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Update git-llvm script to push to GitHub
Summary: Note: This patch should not be pushed until SVN has become read-only. It should be the first patch committed directly to GitHub. This patch updates git-llvm to check for merge commits and then push changes to GitHub if none are found. All logic related to SVN has been removed. Reviewers: jyknight Subscribers: lenary, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D67772
This commit is contained in:
Tom Stellard
parent
399f8b5b40
commit
765d042114
@ -13,6 +13,17 @@ git-llvm integration
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====================
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This file provides integration for git.
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The git llvm push sub-command can be used to push changes to GitHub. It is
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designed to be a thin wrapper around git, and its main purpose is to
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detect and prevent merge commits from being pushed to the main repository.
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Usage:
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git-llvm push <upstream-branch>
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This will push changes from the current HEAD to the branch <upstream-branch>.
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"""
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from __future__ import print_function
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@ -24,6 +35,8 @@ import shutil
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import subprocess
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import sys
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import time
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import getpass
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import github
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assert sys.version_info >= (2, 7)
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try:
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@ -78,6 +91,10 @@ VERBOSE = False
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QUIET = False
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dev_null_fd = None
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GIT_ORG = 'llvm'
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GIT_REPO = 'llvm-project'
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GIT_URL = 'github.com/{}/{}.git'.format(GIT_ORG, GIT_REPO)
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def eprint(*args, **kwargs):
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print(*args, file=sys.stderr, **kwargs)
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@ -115,14 +132,6 @@ def ask_confirm(prompt):
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return query.lower() == 'y'
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def split_first_path_component(d):
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# Assuming we have a git path, it'll use slashes even on windows...I hope.
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if '/' in d:
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return d.split('/', 1)
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else:
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return (d, None)
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def get_dev_null():
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"""Lazily create a /dev/null fd for use in shell()"""
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global dev_null_fd
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@ -132,7 +141,7 @@ def get_dev_null():
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def shell(cmd, strip=True, cwd=None, stdin=None, die_on_failure=True,
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ignore_errors=False, text=True):
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ignore_errors=False, text=True, print_raw_stderr=False):
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# Escape args when logging for easy repro.
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quoted_cmd = [quote(arg) for arg in cmd]
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log_verbose('Running in %s: %s' % (cwd, ' '.join(quoted_cmd)))
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@ -153,6 +162,7 @@ def shell(cmd, strip=True, cwd=None, stdin=None, die_on_failure=True,
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if p.returncode == 0 or ignore_errors:
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if stderr and not ignore_errors:
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if not print_raw_stderr:
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eprint('`%s` printed to stderr:' % ' '.join(quoted_cmd))
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eprint(stderr.rstrip())
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if strip:
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@ -190,284 +200,58 @@ def program_exists(cmd):
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return False
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def get_default_rev_range():
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# Get the newest common ancestor between HEAD and our upstream branch.
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upstream_rev = git('merge-base', 'HEAD', '@{upstream}', ignore_errors=True)
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if not upstream_rev:
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eprint("Warning: git-llvm assumes that origin/master is the upstream "
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"branch but git does not.")
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eprint("To make this warning go away: git branch -u origin/master")
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eprint("To avoid this warning when creating branches: "
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"git checkout -b MyBranchName origin/master")
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upstream_rev = git('merge-base', 'HEAD', 'origin/master')
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return '%s..' % upstream_rev
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def get_fetch_url():
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return 'https://{}'.format(GIT_URL)
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def get_revs_to_push(rev_range):
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if not rev_range:
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rev_range = get_default_rev_range()
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# Use git show rather than some plumbing command to figure out which revs
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# are in rev_range because it handles single revs (HEAD^) and ranges
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# (foo..bar) like we want.
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return git('show', '--reverse', '--quiet',
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'--pretty=%h', rev_range).splitlines()
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def get_push_url(user='', token='', ssh=False):
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if ssh:
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return 'ssh://{}'.format(GIT_URL)
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return 'https://{}@{}'.format(token, GIT_URL)
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def clean_svn(svn_repo):
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svn(svn_repo, 'revert', '-R', '.')
