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llvm-mirror/lib/Support/CommandLine.cpp
Michał Górny 6b982af8c2 [llvm] [CommandLine] Do not suggest really hidden opts in nearest lookup 
Skip 'really hidden' options when performing lookup of the nearest
option when invalid option was passed.  Since these options aren't even
documented in --help-hidden, it seems inconsistent to suggest them
to users.

This fixes clang-tools-extra test failures due to unexpected suggestions
when linking the tools to LLVM dylib (that provides more options than
the subset of LLVM libraries linked directly).

Differential Revision: https://reviews.llvm.org/D82001
2020-06-17 19:00:26 +02:00

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//===-- CommandLine.cpp - Command line parser implementation --------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This class implements a command line argument processor that is useful when
// creating a tool. It provides a simple, minimalistic interface that is easily
// extensible and supports nonlocal (library) command line options.
//
// Note that rather than trying to figure out what this code does, you could try
// reading the library documentation located in docs/CommandLine.html
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/CommandLine.h"
#include "llvm-c/Support.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Triple.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Config/config.h"
#include "llvm/Support/ConvertUTF.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Process.h"
#include "llvm/Support/StringSaver.h"
#include "llvm/Support/VirtualFileSystem.h"
#include "llvm/Support/raw_ostream.h"
#include <cstdlib>
#include <map>
#include <string>
using namespace llvm;
using namespace cl;
#define DEBUG_TYPE "commandline"
//===----------------------------------------------------------------------===//
// Template instantiations and anchors.
//
namespace llvm {
namespace cl {
template class basic_parser<bool>;
template class basic_parser<boolOrDefault>;
template class basic_parser<int>;
template class basic_parser<long>;
template class basic_parser<long long>;
template class basic_parser<unsigned>;
template class basic_parser<unsigned long>;
template class basic_parser<unsigned long long>;
template class basic_parser<double>;
template class basic_parser<float>;
template class basic_parser<std::string>;
template class basic_parser<char>;
template class opt<unsigned>;
template class opt<int>;
template class opt<std::string>;
template class opt<char>;
template class opt<bool>;
}
} // end namespace llvm::cl
// Pin the vtables to this file.
void GenericOptionValue::anchor() {}
void OptionValue<boolOrDefault>::anchor() {}
void OptionValue<std::string>::anchor() {}
void Option::anchor() {}
void basic_parser_impl::anchor() {}
void parser<bool>::anchor() {}
void parser<boolOrDefault>::anchor() {}
void parser<int>::anchor() {}
void parser<long>::anchor() {}
void parser<long long>::anchor() {}
void parser<unsigned>::anchor() {}
void parser<unsigned long>::anchor() {}
void parser<unsigned long long>::anchor() {}
void parser<double>::anchor() {}
void parser<float>::anchor() {}
void parser<std::string>::anchor() {}
void parser<char>::anchor() {}
//===----------------------------------------------------------------------===//
const static size_t DefaultPad = 2;
static StringRef ArgPrefix = "-";
static StringRef ArgPrefixLong = "--";
static StringRef ArgHelpPrefix = " - ";
static size_t argPlusPrefixesSize(StringRef ArgName, size_t Pad = DefaultPad) {
size_t Len = ArgName.size();
if (Len == 1)
return Len + Pad + ArgPrefix.size() + ArgHelpPrefix.size();
return Len + Pad + ArgPrefixLong.size() + ArgHelpPrefix.size();
}
static SmallString<8> argPrefix(StringRef ArgName, size_t Pad = DefaultPad) {
SmallString<8> Prefix;
for (size_t I = 0; I < Pad; ++I) {
Prefix.push_back(' ');
}
Prefix.append(ArgName.size() > 1 ? ArgPrefixLong : ArgPrefix);
return Prefix;
}
// Option predicates...
static inline bool isGrouping(const Option *O) {
return O->getMiscFlags() & cl::Grouping;
}
static inline bool isPrefixedOrGrouping(const Option *O) {
return isGrouping(O) || O->getFormattingFlag() == cl::Prefix ||
O->getFormattingFlag() == cl::AlwaysPrefix;
}
namespace {
class PrintArg {
StringRef ArgName;
size_t Pad;
public:
PrintArg(StringRef ArgName, size_t Pad = DefaultPad) : ArgName(ArgName), Pad(Pad) {}
friend raw_ostream &operator<<(raw_ostream &OS, const PrintArg &);
};
raw_ostream &operator<<(raw_ostream &OS, const PrintArg& Arg) {
OS << argPrefix(Arg.ArgName, Arg.Pad) << Arg.ArgName;
return OS;
}
class CommandLineParser {
public:
// Globals for name and overview of program. Program name is not a string to
// avoid static ctor/dtor issues.
std::string ProgramName;
StringRef ProgramOverview;
// This collects additional help to be printed.
std::vector<StringRef> MoreHelp;
// This collects Options added with the cl::DefaultOption flag. Since they can
// be overridden, they are not added to the appropriate SubCommands until
// ParseCommandLineOptions actually runs.
SmallVector<Option*, 4> DefaultOptions;
// This collects the different option categories that have been registered.
SmallPtrSet<OptionCategory *, 16> RegisteredOptionCategories;
// This collects the different subcommands that have been registered.
SmallPtrSet<SubCommand *, 4> RegisteredSubCommands;
CommandLineParser() : ActiveSubCommand(nullptr) {
registerSubCommand(&*TopLevelSubCommand);
registerSubCommand(&*AllSubCommands);
}
void ResetAllOptionOccurrences();
bool ParseCommandLineOptions(int argc, const char *const *argv,
StringRef Overview, raw_ostream *Errs = nullptr,
bool LongOptionsUseDoubleDash = false);
void addLiteralOption(Option &Opt, SubCommand *SC, StringRef Name) {
if (Opt.hasArgStr())
return;
if (!SC->OptionsMap.insert(std::make_pair(Name, &Opt)).second) {
errs() << ProgramName << ": CommandLine Error: Option '" << Name
<< "' registered more than once!\n";
report_fatal_error("inconsistency in registered CommandLine options");
}
// If we're adding this to all sub-commands, add it to the ones that have
// already been registered.
if (SC == &*AllSubCommands) {
for (auto *Sub : RegisteredSubCommands) {
if (SC == Sub)
continue;
addLiteralOption(Opt, Sub, Name);
}
}
}
void addLiteralOption(Option &Opt, StringRef Name) {
if (Opt.Subs.empty())
addLiteralOption(Opt, &*TopLevelSubCommand, Name);
else {
for (auto SC : Opt.Subs)
addLiteralOption(Opt, SC, Name);
}
}
void addOption(Option *O, SubCommand *SC) {
bool HadErrors = false;
if (O->hasArgStr()) {
// If it's a DefaultOption, check to make sure it isn't already there.
if (O->isDefaultOption() &&
SC->OptionsMap.find(O->ArgStr) != SC->OptionsMap.end())
return;
// Add argument to the argument map!
if (!SC->OptionsMap.insert(std::make_pair(O->ArgStr, O)).second) {
errs() << ProgramName << ": CommandLine Error: Option '" << O->ArgStr
<< "' registered more than once!\n";
HadErrors = true;
}
}
// Remember information about positional options.
if (O->getFormattingFlag() == cl::Positional)
SC->PositionalOpts.push_back(O);
else if (O->getMiscFlags() & cl::Sink) // Remember sink options
SC->SinkOpts.push_back(O);
else if (O->getNumOccurrencesFlag() == cl::ConsumeAfter) {
if (SC->ConsumeAfterOpt) {
O->error("Cannot specify more than one option with cl::ConsumeAfter!");
HadErrors = true;
}
SC->ConsumeAfterOpt = O;
}
// Fail hard if there were errors. These are strictly unrecoverable and
// indicate serious issues such as conflicting option names or an
// incorrectly
// linked LLVM distribution.
if (HadErrors)
report_fatal_error("inconsistency in registered CommandLine options");
// If we're adding this to all sub-commands, add it to the ones that have
// already been registered.
if (SC == &*AllSubCommands) {
for (auto *Sub : RegisteredSubCommands) {
if (SC == Sub)
continue;
addOption(O, Sub);
}
}
}
void addOption(Option *O, bool ProcessDefaultOption = false) {
if (!ProcessDefaultOption && O->isDefaultOption()) {
DefaultOptions.push_back(O);
return;
}
if (O->Subs.empty()) {
addOption(O, &*TopLevelSubCommand);
} else {
for (auto SC : O->Subs)
addOption(O, SC);
}
}
void removeOption(Option *O, SubCommand *SC) {
SmallVector<StringRef, 16> OptionNames;
O->getExtraOptionNames(OptionNames);
if (O->hasArgStr())
OptionNames.push_back(O->ArgStr);
SubCommand &Sub = *SC;
auto End = Sub.OptionsMap.end();
for (auto Name : OptionNames) {
auto I = Sub.OptionsMap.find(Name);
if (I != End && I->getValue() == O)
Sub.OptionsMap.erase(I);
}
if (O->getFormattingFlag() == cl::Positional)
for (auto Opt = Sub.PositionalOpts.begin();
Opt != Sub.PositionalOpts.end(); ++Opt) {
if (*Opt == O) {
Sub.PositionalOpts.erase(Opt);
break;
}
}
else if (O->getMiscFlags() & cl::Sink)
for (auto Opt = Sub.SinkOpts.begin(); Opt != Sub.SinkOpts.end(); ++Opt) {
if (*Opt == O) {
Sub.SinkOpts.erase(Opt);
break;
}
}
else if (O == Sub.ConsumeAfterOpt)
Sub.ConsumeAfterOpt = nullptr;
}
void removeOption(Option *O) {
if (O->Subs.empty())
removeOption(O, &*TopLevelSubCommand);
else {
if (O->isInAllSubCommands()) {
for (auto SC : RegisteredSubCommands)
removeOption(O, SC);
} else {
for (auto SC : O->Subs)
removeOption(O, SC);
}
}
}
bool hasOptions(const SubCommand &Sub) const {
return (!Sub.OptionsMap.empty() || !Sub.PositionalOpts.empty() ||
nullptr != Sub.ConsumeAfterOpt);
}
bool hasOptions() const {
for (const auto *S : RegisteredSubCommands) {
if (hasOptions(*S))
return true;
}
return false;
}
SubCommand *getActiveSubCommand() { return ActiveSubCommand; }
void updateArgStr(Option *O, StringRef NewName, SubCommand *SC) {
SubCommand &Sub = *SC;
if (!Sub.OptionsMap.insert(std::make_pair(NewName, O)).second) {
errs() << ProgramName << ": CommandLine Error: Option '" << O->ArgStr
<< "' registered more than once!\n";
report_fatal_error("inconsistency in registered CommandLine options");
}
Sub.OptionsMap.erase(O->ArgStr);
}
void updateArgStr(Option *O, StringRef NewName) {
if (O->Subs.empty())
updateArgStr(O, NewName, &*TopLevelSubCommand);
else {
if (O->isInAllSubCommands()) {
for (auto SC : RegisteredSubCommands)
updateArgStr(O, NewName, SC);
} else {
for (auto SC : O->Subs)
updateArgStr(O, NewName, SC);
}
}
}
void printOptionValues();
void registerCategory(OptionCategory *cat) {
assert(count_if(RegisteredOptionCategories,
[cat](const OptionCategory *Category) {
return cat->getName() == Category->getName();
}) == 0 &&
"Duplicate option categories");
RegisteredOptionCategories.insert(cat);
}
void registerSubCommand(SubCommand *sub) {
assert(count_if(RegisteredSubCommands,
[sub](const SubCommand *Sub) {
return (!sub->getName().empty()) &&
(Sub->getName() == sub->getName());
}) == 0 &&
"Duplicate subcommands");
RegisteredSubCommands.insert(sub);
// For all options that have been registered for all subcommands, add the
// option to this subcommand now.
