName == shortName
})
}
func newGroup(shortDescription string, longDescription string, data interface{}) *Group {
return &Group{
ShortDescription: shortDescription,
LongDescription: longDescription,
data: data,
}
}
func (g *Group) optionByName(name string, namematch func(*Option, string) bool) *Option {
prio := 0
var retopt *Option
g.eachGroup(func(g *Group) {
for _, opt := range g.options {
if namematch != nil && namematch(opt, name) && prio < 4 {
retopt = opt
prio = 4
}
if name == opt.field.Name && prio < 3 {
retopt = opt
prio = 3
}
if name == opt.LongNameWithNamespace() && prio < 2 {
retopt = opt
prio = 2
}
if opt.ShortName != 0 && name == string(opt.ShortName) && prio < 1 {
retopt = opt
prio = 1
}
}
})
return retopt
}
func (g *Group) eachGroup(f func(*Group)) {
f(g)
for _, gg := range g.groups {
gg.eachGroup(f)
}
}
func isStringFalsy(s string) bool {
return s == "" || s == "false" || s == "no" || s == "0"
}
func (g *Group) scanStruct(realval reflect.Value, sfield *reflect.StructField, handler scanHandler) error {
stype := realval.Type()
if sfield != nil {
if ok, err := handler(realval, sfield); err != nil {
return err
} else if ok {
return nil
}
}
for i := 0; i < stype.NumField(); i++ {
field := stype.Field(i)
// PkgName is set only for non-exported fields, which we ignore
if field.PkgPath != "" && !field.Anonymous {
continue
}
mtag := newMultiTag(string(field.Tag))
if err := mtag.Parse(); err != nil {
return err
}
// Skip fields with the no-flag tag
if mtag.Get("no-flag") != "" {
continue
}
// Dive deep into structs or pointers to structs
kind := field.Type.Kind()
fld := realval.Field(i)
if kind == reflect.Struct {
if err := g.scanStruct(fld, &field, handler); err != nil {
return err
}
} else if kind == reflect.Ptr && field.Type.Elem().Kind() == reflect.Struct {
flagCountBefore := len(g.options) + len(g.groups)
if fld.IsNil() {
fld = reflect.New(fld.Type().Elem())
}
if err := g.scanStruct(reflect.Indirect(fld), &field, handler); err != nil {
return err
}
if len(g.options)+len(g.groups) != flagCountBefore {
realval.Field(i).Set(fld)
}
}
longname := mtag.Get("long")
shortname := mtag.Get("short")
// Need at least either a short or long name
if longname == "" && shortname == "" && mtag.Get("ini-name") == "" {
continue
}
short := rune(0)
rc := utf8.RuneCountInString(shortname)
if rc > 1 {
return newErrorf(ErrShortNameTooLong,
"short names can only be 1 character long, not `%s'",
shortname)
} else if rc == 1 {
short, _ = utf8.DecodeRuneInString(shortname)
}
description := mtag.Get("description")
def := mtag.GetMany("default")
optionalValue := mtag.GetMany("optional-value")
valueName := mtag.Get("value-name")
defaultMask := mtag.Get("default-mask")
optional := !isStringFalsy(mtag.Get("optional"))
required := !isStringFalsy(mtag.Get("required"))
choices := mtag.GetMany("choice")
hidden := !isStringFalsy(mtag.Get("hidden"))
option := &Option{
Description: description,
ShortName: short,
LongName: longname,
Default: def,
EnvDefaultKey: mtag.Get("env"),
EnvDefaultDelim: mtag.Get("env-delim"),
OptionalArgument: optional,
OptionalValue: optionalValue,
Required: required,
ValueName: valueName,
DefaultMask: defaultMask,
Choices: choices,
Hidden: hidden,
group: g,
field: field,
value: realval.Field(i),
tag: mtag,
}
if option.isBool() && option.Default != nil {
return newErrorf(ErrInvalidTag,
"boolean flag `%s' may not have default values, they always default to `false' and can only be turned on",
option.shortAndLongName())
}
g.options = append(g.options, option)
}
return nil
}
func (g *Group) checkForDuplicateFlags() *Error {
shortNames := make(map[rune]*Option)
longNames := make(map[string]*Option)
var duplicateError *Error
g.eachGroup(func(g *Group) {
for _, option := range g.options {
if option.LongName != "" {
longName := option.LongNameWithNamespace()
if otherOption, ok := longNames[longName]; ok {
duplicateError = newErrorf(ErrDuplicatedFlag, "option `%s' uses the same long name as option `%s'", option, otherOption)
return
}
longNames[longName] = option
}
if option.ShortName != 0 {
if otherOption, ok := shortNames[option.ShortName]; ok {
duplicateError = newErrorf(ErrDuplicatedFlag, "option `%s' uses the same short name as option `%s'", option, otherOption)
return
}
shortNames[option.ShortName] = option
}
}
})
return duplicateError
}
func (g *Group) scanSubGroupHandler(realval reflect.Value, sfield *reflect.StructField) (bool, error) {
mtag := newMultiTag(string(sfield.Tag))
if err := mtag.Parse(); err != nil {
return true, err
}
subgroup := mtag.Get("group")
if len(subgroup) != 0 {
var ptrval reflect.Value
if realval.Kind() == reflect.Ptr {
ptrval = realval
if ptrval.IsNil() {
ptrval.Set(reflect.New(ptrval.Type()))
}
} else {
ptrval = realval.Addr()
}
description := mtag.Get("description")
group, err := g.AddGroup(subgroup, description, ptrval.Interface())
if err != nil {
return true, err
}
group.Namespace = mtag.Get("namespace")
group.Hidden = mtag.Get("hidden") != ""
return true, nil
}
return false, nil
}
func (g *Group) scanType(handler scanHandler) error {
// Get all the public fields in the data struct
ptrval := reflect.ValueOf(g.data)
if ptrval.Type().Kind() != reflect.Ptr {
panic(ErrNotPointerToStruct)
}
stype := ptrval.Type().Elem()
if stype.Kind() != reflect.Struct {
panic(ErrNotPointerToStruct)
}
realval := reflect.Indirect(ptrval)
if err := g.scanStruct(realval, nil, handler); err != nil {
return err
}
if err := g.checkForDuplicateFlags(); err != nil {
return err
}
return nil
}
func (g *Group) scan() error {
return g.scanType(g.scanSubGroupHandler)
}
func (g *Group) groupByName(name string) *Group {
if len(name) == 0 {
return g
}
return g.Find(name)
}

491
vendor/github.com/jessevdk/go-flags/help.go generated vendored Normal file
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@ -0,0 +1,491 @@
// Copyright 2012 Jesse van den Kieboom. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package flags
import (
"bufio"
"bytes"
"fmt"
"io"
"runtime"
"strings"
"unicode/utf8"
)
type alignmentInfo struct {
maxLongLen int
hasShort bool
hasValueName bool
terminalColumns int
indent bool
}
const (
paddingBeforeOption = 2
distanceBetweenOptionAndDescription = 2
)
func (a *alignmentInfo) descriptionStart() int {
ret := a.maxLongLen + distanceBetweenOptionAndDescription
if a.hasShort {
ret += 2
}
if a.maxLongLen > 0 {
ret += 4
}
if a.hasValueName {
ret += 3
}
return ret
}
func (a *alignmentInfo) updateLen(name string, indent bool) {
l := utf8.RuneCountInString(name)
if indent {
l = l + 4
}
if l > a.maxLongLen {
a.maxLongLen = l
}
}
func (p *Parser) getAlignmentInfo() alignmentInfo {
ret := alignmentInfo{
maxLongLen: 0,
hasShort: false,
hasValueName: false,
terminalColumns: getTerminalColumns(),
}
if ret.terminalColumns <= 0 {
ret.terminalColumns = 80
}
var prevcmd *Command
p.eachActiveGroup(func(c *Command, grp *Group) {
if c != prevcmd {
for _, arg := range c.args {
ret.updateLen(arg.Name, c != p.Command)
}
}
for _, info := range grp.options {
if !info.canCli() {
continue
}
if info.ShortName != 0 {
ret.hasShort = true
}
if len(info.ValueName) > 0 {
ret.hasValueName = true
}
l := info.LongNameWithNamespace() + info.ValueName
if len(info.Choices) != 0 {
l += "[" + strings.Join(info.Choices, "|") + "]"
}
ret.updateLen(l, c != p.Command)
}
})
return ret
}
func wrapText(s string, l int, prefix string) string {
var ret string
if l < 10 {
l = 10
}
// Basic text wrapping of s at spaces to fit in l
lines := strings.Split(s, "\n")
for _, line := range lines {
var retline string
line = strings.TrimSpace(line)
for len(line) > l {
// Try to split on space
suffix := ""