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def get_revs_to_push(branch):
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# Fetch the latest upstream to determine which commits will be pushed.
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git('fetch', get_fetch_url(), branch)
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# Unfortunately it appears there's no svn equivalent for git clean, so we
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# have to do it ourselves.
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for line in svn(svn_repo, 'status', '--no-ignore').split('\n'):
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if not line.startswith('?'):
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continue
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filename = line[1:].strip()
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filepath = os.path.abspath(os.path.join(svn_repo, filename))
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abs_svn_repo = os.path.abspath(svn_repo)
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# Safety check that the directory we are about to delete is
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# actually within our svn staging dir.
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if not filepath.startswith(abs_svn_repo):
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die("Path to clean (%s) is not in svn staging dir (%s)"
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% (filepath, abs_svn_repo))
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if os.path.isdir(filepath):
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shutil.rmtree(filepath)
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else:
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os.remove(filepath)
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commits = git('rev-list', '--ancestry-path', 'FETCH_HEAD..HEAD').splitlines()
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# Reverse the order so we commit the oldest commit first
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commits.reverse()
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return commits
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def svn_init(svn_root):
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if not os.path.exists(svn_root):
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log('Creating svn staging directory: (%s)' % (svn_root))
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os.makedirs(svn_root)
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svn(svn_root, 'checkout', '--depth=empty',
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'https://llvm.org/svn/llvm-project/', '.')
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log("svn staging area ready in '%s'" % svn_root)
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if not os.path.isdir(svn_root):
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die("Can't initialize svn staging dir (%s)" % svn_root)
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def git_push_one_rev(rev, dry_run, branch, github_ctx, github_token):
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# Check if this a merge commit by counting the number of parent commits.
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# More than 1 parent commmit means this is a merge.
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num_parents = len(git('show', '--no-patch', '--format="%P"', rev).split())
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if num_parents > 1:
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raise Exception("Merge commit detected, cannot push ", rev)
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def fix_eol_style_native(rev, svn_sr_path, files):
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"""Fix line endings before applying patches with Unix endings
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if num_parents != 1:
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raise Exception("Error detecting number of parents for ", rev)
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SVN on Windows will check out files with CRLF for files with the
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svn:eol-style property set to "native". This breaks `git apply`, which
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typically works with Unix-line ending patches. Work around the problem here
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by doing a dos2unix up front for files with svn:eol-style set to "native".
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SVN will not commit a mass line ending re-doing because it detects the line
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ending format for files with this property.
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"""
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# Skip files that don't exist in SVN yet.
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files = [f for f in files if os.path.exists(os.path.join(svn_sr_path, f))]
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# Use ignore_errors because 'svn propget' prints errors if the file doesn't
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# have the named property. There doesn't seem to be a way to suppress that.
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eol_props = svn(svn_sr_path, 'propget', 'svn:eol-style', *files,
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ignore_errors=True)
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crlf_files = []
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if len(files) == 1:
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# No need to split propget output on ' - ' when we have one file.
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if eol_props.strip() in ['native', 'CRLF']:
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crlf_files = files
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else:
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for eol_prop in eol_props.split('\n'):
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# Remove spare CR.
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eol_prop = eol_prop.strip('\r')
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if not eol_prop:
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continue
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prop_parts = eol_prop.rsplit(' - ', 1)
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if len(prop_parts) != 2:
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eprint("unable to parse svn propget line:")
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eprint(eol_prop)
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continue
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(f, eol_style) = prop_parts
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if eol_style == 'native':
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crlf_files.append(f)
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if crlf_files:
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# Reformat all files with native SVN line endings to Unix format. SVN
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# knows files with native line endings are text files. It will commit
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# just the diff, and not a mass line ending change.
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shell(['dos2unix'] + crlf_files, ignore_errors=True, cwd=svn_sr_path)
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if dry_run:
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print("[DryRun] Would push", rev)
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return
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def split_subrepo(f, git_to_svn_mapping):
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# Given a path, splits it into (subproject, rest-of-path). If the path is
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# not in a subproject, returns ('', full-path).