if (sub != &*AllSubCommands) {
for (auto &E : AllSubCommands->OptionsMap) {
Option *O = E.second;
if ((O->isPositional() || O->isSink() || O->isConsumeAfter()) ||
O->hasArgStr())
addOption(O, sub);
else
addLiteralOption(*O, sub, E.first());
}
}
}
void unregisterSubCommand(SubCommand *sub) {
RegisteredSubCommands.erase(sub);
}
iterator_range<typename SmallPtrSet<SubCommand *, 4>::iterator>
getRegisteredSubcommands() {
return make_range(RegisteredSubCommands.begin(),
RegisteredSubCommands.end());
}
void reset() {
ActiveSubCommand = nullptr;
ProgramName.clear();
ProgramOverview = StringRef();
MoreHelp.clear();
RegisteredOptionCategories.clear();
ResetAllOptionOccurrences();
RegisteredSubCommands.clear();
TopLevelSubCommand->reset();
AllSubCommands->reset();
registerSubCommand(&*TopLevelSubCommand);
registerSubCommand(&*AllSubCommands);
DefaultOptions.clear();
}
private:
SubCommand *ActiveSubCommand;
Option *LookupOption(SubCommand &Sub, StringRef &Arg, StringRef &Value);
Option *LookupLongOption(SubCommand &Sub, StringRef &Arg, StringRef &Value,
bool LongOptionsUseDoubleDash, bool HaveDoubleDash) {
Option *Opt = LookupOption(Sub, Arg, Value);
if (Opt && LongOptionsUseDoubleDash && !HaveDoubleDash && !isGrouping(Opt))
return nullptr;
return Opt;
}
SubCommand *LookupSubCommand(StringRef Name);
};
} // namespace
static ManagedStatic<CommandLineParser> GlobalParser;
void cl::AddLiteralOption(Option &O, StringRef Name) {
GlobalParser->addLiteralOption(O, Name);
}
extrahelp::extrahelp(StringRef Help) : morehelp(Help) {
GlobalParser->MoreHelp.push_back(Help);
}
void Option::addArgument() {
GlobalParser->addOption(this);
FullyInitialized = true;
}
void Option::removeArgument() { GlobalParser->removeOption(this); }
void Option::setArgStr(StringRef S) {
if (FullyInitialized)
GlobalParser->updateArgStr(this, S);
assert((S.empty() || S[0] != '-') && "Option can't start with '-");
ArgStr = S;
if (ArgStr.size() == 1)
setMiscFlag(Grouping);
}
void Option::addCategory(OptionCategory &C) {
assert(!Categories.empty() && "Categories cannot be empty.");
// Maintain backward compatibility by replacing the default GeneralCategory
// if it's still set. Otherwise, just add the new one. The GeneralCategory
// must be explicitly added if you want multiple categories that include it.
if (&C != &GeneralCategory && Categories[0] == &GeneralCategory)
Categories[0] = &C;
else if (find(Categories, &C) == Categories.end())
Categories.push_back(&C);
}
void Option::reset() {
NumOccurrences = 0;
setDefault();
if (isDefaultOption())
removeArgument();
}
// Initialise the general option category.
OptionCategory llvm::cl::GeneralCategory("General options");
void OptionCategory::registerCategory() {
GlobalParser->registerCategory(this);
}
// A special subcommand representing no subcommand. It is particularly important
// that this ManagedStatic uses constant initailization and not dynamic
// initialization because it is referenced from cl::opt constructors, which run
// dynamically in an arbitrary order.
LLVM_REQUIRE_CONSTANT_INITIALIZATION
ManagedStatic<SubCommand> llvm::cl::TopLevelSubCommand;
// A special subcommand that can be used to put an option into all subcommands.
ManagedStatic<SubCommand> llvm::cl::AllSubCommands;
void SubCommand::registerSubCommand() {
GlobalParser->registerSubCommand(this);
}
void SubCommand::unregisterSubCommand() {
GlobalParser->unregisterSubCommand(this);
}
void SubCommand::reset() {
PositionalOpts.clear();
SinkOpts.clear();
OptionsMap.clear();
ConsumeAfterOpt = nullptr;
}
SubCommand::operator bool() const {
return (GlobalParser->getActiveSubCommand() == this);
}
//===----------------------------------------------------------------------===//
// Basic, shared command line option processing machinery.
//
/// LookupOption - Lookup the option specified by the specified option on the
/// command line. If there is a value specified (after an equal sign) return
/// that as well. This assumes that leading dashes have already been stripped.
Option *CommandLineParser::LookupOption(SubCommand &Sub, StringRef &Arg,
StringRef &Value) {
// Reject all dashes.
if (Arg.empty())
return nullptr;
assert(&Sub != &*AllSubCommands);
size_t EqualPos = Arg.find('=');
// If we have an equals sign, remember the value.
if (EqualPos == StringRef::npos) {
// Look up the option.
auto I = Sub.OptionsMap.find(Arg);
if (I == Sub.OptionsMap.end())
return nullptr;
return I != Sub.OptionsMap.end() ? I->second : nullptr;
}
// If the argument before the = is a valid option name and the option allows
// non-prefix form (ie is not AlwaysPrefix), we match. If not, signal match
// failure by returning nullptr.
auto I = Sub.OptionsMap.find(Arg.substr(0, EqualPos));
if (I == Sub.OptionsMap.end())
return nullptr;
auto O = I->second;
if (O->getFormattingFlag() == cl::AlwaysPrefix)
return nullptr;
Value = Arg.substr(EqualPos + 1);
Arg = Arg.substr(0, EqualPos);
return I->second;
}
SubCommand *CommandLineParser::LookupSubCommand(StringRef Name) {
if (Name.empty())
return &*TopLevelSubCommand;
for (auto S : RegisteredSubCommands) {
if (S == &*AllSubCommands)
continue;
if (S->getName().empty())
continue;
if (StringRef(S->getName()) == StringRef(Name))
return S;
}
return &*TopLevelSubCommand;
}
/// LookupNearestOption - Lookup the closest match to the option specified by
/// the specified option on the command line. If there is a value specified
/// (after an equal sign) return that as well. This assumes that leading dashes
/// have already been stripped.
static Option *LookupNearestOption(StringRef Arg,
const StringMap<Option *> &OptionsMap,
std::string &NearestString) {
// Reject all dashes.
if (Arg.empty())
return nullptr;
// Split on any equal sign.
std::pair<StringRef, StringRef> SplitArg = Arg.split('=');
StringRef &LHS = SplitArg.first; // LHS == Arg when no '=' is present.
StringRef &RHS = SplitArg.second;
// Find the closest match.
Option *Best = nullptr;
unsigned BestDistance = 0;
for (StringMap<Option *>::const_iterator it = OptionsMap.begin(),
ie = OptionsMap.end();
it != ie; ++it) {
Option *O = it->second;
// Do not suggest really hidden options (not shown in any help).
if (O->getOptionHiddenFlag() == ReallyHidden)
continue;
SmallVector<StringRef, 16> OptionNames;
O->getExtraOptionNames(OptionNames);
if (O->hasArgStr())
OptionNames.push_back(O->ArgStr);
bool PermitValue = O->getValueExpectedFlag() != cl::ValueDisallowed;
StringRef Flag = PermitValue ? LHS : Arg;
for (auto Name : OptionNames) {
unsigned Distance = StringRef(Name).edit_distance(
Flag, /*AllowReplacements=*/true, /*MaxEditDistance=*/BestDistance);
if (!Best || Distance < BestDistance) {
Best = O;
BestDistance = Distance;
if (RHS.empty() || !PermitValue)
NearestString = std::string(Name);
else
NearestString = (Twine(Name) + "=" + RHS).str();
}
}
}
return Best;
}
/// CommaSeparateAndAddOccurrence - A wrapper around Handler->addOccurrence()
/// that does special handling of cl::CommaSeparated options.
static bool CommaSeparateAndAddOccurrence(Option *Handler, unsigned pos,
StringRef ArgName, StringRef Value,
bool MultiArg = false) {
// Check to see if this option accepts a comma separated list of values. If
// it does, we have to split up the value into multiple values.
if (Handler->getMiscFlags() & CommaSeparated) {
StringRef Val(Value);
StringRef::size_type Pos = Val.find(',');
while (Pos != StringRef::npos) {
// Process the portion before the comma.
if (Handler->addOccurrence(pos, ArgName, Val.substr(0, Pos), MultiArg))
return true;
// Erase the portion before the comma, AND the comma.
Val = Val.substr(Pos + 1);
// Check for another comma.
Pos = Val.find(',');
}
Value = Val;
}
return Handler->addOccurrence(pos, ArgName, Value, MultiArg);
}
/// ProvideOption - For Value, this differentiates between an empty value ("")
/// and a null value (StringRef()). The later is accepted for arguments that
/// don't allow a value (-foo) the former is rejected (-foo=).
static inline bool ProvideOption(Option *Handler, StringRef ArgName,
StringRef Value, int argc,
const char *const *argv, int &i) {
// Is this a multi-argument option?
unsigned NumAdditionalVals = Handler->getNumAdditionalVals();
// Enforce value requirements
switch (Handler->getValueExpectedFlag()) {
case ValueRequired:
if (!Value.data()) { // No value specified?
// If no other argument or the option only supports prefix form, we
// cannot look at the next argument.
if (i + 1 >= argc || Handler->getFormattingFlag() == cl::AlwaysPrefix)
return Handler->error("requires a value!");
// Steal the next argument, like for '-o filename'
assert(argv && "null check");
Value = StringRef(argv[++i]);
}
break;
case ValueDisallowed:
if (NumAdditionalVals > 0)
return Handler->error("multi-valued option specified"
" with ValueDisallowed modifier!");
if (Value.data())
return Handler->error("does not allow a value! '" + Twine(Value) +
"' specified.");
break;
case ValueOptional:
break;
}
// If this isn't a multi-arg option, just run the handler.
if (NumAdditionalVals == 0)
return CommaSeparateAndAddOccurrence(Handler, i, ArgName, Value);
// If it is, run the handle several times.
bool MultiArg = false;
if (Value.data()) {
if (CommaSeparateAndAddOccurrence(Handler, i, ArgName, Value, MultiArg))
return true;
--NumAdditionalVals;
MultiArg = true;
}
while (NumAdditionalVals > 0) {
if (i + 1 >= argc)
return Handler->error("not enough values!");
assert(argv && "null check");
Value = StringRef(argv[++i]);
if (CommaSeparateAndAddOccurrence(Handler, i, ArgName, Value, MultiArg))
return true;
MultiArg = true;
--NumAdditionalVals;
}
return false;
}
bool llvm::cl::ProvidePositionalOption(Option *Handler, StringRef Arg, int i) {
int Dummy = i;
return ProvideOption(Handler, Handler->ArgStr, Arg, 0, nullptr, Dummy);
}
// getOptionPred - Check to see if there are any options that satisfy the
// specified predicate with names that are the prefixes in Name. This is
// checked by progressively stripping characters off of the name, checking to
// see if there options that satisfy the predicate. If we find one, return it,
// otherwise return null.