pos := strings.LastIndex(line[:l], " ")
if pos < 0 {
pos = l - 1
suffix = "-\n"
}
if len(retline) != 0 {
retline += "\n" + prefix
}
retline += strings.TrimSpace(line[:pos]) + suffix
line = strings.TrimSpace(line[pos:])
}
if len(line) > 0 {
if len(retline) != 0 {
retline += "\n" + prefix
}
retline += line
}
if len(ret) > 0 {
ret += "\n"
if len(retline) > 0 {
ret += prefix
}
}
ret += retline
}
return ret
}
func (p *Parser) writeHelpOption(writer *bufio.Writer, option *Option, info alignmentInfo) {
line := &bytes.Buffer{}
prefix := paddingBeforeOption
if info.indent {
prefix += 4
}
if option.Hidden {
return
}
line.WriteString(strings.Repeat(" ", prefix))
if option.ShortName != 0 {
line.WriteRune(defaultShortOptDelimiter)
line.WriteRune(option.ShortName)
} else if info.hasShort {
line.WriteString(" ")
}
descstart := info.descriptionStart() + paddingBeforeOption
if len(option.LongName) > 0 {
if option.ShortName != 0 {
line.WriteString(", ")
} else if info.hasShort {
line.WriteString(" ")
}
line.WriteString(defaultLongOptDelimiter)
line.WriteString(option.LongNameWithNamespace())
}
if option.canArgument() {
line.WriteRune(defaultNameArgDelimiter)
if len(option.ValueName) > 0 {
line.WriteString(option.ValueName)
}
if len(option.Choices) > 0 {
line.WriteString("[" + strings.Join(option.Choices, "|") + "]")
}
}
written := line.Len()
line.WriteTo(writer)
if option.Description != "" {
dw := descstart - written
writer.WriteString(strings.Repeat(" ", dw))
var def string
if len(option.DefaultMask) != 0 {
if option.DefaultMask != "-" {
def = option.DefaultMask
}
} else {
def = option.defaultLiteral
}
var envDef string
if option.EnvDefaultKey != "" {
var envPrintable string
if runtime.GOOS == "windows" {
envPrintable = "%" + option.EnvDefaultKey + "%"
} else {
envPrintable = "$" + option.EnvDefaultKey
}
envDef = fmt.Sprintf(" [%s]", envPrintable)
}
var desc string
if def != "" {
desc = fmt.Sprintf("%s (default: %v)%s", option.Description, def, envDef)
} else {
desc = option.Description + envDef
}
writer.WriteString(wrapText(desc,
info.terminalColumns-descstart,
strings.Repeat(" ", descstart)))
}
writer.WriteString("\n")
}
func maxCommandLength(s []*Command) int {
if len(s) == 0 {
return 0
}
ret := len(s[0].Name)
for _, v := range s[1:] {
l := len(v.Name)
if l > ret {
ret = l
}
}
return ret
}
// WriteHelp writes a help message containing all the possible options and
// their descriptions to the provided writer. Note that the HelpFlag parser
// option provides a convenient way to add a -h/--help option group to the
// command line parser which will automatically show the help messages using
// this method.
func (p *Parser) WriteHelp(writer io.Writer) {
if writer == nil {
return
}
wr := bufio.NewWriter(writer)
aligninfo := p.getAlignmentInfo()
cmd := p.Command
for cmd.Active != nil {
cmd = cmd.Active
}
if p.Name != "" {
wr.WriteString("Usage:\n")
wr.WriteString(" ")
allcmd := p.Command
for allcmd != nil {
var usage string
if allcmd == p.Command {
if len(p.Usage) != 0 {
usage = p.Usage
} else if p.Options&HelpFlag != 0 {
usage = "[OPTIONS]"
}
} else if us, ok := allcmd.data.(Usage); ok {
usage = us.Usage()
} else if allcmd.hasCliOptions() {
usage = fmt.Sprintf("[%s-OPTIONS]", allcmd.Name)
}
if len(usage) != 0 {
fmt.Fprintf(wr, " %s %s", allcmd.Name, usage)
} else {
fmt.Fprintf(wr, " %s", allcmd.Name)
}
if len(allcmd.args) > 0 {
fmt.Fprintf(wr, " ")
}
for i, arg := range allcmd.args {
if i != 0 {
fmt.Fprintf(wr, " ")
}
name := arg.Name
if arg.isRemaining() {
name = name + "..."
}
if !allcmd.ArgsRequired {
fmt.Fprintf(wr, "[%s]", name)
} else {
fmt.Fprintf(wr, "%s", name)
}
}
if allcmd.Active == nil && len(allcmd.commands) > 0 {
var co, cc string
if allcmd.SubcommandsOptional {
co, cc = "[", "]"
} else {
co, cc = "<", ">"
}
visibleCommands := allcmd.visibleCommands()
if len(visibleCommands) > 3 {
fmt.Fprintf(wr, " %scommand%s", co, cc)
} else {
subcommands := allcmd.sortedVisibleCommands()
names := make([]string, len(subcommands))
for i, subc := range subcommands {
names[i] = subc.Name
}
fmt.Fprintf(wr, " %s%s%s", co, strings.Join(names, " | "), cc)
}
}
allcmd = allcmd.Active
}
fmt.Fprintln(wr)
if len(cmd.LongDescription) != 0 {
fmt.Fprintln(wr)
t := wrapText(cmd.LongDescription,
aligninfo.terminalColumns,
"")
fmt.Fprintln(wr, t)
}
}
c := p.Command
for c != nil {
printcmd := c != p.Command
c.eachGroup(func(grp *Group) {
first := true
// Skip built-in help group for all commands except the top-level
// parser
if grp.Hidden || (grp.isBuiltinHelp && c != p.Command) {
return
}
for _, info := range grp.options {
if !info.canCli() || info.Hidden {
continue
}
if printcmd {
fmt.Fprintf(wr, "\n[%s command options]\n", c.Name)
aligninfo.indent = true
printcmd = false
}
if first && cmd.Group != grp {
fmt.Fprintln(wr)
if aligninfo.indent {
wr.WriteString(" ")
}
fmt.Fprintf(wr, "%s:\n", grp.ShortDescription)
first = false
}
p.writeHelpOption(wr, info, aligninfo)
}
})
var args []*Arg
for _, arg := range c.args {
if arg.Description != "" {
args = append(args, arg)
}
}
if len(args) > 0 {
if c == p.Command {
fmt.Fprintf(wr, "\nArguments:\n")
} else {
fmt.Fprintf(wr, "\n[%s command arguments]\n", c.Name)
}
descStart := aligninfo.descriptionStart() + paddingBeforeOption
for _, arg := range args {
argPrefix := strings.Repeat(" ", paddingBeforeOption)
argPrefix += arg.Name
if len(arg.Description) > 0 {
argPrefix += ":"
wr.WriteString(argPrefix)
// Space between "arg:" and the description start
descPadding := strings.Repeat(" ", descStart-len(argPrefix))
// How much space the description gets before wrapping
descWidth := aligninfo.terminalColumns - 1 - descStart
// Whitespace to which we can indent new description lines
descPrefix := strings.Repeat(" ", descStart)
wr.WriteString(descPadding)
wr.WriteString(wrapText(arg.Description, descWidth, descPrefix))
} else {
wr.WriteString(argPrefix)
}
fmt.Fprintln(wr)
}
}
c = c.Active
}
scommands := cmd.sortedVisibleCommands()
if len(scommands) > 0 {
maxnamelen := maxCommandLength(scommands)
fmt.Fprintln(wr)
fmt.Fprintln(wr, "Available commands:")
for _, c := range scommands {
fmt.Fprintf(wr, " %s", c.Name)
if len(c.ShortDescription) > 0 {
pad := strings.Repeat(" ", maxnamelen-len(c.Name))
fmt.Fprintf(wr, "%s %s", pad, c.ShortDescription)
if len(c.Aliases) > 0 {
fmt.Fprintf(wr, " (aliases: %s)", strings.Join(c.Aliases, ", "))
}
}
fmt.Fprintln(wr)
}
}
wr.Flush()
}

597
vendor/github.com/jessevdk/go-flags/ini.go generated vendored Normal file
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@ -0,0 +1,597 @@
package flags
import (
"bufio"
"fmt"
"io"
"os"
"reflect"
"sort"
"strconv"
"strings"
)
// IniError contains location information on where an error occurred.
type IniError struct {
// The error message.
Message string
// The filename of the file in which the error occurred.
File string
// The line number at which the error occurred.
LineNumber uint
}
// Error provides a "file:line: message" formatted message of the ini error.
func (x *IniError) Error() string {
return fmt.Sprintf(
"%s:%d: %s",
x.File,
x.LineNumber,
x.Message,
)
}
// IniOptions for writing
type IniOptions uint
const (
// IniNone indicates no options.
IniNone IniOptions = 0
// IniIncludeDefaults indicates that default values should be written.
IniIncludeDefaults = 1 << iota
// IniCommentDefaults indicates that if IniIncludeDefaults is used
// options with default values are written but commented out.
IniCommentDefaults
// IniIncludeComments indicates that comments containing the description
// of an option should be written.
IniIncludeComments
// IniDefault provides a default set of options.