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subproject, remainder = split_first_path_component(f)
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if subproject in git_to_svn_mapping:
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return subproject, remainder
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else:
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return '', f
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def get_all_parent_dirs(name):
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parts = []
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head, tail = os.path.split(name)
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while head:
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parts.append(head)
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head, tail = os.path.split(head)
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return parts
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def svn_push_one_rev(svn_repo, rev, git_to_svn_mapping, dry_run):
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def split_status(x):
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x = x.split('\t')
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return x[1], x[0]
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files_status = [split_status(x) for x in
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git('diff-tree', '--no-commit-id', '--name-status',
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'--no-renames', '-r', rev).split('\n')]
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if not files_status:
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raise RuntimeError('Empty diff for rev %s?' % rev)
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# Split files by subrepo
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subrepo_files = collections.defaultdict(list)
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for f, st in files_status:
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subrepo, remainder = split_subrepo(f, git_to_svn_mapping)
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subrepo_files[subrepo].append((remainder, st))
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status = svn(svn_repo, 'status', '--no-ignore')
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if status:
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die("Can't push git rev %s because status in svn staging dir (%s) is "
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"not empty:\n%s" % (rev, svn_repo, status))
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svn_dirs_to_update = set()
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for sr, files_status in iteritems(subrepo_files):
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svn_sr_path = git_to_svn_mapping[sr]
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for f, _ in files_status:
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svn_dirs_to_update.add(
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os.path.dirname(os.path.join(svn_sr_path, f)))
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# We also need to svn update any parent directories which are not yet
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# present
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parent_dirs = set()
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for dir in svn_dirs_to_update:
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parent_dirs.update(get_all_parent_dirs(dir))
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parent_dirs = set(dir for dir in parent_dirs
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if not os.path.exists(os.path.join(svn_repo, dir)))
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svn_dirs_to_update.update(parent_dirs)
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# Sort by length to ensure that the parent directories are passed to svn
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# before child directories.
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sorted_dirs_to_update = sorted(svn_dirs_to_update, key=len)
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# SVN update only in the affected directories.
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svn(svn_repo, 'update', '--depth=files', *sorted_dirs_to_update)
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for sr, files_status in iteritems(subrepo_files):
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svn_sr_path = os.path.join(svn_repo, git_to_svn_mapping[sr])
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if os.name == 'nt':
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fix_eol_style_native(rev, svn_sr_path,
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[f for f, _ in files_status])
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# We use text=False (and pass '--binary') so that we can get an exact
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# diff that can be passed as-is to 'git apply' without any line ending,
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# encoding, or other mangling.
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diff = git('show', '--binary', rev, '--',
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*(os.path.join(sr, f) for f, _ in files_status),
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strip=False, text=False)
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# git is the only thing that can handle its own patches...
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if sr == '':
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prefix_strip = '-p1'
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else:
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prefix_strip = '-p2'
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try:
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shell(['git', 'apply', prefix_strip, '-'], cwd=svn_sr_path,
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stdin=diff, die_on_failure=False, text=False)
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except RuntimeError as e:
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eprint("Patch doesn't apply: maybe you should try `git pull -r` "
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"first?")
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sys.exit(2)
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# Handle removed files and directories. We need to be careful not to
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# remove directories just because they _look_ empty in the svn tree, as
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# we might be missing sibling directories in the working copy. So, only
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# remove parent directories if they're empty on both the git and svn
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# sides.
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maybe_dirs_to_remove = set()
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for f, st in files_status:
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if st == 'D':
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maybe_dirs_to_remove.update(get_all_parent_dirs(f))
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svn(svn_sr_path, 'remove', f)
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elif not (st == 'A' or st == 'M' or st == 'T'):
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# Add is handled below, and nothing needs to be done for Modify.
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# (FIXME: Type-change between symlink and file might need some
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# special handling, but let's ignore that for now.)