//
static Option *getOptionPred(StringRef Name, size_t &Length,
bool (*Pred)(const Option *),
const StringMap<Option *> &OptionsMap) {
StringMap<Option *>::const_iterator OMI = OptionsMap.find(Name);
if (OMI != OptionsMap.end() && !Pred(OMI->getValue()))
OMI = OptionsMap.end();
// Loop while we haven't found an option and Name still has at least two
// characters in it (so that the next iteration will not be the empty
// string.
while (OMI == OptionsMap.end() && Name.size() > 1) {
Name = Name.substr(0, Name.size() - 1); // Chop off the last character.
OMI = OptionsMap.find(Name);
if (OMI != OptionsMap.end() && !Pred(OMI->getValue()))
OMI = OptionsMap.end();
}
if (OMI != OptionsMap.end() && Pred(OMI->second)) {
Length = Name.size();
return OMI->second; // Found one!
}
return nullptr; // No option found!
}
/// HandlePrefixedOrGroupedOption - The specified argument string (which started
/// with at least one '-') does not fully match an available option. Check to
/// see if this is a prefix or grouped option. If so, split arg into output an
/// Arg/Value pair and return the Option to parse it with.
static Option *
HandlePrefixedOrGroupedOption(StringRef &Arg, StringRef &Value,
bool &ErrorParsing,
const StringMap<Option *> &OptionsMap) {
if (Arg.size() == 1)
return nullptr;
// Do the lookup!
size_t Length = 0;
Option *PGOpt = getOptionPred(Arg, Length, isPrefixedOrGrouping, OptionsMap);
if (!PGOpt)
return nullptr;
do {
StringRef MaybeValue =
(Length < Arg.size()) ? Arg.substr(Length) : StringRef();
Arg = Arg.substr(0, Length);
assert(OptionsMap.count(Arg) && OptionsMap.find(Arg)->second == PGOpt);
// cl::Prefix options do not preserve '=' when used separately.
// The behavior for them with grouped options should be the same.
if (MaybeValue.empty() || PGOpt->getFormattingFlag() == cl::AlwaysPrefix ||
(PGOpt->getFormattingFlag() == cl::Prefix && MaybeValue[0] != '=')) {
Value = MaybeValue;
return PGOpt;
}
if (MaybeValue[0] == '=') {
Value = MaybeValue.substr(1);
return PGOpt;
}
// This must be a grouped option.
assert(isGrouping(PGOpt) && "Broken getOptionPred!");
// Grouping options inside a group can't have values.
if (PGOpt->getValueExpectedFlag() == cl::ValueRequired) {
ErrorParsing |= PGOpt->error("may not occur within a group!");
return nullptr;
}
// Because the value for the option is not required, we don't need to pass
// argc/argv in.
int Dummy = 0;
ErrorParsing |= ProvideOption(PGOpt, Arg, StringRef(), 0, nullptr, Dummy);
// Get the next grouping option.
Arg = MaybeValue;
PGOpt = getOptionPred(Arg, Length, isGrouping, OptionsMap);
} while (PGOpt);
// We could not find a grouping option in the remainder of Arg.
return nullptr;
}
static bool RequiresValue(const Option *O) {
return O->getNumOccurrencesFlag() == cl::Required ||
O->getNumOccurrencesFlag() == cl::OneOrMore;
}
static bool EatsUnboundedNumberOfValues(const Option *O) {
return O->getNumOccurrencesFlag() == cl::ZeroOrMore ||
O->getNumOccurrencesFlag() == cl::OneOrMore;
}
static bool isWhitespace(char C) {
return C == ' ' || C == '\t' || C == '\r' || C == '\n';
}
static bool isWhitespaceOrNull(char C) {
return isWhitespace(C) || C == '\0';
}
static bool isQuote(char C) { return C == '\"' || C == '\''; }
void cl::TokenizeGNUCommandLine(StringRef Src, StringSaver &Saver,
SmallVectorImpl<const char *> &NewArgv,
bool MarkEOLs) {
SmallString<128> Token;
for (size_t I = 0, E = Src.size(); I != E; ++I) {
// Consume runs of whitespace.
if (Token.empty()) {
while (I != E && isWhitespace(Src[I])) {
// Mark the end of lines in response files
if (MarkEOLs && Src[I] == '\n')
NewArgv.push_back(nullptr);
++I;
}
if (I == E)
break;
}
char C = Src[I];
// Backslash escapes the next character.
if (I + 1 < E && C == '\\') {
++I; // Skip the escape.
Token.push_back(Src[I]);
continue;
}
// Consume a quoted string.
if (isQuote(C)) {
++I;
while (I != E && Src[I] != C) {
// Backslash escapes the next character.
if (Src[I] == '\\' && I + 1 != E)
++I;
Token.push_back(Src[I]);
++I;
}
if (I == E)
break;
continue;
}
// End the token if this is whitespace.
if (isWhitespace(C)) {
if (!Token.empty())
NewArgv.push_back(Saver.save(StringRef(Token)).data());
Token.clear();
continue;
}
// This is a normal character. Append it.
Token.push_back(C);
}
// Append the last token after hitting EOF with no whitespace.
if (!Token.empty())
NewArgv.push_back(Saver.save(StringRef(Token)).data());
// Mark the end of response files
if (MarkEOLs)
NewArgv.push_back(nullptr);
}
/// Backslashes are interpreted in a rather complicated way in the Windows-style
/// command line, because backslashes are used both to separate path and to
/// escape double quote. This method consumes runs of backslashes as well as the
/// following double quote if it's escaped.
///
/// * If an even number of backslashes is followed by a double quote, one
/// backslash is output for every pair of backslashes, and the last double
/// quote remains unconsumed. The double quote will later be interpreted as
/// the start or end of a quoted string in the main loop outside of this
/// function.
///
/// * If an odd number of backslashes is followed by a double quote, one
/// backslash is output for every pair of backslashes, and a double quote is
/// output for the last pair of backslash-double quote. The double quote is
/// consumed in this case.
///
/// * Otherwise, backslashes are interpreted literally.
static size_t parseBackslash(StringRef Src, size_t I, SmallString<128> &Token) {
size_t E = Src.size();
int BackslashCount = 0;
// Skip the backslashes.
do {
++I;
++BackslashCount;
} while (I != E && Src[I] == '\\');
bool FollowedByDoubleQuote = (I != E && Src[I] == '"');
if (FollowedByDoubleQuote) {
Token.append(BackslashCount / 2, '\\');
if (BackslashCount % 2 == 0)
return I - 1;
Token.push_back('"');
return I;
}
Token.append(BackslashCount, '\\');
return I - 1;
}
// Windows treats whitespace, double quotes, and backslashes specially.
static bool isWindowsSpecialChar(char C) {
return isWhitespaceOrNull(C) || C == '\\' || C == '\"';
}
// Windows tokenization implementation. The implementation is designed to be
// inlined and specialized for the two user entry points.
static inline void
tokenizeWindowsCommandLineImpl(StringRef Src, StringSaver &Saver,
function_ref<void(StringRef)> AddToken,
bool AlwaysCopy, function_ref<void()> MarkEOL) {
SmallString<128> Token;
// Try to do as much work inside the state machine as possible.
enum { INIT, UNQUOTED, QUOTED } State = INIT;
for (size_t I = 0, E = Src.size(); I < E; ++I) {
switch (State) {
case INIT: {
assert(Token.empty() && "token should be empty in initial state");
// Eat whitespace before a token.
while (I < E && isWhitespaceOrNull(Src[I])) {
if (Src[I] == '\n')
MarkEOL();
++I;
}
// Stop if this was trailing whitespace.
if (I >= E)
break;
size_t Start = I;
while (I < E && !isWindowsSpecialChar(Src[I]))
++I;
StringRef NormalChars = Src.slice(Start, I);
if (I >= E || isWhitespaceOrNull(Src[I])) {
if (I < E && Src[I] == '\n')
MarkEOL();
// No special characters: slice out the substring and start the next
// token. Copy the string if the caller asks us to.
AddToken(AlwaysCopy ? Saver.save(NormalChars) : NormalChars);
} else if (Src[I] == '\"') {
Token += NormalChars;
State = QUOTED;
} else if (Src[I] == '\\') {
Token += NormalChars;
I = parseBackslash(Src, I, Token);
State = UNQUOTED;
} else {
llvm_unreachable("unexpected special character");
}
break;
}
case UNQUOTED:
if (isWhitespaceOrNull(Src[I])) {
// Whitespace means the end of the token. If we are in this state, the
// token must have contained a special character, so we must copy the
// token.
AddToken(Saver.save(Token.str()));
Token.clear();
if (Src[I] == '\n')
MarkEOL();
State = INIT;
} else if (Src[I] == '\"') {
State = QUOTED;
} else if (Src[I] == '\\') {
I = parseBackslash(Src, I, Token);
} else {
Token.push_back(Src[I]);
}
break;
case QUOTED:
if (Src[I] == '\"') {
if (I < (E - 1) && Src[I + 1] == '"') {
// Consecutive double-quotes inside a quoted string implies one
// double-quote.
Token.push_back('"');
++I;
} else {
// Otherwise, end the quoted portion and return to the unquoted state.
State = UNQUOTED;
}
} else if (Src[I] == '\\') {
I = parseBackslash(Src, I, Token);
} else {
Token.push_back(Src[I]);
}
break;
}
}
if (State == UNQUOTED)
AddToken(Saver.save(Token.str()));
}
void cl::TokenizeWindowsCommandLine(StringRef Src, StringSaver &Saver,
SmallVectorImpl<const char *> &NewArgv,
bool MarkEOLs) {
auto AddToken = [&](StringRef Tok) { NewArgv.push_back(Tok.data()); };
auto OnEOL = [&]() {
if (MarkEOLs)
NewArgv.push_back(nullptr);
};
tokenizeWindowsCommandLineImpl(Src, Saver, AddToken,
/*AlwaysCopy=*/true, OnEOL);
}
void cl::TokenizeWindowsCommandLineNoCopy(StringRef Src, StringSaver &Saver,
SmallVectorImpl<StringRef> &NewArgv) {
auto AddToken = [&](StringRef Tok) { NewArgv.push_back(Tok); };
auto OnEOL = []() {};
tokenizeWindowsCommandLineImpl(Src, Saver, AddToken, /*AlwaysCopy=*/false,
OnEOL);
}
void cl::tokenizeConfigFile(StringRef Source, StringSaver &Saver,
SmallVectorImpl<const char *> &NewArgv,
bool MarkEOLs) {
for (const char *Cur = Source.begin(); Cur != Source.end();) {
SmallString<128> Line;
// Check for comment line.
if (isWhitespace(*Cur)) {
while (Cur != Source.end() && isWhitespace(*Cur))
++Cur;
continue;
}
if (*Cur == '#') {
while (Cur != Source.end() && *Cur != '\n')
++Cur;
continue;
}
// Find end of the current line.
const char *Start = Cur;
for (const char *End = Source.end(); Cur != End; ++Cur) {
if (*Cur == '\\') {
if (Cur + 1 != End) {
++Cur;
if (*Cur == '\n' ||
(*Cur == '\r' && (Cur + 1 != End) && Cur[1] == '\n')) {
Line.append(Start, Cur - 1);
if (*Cur == '\r')
++Cur;
Start = Cur + 1;
}
}
} else if (*Cur == '\n')
break;
}
// Tokenize line.