IniDefault = IniIncludeComments
)
// IniParser is a utility to read and write flags options from and to ini
// formatted strings.
type IniParser struct {
ParseAsDefaults bool // override default flags
parser *Parser
}
type iniValue struct {
Name string
Value string
Quoted bool
LineNumber uint
}
type iniSection []iniValue
type ini struct {
File string
Sections map[string]iniSection
}
// NewIniParser creates a new ini parser for a given Parser.
func NewIniParser(p *Parser) *IniParser {
return &IniParser{
parser: p,
}
}
// IniParse is a convenience function to parse command line options with default
// settings from an ini formatted file. The provided data is a pointer to a struct
// representing the default option group (named "Application Options"). For
// more control, use flags.NewParser.
func IniParse(filename string, data interface{}) error {
p := NewParser(data, Default)
return NewIniParser(p).ParseFile(filename)
}
// ParseFile parses flags from an ini formatted file. See Parse for more
// information on the ini file format. The returned errors can be of the type
// flags.Error or flags.IniError.
func (i *IniParser) ParseFile(filename string) error {
ini, err := readIniFromFile(filename)
if err != nil {
return err
}
return i.parse(ini)
}
// Parse parses flags from an ini format. You can use ParseFile as a
// convenience function to parse from a filename instead of a general
// io.Reader.
//
// The format of the ini file is as follows:
//
// [Option group name]
// option = value
//
// Each section in the ini file represents an option group or command in the
// flags parser. The default flags parser option group (i.e. when using
// flags.Parse) is named 'Application Options'. The ini option name is matched
// in the following order:
//
// 1. Compared to the ini-name tag on the option struct field (if present)
// 2. Compared to the struct field name
// 3. Compared to the option long name (if present)
// 4. Compared to the option short name (if present)
//
// Sections for nested groups and commands can be addressed using a dot `.'
// namespacing notation (i.e [subcommand.Options]). Group section names are
// matched case insensitive.
//
// The returned errors can be of the type flags.Error or flags.IniError.
func (i *IniParser) Parse(reader io.Reader) error {
ini, err := readIni(reader, "")
if err != nil {
return err
}
return i.parse(ini)
}
// WriteFile writes the flags as ini format into a file. See Write
// for more information. The returned error occurs when the specified file
// could not be opened for writing.
func (i *IniParser) WriteFile(filename string, options IniOptions) error {
return writeIniToFile(i, filename, options)
}
// Write writes the current values of all the flags to an ini format.
// See Parse for more information on the ini file format. You typically
// call this only after settings have been parsed since the default values of each
// option are stored just before parsing the flags (this is only relevant when
// IniIncludeDefaults is _not_ set in options).
func (i *IniParser) Write(writer io.Writer, options IniOptions) {
writeIni(i, writer, options)
}
func readFullLine(reader *bufio.Reader) (string, error) {
var line []byte
for {
l, more, err := reader.ReadLine()
if err != nil {
return "", err
}
if line == nil && !more {
return string(l), nil
}
line = append(line, l...)
if !more {
break
}
}
return string(line), nil
}
func optionIniName(option *Option) string {
name := option.tag.Get("_read-ini-name")
if len(name) != 0 {
return name
}
name = option.tag.Get("ini-name")
if len(name) != 0 {
return name
}
return option.field.Name
}
func writeGroupIni(cmd *Command, group *Group, namespace string, writer io.Writer, options IniOptions) {
var sname string
if len(namespace) != 0 {
sname = namespace
}
if cmd.Group != group && len(group.ShortDescription) != 0 {
if len(sname) != 0 {
sname += "."
}
sname += group.ShortDescription
}
sectionwritten := false
comments := (options & IniIncludeComments) != IniNone
for _, option := range group.options {
if option.isFunc() || option.Hidden {
continue
}
if len(option.tag.Get("no-ini")) != 0 {
continue
}
val := option.value
if (options&IniIncludeDefaults) == IniNone && option.valueIsDefault() {
continue
}
if !sectionwritten {
fmt.Fprintf(writer, "[%s]\n", sname)
sectionwritten = true
}
if comments && len(option.Description) != 0 {
fmt.Fprintf(writer, "; %s\n", option.Description)
}
oname := optionIniName(option)
commentOption := (options&(IniIncludeDefaults|IniCommentDefaults)) == IniIncludeDefaults|IniCommentDefaults && option.valueIsDefault()
kind := val.Type().Kind()
switch kind {
case reflect.Slice:
kind = val.Type().Elem().Kind()
if val.Len() == 0 {
writeOption(writer, oname, kind, "", "", true, option.iniQuote)
} else {
for idx := 0; idx < val.Len(); idx++ {
v, _ := convertToString(val.Index(idx), option.tag)
writeOption(writer, oname, kind, "", v, commentOption, option.iniQuote)
}
}
case reflect.Map:
kind = val.Type().Elem().Kind()
if val.Len() == 0 {
writeOption(writer, oname, kind, "", "", true, option.iniQuote)
} else {
mkeys := val.MapKeys()
keys := make([]string, len(val.MapKeys()))
kkmap := make(map[string]reflect.Value)
for i, k := range mkeys {
keys[i], _ = convertToString(k, option.tag)
kkmap[keys[i]] = k
}
sort.Strings(keys)
for _, k := range keys {
v, _ := convertToString(val.MapIndex(kkmap[k]), option.tag)
writeOption(writer, oname, kind, k, v, commentOption, option.iniQuote)
}
}
default:
v, _ := convertToString(val, option.tag)
writeOption(writer, oname, kind, "", v, commentOption, option.iniQuote)
}
if comments {
fmt.Fprintln(writer)
}
}
if sectionwritten && !comments {
fmt.Fprintln(writer)
}
}
func writeOption(writer io.Writer, optionName string, optionType reflect.Kind, optionKey string, optionValue string, commentOption bool, forceQuote bool) {
if forceQuote || (optionType == reflect.String && !isPrint(optionValue)) {
optionValue = strconv.Quote(optionValue)
}
comment := ""
if commentOption {
comment = "; "
}
fmt.Fprintf(writer, "%s%s =", comment, optionName)
if optionKey != "" {
fmt.Fprintf(writer, " %s:%s", optionKey, optionValue)
} else if optionValue != "" {
fmt.Fprintf(writer, " %s", optionValue)
}
fmt.Fprintln(writer)
}
func writeCommandIni(command *Command, namespace string, writer io.Writer, options IniOptions) {
command.eachGroup(func(group *Group) {
if !group.Hidden {
writeGroupIni(command, group, namespace, writer, options)
}
})
for _, c := range command.commands {
var nns string
if c.Hidden {
continue
}
if len(namespace) != 0 {
nns = c.Name + "." + nns
} else {
nns = c.Name
}
writeCommandIni(c, nns, writer, options)
}
}
func writeIni(parser *IniParser, writer io.Writer, options IniOptions) {
writeCommandIni(parser.parser.Command, "", writer, options)
}
func writeIniToFile(parser *IniParser, filename string, options IniOptions) error {
file, err := os.Create(filename)
if err != nil {
return err
}
defer file.Close()
writeIni(parser, file, options)
return nil
}
func readIniFromFile(filename string) (*ini, error) {
file, err := os.Open(filename)
if err != nil {
return nil, err
}
defer file.Close()
return readIni(file, filename)
}
func readIni(contents io.Reader, filename string) (*ini, error) {
ret := &ini{
File: filename,
Sections: make(map[string]iniSection),
}
reader := bufio.NewReader(contents)
// Empty global section
section := make(iniSection, 0, 10)