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die("Unexpected git status for %r: %r" % (f, st))
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maybe_dirs_to_remove = sorted(maybe_dirs_to_remove, key=len)
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for f in maybe_dirs_to_remove:
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if(not os.path.exists(os.path.join(svn_sr_path, f)) and
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git('ls-tree', '-d', rev, os.path.join(sr, f)) == ''):
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svn(svn_sr_path, 'remove', f)
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status_lines = svn(svn_repo, 'status', '--no-ignore').split('\n')
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for l in status_lines:
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f = l[1:].strip()
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if l.startswith('?') or l.startswith('I'):
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svn(svn_repo, 'add', '--no-ignore', f)
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# Now we're ready to commit.
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commit_msg = git('show', '--pretty=%B', '--quiet', rev)
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if not dry_run:
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commit_args = ['commit', '-m', commit_msg]
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if '--force-interactive' in svn(svn_repo, 'commit', '--help'):
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commit_args.append('--force-interactive')
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log(svn(svn_repo, *commit_args))
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log('Committed %s to svn.' % rev)
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else:
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log("Would have committed %s to svn, if this weren't a dry run." % rev)
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# Second push to actually push the commit
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git('push', get_push_url(token = github_token), '{}:{}'.format(rev, branch), print_raw_stderr=True)
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def cmd_push(args):
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'''Push changes back to SVN: this is extracted from Justin Lebar's script
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available here: https://github.com/jlebar/llvm-repo-tools/
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Note: a current limitation is that git does not track file rename, so they
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will show up in SVN as delete+add.
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'''
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# Get the git root
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git_root = git('rev-parse', '--show-toplevel')
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if not os.path.isdir(git_root):
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die("Can't find git root dir")
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# Push from the root of the git repo
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os.chdir(git_root)
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# Get the remote URL, and check if it's one of the standalone repos.
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git_remote_url = git('ls-remote', '--get-url', 'origin')
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git_remote_url = git_remote_url.rstrip('.git').rstrip('/')
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git_remote_repo_name = git_remote_url.rsplit('/', 1)[-1]
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split_repo_path = SPLIT_REPO_NAMES.get(git_remote_repo_name)
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if split_repo_path:
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git_to_svn_mapping = {'': split_repo_path}
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else:
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# Default to the monorepo mapping
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git_to_svn_mapping = LLVM_MONOREPO_SVN_MAPPING
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# We need a staging area for SVN, let's hide it in the .git directory.
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dot_git_dir = git('rev-parse', '--git-common-dir')
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# Not all versions of git support --git-common-dir and just print the
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# unknown command back. If this happens, fall back to --git-dir
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if dot_git_dir == '--git-common-dir':
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dot_git_dir = git('rev-parse', '--git-dir')
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svn_root = os.path.join(dot_git_dir, 'llvm-upstream-svn')
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svn_init(svn_root)
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rev_range = args.rev_range
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'''Push changes to git:'''
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dry_run = args.dry_run
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revs = get_revs_to_push(rev_range)
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if not args.force and not revs:
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die('Nothing to push: No revs in range %s.' % rev_range)
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revs = get_revs_to_push(args.branch)
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log('%sPushing %d %s commit%s:\n%s' %
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if not revs:
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die('Nothing to push')
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log('%sPushing %d commit%s:\n%s' %
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('[DryRun] ' if dry_run else '', len(revs),
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'split-repo (%s)' % split_repo_path
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if split_repo_path else 'monorepo',
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's' if len(revs) != 1 else '',
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'\n'.join(' ' + git('show', '--oneline', '--quiet', c)
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for c in revs)))
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@ -477,132 +261,18 @@ def cmd_push(args):
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if not ask_confirm("Are you sure you want to create %d commits?" % len(revs)):
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die("Aborting")
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# FIXME: I'm really trying to avoid prompting twice for the password, the only
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# way I can see to do that is require an authentication token instead of a
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# password, because you can embedded authentication tokens into the URL.
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github_token = getpass.getpass("Auth token for https://github.com':")
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g = github.Github(github_token)
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for r in revs:
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clean_svn(svn_root)
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svn_push_one_rev(svn_root, r, git_to_svn_mapping, dry_run)
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def lookup_llvm_svn_id(git_commit_hash):
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# Use --format=%b to get the raw commit message, without any extra
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# whitespace.