Line.append(Start, Cur);
cl::TokenizeGNUCommandLine(Line, Saver, NewArgv, MarkEOLs);
}
}
// It is called byte order marker but the UTF-8 BOM is actually not affected
// by the host system's endianness.
static bool hasUTF8ByteOrderMark(ArrayRef<char> S) {
return (S.size() >= 3 && S[0] == '\xef' && S[1] == '\xbb' && S[2] == '\xbf');
}
// FName must be an absolute path.
static llvm::Error ExpandResponseFile(
StringRef FName, StringSaver &Saver, TokenizerCallback Tokenizer,
SmallVectorImpl<const char *> &NewArgv, bool MarkEOLs, bool RelativeNames,
llvm::vfs::FileSystem &FS) {
assert(sys::path::is_absolute(FName));
llvm::ErrorOr<std::unique_ptr<MemoryBuffer>> MemBufOrErr =
FS.getBufferForFile(FName);
if (!MemBufOrErr)
return llvm::errorCodeToError(MemBufOrErr.getError());
MemoryBuffer &MemBuf = *MemBufOrErr.get();
StringRef Str(MemBuf.getBufferStart(), MemBuf.getBufferSize());
// If we have a UTF-16 byte order mark, convert to UTF-8 for parsing.
ArrayRef<char> BufRef(MemBuf.getBufferStart(), MemBuf.getBufferEnd());
std::string UTF8Buf;
if (hasUTF16ByteOrderMark(BufRef)) {
if (!convertUTF16ToUTF8String(BufRef, UTF8Buf))
return llvm::createStringError(std::errc::illegal_byte_sequence,
"Could not convert UTF16 to UTF8");
Str = StringRef(UTF8Buf);
}
// If we see UTF-8 BOM sequence at the beginning of a file, we shall remove
// these bytes before parsing.
// Reference: http://en.wikipedia.org/wiki/UTF-8#Byte_order_mark
else if (hasUTF8ByteOrderMark(BufRef))
Str = StringRef(BufRef.data() + 3, BufRef.size() - 3);
// Tokenize the contents into NewArgv.
Tokenizer(Str, Saver, NewArgv, MarkEOLs);
if (!RelativeNames)
return Error::success();
llvm::StringRef BasePath = llvm::sys::path::parent_path(FName);
// If names of nested response files should be resolved relative to including
// file, replace the included response file names with their full paths
// obtained by required resolution.
for (auto &Arg : NewArgv) {
// Skip non-rsp file arguments.
if (!Arg || Arg[0] != '@')
continue;
StringRef FileName(Arg + 1);
// Skip if non-relative.
if (!llvm::sys::path::is_relative(FileName))
continue;
SmallString<128> ResponseFile;
ResponseFile.push_back('@');
ResponseFile.append(BasePath);
llvm::sys::path::append(ResponseFile, FileName);
Arg = Saver.save(ResponseFile.c_str()).data();
}
return Error::success();
}
/// Expand response files on a command line recursively using the given
/// StringSaver and tokenization strategy.
bool cl::ExpandResponseFiles(StringSaver &Saver, TokenizerCallback Tokenizer,
SmallVectorImpl<const char *> &Argv, bool MarkEOLs,
bool RelativeNames, llvm::vfs::FileSystem &FS,
llvm::Optional<llvm::StringRef> CurrentDir) {
bool AllExpanded = true;
struct ResponseFileRecord {
std::string File;
size_t End;
};
// To detect recursive response files, we maintain a stack of files and the
// position of the last argument in the file. This position is updated
// dynamically as we recursively expand files.
SmallVector<ResponseFileRecord, 3> FileStack;
// Push a dummy entry that represents the initial command line, removing
// the need to check for an empty list.
FileStack.push_back({"", Argv.size()});
// Don't cache Argv.size() because it can change.
for (unsigned I = 0; I != Argv.size();) {
while (I == FileStack.back().End) {
// Passing the end of a file's argument list, so we can remove it from the
// stack.
FileStack.pop_back();
}
const char *Arg = Argv[I];
// Check if it is an EOL marker
if (Arg == nullptr) {
++I;
continue;
}
if (Arg[0] != '@') {
++I;
continue;
}
const char *FName = Arg + 1;
// Note that CurrentDir is only used for top-level rsp files, the rest will
// always have an absolute path deduced from the containing file.
SmallString<128> CurrDir;
if (llvm::sys::path::is_relative(FName)) {
if (!CurrentDir)
llvm::sys::fs::current_path(CurrDir);
else
CurrDir = *CurrentDir;
llvm::sys::path::append(CurrDir, FName);
FName = CurrDir.c_str();
}
auto IsEquivalent = [FName, &FS](const ResponseFileRecord &RFile) {
llvm::ErrorOr<llvm::vfs::Status> LHS = FS.status(FName);
if (!LHS) {
// TODO: The error should be propagated up the stack.
llvm::consumeError(llvm::errorCodeToError(LHS.getError()));
return false;
}
llvm::ErrorOr<llvm::vfs::Status> RHS = FS.status(RFile.File);
if (!RHS) {
// TODO: The error should be propagated up the stack.
llvm::consumeError(llvm::errorCodeToError(RHS.getError()));
return false;
}
return LHS->equivalent(*RHS);
};
// Check for recursive response files.
if (std::any_of(FileStack.begin() + 1, FileStack.end(), IsEquivalent)) {
// This file is recursive, so we leave it in the argument stream and
// move on.
AllExpanded = false;
++I;
continue;
}
// Replace this response file argument with the tokenization of its
// contents. Nested response files are expanded in subsequent iterations.
SmallVector<const char *, 0> ExpandedArgv;
if (llvm::Error Err =
ExpandResponseFile(FName, Saver, Tokenizer, ExpandedArgv, MarkEOLs,
RelativeNames, FS)) {
// We couldn't read this file, so we leave it in the argument stream and
// move on.
// TODO: The error should be propagated up the stack.
llvm::consumeError(std::move(Err));
AllExpanded = false;
++I;
continue;
}
for (ResponseFileRecord &Record : FileStack) {
// Increase the end of all active records by the number of newly expanded
// arguments, minus the response file itself.
Record.End += ExpandedArgv.size() - 1;
}
FileStack.push_back({FName, I + ExpandedArgv.size()});
Argv.erase(Argv.begin() + I);
Argv.insert(Argv.begin() + I, ExpandedArgv.begin(), ExpandedArgv.end());
}
// If successful, the top of the file stack will mark the end of the Argv
// stream. A failure here indicates a bug in the stack popping logic above.
// Note that FileStack may have more than one element at this point because we
// don't have a chance to pop the stack when encountering recursive files at
// the end of the stream, so seeing that doesn't indicate a bug.
assert(FileStack.size() > 0 && Argv.size() == FileStack.back().End);
return AllExpanded;
}
bool cl::readConfigFile(StringRef CfgFile, StringSaver &Saver,
SmallVectorImpl<const char *> &Argv) {
SmallString<128> AbsPath;
if (sys::path::is_relative(CfgFile)) {
llvm::sys::fs::current_path(AbsPath);
llvm::sys::path::append(AbsPath, CfgFile);
CfgFile = AbsPath.str();
}
if (llvm::Error Err =
ExpandResponseFile(CfgFile, Saver, cl::tokenizeConfigFile, Argv,
/*MarkEOLs*/ false, /*RelativeNames*/ true,
*llvm::vfs::getRealFileSystem())) {
// TODO: The error should be propagated up the stack.
llvm::consumeError(std::move(Err));
return false;
}
return ExpandResponseFiles(Saver, cl::tokenizeConfigFile, Argv,
/*MarkEOLs*/ false, /*RelativeNames*/ true);
}
/// ParseEnvironmentOptions - An alternative entry point to the
/// CommandLine library, which allows you to read the program's name
/// from the caller (as PROGNAME) and its command-line arguments from
/// an environment variable (whose name is given in ENVVAR).
///
void cl::ParseEnvironmentOptions(const char *progName, const char *envVar,
const char *Overview) {
// Check args.
assert(progName && "Program name not specified");
assert(envVar && "Environment variable name missing");
// Get the environment variable they want us to parse options out of.
llvm::Optional<std::string> envValue = sys::Process::GetEnv(StringRef(envVar));
if (!envValue)
return;
// Get program's "name", which we wouldn't know without the caller
// telling us.
SmallVector<const char *, 20> newArgv;
BumpPtrAllocator A;
StringSaver Saver(A);
newArgv.push_back(Saver.save(progName).data());
// Parse the value of the environment variable into a "command line"
// and hand it off to ParseCommandLineOptions().
TokenizeGNUCommandLine(*envValue, Saver, newArgv);
int newArgc = static_cast<int>(newArgv.size());
ParseCommandLineOptions(newArgc, &newArgv[0], StringRef(Overview));
}
bool cl::ParseCommandLineOptions(int argc, const char *const *argv,
StringRef Overview, raw_ostream *Errs,
const char *EnvVar,
bool LongOptionsUseDoubleDash) {
SmallVector<const char *, 20> NewArgv;
BumpPtrAllocator A;
StringSaver Saver(A);
NewArgv.push_back(argv[0]);
// Parse options from environment variable.
if (EnvVar) {
if (llvm::Optional<std::string> EnvValue =
sys::Process::GetEnv(StringRef(EnvVar)))
TokenizeGNUCommandLine(*EnvValue, Saver, NewArgv);
}
// Append options from command line.
for (int I = 1; I < argc; ++I)
NewArgv.push_back(argv[I]);
int NewArgc = static_cast<int>(NewArgv.size());
// Parse all options.
return GlobalParser->ParseCommandLineOptions(NewArgc, &NewArgv[0], Overview,
Errs, LongOptionsUseDoubleDash);
}
void CommandLineParser::ResetAllOptionOccurrences() {
// So that we can parse different command lines multiple times in succession
// we reset all option values to look like they have never been seen before.
for (auto SC : RegisteredSubCommands) {
for (auto &O : SC->OptionsMap)
O.second->reset();
}
}
bool CommandLineParser::ParseCommandLineOptions(int argc,
const char *const *argv,
StringRef Overview,
raw_ostream *Errs,
bool LongOptionsUseDoubleDash) {
assert(hasOptions() && "No options specified!");
// Expand response files.