sectionname := ""
ret.Sections[sectionname] = section
var lineno uint
for {
line, err := readFullLine(reader)
if err == io.EOF {
break
} else if err != nil {
return nil, err
}
lineno++
line = strings.TrimSpace(line)
// Skip empty lines and lines starting with ; (comments)
if len(line) == 0 || line[0] == ';' || line[0] == '#' {
continue
}
if line[0] == '[' {
if line[0] != '[' || line[len(line)-1] != ']' {
return nil, &IniError{
Message: "malformed section header",
File: filename,
LineNumber: lineno,
}
}
name := strings.TrimSpace(line[1 : len(line)-1])
if len(name) == 0 {
return nil, &IniError{
Message: "empty section name",
File: filename,
LineNumber: lineno,
}
}
sectionname = name
section = ret.Sections[name]
if section == nil {
section = make(iniSection, 0, 10)
ret.Sections[name] = section
}
continue
}
// Parse option here
keyval := strings.SplitN(line, "=", 2)
if len(keyval) != 2 {
return nil, &IniError{
Message: fmt.Sprintf("malformed key=value (%s)", line),
File: filename,
LineNumber: lineno,
}
}
name := strings.TrimSpace(keyval[0])
value := strings.TrimSpace(keyval[1])
quoted := false
if len(value) != 0 && value[0] == '"' {
if v, err := strconv.Unquote(value); err == nil {
value = v
quoted = true
} else {
return nil, &IniError{
Message: err.Error(),
File: filename,
LineNumber: lineno,
}
}
}
section = append(section, iniValue{
Name: name,
Value: value,
Quoted: quoted,
LineNumber: lineno,
})
ret.Sections[sectionname] = section
}
return ret, nil
}
func (i *IniParser) matchingGroups(name string) []*Group {
if len(name) == 0 {
var ret []*Group
i.parser.eachGroup(func(g *Group) {
ret = append(ret, g)
})
return ret
}
g := i.parser.groupByName(name)
if g != nil {
return []*Group{g}
}
return nil
}
func (i *IniParser) parse(ini *ini) error {
p := i.parser
var quotesLookup = make(map[*Option]bool)
for name, section := range ini.Sections {
groups := i.matchingGroups(name)
if len(groups) == 0 {
return newErrorf(ErrUnknownGroup, "could not find option group `%s'", name)
}
for _, inival := range section {
var opt *Option
for _, group := range groups {
opt = group.optionByName(inival.Name, func(o *Option, n string) bool {
return strings.ToLower(o.tag.Get("ini-name")) == strings.ToLower(n)
})
if opt != nil && len(opt.tag.Get("no-ini")) != 0 {
opt = nil
}
if opt != nil {
break
}
}
if opt == nil {
if (p.Options & IgnoreUnknown) == None {
return &IniError{
Message: fmt.Sprintf("unknown option: %s", inival.Name),
File: ini.File,
LineNumber: inival.LineNumber,
}
}
continue
}
// ini value is ignored if override is set and
// value was previously set from non default
if i.ParseAsDefaults && !opt.isSetDefault {
continue
}
pval := &inival.Value
if !opt.canArgument() && len(inival.Value) == 0 {
pval = nil
} else {
if opt.value.Type().Kind() == reflect.Map {
parts := strings.SplitN(inival.Value, ":", 2)
// only handle unquoting
if len(parts) == 2 && parts[1][0] == '"' {
if v, err := strconv.Unquote(parts[1]); err == nil {
parts[1] = v
inival.Quoted = true
} else {
return &IniError{
Message: err.Error(),
File: ini.File,
LineNumber: inival.LineNumber,
}
}
s := parts[0] + ":" + parts[1]
pval = &s
}
}
}
if err := opt.set(pval); err != nil {
return &IniError{
Message: err.Error(),
File: ini.File,
LineNumber: inival.LineNumber,
}
}
// either all INI values are quoted or only values who need quoting
if _, ok := quotesLookup[opt]; !inival.Quoted || !ok {
quotesLookup[opt] = inival.Quoted
}
opt.tag.Set("_read-ini-name", inival.Name)
}
}
for opt, quoted := range quotesLookup {
opt.iniQuote = quoted
}
return nil
}

205
vendor/github.com/jessevdk/go-flags/man.go generated vendored Normal file
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package flags
import (
"fmt"
"io"
"runtime"
"strings"
"time"
)
func manQuote(s string) string {
return strings.Replace(s, "\\", "\\\\", -1)
}
func formatForMan(wr io.Writer, s string) {
for {
idx := strings.IndexRune(s, '`')
if idx < 0 {
fmt.Fprintf(wr, "%s", manQuote(s))
break
}
fmt.Fprintf(wr, "%s", manQuote(s[:idx]))
s = s[idx+1:]
idx = strings.IndexRune(s, '\'')
if idx < 0 {
fmt.Fprintf(wr, "%s", manQuote(s))
break
}
fmt.Fprintf(wr, "\\fB%s\\fP", manQuote(s[:idx]))
s = s[idx+1:]
}
}
func writeManPageOptions(wr io.Writer, grp *Group) {
grp.eachGroup(func(group *Group) {
if group.Hidden || len(group.options) == 0 {
return
}
// If the parent (grp) has any subgroups, display their descriptions as
// subsection headers similar to the output of --help.
if group.ShortDescription != "" && len(grp.groups) > 0 {
fmt.Fprintf(wr, ".SS %s\n", group.ShortDescription)
if group.LongDescription != "" {
formatForMan(wr, group.LongDescription)
fmt.Fprintln(wr, "")
}
}
for _, opt := range group.options {
if !opt.canCli() || opt.Hidden {
continue
}
fmt.Fprintln(wr, ".TP")
fmt.Fprintf(wr, "\\fB")
if opt.ShortName != 0 {
fmt.Fprintf(wr, "\\fB\\-%c\\fR", opt.ShortName)
}
if len(opt.LongName) != 0 {
if opt.ShortName != 0 {
fmt.Fprintf(wr, ", ")
}
fmt.Fprintf(wr, "\\fB\\-\\-%s\\fR", manQuote(opt.LongNameWithNamespace()))
}
if len(opt.ValueName) != 0 || opt.OptionalArgument {
if opt.OptionalArgument {
fmt.Fprintf(wr, " [\\fI%s=%s\\fR]", manQuote(opt.ValueName), manQuote(strings.Join(quoteV(opt.OptionalValue), ", ")))
} else {
fmt.Fprintf(wr, " \\fI%s\\fR", manQuote(opt.ValueName))
}
}
if len(opt.Default) != 0 {
fmt.Fprintf(wr, " <default: \\fI%s\\fR>", manQuote(strings.Join(quoteV(opt.Default), ", ")))
} else if len(opt.EnvDefaultKey) != 0 {
if runtime.GOOS == "windows" {
fmt.Fprintf(wr, " <default: \\fI%%%s%%\\fR>", manQuote(opt.EnvDefaultKey))
} else {
fmt.Fprintf(wr, " <default: \\fI$%s\\fR>", manQuote(opt.EnvDefaultKey))
}
}
if opt.Required {
fmt.Fprintf(wr, " (\\fIrequired\\fR)")
}
fmt.Fprintln(wr, "\\fP")
if len(opt.Description) != 0 {
formatForMan(wr, opt.Description)
fmt.Fprintln(wr, "")
}
}
})
}
func writeManPageSubcommands(wr io.Writer, name string, root *Command) {
commands := root.sortedVisibleCommands()
for _, c := range commands {
var nn string
if c.Hidden {
continue
}
if len(name) != 0 {
nn = name + " " + c.Name
} else {
nn = c.Name
}
writeManPageCommand(wr, nn, root, c)
}
}
func writeManPageCommand(wr io.Writer, name string, root *Command, command *Command) {
fmt.Fprintf(wr, ".SS %s\n", name)
fmt.Fprintln(wr, command.ShortDescription)
if len(command.LongDescription) > 0 {
fmt.Fprintln(wr, "")
cmdstart := fmt.Sprintf("The %s command", manQuote(command.Name))
if strings.HasPrefix(command.LongDescription, cmdstart) {
fmt.Fprintf(wr, "The \\fI%s\\fP command", manQuote(command.Name))
formatForMan(wr, command.LongDescription[len(cmdstart):])
fmt.Fprintln(wr, "")
} else {
formatForMan(wr, command.LongDescription)
fmt.Fprintln(wr, "")
}
}
var usage string
if us, ok := command.data.(Usage); ok {
usage = us.Usage()
} else if command.hasCliOptions() {
usage = fmt.Sprintf("[%s-OPTIONS]", command.Name)
}
var pre string
if root.hasCliOptions() {
pre = fmt.Sprintf("%s [OPTIONS] %s", root.Name, command.Name)
} else {
pre = fmt.Sprintf("%s %s", root.Name, command.Name)
}
if len(usage) > 0 {
fmt.Fprintf(wr, "\n\\fBUsage\\fP: %s %s\n.TP\n", manQuote(pre), manQuote(usage))
}
if len(command.Aliases) > 0 {
fmt.Fprintf(wr, "\n\\fBAliases\\fP: %s\n\n", manQuote(strings.Join(command.Aliases, ", ")))
}
writeManPageOptions(wr, command.Group)
writeManPageSubcommands(wr, name, command)
}
// WriteManPage writes a basic man page in groff format to the specified
// writer.