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commit_msg = git('log', '-1', '--format=%b', git_commit_hash,
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ignore_errors=True)
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if len(commit_msg) == 0:
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die("Can't find git commit " + git_commit_hash)
|
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# If a commit has multiple "llvm-svn:" lines (e.g. if the commit is
|
||||
# reverting/quoting a previous commit), choose the last one, which should
|
||||
# be the authoritative one.
|
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svn_match_iter = re.finditer('^llvm-svn: (\d{5,7})$', commit_msg,
|
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re.MULTILINE)
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svn_match = None
|
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for m in svn_match_iter:
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svn_match = m.group(1)
|
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if svn_match:
|
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return int(svn_match)
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die("Can't find svn revision in git commit " + git_commit_hash)
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|
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|
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def cmd_svn_lookup(args):
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'''Find the SVN revision id for a given git commit hash.
|
||||
|
||||
This is identified by 'llvm-svn: NNNNNN' in the git commit message.'''
|
||||
# Get the git root
|
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git_root = git('rev-parse', '--show-toplevel')
|
||||
if not os.path.isdir(git_root):
|
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die("Can't find git root dir")
|
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|
||||
# Run commands from the root
|
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os.chdir(git_root)
|
||||
|
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log('r' + str(lookup_llvm_svn_id(args.git_commit_hash)))
|
||||
|
||||
|
||||
def git_hash_by_svn_rev(svn_rev):
|
||||
'''Find the git hash for a given svn revision.
|
||||
|
||||
This check is paranoid: 'llvm-svn: NNNNNN' could exist on its own line
|
||||
somewhere else in the commit message. Look in the full log message to see
|
||||
if it's actually on the last line.
|
||||
|
||||
Since this check is expensive (we're searching every single commit), limit
|
||||
to the past 10k commits (about 5 months).
|
||||
'''
|
||||
possible_hashes = git(
|
||||
'log', '--format=%H', '--grep', '^llvm-svn: %d$' % svn_rev,
|
||||
'HEAD~10000...HEAD').split('\n')
|
||||
matching_hashes = [h for h in possible_hashes
|
||||
if lookup_llvm_svn_id(h) == svn_rev]
|
||||
if len(matching_hashes) > 1:
|
||||
die("svn revision r%d has ambiguous commits: %s" % (
|
||||
svn_rev, ', '.join(matching_hashes)))
|
||||
elif len(matching_hashes) < 1:
|
||||
die("svn revision r%d matches no commits" % svn_rev)
|
||||
return matching_hashes[0]
|
||||
|
||||
|
||||
def cmd_revert(args):
|
||||
'''Revert a commit by either SVN id (rNNNNNN) or git hash. This also
|
||||
populates the git commit message with both the SVN revision and git hash of
|
||||
the change being reverted.'''
|
||||
|
||||
# Get the git root
|
||||
git_root = git('rev-parse', '--show-toplevel')
|
||||
if not os.path.isdir(git_root):
|
||||
die("Can't find git root dir")
|
||||
|
||||
# Run commands from the root
|
||||
os.chdir(git_root)
|
||||
|
||||
# Check for a client branch first.
|
||||
open_files = git('status', '-uno', '-s', '--porcelain')
|
||||
if len(open_files) > 0:
|
||||
die("Found open files. Please stash and then revert.\n" + open_files)
|
||||
|
||||
# If the revision looks like rNNNNNN (or with a callsign, e.g. rLLDNNNNNN),
|
||||
# use that. Otherwise, look for it in the git commit.
|
||||
svn_match = re.match('^r[A-Z]*(\d{5,7})$', args.revision)
|
||||
if svn_match:
|
||||
# If the revision looks like rNNNNNN, use that as the svn revision, and
|
||||
# grep through git commits to find which one corresponds to that svn
|
||||
# revision.
|
||||
svn_rev = int(svn_match.group(1))
|
||||
git_hash = git_hash_by_svn_rev(svn_rev)
|
||||
else:
|
||||
# Otherwise, this looks like a git hash, so we just need to grab the
|
||||
# svn revision from the end of the commit message. Get the actual git
|
||||
# hash in case the revision is something like "HEAD~1"
|
||||
git_hash = git('rev-parse', '--verify', args.revision + '^{commit}')
|
||||
svn_rev = lookup_llvm_svn_id(git_hash)
|
||||
|
||||
msg = git('log', '-1', '--format=%s', git_hash)
|
||||
|
||||
log_verbose('Ready to revert r%d (%s): "%s"' % (svn_rev, git_hash, msg))
|
||||
|
||||
revert_args = ['revert', '--no-commit', git_hash]
|
||||
# TODO: Running --edit doesn't seem to work, with errors that stdin is not
|
||||
# a tty.
|
||||
commit_args = [
|
||||
'commit', '-m', 'Revert ' + msg,
|
||||
'-m', 'This reverts r%d (git commit %s)' % (svn_rev, git_hash)]
|
||||
if args.dry_run:
|
||||
log("Would have run the following commands, if this weren't a"
|
||||
"dry run:\n"
|
||||
'1) git %s\n2) git %s' % (
|
||||
' '.join(quote(arg) for arg in revert_args),
|
||||
' '.join(quote(arg) for arg in commit_args)))
|
||||
return
|
||||
|
||||
git(*revert_args)
|
||||
commit_log = git(*commit_args)
|
||||
|
||||
log('Created revert of r%d: %s' % (svn_rev, commit_log))
|
||||
log("Run 'git llvm push -n' to inspect your changes and "
|
||||
"run 'git llvm push' when ready")
|
||||
git_push_one_rev(r, dry_run, args.branch, g, github_token)
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
if not program_exists('svn'):
|
||||
die('error: git-llvm needs svn command, but svn is not installed.')
|
||||
if not program_exists('git'):
|
||||
die('error: git-llvm needs git command, but git is not installed.')
|
||||
|
||||
argv = sys.argv[1:]
|
||||
p = argparse.ArgumentParser(
|
||||
@ -634,40 +304,14 @@ if __name__ == '__main__':
|
||||
action='store_true',
|
||||
help='Do not ask for confirmation when pushing multiple commits.')
|
||||
parser_push.add_argument(
|
||||
'rev_range',
|
||||
metavar='GIT_REVS',
|
||||
'branch',
|
||||
metavar='GIT_BRANCH',
|
||||
type=str,
|
||||
nargs='?',
|
||||
help="revs to push (default: everything not in the branch's "
|
||||
'upstream, or not in origin/master if the branch lacks '
|
||||
'an explicit upstream)')
|
||||
help="branch to push (default: everything not in the branch's "
|
||||
'upstream)')
|
||||
parser_push.set_defaults(func=cmd_push)
|
||||
|
||||
parser_revert = subcommands.add_parser(
|
||||
'revert', description=cmd_revert.__doc__,
|
||||
help='Revert a commit locally.')
|
||||
parser_revert.add_argument(
|
||||
'revision',
|
||||
help='Revision to revert. Can either be an SVN revision number '
|
||||
"(rNNNNNN) or a git commit hash (anything that doesn't look "
|
||||
'like an SVN revision number).')
|
||||
parser_revert.add_argument(
|
||||
'-n',
|
||||
'--dry-run',
|
||||
dest='dry_run',
|
||||
action='store_true',
|
||||
help='Do everything other than perform a revert. Prints the git '
|
||||
'revert command it would have run.')
|
||||
parser_revert.set_defaults(func=cmd_revert)
|
||||
|
||||
parser_svn_lookup = subcommands.add_parser(
|
||||
'svn-lookup', description=cmd_svn_lookup.__doc__,
|
||||
help='Find the llvm-svn revision for a given commit.')
|
||||
parser_svn_lookup.add_argument(
|
||||
'git_commit_hash',
|
||||
help='git_commit_hash for which we will look up the svn revision id.')
|
||||
parser_svn_lookup.set_defaults(func=cmd_svn_lookup)
|
||||
|
||||
args = p.parse_args(argv)
|
||||
VERBOSE = args.verbose
|
||||
QUIET = args.quiet
|
||||
|
||||
Loading…
Reference in New Issue
Block a user