SmallVector<const char *, 20> newArgv(argv, argv + argc);
BumpPtrAllocator A;
StringSaver Saver(A);
ExpandResponseFiles(Saver,
Triple(sys::getProcessTriple()).isOSWindows() ?
cl::TokenizeWindowsCommandLine : cl::TokenizeGNUCommandLine,
newArgv);
argv = &newArgv[0];
argc = static_cast<int>(newArgv.size());
// Copy the program name into ProgName, making sure not to overflow it.
ProgramName = std::string(sys::path::filename(StringRef(argv[0])));
ProgramOverview = Overview;
bool IgnoreErrors = Errs;
if (!Errs)
Errs = &errs();
bool ErrorParsing = false;
// Check out the positional arguments to collect information about them.
unsigned NumPositionalRequired = 0;
// Determine whether or not there are an unlimited number of positionals
bool HasUnlimitedPositionals = false;
int FirstArg = 1;
SubCommand *ChosenSubCommand = &*TopLevelSubCommand;
if (argc >= 2 && argv[FirstArg][0] != '-') {
// If the first argument specifies a valid subcommand, start processing
// options from the second argument.
ChosenSubCommand = LookupSubCommand(StringRef(argv[FirstArg]));
if (ChosenSubCommand != &*TopLevelSubCommand)
FirstArg = 2;
}
GlobalParser->ActiveSubCommand = ChosenSubCommand;
assert(ChosenSubCommand);
auto &ConsumeAfterOpt = ChosenSubCommand->ConsumeAfterOpt;
auto &PositionalOpts = ChosenSubCommand->PositionalOpts;
auto &SinkOpts = ChosenSubCommand->SinkOpts;
auto &OptionsMap = ChosenSubCommand->OptionsMap;
for (auto O: DefaultOptions) {
addOption(O, true);
}
if (ConsumeAfterOpt) {
assert(PositionalOpts.size() > 0 &&
"Cannot specify cl::ConsumeAfter without a positional argument!");
}
if (!PositionalOpts.empty()) {
// Calculate how many positional values are _required_.
bool UnboundedFound = false;
for (size_t i = 0, e = PositionalOpts.size(); i != e; ++i) {
Option *Opt = PositionalOpts[i];
if (RequiresValue(Opt))
++NumPositionalRequired;
else if (ConsumeAfterOpt) {
// ConsumeAfter cannot be combined with "optional" positional options
// unless there is only one positional argument...
if (PositionalOpts.size() > 1) {
if (!IgnoreErrors)
Opt->error("error - this positional option will never be matched, "
"because it does not Require a value, and a "
"cl::ConsumeAfter option is active!");
ErrorParsing = true;
}
} else if (UnboundedFound && !Opt->hasArgStr()) {
// This option does not "require" a value... Make sure this option is
// not specified after an option that eats all extra arguments, or this
// one will never get any!
//
if (!IgnoreErrors)
Opt->error("error - option can never match, because "
"another positional argument will match an "
"unbounded number of values, and this option"
" does not require a value!");
*Errs << ProgramName << ": CommandLine Error: Option '" << Opt->ArgStr
<< "' is all messed up!\n";
*Errs << PositionalOpts.size();
ErrorParsing = true;
}
UnboundedFound |= EatsUnboundedNumberOfValues(Opt);
}
HasUnlimitedPositionals = UnboundedFound || ConsumeAfterOpt;
}
// PositionalVals - A vector of "positional" arguments we accumulate into
// the process at the end.
//
SmallVector<std::pair<StringRef, unsigned>, 4> PositionalVals;
// If the program has named positional arguments, and the name has been run
// across, keep track of which positional argument was named. Otherwise put
// the positional args into the PositionalVals list...
Option *ActivePositionalArg = nullptr;
// Loop over all of the arguments... processing them.
bool DashDashFound = false; // Have we read '--'?
for (int i = FirstArg; i < argc; ++i) {
Option *Handler = nullptr;
Option *NearestHandler = nullptr;
std::string NearestHandlerString;
StringRef Value;
StringRef ArgName = "";
bool HaveDoubleDash = false;
// Check to see if this is a positional argument. This argument is
// considered to be positional if it doesn't start with '-', if it is "-"
// itself, or if we have seen "--" already.
//
if (argv[i][0] != '-' || argv[i][1] == 0 || DashDashFound) {
// Positional argument!
if (ActivePositionalArg) {
ProvidePositionalOption(ActivePositionalArg, StringRef(argv[i]), i);
continue; // We are done!
}
if (!PositionalOpts.empty()) {
PositionalVals.push_back(std::make_pair(StringRef(argv[i]), i));
// All of the positional arguments have been fulfulled, give the rest to
// the consume after option... if it's specified...
//
if (PositionalVals.size() >= NumPositionalRequired && ConsumeAfterOpt) {
for (++i; i < argc; ++i)
PositionalVals.push_back(std::make_pair(StringRef(argv[i]), i));
break; // Handle outside of the argument processing loop...
}
// Delay processing positional arguments until the end...
continue;
}
} else if (argv[i][0] == '-' && argv[i][1] == '-' && argv[i][2] == 0 &&
!DashDashFound) {
DashDashFound = true; // This is the mythical "--"?
continue; // Don't try to process it as an argument itself.
} else if (ActivePositionalArg &&
(ActivePositionalArg->getMiscFlags() & PositionalEatsArgs)) {
// If there is a positional argument eating options, check to see if this
// option is another positional argument. If so, treat it as an argument,
// otherwise feed it to the eating positional.
ArgName = StringRef(argv[i] + 1);
// Eat second dash.
if (!ArgName.empty() && ArgName[0] == '-') {
HaveDoubleDash = true;
ArgName = ArgName.substr(1);
}
Handler = LookupLongOption(*ChosenSubCommand, ArgName, Value,
LongOptionsUseDoubleDash, HaveDoubleDash);
if (!Handler || Handler->getFormattingFlag() != cl::Positional) {
ProvidePositionalOption(ActivePositionalArg, StringRef(argv[i]), i);
continue; // We are done!
}
} else { // We start with a '-', must be an argument.
ArgName = StringRef(argv[i] + 1);
// Eat second dash.
if (!ArgName.empty() && ArgName[0] == '-') {
HaveDoubleDash = true;
ArgName = ArgName.substr(1);
}
Handler = LookupLongOption(*ChosenSubCommand, ArgName, Value,
LongOptionsUseDoubleDash, HaveDoubleDash);
// Check to see if this "option" is really a prefixed or grouped argument.
if (!Handler && !(LongOptionsUseDoubleDash && HaveDoubleDash))
Handler = HandlePrefixedOrGroupedOption(ArgName, Value, ErrorParsing,
OptionsMap);
// Otherwise, look for the closest available option to report to the user
// in the upcoming error.
if (!Handler && SinkOpts.empty())
NearestHandler =
LookupNearestOption(ArgName, OptionsMap, NearestHandlerString);
}
if (!Handler) {
if (SinkOpts.empty()) {
*Errs << ProgramName << ": Unknown command line argument '" << argv[i]
<< "'. Try: '" << argv[0] << " --help'\n";
if (NearestHandler) {
// If we know a near match, report it as well.
*Errs << ProgramName << ": Did you mean '"
<< PrintArg(NearestHandlerString, 0) << "'?\n";
}
ErrorParsing = true;
} else {
for (SmallVectorImpl<Option *>::iterator I = SinkOpts.begin(),
E = SinkOpts.end();
I != E; ++I)
(*I)->addOccurrence(i, "", StringRef(argv[i]));
}
continue;
}
// If this is a named positional argument, just remember that it is the
// active one...
if (Handler->getFormattingFlag() == cl::Positional) {
if ((Handler->getMiscFlags() & PositionalEatsArgs) && !Value.empty()) {
Handler->error("This argument does not take a value.\n"
"\tInstead, it consumes any positional arguments until "
"the next recognized option.", *Errs);
ErrorParsing = true;
}
ActivePositionalArg = Handler;
}
else
ErrorParsing |= ProvideOption(Handler, ArgName, Value, argc, argv, i);
}
// Check and handle positional arguments now...
if (NumPositionalRequired > PositionalVals.size()) {
*Errs << ProgramName
<< ": Not enough positional command line arguments specified!\n"
<< "Must specify at least " << NumPositionalRequired
<< " positional argument" << (NumPositionalRequired > 1 ? "s" : "")
<< ": See: " << argv[0] << " --help\n";
ErrorParsing = true;
} else if (!HasUnlimitedPositionals &&
PositionalVals.size() > PositionalOpts.size()) {
*Errs << ProgramName << ": Too many positional arguments specified!\n"
<< "Can specify at most " << PositionalOpts.size()
<< " positional arguments: See: " << argv[0] << " --help\n";
ErrorParsing = true;
} else if (!ConsumeAfterOpt) {
// Positional args have already been handled if ConsumeAfter is specified.
unsigned ValNo = 0, NumVals = static_cast<unsigned>(PositionalVals.size());
for (size_t i = 0, e = PositionalOpts.size(); i != e; ++i) {
if (RequiresValue(PositionalOpts[i])) {
ProvidePositionalOption(PositionalOpts[i], PositionalVals[ValNo].first,
PositionalVals[ValNo].second);
ValNo++;
--NumPositionalRequired; // We fulfilled our duty...
}
// If we _can_ give this option more arguments, do so now, as long as we
// do not give it values that others need. 'Done' controls whether the
// option even _WANTS_ any more.
//
bool Done = PositionalOpts[i]->getNumOccurrencesFlag() == cl::Required;
while (NumVals - ValNo > NumPositionalRequired && !Done) {
switch (PositionalOpts[i]->getNumOccurrencesFlag()) {
case cl::Optional:
Done = true; // Optional arguments want _at most_ one value
LLVM_FALLTHROUGH;
case cl::ZeroOrMore: // Zero or more will take all they can get...
case cl::OneOrMore: // One or more will take all they can get...
ProvidePositionalOption(PositionalOpts[i],
PositionalVals[ValNo].first,
PositionalVals[ValNo].second);
ValNo++;
break;
default:
llvm_unreachable("Internal error, unexpected NumOccurrences flag in "
"positional argument processing!");
}
}
}
} else {
assert(ConsumeAfterOpt && NumPositionalRequired <= PositionalVals.size());
unsigned ValNo = 0;
for (size_t J = 0, E = PositionalOpts.size(); J != E; ++J)
if (RequiresValue(PositionalOpts[J])) {
ErrorParsing |= ProvidePositionalOption(PositionalOpts[J],
PositionalVals[ValNo].first,
PositionalVals[ValNo].second);
ValNo++;
}
// Handle the case where there is just one positional option, and it's
// optional. In this case, we want to give JUST THE FIRST option to the
// positional option and keep the rest for the consume after. The above
// loop would have assigned no values to positional options in this case.