func (p *Parser) WriteManPage(wr io.Writer) {
t := time.Now()
fmt.Fprintf(wr, ".TH %s 1 \"%s\"\n", manQuote(p.Name), t.Format("2 January 2006"))
fmt.Fprintln(wr, ".SH NAME")
fmt.Fprintf(wr, "%s \\- %s\n", manQuote(p.Name), manQuote(p.ShortDescription))
fmt.Fprintln(wr, ".SH SYNOPSIS")
usage := p.Usage
if len(usage) == 0 {
usage = "[OPTIONS]"
}
fmt.Fprintf(wr, "\\fB%s\\fP %s\n", manQuote(p.Name), manQuote(usage))
fmt.Fprintln(wr, ".SH DESCRIPTION")
formatForMan(wr, p.LongDescription)
fmt.Fprintln(wr, "")
fmt.Fprintln(wr, ".SH OPTIONS")
writeManPageOptions(wr, p.Command.Group)
if len(p.visibleCommands()) > 0 {
fmt.Fprintln(wr, ".SH COMMANDS")
writeManPageSubcommands(wr, "", p.Command)
}
}

140
vendor/github.com/jessevdk/go-flags/multitag.go generated vendored Normal file
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@ -0,0 +1,140 @@
package flags
import (
"strconv"
)
type multiTag struct {
value string
cache map[string][]string
}
func newMultiTag(v string) multiTag {
return multiTag{
value: v,
}
}
func (x *multiTag) scan() (map[string][]string, error) {
v := x.value
ret := make(map[string][]string)
// This is mostly copied from reflect.StructTag.Get
for v != "" {
i := 0
// Skip whitespace
for i < len(v) && v[i] == ' ' {
i++
}
v = v[i:]
if v == "" {
break
}
// Scan to colon to find key
i = 0
for i < len(v) && v[i] != ' ' && v[i] != ':' && v[i] != '"' {
i++
}
if i >= len(v) {
return nil, newErrorf(ErrTag, "expected `:' after key name, but got end of tag (in `%v`)", x.value)
}
if v[i] != ':' {
return nil, newErrorf(ErrTag, "expected `:' after key name, but got `%v' (in `%v`)", v[i], x.value)
}
if i+1 >= len(v) {
return nil, newErrorf(ErrTag, "expected `\"' to start tag value at end of tag (in `%v`)", x.value)
}
if v[i+1] != '"' {
return nil, newErrorf(ErrTag, "expected `\"' to start tag value, but got `%v' (in `%v`)", v[i+1], x.value)
}
name := v[:i]
v = v[i+1:]
// Scan quoted string to find value
i = 1
for i < len(v) && v[i] != '"' {
if v[i] == '\n' {
return nil, newErrorf(ErrTag, "unexpected newline in tag value `%v' (in `%v`)", name, x.value)
}
if v[i] == '\\' {
i++
}
i++
}
if i >= len(v) {
return nil, newErrorf(ErrTag, "expected end of tag value `\"' at end of tag (in `%v`)", x.value)
}
val, err := strconv.Unquote(v[:i+1])
if err != nil {
return nil, newErrorf(ErrTag, "Malformed value of tag `%v:%v` => %v (in `%v`)", name, v[:i+1], err, x.value)
}
v = v[i+1:]
ret[name] = append(ret[name], val)
}
return ret, nil
}
func (x *multiTag) Parse() error {
vals, err := x.scan()
x.cache = vals
return err
}
func (x *multiTag) cached() map[string][]string {
if x.cache == nil {
cache, _ := x.scan()
if cache == nil {
cache = make(map[string][]string)
}
x.cache = cache
}
return x.cache
}
func (x *multiTag) Get(key string) string {
c := x.cached()
if v, ok := c[key]; ok {
return v[len(v)-1]
}
return ""
}
func (x *multiTag) GetMany(key string) []string {
c := x.cached()
return c[key]
}
func (x *multiTag) Set(key string, value string) {
c := x.cached()
c[key] = []string{value}
}
func (x *multiTag) SetMany(key string, value []string) {
c := x.cached()
c[key] = value
}

459
vendor/github.com/jessevdk/go-flags/option.go generated vendored Normal file
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@ -0,0 +1,459 @@
package flags
import (
"bytes"
"fmt"
"os"
"reflect"
"strings"
"unicode/utf8"
)
// Option flag information. Contains a description of the option, short and
// long name as well as a default value and whether an argument for this
// flag is optional.
type Option struct {
// The description of the option flag. This description is shown
// automatically in the built-in help.
Description string
// The short name of the option (a single character). If not 0, the
// option flag can be 'activated' using -<ShortName>. Either ShortName
// or LongName needs to be non-empty.
ShortName rune
// The long name of the option. If not "", the option flag can be
// activated using --<LongName>. Either ShortName or LongName needs
// to be non-empty.
LongName string
// The default value of the option.
Default []string
// The optional environment default value key name.
EnvDefaultKey string
// The optional delimiter string for EnvDefaultKey values.
EnvDefaultDelim string
// If true, specifies that the argument to an option flag is optional.
// When no argument to the flag is specified on the command line, the
// value of OptionalValue will be set in the field this option represents.
// This is only valid for non-boolean options.
OptionalArgument bool
// The optional value of the option. The optional value is used when
// the option flag is marked as having an OptionalArgument. This means
// that when the flag is specified, but no option argument is given,
// the value of the field this option represents will be set to
// OptionalValue. This is only valid for non-boolean options.
OptionalValue []string
// If true, the option _must_ be specified on the command line. If the
// option is not specified, the parser will generate an ErrRequired type
// error.
Required bool
// A name for the value of an option shown in the Help as --flag [ValueName]
ValueName string
// A mask value to show in the help instead of the default value. This
// is useful for hiding sensitive information in the help, such as
// passwords.
DefaultMask string
// If non empty, only a certain set of values is allowed for an option.
Choices []string
// If true, the option is not displayed in the help or man page
Hidden bool
// The group which the option belongs to
group *Group
// The struct field which the option represents.
field reflect.StructField
// The struct field value which the option represents.
value reflect.Value
// Determines if the option will be always quoted in the INI output
iniQuote bool
tag multiTag
isSet bool
isSetDefault bool
preventDefault bool
defaultLiteral string
}
// LongNameWithNamespace returns the option's long name with the group namespaces
// prepended by walking up the option's group tree. Namespaces and the long name
// itself are separated by the parser's namespace delimiter. If the long name is
// empty an empty string is returned.
func (option *Option) LongNameWithNamespace() string {
if len(option.LongName) == 0 {
return ""
}
// fetch the namespace delimiter from the parser which is always at the
// end of the group hierarchy
namespaceDelimiter := ""
g := option.group
for {
if p, ok := g.parent.(*Parser); ok {
namespaceDelimiter = p.NamespaceDelimiter
break
}
switch i := g.parent.(type) {
case *Command:
g = i.Group
case *Group:
g = i
}
}
// concatenate long name with namespace
longName := option.LongName
g = option.group
for g != nil {
if g.Namespace != "" {
longName = g.Namespace + namespaceDelimiter + longName
}
switch i := g.parent.(type) {
case *Command:
g = i.Group
case *Group:
g = i
case *Parser:
g = nil
}
}
return longName
}
// String converts an option to a human friendly readable string describing the
// option.
func (option *Option) String() string {
var s string
var short string
if option.ShortName != 0 {
data := make([]byte, utf8.RuneLen(option.ShortName))
utf8.EncodeRune(data, option.ShortName)
short = string(data)
if len(option.LongName) != 0 {
s = fmt.Sprintf("%s%s, %s%s",
string(defaultShortOptDelimiter), short,
defaultLongOptDelimiter, option.LongNameWithNamespace())
} else {
s = fmt.Sprintf("%s%s", string(defaultShortOptDelimiter), short)
}
} else if len(option.LongName) != 0 {
s = fmt.Sprintf("%s%s", defaultLongOptDelimiter, option.LongNameWithNamespace())
}
return s
}
// Value returns the option value as an interface{}.
func (option *Option) Value() interface{} {
return option.value.Interface()
}
// Field returns the reflect struct field of the option.
func (option *Option) Field() reflect.StructField {
return option.field
}
// IsSet returns true if option has been set
func (option *Option) IsSet() bool {
return option.isSet
}
// IsSetDefault returns true if option has been set via the default option tag
func (option *Option) IsSetDefault() bool {
return option.isSetDefault
}
// Set the value of an option to the specified value. An error will be returned
// if the specified value could not be converted to the corresponding option
// value type.
func (option *Option) set(value *string) error {
kind := option.value.Type().Kind()
if (kind == reflect.Map || kind == reflect.Slice) && !option.isSet {
option.empty()
}
option.isSet = true
option.preventDefault = true
if len(option.Choices) != 0 {
found := false
for _, choice := range option.Choices {
if choice == *value {
found = true
break
}
}
if !found {
allowed := strings.Join(option.Choices[0:len(option.Choices)-1], ", ")
if len(option.Choices) > 1 {
allowed += " or " + option.Choices[len(option.Choices)-1]
}
return newErrorf(ErrInvalidChoice,
"Invalid value `%s' for option `%s'. Allowed values are: %s",
*value, option, allowed)
}
}
if option.isFunc() {
return option.call(value)
} else if value != nil {
return convert(*value, option.value, option.tag)
}
return convert("", option.value, option.tag)
}
func (option *Option) canCli() bool {
return option.ShortName != 0 || len(option.LongName) != 0
}
func (option *Option) canArgument() bool {
if u := option.isUnmarshaler(); u != nil {
return true
}
return !option.isBool()
}
func (option *Option) emptyValue() reflect.Value {
tp := option.value.Type()
if tp.Kind() == reflect.Map {
return reflect.MakeMap(tp)
}
return reflect.Zero(tp)
}
func (option *Option) empty() {
if !option.isFunc() {
option.value.Set(option.emptyValue())
}
}
func (option *Option) clearDefault() {
usedDefault := option.Default
if envKey := option.EnvDefaultKey; envKey != "" {
if value, ok := os.LookupEnv(envKey); ok {
if option.EnvDefaultDelim != "" {
usedDefault = strings.Split(value,
option.EnvDefaultDelim)
} else {
usedDefault = []string{value}
}
}
}
option.isSetDefault = true
if len(usedDefault) > 0 {
option.empty()
for _, d := range usedDefault {
option.set(&d)
option.isSetDefault = true
}
} else {
tp := option.value.Type()
switch tp.Kind() {
case reflect.Map:
if option.value.IsNil() {
option.empty()
}
case reflect.Slice:
if option.value.IsNil() {
option.empty()
}
}
}
}
func (option *Option) valueIsDefault() bool {
// Check if the value of the option corresponds to its
// default value
emptyval := option.emptyValue()
checkvalptr := reflect.New(emptyval.Type())
checkval := reflect.Indirect(checkvalptr)
checkval.Set(emptyval)
if len(option.Default) != 0 {
for _, v := range option.Default {
convert(v, checkval, option.tag)
}
}
return reflect.DeepEqual(option.value.Interface(), checkval.Interface())
}
func (option *Option) isUnmarshaler() Unmarshaler {
v := option.value
for {
if !v.CanInterface() {
break
}
i := v.Interface()
if u, ok := i.(Unmarshaler); ok {
return u
}
if !v.CanAddr() {
break
}
v = v.Addr()
}
return nil
}
func (option *Option) isBool() bool {
tp := option.value.Type()
for {
switch tp.Kind() {
case reflect.Slice, reflect.Ptr:
tp = tp.Elem()
case reflect.Bool:
return true
case reflect.Func:
return tp.NumIn() == 0
default:
return false
}
}
}
func (option *Option) isSignedNumber() bool {
tp := option.value.Type()
for {
switch tp.Kind() {
case reflect.Slice, reflect.Ptr:
tp = tp.Elem()
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Float32, reflect.Float64:
return true
default:
return false
}
}
}
func (option *Option) isFunc() bool {
return option.value.Type().Kind() == reflect.Func
}
func (option *Option) call(value *string) error {
var retval []reflect.Value
if value == nil {
retval = option.value.Call(nil)
} else {
tp := option.value.Type().In(0)
val := reflect.New(tp)
val = reflect.Indirect(val)
if err := convert(*value, val, option.tag); err != nil {
return err
}
retval = option.value.Call([]reflect.Value{val})
}
if len(retval) == 1 && retval[0].Type() == reflect.TypeOf((*error)(nil)).Elem() {
if retval[0].Interface() == nil {
return nil
}
return retval[0].Interface().(error)
}
return nil
}
func (option *Option) updateDefaultLiteral() {
defs := option.Default
def := ""
if len(defs) == 0 && option.canArgument() {
var showdef bool
switch option.field.Type.Kind() {
case reflect.Func, reflect.Ptr:
showdef = !option.value.IsNil()
case reflect.Slice, reflect.String, reflect.Array:
showdef = option.value.Len() > 0
case reflect.Map:
showdef = !option.value.IsNil() && option.value.Len() > 0
default:
zeroval := reflect.Zero(option.field.Type)
showdef = !reflect.DeepEqual(zeroval.Interface(), option.value.Interface())
}
if showdef {
def, _ = convertToString(option.value, option.tag)
}
} else if len(defs) != 0 {
l := len(defs) - 1
for i := 0; i < l; i++ {
def += quoteIfNeeded(defs[i]) + ", "
}
def += quoteIfNeeded(defs[l])
}
option.defaultLiteral = def
}
func (option *Option) shortAndLongName() string {
ret := &bytes.Buffer{}
if option.ShortName != 0 {
ret.WriteRune(defaultShortOptDelimiter)
ret.WriteRune(option.ShortName)
}
if len(option.LongName) != 0 {
if option.ShortName != 0 {
ret.WriteRune('/')
}
ret.WriteString(option.LongName)
}
return ret.String()
}

67
vendor/github.com/jessevdk/go-flags/optstyle_other.go generated vendored Normal file
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// +build !windows forceposix
package flags
import (
"strings"
)
const (
defaultShortOptDelimiter = '-'
defaultLongOptDelimiter = "--"
defaultNameArgDelimiter = '='
)
func argumentStartsOption(arg string) bool {
return len(arg) > 0 && arg[0] == '-'
}
func argumentIsOption(arg string) bool {
if len(arg) > 1 && arg[0] == '-' && arg[1] != '-' {
return true
}
if len(arg) > 2 && arg[0] == '-' && arg[1] == '-' && arg[2] != '-' {
return true
}
return false
}
// stripOptionPrefix returns the option without the prefix and whether or
// not the option is a long option or not.
func stripOptionPrefix(optname string) (prefix string, name string, islong bool) {
if strings.HasPrefix(optname, "--") {
return "--", optname[2:], true
} else if strings.HasPrefix(optname, "-") {
return "-", optname[1:], false
}
return "", optname, false
}
// splitOption attempts to split the passed option into a name and an argument.
// When there is no argument specified, nil will be returned for it.
func splitOption(prefix string, option string, islong bool) (string, string, *string) {
pos := strings.Index(option, "=")
if (islong && pos >= 0) || (!islong && pos == 1) {
rest := option[pos+1:]
return option[:pos], "=", &rest
}
return option, "", nil
}
// addHelpGroup adds a new group that contains default help parameters.
func (c *Command) addHelpGroup(showHelp func() error) *Group {
var help struct {
ShowHelp func() error `short:"h" long:"help" description:"Show this help message"`
}
help.ShowHelp = showHelp
ret, _ := c.AddGroup("Help Options", "", &help)
ret.isBuiltinHelp = true
return ret
}

108
vendor/github.com/jessevdk/go-flags/optstyle_windows.go generated vendored Normal file
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// +build !forceposix
package flags
import (
"strings"
)
// Windows uses a front slash for both short and long options. Also it uses
// a colon for name/argument delimter.
const (
defaultShortOptDelimiter = '/'
defaultLongOptDelimiter = "/"
defaultNameArgDelimiter = ':'
)
func argumentStartsOption(arg string) bool {
return len(arg) > 0 && (arg[0] == '-' || arg[0] == '/')
}
func argumentIsOption(arg string) bool {
// Windows-style options allow front slash for the option
// delimiter.
if len(arg) > 1 && arg[0] == '/' {
return true
}
if len(arg) > 1 && arg[0] == '-' && arg[1] != '-' {
return true
}
if len(arg) > 2 && arg[0] == '-' && arg[1] == '-' && arg[2] != '-' {
return true
}
return false
}
// stripOptionPrefix returns the option without the prefix and whether or
// not the option is a long option or not.
func stripOptionPrefix(optname string) (prefix string, name string, islong bool) {
// Determine if the argument is a long option or not. Windows
// typically supports both long and short options with a single
// front slash as the option delimiter, so handle this situation
// nicely.
possplit := 0
if strings.HasPrefix(optname, "--") {
possplit = 2
islong = true
} else if strings.HasPrefix(optname, "-") {
possplit = 1
islong = false
} else if strings.HasPrefix(optname, "/") {
possplit = 1
islong = len(optname) > 2
}
return optname[:possplit], optname[possplit:], islong
}
// splitOption attempts to split the passed option into a name and an argument.
// When there is no argument specified, nil will be returned for it.
func splitOption(prefix string, option string, islong bool) (string, string, *string) {
if len(option) == 0 {
return option, "", nil
}
// Windows typically uses a colon for the option name and argument
// delimiter while POSIX typically uses an equals. Support both styles,
// but don't allow the two to be mixed. That is to say /foo:bar and
// --foo=bar are acceptable, but /foo=bar and --foo:bar are not.
var pos int
var sp string
if prefix == "/" {
sp = ":"
pos = strings.Index(option, sp)
} else if len(prefix) > 0 {
sp = "="
pos = strings.Index(option, sp)
}
if (islong && pos >= 0) || (!islong && pos == 1) {
rest := option[pos+1:]
return option[:pos], sp, &rest
}
return option, "", nil
}
// addHelpGroup adds a new group that contains default help parameters.
func (c *Command) addHelpGroup(showHelp func() error) *Group {
// Windows CLI applications typically use /? for help, so make both
// that available as well as the POSIX style h and help.
var help struct {
ShowHelpWindows func() error `short:"?" description:"Show this help message"`
ShowHelpPosix func() error `short:"h" long:"help" description:"Show this help message"`
}
help.ShowHelpWindows = showHelp
help.ShowHelpPosix = showHelp
ret, _ := c.AddGroup("Help Options", "", &help)
ret.isBuiltinHelp = true
return ret
}

700
vendor/github.com/jessevdk/go-flags/parser.go generated vendored Normal file
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// Copyright 2012 Jesse van den Kieboom. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package flags
import (
"bytes"
"fmt"
"os"
"path"
"sort"
"strings"
"unicode/utf8"
)
// A Parser provides command line option parsing. It can contain several
// option groups each with their own set of options.
type Parser struct {
// Embedded, see Command for more information
*Command
// A usage string to be displayed in the help message.
Usage string
// Option flags changing the behavior of the parser.
Options Options
// NamespaceDelimiter separates group namespaces and option long names
NamespaceDelimiter string
// UnknownOptionsHandler is a function which gets called when the parser
// encounters an unknown option. The function receives the unknown option
// name, a SplitArgument which specifies its value if set with an argument
// separator, and the remaining command line arguments.
// It should return a new list of remaining arguments to continue parsing,
// or an error to indicate a parse failure.