//
if (PositionalOpts.size() == 1 && ValNo == 0 && !PositionalVals.empty()) {
ErrorParsing |= ProvidePositionalOption(PositionalOpts[0],
PositionalVals[ValNo].first,
PositionalVals[ValNo].second);
ValNo++;
}
// Handle over all of the rest of the arguments to the
// cl::ConsumeAfter command line option...
for (; ValNo != PositionalVals.size(); ++ValNo)
ErrorParsing |=
ProvidePositionalOption(ConsumeAfterOpt, PositionalVals[ValNo].first,
PositionalVals[ValNo].second);
}
// Loop over args and make sure all required args are specified!
for (const auto &Opt : OptionsMap) {
switch (Opt.second->getNumOccurrencesFlag()) {
case Required:
case OneOrMore:
if (Opt.second->getNumOccurrences() == 0) {
Opt.second->error("must be specified at least once!");
ErrorParsing = true;
}
LLVM_FALLTHROUGH;
default:
break;
}
}
// Now that we know if -debug is specified, we can use it.
// Note that if ReadResponseFiles == true, this must be done before the
// memory allocated for the expanded command line is free()d below.
LLVM_DEBUG(dbgs() << "Args: ";
for (int i = 0; i < argc; ++i) dbgs() << argv[i] << ' ';
dbgs() << '\n';);
// Free all of the memory allocated to the map. Command line options may only
// be processed once!
MoreHelp.clear();
// If we had an error processing our arguments, don't let the program execute
if (ErrorParsing) {
if (!IgnoreErrors)
exit(1);
return false;
}
return true;
}
//===----------------------------------------------------------------------===//
// Option Base class implementation
//
bool Option::error(const Twine &Message, StringRef ArgName, raw_ostream &Errs) {
if (!ArgName.data())
ArgName = ArgStr;
if (ArgName.empty())
Errs << HelpStr; // Be nice for positional arguments
else
Errs << GlobalParser->ProgramName << ": for the " << PrintArg(ArgName, 0);
Errs << " option: " << Message << "\n";
return true;
}
bool Option::addOccurrence(unsigned pos, StringRef ArgName, StringRef Value,
bool MultiArg) {
if (!MultiArg)
NumOccurrences++; // Increment the number of times we have been seen
switch (getNumOccurrencesFlag()) {
case Optional:
if (NumOccurrences > 1)
return error("may only occur zero or one times!", ArgName);
break;
case Required:
if (NumOccurrences > 1)
return error("must occur exactly one time!", ArgName);
LLVM_FALLTHROUGH;
case OneOrMore:
case ZeroOrMore:
case ConsumeAfter:
break;
}
return handleOccurrence(pos, ArgName, Value);
}
// getValueStr - Get the value description string, using "DefaultMsg" if nothing
// has been specified yet.
//
static StringRef getValueStr(const Option &O, StringRef DefaultMsg) {
if (O.ValueStr.empty())
return DefaultMsg;
return O.ValueStr;
}
//===----------------------------------------------------------------------===//
// cl::alias class implementation
//
// Return the width of the option tag for printing...
size_t alias::getOptionWidth() const {
return argPlusPrefixesSize(ArgStr);
}
void Option::printHelpStr(StringRef HelpStr, size_t Indent,
size_t FirstLineIndentedBy) {
assert(Indent >= FirstLineIndentedBy);
std::pair<StringRef, StringRef> Split = HelpStr.split('\n');
outs().indent(Indent - FirstLineIndentedBy)
<< ArgHelpPrefix << Split.first << "\n";
while (!Split.second.empty()) {
Split = Split.second.split('\n');
outs().indent(Indent) << Split.first << "\n";
}
}
// Print out the option for the alias.
void alias::printOptionInfo(size_t GlobalWidth) const {
outs() << PrintArg(ArgStr);
printHelpStr(HelpStr, GlobalWidth, argPlusPrefixesSize(ArgStr));
}
//===----------------------------------------------------------------------===//
// Parser Implementation code...
//
// basic_parser implementation
//
// Return the width of the option tag for printing...
size_t basic_parser_impl::getOptionWidth(const Option &O) const {
size_t Len = argPlusPrefixesSize(O.ArgStr);
auto ValName = getValueName();
if (!ValName.empty()) {
size_t FormattingLen = 3;
if (O.getMiscFlags() & PositionalEatsArgs)
FormattingLen = 6;
Len += getValueStr(O, ValName).size() + FormattingLen;
}
return Len;
}
// printOptionInfo - Print out information about this option. The
// to-be-maintained width is specified.
//
void basic_parser_impl::printOptionInfo(const Option &O,
size_t GlobalWidth) const {
outs() << PrintArg(O.ArgStr);
auto ValName = getValueName();
if (!ValName.empty()) {
if (O.getMiscFlags() & PositionalEatsArgs) {
outs() << " <" << getValueStr(O, ValName) << ">...";
} else if (O.getValueExpectedFlag() == ValueOptional)
outs() << "[=<" << getValueStr(O, ValName) << ">]";
else
outs() << "=<" << getValueStr(O, ValName) << '>';
}
Option::printHelpStr(O.HelpStr, GlobalWidth, getOptionWidth(O));
}
void basic_parser_impl::printOptionName(const Option &O,
size_t GlobalWidth) const {
outs() << PrintArg(O.ArgStr);
outs().indent(GlobalWidth - O.ArgStr.size());
}
// parser<bool> implementation
//
bool parser<bool>::parse(Option &O, StringRef ArgName, StringRef Arg,
bool &Value) {
if (Arg == "" || Arg == "true" || Arg == "TRUE" || Arg == "True" ||
Arg == "1") {
Value = true;
return false;
}
if (Arg == "false" || Arg == "FALSE" || Arg == "False" || Arg == "0") {
Value = false;
return false;
}
return O.error("'" + Arg +
"' is invalid value for boolean argument! Try 0 or 1");
}
// parser<boolOrDefault> implementation
//
bool parser<boolOrDefault>::parse(Option &O, StringRef ArgName, StringRef Arg,
boolOrDefault &Value) {
if (Arg == "" || Arg == "true" || Arg == "TRUE" || Arg == "True" ||
Arg == "1") {
Value = BOU_TRUE;
return false;
}
if (Arg == "false" || Arg == "FALSE" || Arg == "False" || Arg == "0") {
Value = BOU_FALSE;
return false;
}
return O.error("'" + Arg +
"' is invalid value for boolean argument! Try 0 or 1");
}
// parser<int> implementation
//
bool parser<int>::parse(Option &O, StringRef ArgName, StringRef Arg,
int &Value) {
if (Arg.getAsInteger(0, Value))
return O.error("'" + Arg + "' value invalid for integer argument!");
return false;
}
// parser<long> implementation
//
bool parser<long>::parse(Option &O, StringRef ArgName, StringRef Arg,
long &Value) {
if (Arg.getAsInteger(0, Value))
return O.error("'" + Arg + "' value invalid for long argument!");
return false;
}
// parser<long long> implementation
//
bool parser<long long>::parse(Option &O, StringRef ArgName, StringRef Arg,
long long &Value) {
if (Arg.getAsInteger(0, Value))
return O.error("'" + Arg + "' value invalid for llong argument!");
return false;
}
// parser<unsigned> implementation
//
bool parser<unsigned>::parse(Option &O, StringRef ArgName, StringRef Arg,
unsigned &Value) {
if (Arg.getAsInteger(0, Value))
return O.error("'" + Arg + "' value invalid for uint argument!");
return false;
}
// parser<unsigned long> implementation
//
bool parser<unsigned long>::parse(Option &O, StringRef ArgName, StringRef Arg,
unsigned long &Value) {
if (Arg.getAsInteger(0, Value))
return O.error("'" + Arg + "' value invalid for ulong argument!");
return false;
}
// parser<unsigned long long> implementation
//
bool parser<unsigned long long>::parse(Option &O, StringRef ArgName,
StringRef Arg,
unsigned long long &Value) {
if (Arg.getAsInteger(0, Value))
return O.error("'" + Arg + "' value invalid for ullong argument!");
return false;
}
// parser<double>/parser<float> implementation
//
static bool parseDouble(Option &O, StringRef Arg, double &Value) {
if (to_float(Arg, Value))
return false;
return O.error("'" + Arg + "' value invalid for floating point argument!");
}
bool parser<double>::parse(Option &O, StringRef ArgName, StringRef Arg,
double &Val) {
return parseDouble(O, Arg, Val);
}
bool parser<float>::parse(Option &O, StringRef ArgName, StringRef Arg,
float &Val) {
double dVal;
if (parseDouble(O, Arg, dVal))
return true;
Val = (float)dVal;
return false;
}
// generic_parser_base implementation
//
// findOption - Return the option number corresponding to the specified
// argument string. If the option is not found, getNumOptions() is returned.
//
unsigned generic_parser_base::findOption(StringRef Name) {
unsigned e = getNumOptions();
for (unsigned i = 0; i != e; ++i) {
if (getOption(i) == Name)
return i;
}
return e;
}
static StringRef EqValue = "=<value>";
static StringRef EmptyOption = "<empty>";
static StringRef OptionPrefix = " =";
static size_t OptionPrefixesSize = OptionPrefix.size() + ArgHelpPrefix.size();
static bool shouldPrintOption(StringRef Name, StringRef Description,
const Option &O) {
return O.getValueExpectedFlag() != ValueOptional || !Name.empty() ||
!Description.empty();
}
// Return the width of the option tag for printing...
size_t generic_parser_base::getOptionWidth(const Option &O) const {
if (O.hasArgStr()) {
size_t Size =
argPlusPrefixesSize(O.ArgStr) + EqValue.size();
for (unsigned i = 0, e = getNumOptions(); i != e; ++i) {
StringRef Name = getOption(i);
if (!shouldPrintOption(Name, getDescription(i), O))
continue;
size_t NameSize = Name.empty() ? EmptyOption.size() : Name.size();
Size = std::max(Size, NameSize + OptionPrefixesSize);
}
return Size;
} else {
size_t BaseSize = 0;
for (unsigned i = 0, e = getNumOptions(); i != e; ++i)
BaseSize = std::max(BaseSize, getOption(i).size() + 8);
return BaseSize;
}
}
// printOptionInfo - Print out information about this option. The
// to-be-maintained width is specified.
//
void generic_parser_base::printOptionInfo(const Option &O,
size_t GlobalWidth) const {
if (O.hasArgStr()) {
// When the value is optional, first print a line just describing the
// option without values.
if (O.getValueExpectedFlag() == ValueOptional) {
for (unsigned i = 0, e = getNumOptions(); i != e; ++i) {
if (getOption(i).empty()) {
outs() << PrintArg(O.ArgStr);
Option::printHelpStr(O.HelpStr, GlobalWidth,
argPlusPrefixesSize(O.ArgStr));
break;
}
}
}
outs() << PrintArg(O.ArgStr) << EqValue;
Option::printHelpStr(O.HelpStr, GlobalWidth,
EqValue.size() +
argPlusPrefixesSize(O.ArgStr));
for (unsigned i = 0, e = getNumOptions(); i != e; ++i) {
StringRef OptionName = getOption(i);
StringRef Description = getDescription(i);
if (!shouldPrintOption(OptionName, Description, O))
continue;
assert(GlobalWidth >= OptionName.size() + OptionPrefixesSize);
size_t NumSpaces = GlobalWidth - OptionName.size() - OptionPrefixesSize;
outs() << OptionPrefix << OptionName;
if (OptionName.empty()) {
outs() << EmptyOption;
assert(NumSpaces >= EmptyOption.size());
NumSpaces -= EmptyOption.size();
}
if (!Description.empty())
outs().indent(NumSpaces) << ArgHelpPrefix << " " << Description;
outs() << '\n';
}
} else {
if (!O.HelpStr.empty())
outs() << " " << O.HelpStr << '\n';
for (unsigned i = 0, e = getNumOptions(); i != e; ++i) {
StringRef Option = getOption(i);
outs() << " " << PrintArg(Option);
Option::printHelpStr(getDescription(i), GlobalWidth, Option.size() + 8);
}
}
}
static const size_t MaxOptWidth = 8; // arbitrary spacing for printOptionDiff
// printGenericOptionDiff - Print the value of this option and it's default.
//
// "Generic" options have each value mapped to a name.
void generic_parser_base::printGenericOptionDiff(
const Option &O, const GenericOptionValue &Value,
const GenericOptionValue &Default, size_t GlobalWidth) const {
outs() << " " << PrintArg(O.ArgStr);
outs().indent(GlobalWidth - O.ArgStr.size());
unsigned NumOpts = getNumOptions();
for (unsigned i = 0; i != NumOpts; ++i) {
if (Value.compare(getOptionValue(i)))
continue;
outs() << "= " << getOption(i);
size_t L = getOption(i).size();
size_t NumSpaces = MaxOptWidth > L ? MaxOptWidth - L : 0;
outs().indent(NumSpaces) << " (default: ";
for (unsigned j = 0; j != NumOpts; ++j) {
if (Default.compare(getOptionValue(j)))
continue;
outs() << getOption(j);
break;
}
outs() << ")\n";
return;
}
outs() << "= *unknown option value*\n";
}
// printOptionDiff - Specializations for printing basic value types.
//
#define PRINT_OPT_DIFF(T) \
void parser<T>::printOptionDiff(const Option &O, T V, OptionValue<T> D, \
size_t GlobalWidth) const { \
printOptionName(O, GlobalWidth); \
std::string Str; \
{ \
raw_string_ostream SS(Str); \
SS << V; \
} \
outs() << "= " << Str; \
size_t NumSpaces = \
MaxOptWidth > Str.size() ? MaxOptWidth - Str.size() : 0; \
outs().indent(NumSpaces) << " (default: "; \
if (D.hasValue()) \
outs() << D.getValue(); \
else \
outs() << "*no default*"; \
outs() << ")\n"; \
}
PRINT_OPT_DIFF(bool)
PRINT_OPT_DIFF(boolOrDefault)
PRINT_OPT_DIFF(int)
PRINT_OPT_DIFF(long)
PRINT_OPT_DIFF(long long)
PRINT_OPT_DIFF(unsigned)
PRINT_OPT_DIFF(unsigned long)
PRINT_OPT_DIFF(unsigned long long)
PRINT_OPT_DIFF(double)
PRINT_OPT_DIFF(float)
PRINT_OPT_DIFF(char)
void parser<std::string>::printOptionDiff(const Option &O, StringRef V,
const OptionValue<std::string> &D,
size_t GlobalWidth) const {
printOptionName(O, GlobalWidth);
outs() << "= " << V;
size_t NumSpaces = MaxOptWidth > V.size() ? MaxOptWidth - V.size() : 0;
outs().indent(NumSpaces) << " (default: ";
if (D.hasValue())
outs() << D.getValue();
else
outs() << "*no default*";
outs() << ")\n";
}
// Print a placeholder for options that don't yet support printOptionDiff().
void basic_parser_impl::printOptionNoValue(const Option &O,
size_t GlobalWidth) const {
printOptionName(O, GlobalWidth);
outs() << "= *cannot print option value*\n";
}
//===----------------------------------------------------------------------===//
// -help and -help-hidden option implementation
//
static int OptNameCompare(const std::pair<const char *, Option *> *LHS,
const std::pair<const char *, Option *> *RHS) {
return strcmp(LHS->first, RHS->first);
}
static int SubNameCompare(const std::pair<const char *, SubCommand *> *LHS,
const std::pair<const char *, SubCommand *> *RHS) {
return strcmp(LHS->first, RHS->first);
}
// Copy Options into a vector so we can sort them as we like.
static void sortOpts(StringMap<Option *> &OptMap,
SmallVectorImpl<std::pair<const char *, Option *>> &Opts,
bool ShowHidden) {
SmallPtrSet<Option *, 32> OptionSet; // Duplicate option detection.
for (StringMap<Option *>::iterator I = OptMap.begin(), E = OptMap.end();
I != E; ++I) {
// Ignore really-hidden options.
if (I->second->getOptionHiddenFlag() == ReallyHidden)
continue;
// Unless showhidden is set, ignore hidden flags.
if (I->second->getOptionHiddenFlag() == Hidden && !ShowHidden)
continue;
// If we've already seen this option, don't add it to the list again.
if (!OptionSet.insert(I->second).second)
continue;
Opts.push_back(
std::pair<const char *, Option *>(I->getKey().data(), I->second));
}
// Sort the options list alphabetically.
array_pod_sort(Opts.begin(), Opts.end(), OptNameCompare);
}
static void
sortSubCommands(const SmallPtrSetImpl<SubCommand *> &SubMap,
SmallVectorImpl<std::pair<const char *, SubCommand *>> &Subs) {
for (auto *S : SubMap) {
if (S->getName().empty())
continue;
Subs.push_back(std::make_pair(S->getName().data(), S));
}
array_pod_sort(Subs.begin(), Subs.end(), SubNameCompare);
}
namespace {
class HelpPrinter {
protected:
const bool ShowHidden;
typedef SmallVector<std::pair<const char *, Option *>, 128>
StrOptionPairVector;
typedef SmallVector<std::pair<const char *, SubCommand *>, 128>
StrSubCommandPairVector;
// Print the options. Opts is assumed to be alphabetically sorted.
virtual void printOptions(StrOptionPairVector &Opts, size_t MaxArgLen) {
for (size_t i = 0, e = Opts.size(); i != e; ++i)
Opts[i].second->printOptionInfo(MaxArgLen);
}
void printSubCommands(StrSubCommandPairVector &Subs, size_t MaxSubLen) {
for (const auto &S : Subs) {
outs() << " " << S.first;
if (!S.second->getDescription().empty()) {
outs().indent(MaxSubLen - strlen(S.first));
outs() << " - " << S.second->getDescription();
}
outs() << "\n";
}
}
public:
explicit HelpPrinter(bool showHidden) : ShowHidden(showHidden) {}
virtual ~HelpPrinter() {}
// Invoke the printer.
void operator=(bool Value) {
if (!Value)
return;
printHelp();
// Halt the program since help information was printed
exit(0);
}
void printHelp() {
SubCommand *Sub = GlobalParser->getActiveSubCommand();
auto &OptionsMap = Sub->OptionsMap;
auto &PositionalOpts = Sub->PositionalOpts;
auto &ConsumeAfterOpt = Sub->ConsumeAfterOpt;
StrOptionPairVector Opts;
sortOpts(OptionsMap, Opts, ShowHidden);
StrSubCommandPairVector Subs;
sortSubCommands(GlobalParser->RegisteredSubCommands, Subs);
if (!GlobalParser->ProgramOverview.empty())
outs() << "OVERVIEW: " << GlobalParser->ProgramOverview << "\n";
if (Sub == &*TopLevelSubCommand) {
outs() << "USAGE: " << GlobalParser->ProgramName;
if (Subs.size() > 2)
outs() << " [subcommand]";
outs() << " [options]";
} else {
if (!Sub->getDescription().empty()) {
outs() << "SUBCOMMAND '" << Sub->getName()
<< "': " << Sub->getDescription() << "\n\n";
}
outs() << "USAGE: " << GlobalParser->ProgramName << " " << Sub->getName()
<< " [options]";
}
for (auto Opt : PositionalOpts) {
if (Opt->hasArgStr())
outs() << " --" << Opt->ArgStr;
outs() << " " << Opt->HelpStr;
}
// Print the consume after option info if it exists...
if (ConsumeAfterOpt)
outs() << " " << ConsumeAfterOpt->HelpStr;
if (Sub == &*TopLevelSubCommand && !Subs.empty()) {
// Compute the maximum subcommand length...
size_t MaxSubLen = 0;
for (size_t i = 0, e = Subs.size(); i != e; ++i)
MaxSubLen = std::max(MaxSubLen, strlen(Subs[i].first));
outs() << "\n\n";
outs() << "SUBCOMMANDS:\n\n";
printSubCommands(Subs, MaxSubLen);
outs() << "\n";
outs() << " Type \"" << GlobalParser->ProgramName
<< " <subcommand> --help\" to get more help on a specific "
"subcommand";
}
outs() << "\n\n";
// Compute the maximum argument length...
size_t MaxArgLen = 0;
for (size_t i = 0, e = Opts.size(); i != e; ++i)
MaxArgLen = std::max(MaxArgLen, Opts[i].second->getOptionWidth());
outs() << "OPTIONS:\n";
printOptions(Opts, MaxArgLen);
// Print any extra help the user has declared.
for (auto I : GlobalParser->MoreHelp)
outs() << I;
GlobalParser->MoreHelp.clear();
}
};
class CategorizedHelpPrinter : public HelpPrinter {
public:
explicit CategorizedHelpPrinter(bool showHidden) : HelpPrinter(showHidden) {}
// Helper function for printOptions().
// It shall return a negative value if A's name should be lexicographically
// ordered before B's name. It returns a value greater than zero if B's name
// should be ordered before A's name, and it returns 0 otherwise.
static int OptionCategoryCompare(OptionCategory *const *A,
OptionCategory *const *B) {
return (*A)->getName().compare((*B)->getName());
}
// Make sure we inherit our base class's operator=()
using HelpPrinter::operator=;
protected:
void printOptions(StrOptionPairVector &Opts, size_t MaxArgLen) override {
std::vector<OptionCategory *> SortedCategories;
std::map<OptionCategory *, std::vector<Option *>> CategorizedOptions;
// Collect registered option categories into vector in preparation for
// sorting.
for (auto I = GlobalParser->RegisteredOptionCategories.begin(),
E = GlobalParser->RegisteredOptionCategories.end();
I != E; ++I) {
SortedCategories.push_back(*I);
}
// Sort the different option categories alphabetically.
assert(SortedCategories.size() > 0 && "No option categories registered!");
array_pod_sort(SortedCategories.begin(), SortedCategories.end(),
OptionCategoryCompare);
// Create map to empty vectors.
for (std::vector<OptionCategory *>::const_iterator
I = SortedCategories.begin(),
E = SortedCategories.end();
I != E; ++I)
CategorizedOptions[*I] = std::vector<Option *>();
// Walk through pre-sorted options and assign into categories.