UnknownOptionHandler func(option string, arg SplitArgument, args []string) ([]string, error)
// CompletionHandler is a function gets called to handle the completion of
// items. By default, the items are printed and the application is exited.
// You can override this default behavior by specifying a custom CompletionHandler.
CompletionHandler func(items []Completion)
// CommandHandler is a function that gets called to handle execution of a
// command. By default, the command will simply be executed. This can be
// overridden to perform certain actions (such as applying global flags)
// just before the command is executed. Note that if you override the
// handler it is your responsibility to call the command.Execute function.
//
// The command passed into CommandHandler may be nil in case there is no
// command to be executed when parsing has finished.
CommandHandler func(command Commander, args []string) error
internalError error
}
// SplitArgument represents the argument value of an option that was passed using
// an argument separator.
type SplitArgument interface {
// String returns the option's value as a string, and a boolean indicating
// if the option was present.
Value() (string, bool)
}
type strArgument struct {
value *string
}
func (s strArgument) Value() (string, bool) {
if s.value == nil {
return "", false
}
return *s.value, true
}
// Options provides parser options that change the behavior of the option
// parser.
type Options uint
const (
// None indicates no options.
None Options = 0
// HelpFlag adds a default Help Options group to the parser containing
// -h and --help options. When either -h or --help is specified on the
// command line, the parser will return the special error of type
// ErrHelp. When PrintErrors is also specified, then the help message
// will also be automatically printed to os.Stdout.
HelpFlag = 1 << iota
// PassDoubleDash passes all arguments after a double dash, --, as
// remaining command line arguments (i.e. they will not be parsed for
// flags).
PassDoubleDash
// IgnoreUnknown ignores any unknown options and passes them as
// remaining command line arguments instead of generating an error.
IgnoreUnknown
// PrintErrors prints any errors which occurred during parsing to
// os.Stderr. In the special case of ErrHelp, the message will be printed
// to os.Stdout.
PrintErrors
// PassAfterNonOption passes all arguments after the first non option
// as remaining command line arguments. This is equivalent to strict
// POSIX processing.
PassAfterNonOption
// Default is a convenient default set of options which should cover
// most of the uses of the flags package.
Default = HelpFlag | PrintErrors | PassDoubleDash
)
type parseState struct {
arg string
args []string
retargs []string
positional []*Arg
err error
command *Command
lookup lookup
}
// Parse is a convenience function to parse command line options with default
// settings. The provided data is a pointer to a struct representing the
// default option group (named "Application Options"). For more control, use
// flags.NewParser.
func Parse(data interface{}) ([]string, error) {
return NewParser(data, Default).Parse()
}
// ParseArgs is a convenience function to parse command line options with default
// settings. The provided data is a pointer to a struct representing the
// default option group (named "Application Options"). The args argument is
// the list of command line arguments to parse. If you just want to parse the
// default program command line arguments (i.e. os.Args), then use flags.Parse
// instead. For more control, use flags.NewParser.
func ParseArgs(data interface{}, args []string) ([]string, error) {
return NewParser(data, Default).ParseArgs(args)
}
// NewParser creates a new parser. It uses os.Args[0] as the application
// name and then calls Parser.NewNamedParser (see Parser.NewNamedParser for
// more details). The provided data is a pointer to a struct representing the
// default option group (named "Application Options"), or nil if the default
// group should not be added. The options parameter specifies a set of options
// for the parser.
func NewParser(data interface{}, options Options) *Parser {
p := NewNamedParser(path.Base(os.Args[0]), options)
if data != nil {
g, err := p.AddGroup("Application Options", "", data)
if err == nil {
g.parent = p
}
p.internalError = err
}
return p
}
// NewNamedParser creates a new parser. The appname is used to display the
// executable name in the built-in help message. Option groups and commands can
// be added to this parser by using AddGroup and AddCommand.
func NewNamedParser(appname string, options Options) *Parser {
p := &Parser{
Command: newCommand(appname, "", "", nil),
Options: options,
NamespaceDelimiter: ".",
}
p.Command.parent = p
return p
}
// Parse parses the command line arguments from os.Args using Parser.ParseArgs.
// For more detailed information see ParseArgs.
func (p *Parser) Parse() ([]string, error) {
return p.ParseArgs(os.Args[1:])
}
// ParseArgs parses the command line arguments according to the option groups that
// were added to the parser. On successful parsing of the arguments, the
// remaining, non-option, arguments (if any) are returned. The returned error
// indicates a parsing error and can be used with PrintError to display
// contextual information on where the error occurred exactly.
//
// When the common help group has been added (AddHelp) and either -h or --help
// was specified in the command line arguments, a help message will be
// automatically printed if the PrintErrors option is enabled.
// Furthermore, the special error type ErrHelp is returned.
// It is up to the caller to exit the program if so desired.
func (p *Parser) ParseArgs(args []string) ([]string, error) {
if p.internalError != nil {
return nil, p.internalError
}
p.eachOption(func(c *Command, g *Group, option *Option) {
option.isSet = false
option.isSetDefault = false
option.updateDefaultLiteral()
})
// Add built-in help group to all commands if necessary
if (p.Options & HelpFlag) != None {
p.addHelpGroups(p.showBuiltinHelp)
}
compval := os.Getenv("GO_FLAGS_COMPLETION")
if len(compval) != 0 {
comp := &completion{parser: p}
items := comp.complete(args)
if p.CompletionHandler != nil {
p.CompletionHandler(items)
} else {
comp.print(items, compval == "verbose")
os.Exit(0)
}
return nil, nil
}
s := &parseState{
args: args,
retargs: make([]string, 0, len(args)),
}
p.fillParseState(s)
for !s.eof() {
arg := s.pop()
// When PassDoubleDash is set and we encounter a --, then
// simply append all the rest as arguments and break out
if (p.Options&PassDoubleDash) != None && arg == "--" {
s.addArgs(s.args...)
break
}
if !argumentIsOption(arg) {
// Note: this also sets s.err, so we can just check for
// nil here and use s.err later
if p.parseNonOption(s) != nil {
break
}
continue
}
var err error
prefix, optname, islong := stripOptionPrefix(arg)
optname, _, argument := splitOption(prefix, optname, islong)
if islong {
err = p.parseLong(s, optname, argument)
} else {
err = p.parseShort(s, optname, argument)
}
if err != nil {
ignoreUnknown := (p.Options & IgnoreUnknown) != None
parseErr := wrapError(err)
if parseErr.Type != ErrUnknownFlag || (!ignoreUnknown && p.UnknownOptionHandler == nil) {
s.err = parseErr
break
}
if ignoreUnknown {
s.addArgs(arg)
} else if p.UnknownOptionHandler != nil {
modifiedArgs, err := p.UnknownOptionHandler(optname, strArgument{argument}, s.args)
if err != nil {
s.err = err
break
}
s.args = modifiedArgs
}
}
}
if s.err == nil {
p.eachOption(func(c *Command, g *Group, option *Option) {
if option.preventDefault {
return
}
option.clearDefault()
})
s.checkRequired(p)
}
var reterr error
if s.err != nil {
reterr = s.err
} else if len(s.command.commands) != 0 && !s.command.SubcommandsOptional {
reterr = s.estimateCommand()
} else if cmd, ok := s.command.data.(Commander); ok {
if p.CommandHandler != nil {
reterr = p.CommandHandler(cmd, s.retargs)
} else {
reterr = cmd.Execute(s.retargs)
}
} else if p.CommandHandler != nil {
reterr = p.CommandHandler(nil, s.retargs)
}
if reterr != nil {
var retargs []string
if ourErr, ok := reterr.(*Error); !ok || ourErr.Type != ErrHelp {
retargs = append([]string{s.arg}, s.args...)