// Because the options are already alphabetically sorted the
// options within categories will also be alphabetically sorted.
for (size_t I = 0, E = Opts.size(); I != E; ++I) {
Option *Opt = Opts[I].second;
for (auto &Cat : Opt->Categories) {
assert(CategorizedOptions.count(Cat) > 0 &&
"Option has an unregistered category");
CategorizedOptions[Cat].push_back(Opt);
}
}
// Now do printing.
for (std::vector<OptionCategory *>::const_iterator
Category = SortedCategories.begin(),
E = SortedCategories.end();
Category != E; ++Category) {
// Hide empty categories for --help, but show for --help-hidden.
const auto &CategoryOptions = CategorizedOptions[*Category];
bool IsEmptyCategory = CategoryOptions.empty();
if (!ShowHidden && IsEmptyCategory)
continue;
// Print category information.
outs() << "\n";
outs() << (*Category)->getName() << ":\n";
// Check if description is set.
if (!(*Category)->getDescription().empty())
outs() << (*Category)->getDescription() << "\n\n";
else
outs() << "\n";
// When using --help-hidden explicitly state if the category has no
// options associated with it.
if (IsEmptyCategory) {
outs() << " This option category has no options.\n";
continue;
}
// Loop over the options in the category and print.
for (const Option *Opt : CategoryOptions)
Opt->printOptionInfo(MaxArgLen);
}
}
};
// This wraps the Uncategorizing and Categorizing printers and decides
// at run time which should be invoked.
class HelpPrinterWrapper {
private:
HelpPrinter &UncategorizedPrinter;
CategorizedHelpPrinter &CategorizedPrinter;
public:
explicit HelpPrinterWrapper(HelpPrinter &UncategorizedPrinter,
CategorizedHelpPrinter &CategorizedPrinter)
: UncategorizedPrinter(UncategorizedPrinter),
CategorizedPrinter(CategorizedPrinter) {}
// Invoke the printer.
void operator=(bool Value);
};
} // End anonymous namespace
// Declare the four HelpPrinter instances that are used to print out help, or
// help-hidden as an uncategorized list or in categories.
static HelpPrinter UncategorizedNormalPrinter(false);
static HelpPrinter UncategorizedHiddenPrinter(true);
static CategorizedHelpPrinter CategorizedNormalPrinter(false);
static CategorizedHelpPrinter CategorizedHiddenPrinter(true);
// Declare HelpPrinter wrappers that will decide whether or not to invoke
// a categorizing help printer
static HelpPrinterWrapper WrappedNormalPrinter(UncategorizedNormalPrinter,
CategorizedNormalPrinter);
static HelpPrinterWrapper WrappedHiddenPrinter(UncategorizedHiddenPrinter,
CategorizedHiddenPrinter);
// Define a category for generic options that all tools should have.
static cl::OptionCategory GenericCategory("Generic Options");
// Define uncategorized help printers.
// --help-list is hidden by default because if Option categories are being used
// then --help behaves the same as --help-list.
static cl::opt<HelpPrinter, true, parser<bool>> HLOp(
"help-list",
cl::desc("Display list of available options (--help-list-hidden for more)"),
cl::location(UncategorizedNormalPrinter), cl::Hidden, cl::ValueDisallowed,
cl::cat(GenericCategory), cl::sub(*AllSubCommands));
static cl::opt<HelpPrinter, true, parser<bool>>
HLHOp("help-list-hidden", cl::desc("Display list of all available options"),
cl::location(UncategorizedHiddenPrinter), cl::Hidden,
cl::ValueDisallowed, cl::cat(GenericCategory),
cl::sub(*AllSubCommands));
// Define uncategorized/categorized help printers. These printers change their
// behaviour at runtime depending on whether one or more Option categories have
// been declared.
static cl::opt<HelpPrinterWrapper, true, parser<bool>>
HOp("help", cl::desc("Display available options (--help-hidden for more)"),
cl::location(WrappedNormalPrinter), cl::ValueDisallowed,
cl::cat(GenericCategory), cl::sub(*AllSubCommands));
static cl::alias HOpA("h", cl::desc("Alias for --help"), cl::aliasopt(HOp),
cl::DefaultOption);
static cl::opt<HelpPrinterWrapper, true, parser<bool>>
HHOp("help-hidden", cl::desc("Display all available options"),
cl::location(WrappedHiddenPrinter), cl::Hidden, cl::ValueDisallowed,
cl::cat(GenericCategory), cl::sub(*AllSubCommands));
static cl::opt<bool> PrintOptions(
"print-options",
cl::desc("Print non-default options after command line parsing"),
cl::Hidden, cl::init(false), cl::cat(GenericCategory),
cl::sub(*AllSubCommands));
static cl::opt<bool> PrintAllOptions(
"print-all-options",
cl::desc("Print all option values after command line parsing"), cl::Hidden,
cl::init(false), cl::cat(GenericCategory), cl::sub(*AllSubCommands));
void HelpPrinterWrapper::operator=(bool Value) {
if (!Value)
return;
// Decide which printer to invoke. If more than one option category is
// registered then it is useful to show the categorized help instead of
// uncategorized help.
if (GlobalParser->RegisteredOptionCategories.size() > 1) {
// unhide --help-list option so user can have uncategorized output if they
// want it.
HLOp.setHiddenFlag(NotHidden);
CategorizedPrinter = true; // Invoke categorized printer
} else
UncategorizedPrinter = true; // Invoke uncategorized printer
}
// Print the value of each option.
void cl::PrintOptionValues() { GlobalParser->printOptionValues(); }
void CommandLineParser::printOptionValues() {
if (!PrintOptions && !PrintAllOptions)
return;
SmallVector<std::pair<const char *, Option *>, 128> Opts;
sortOpts(ActiveSubCommand->OptionsMap, Opts, /*ShowHidden*/ true);
// Compute the maximum argument length...
size_t MaxArgLen = 0;
for (size_t i = 0, e = Opts.size(); i != e; ++i)
MaxArgLen = std::max(MaxArgLen, Opts[i].second->getOptionWidth());
for (size_t i = 0, e = Opts.size(); i != e; ++i)
Opts[i].second->printOptionValue(MaxArgLen, PrintAllOptions);
}
static VersionPrinterTy OverrideVersionPrinter = nullptr;
static std::vector<VersionPrinterTy> *ExtraVersionPrinters = nullptr;
#if defined(__GNUC__)
// GCC and GCC-compatible compilers define __OPTIMIZE__ when optimizations are
// enabled.
# if defined(__OPTIMIZE__)
# define LLVM_IS_DEBUG_BUILD 0
# else
# define LLVM_IS_DEBUG_BUILD 1
# endif
#elif defined(_MSC_VER)
// MSVC doesn't have a predefined macro indicating if optimizations are enabled.
// Use _DEBUG instead. This macro actually corresponds to the choice between
// debug and release CRTs, but it is a reasonable proxy.
# if defined(_DEBUG)
# define LLVM_IS_DEBUG_BUILD 1
# else
# define LLVM_IS_DEBUG_BUILD 0
# endif
#else
// Otherwise, for an unknown compiler, assume this is an optimized build.
# define LLVM_IS_DEBUG_BUILD 0
#endif
namespace {
class VersionPrinter {
public:
void print() {
raw_ostream &OS = outs();
#ifdef PACKAGE_VENDOR
OS << PACKAGE_VENDOR << " ";
#else
OS << "LLVM (http://llvm.org/):\n ";
#endif
OS << PACKAGE_NAME << " version " << PACKAGE_VERSION;
#ifdef LLVM_VERSION_INFO
OS << " " << LLVM_VERSION_INFO;
#endif
OS << "\n ";
#if LLVM_IS_DEBUG_BUILD
OS << "DEBUG build";
#else
OS << "Optimized build";
#endif
#ifndef NDEBUG
OS << " with assertions";
#endif
#if LLVM_VERSION_PRINTER_SHOW_HOST_TARGET_INFO
std::string CPU = std::string(sys::getHostCPUName());
if (CPU == "generic")
CPU = "(unknown)";
OS << ".\n"
<< " Default target: " << sys::getDefaultTargetTriple() << '\n'
<< " Host CPU: " << CPU;
#endif
OS << '\n';
}
void operator=(bool OptionWasSpecified) {
if (!OptionWasSpecified)
return;
if (OverrideVersionPrinter != nullptr) {
OverrideVersionPrinter(outs());
exit(0);
}
print();
// Iterate over any registered extra printers and call them to add further
// information.
if (ExtraVersionPrinters != nullptr) {
outs() << '\n';
for (auto I : *ExtraVersionPrinters)
I(outs());
}
exit(0);
}
};
} // End anonymous namespace
// Define the --version option that prints out the LLVM version for the tool
static VersionPrinter VersionPrinterInstance;
static cl::opt<VersionPrinter, true, parser<bool>>
VersOp("version", cl::desc("Display the version of this program"),
cl::location(VersionPrinterInstance), cl::ValueDisallowed,
cl::cat(GenericCategory));
// Utility function for printing the help message.
void cl::PrintHelpMessage(bool Hidden, bool Categorized) {
if (!Hidden && !Categorized)
UncategorizedNormalPrinter.printHelp();
else if (!Hidden && Categorized)
CategorizedNormalPrinter.printHelp();
else if (Hidden && !Categorized)
UncategorizedHiddenPrinter.printHelp();
else
CategorizedHiddenPrinter.printHelp();
}
/// Utility function for printing version number.
void cl::PrintVersionMessage() { VersionPrinterInstance.print(); }
void cl::SetVersionPrinter(VersionPrinterTy func) { OverrideVersionPrinter = func; }
void cl::AddExtraVersionPrinter(VersionPrinterTy func) {
if (!ExtraVersionPrinters)
ExtraVersionPrinters = new std::vector<VersionPrinterTy>;
ExtraVersionPrinters->push_back(func);
}
StringMap<Option *> &cl::getRegisteredOptions(SubCommand &Sub) {
auto &Subs = GlobalParser->RegisteredSubCommands;
(void)Subs;
assert(is_contained(Subs, &Sub));
return Sub.OptionsMap;
}
iterator_range<typename SmallPtrSet<SubCommand *, 4>::iterator>
cl::getRegisteredSubcommands() {
return GlobalParser->getRegisteredSubcommands();
}
void cl::HideUnrelatedOptions(cl::OptionCategory &Category, SubCommand &Sub) {
for (auto &I : Sub.OptionsMap) {
for (auto &Cat : I.second->Categories) {
if (Cat != &Category &&
Cat != &GenericCategory)
I.second->setHiddenFlag(cl::ReallyHidden);
}
}
}
void cl::HideUnrelatedOptions(ArrayRef<const cl::OptionCategory *> Categories,
SubCommand &Sub) {
for (auto &I : Sub.OptionsMap) {
for (auto &Cat : I.second->Categories) {
if (find(Categories, Cat) == Categories.end() && Cat != &GenericCategory)
I.second->setHiddenFlag(cl::ReallyHidden);
}
}
}
void cl::ResetCommandLineParser() { GlobalParser->reset(); }
void cl::ResetAllOptionOccurrences() {
GlobalParser->ResetAllOptionOccurrences();
}
void LLVMParseCommandLineOptions(int argc, const char *const *argv,
const char *Overview) {
llvm::cl::ParseCommandLineOptions(argc, argv, StringRef(Overview),
&llvm::nulls());
}
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