} else {
retargs = s.args
}
return retargs, p.printError(reterr)
}
return s.retargs, nil
}
func (p *parseState) eof() bool {
return len(p.args) == 0
}
func (p *parseState) pop() string {
if p.eof() {
return ""
}
p.arg = p.args[0]
p.args = p.args[1:]
return p.arg
}
func (p *parseState) peek() string {
if p.eof() {
return ""
}
return p.args[0]
}
func (p *parseState) checkRequired(parser *Parser) error {
c := parser.Command
var required []*Option
for c != nil {
c.eachGroup(func(g *Group) {
for _, option := range g.options {
if !option.isSet && option.Required {
required = append(required, option)
}
}
})
c = c.Active
}
if len(required) == 0 {
if len(p.positional) > 0 {
var reqnames []string
for _, arg := range p.positional {
argRequired := (!arg.isRemaining() && p.command.ArgsRequired) || arg.Required != -1 || arg.RequiredMaximum != -1
if !argRequired {
continue
}
if arg.isRemaining() {
if arg.value.Len() < arg.Required {
var arguments string
if arg.Required > 1 {
arguments = "arguments, but got only " + fmt.Sprintf("%d", arg.value.Len())
} else {
arguments = "argument"
}
reqnames = append(reqnames, "`"+arg.Name+" (at least "+fmt.Sprintf("%d", arg.Required)+" "+arguments+")`")
} else if arg.RequiredMaximum != -1 && arg.value.Len() > arg.RequiredMaximum {
if arg.RequiredMaximum == 0 {
reqnames = append(reqnames, "`"+arg.Name+" (zero arguments)`")
} else {
var arguments string
if arg.RequiredMaximum > 1 {
arguments = "arguments, but got " + fmt.Sprintf("%d", arg.value.Len())
} else {
arguments = "argument"
}
reqnames = append(reqnames, "`"+arg.Name+" (at most "+fmt.Sprintf("%d", arg.RequiredMaximum)+" "+arguments+")`")
}
}
} else {
reqnames = append(reqnames, "`"+arg.Name+"`")
}
}
if len(reqnames) == 0 {
return nil
}
var msg string
if len(reqnames) == 1 {
msg = fmt.Sprintf("the required argument %s was not provided", reqnames[0])
} else {
msg = fmt.Sprintf("the required arguments %s and %s were not provided",
strings.Join(reqnames[:len(reqnames)-1], ", "), reqnames[len(reqnames)-1])
}
p.err = newError(ErrRequired, msg)
return p.err
}
return nil
}
names := make([]string, 0, len(required))
for _, k := range required {
names = append(names, "`"+k.String()+"'")
}
sort.Strings(names)
var msg string
if len(names) == 1 {
msg = fmt.Sprintf("the required flag %s was not specified", names[0])
} else {
msg = fmt.Sprintf("the required flags %s and %s were not specified",
strings.Join(names[:len(names)-1], ", "), names[len(names)-1])
}
p.err = newError(ErrRequired, msg)
return p.err
}
func (p *parseState) estimateCommand() error {
commands := p.command.sortedVisibleCommands()
cmdnames := make([]string, len(commands))
for i, v := range commands {
cmdnames[i] = v.Name
}
var msg string
var errtype ErrorType
if len(p.retargs) != 0 {
c, l := closestChoice(p.retargs[0], cmdnames)
msg = fmt.Sprintf("Unknown command `%s'", p.retargs[0])
errtype = ErrUnknownCommand
if float32(l)/float32(len(c)) < 0.5 {
msg = fmt.Sprintf("%s, did you mean `%s'?", msg, c)
} else if len(cmdnames) == 1 {
msg = fmt.Sprintf("%s. You should use the %s command",
msg,
cmdnames[0])
} else if len(cmdnames) > 1 {
msg = fmt.Sprintf("%s. Please specify one command of: %s or %s",
msg,
strings.Join(cmdnames[:len(cmdnames)-1], ", "),
cmdnames[len(cmdnames)-1])
}
} else {
errtype = ErrCommandRequired
if len(cmdnames) == 1 {
msg = fmt.Sprintf("Please specify the %s command", cmdnames[0])
} else if len(cmdnames) > 1 {
msg = fmt.Sprintf("Please specify one command of: %s or %s",
strings.Join(cmdnames[:len(cmdnames)-1], ", "),
cmdnames[len(cmdnames)-1])
}
}
return newError(errtype, msg)
}
func (p *Parser) parseOption(s *parseState, name string, option *Option, canarg bool, argument *string) (err error) {
if !option.canArgument() {
if argument != nil {
return newErrorf(ErrNoArgumentForBool, "bool flag `%s' cannot have an argument", option)
}
err = option.set(nil)
} else if argument != nil || (canarg && !s.eof()) {
var arg string
if argument != nil {
arg = *argument
} else {
arg = s.pop()
if argumentIsOption(arg) && !(option.isSignedNumber() && len(arg) > 1 && arg[0] == '-' && arg[1] >= '0' && arg[1] <= '9') {
return newErrorf(ErrExpectedArgument, "expected argument for flag `%s', but got option `%s'", option, arg)
} else if p.Options&PassDoubleDash != 0 && arg == "--" {
return newErrorf(ErrExpectedArgument, "expected argument for flag `%s', but got double dash `--'", option)
}
}
if option.tag.Get("unquote") != "false" {
arg, err = unquoteIfPossible(arg)
}
if err == nil {
err = option.set(&arg)
}
} else if option.OptionalArgument {
option.empty()
for _, v := range option.OptionalValue {
err = option.set(&v)
if err != nil {
break
}
}
} else {
err = newErrorf(ErrExpectedArgument, "expected argument for flag `%s'", option)
}
if err != nil {
if _, ok := err.(*Error); !ok {
err = newErrorf(ErrMarshal, "invalid argument for flag `%s' (expected %s): %s",
option,
option.value.Type(),
err.Error())
}
}
return err
}
func (p *Parser) parseLong(s *parseState, name string, argument *string) error {
if option := s.lookup.longNames[name]; option != nil {
// Only long options that are required can consume an argument
// from the argument list
canarg := !option.OptionalArgument
return p.parseOption(s, name, option, canarg, argument)
}
return newErrorf(ErrUnknownFlag, "unknown flag `%s'", name)
}
func (p *Parser) splitShortConcatArg(s *parseState, optname string) (string, *string) {
c, n := utf8.DecodeRuneInString(optname)
if n == len(optname) {
return optname, nil
}
first := string(c)
if option := s.lookup.shortNames[first]; option != nil && option.canArgument() {
arg := optname[n:]
return first, &arg
}
return optname, nil
}
func (p *Parser) parseShort(s *parseState, optname string, argument *string) error {
if argument == nil {
optname, argument = p.splitShortConcatArg(s, optname)
}
for i, c := range optname {
shortname := string(c)
if option := s.lookup.shortNames[shortname]; option != nil {
// Only the last short argument can consume an argument from
// the arguments list, and only if it's non optional
canarg := (i+utf8.RuneLen(c) == len(optname)) && !option.OptionalArgument
if err := p.parseOption(s, shortname, option, canarg, argument); err != nil {
return err
}
} else {
return newErrorf(ErrUnknownFlag, "unknown flag `%s'", shortname)
}
// Only the first option can have a concatted argument, so just
// clear argument here
argument = nil
}
return nil
}
func (p *parseState) addArgs(args ...string) error {
for len(p.positional) > 0 && len(args) > 0 {
arg := p.positional[0]
if err := convert(args[0], arg.value, arg.tag); err != nil {
p.err = err
return err
}
if !arg.isRemaining() {
p.positional = p.positional[1:]
}
args = args[1:]
}
p.retargs = append(p.retargs, args...)
return nil
}
func (p *Parser) parseNonOption(s *parseState) error {
if len(s.positional) > 0 {
return s.addArgs(s.arg)
}
if len(s.command.commands) > 0 && len(s.retargs) == 0 {
if cmd := s.lookup.commands[s.arg]; cmd != nil {
s.command.Active = cmd
cmd.fillParseState(s)
return nil
} else if !s.command.SubcommandsOptional {
s.addArgs(s.arg)
return newErrorf(ErrUnknownCommand, "Unknown command `%s'", s.arg)
}
}
if (p.Options & PassAfterNonOption) != None {
// If PassAfterNonOption is set then all remaining arguments
// are considered positional
if err := s.addArgs(s.arg); err != nil {
return err
}
if err := s.addArgs(s.args...); err != nil {
return err
}
s.args = []string{}
} else {
return s.addArgs(s.arg)
}
return nil
}
func (p *Parser) showBuiltinHelp() error {
var b bytes.Buffer
p.WriteHelp(&b)
return newError(ErrHelp, b.String())
}
func (p *Parser) printError(err error) error {
if err != nil && (p.Options&PrintErrors) != None {
flagsErr, ok := err.(*Error)
if ok && flagsErr.Type == ErrHelp {
fmt.Fprintln(os.Stdout, err)
} else {
fmt.Fprintln(os.Stderr, err)
}
}
return err
}
func (p *Parser) clearIsSet() {
p.eachCommand(func(c *Command) {
c.eachGroup(func(g *Group) {
for _, option := range g.options {
option.isSet = false
}
})
}, true)
}

28
vendor/github.com/jessevdk/go-flags/termsize.go generated vendored Normal file
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@ -0,0 +1,28 @@
// +build !windows,!plan9,!solaris,!appengine
package flags
import (
"syscall"
"unsafe"
)
type winsize struct {
row, col uint16
xpixel, ypixel uint16
}
func getTerminalColumns() int {
ws := winsize{}
if tIOCGWINSZ != 0 {
syscall.Syscall(syscall.SYS_IOCTL,
uintptr(0),
uintptr(tIOCGWINSZ),
uintptr(unsafe.Pointer(&ws)))
return int(ws.col)
}
return 80
}

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@ -0,0 +1,7 @@
// +build windows plan9 solaris appengine
package flags
func getTerminalColumns() int {
return 80
}

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@ -0,0 +1,7 @@
// +build darwin freebsd netbsd openbsd
package flags
const (
tIOCGWINSZ = 0x40087468
)

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@ -0,0 +1,7 @@
// +build linux
package flags
const (
tIOCGWINSZ = 0x5413
)

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@ -0,0 +1,7 @@
// +build !darwin,!freebsd,!netbsd,!openbsd,!linux
package flags
const (
tIOCGWINSZ = 0
)