gecko-dev/testing/mozbase/generate_diff.py

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Python
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#!/usr/bin/env python
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
"""
Given a list of packages and the versions to mirror,
generate a diff appropriate for mirroring
https://github.com/mozilla/mozbase
to http://hg.mozilla.org/mozilla-central/file/tip/testing/mozbase
If a package version is not given, the latest version will be used.
Note that this shells out to `cp` for simplicity, so you should run this
somewhere that has the `cp` command available.
Your mozilla-central repository must have no outstanding changes before this
script is run. The repository must also have no untracked
files that show up in `hg st`.
See: https://bugzilla.mozilla.org/show_bug.cgi?id=702832
"""
import imp
import optparse
import os
import re
import shutil
import subprocess
import sys
import tempfile
from pkg_resources import parse_version
from subprocess import check_call as call
# globals
here = os.path.dirname(os.path.abspath(__file__))
MOZBASE = 'git://github.com/mozilla/mozbase.git'
version_regex = r"""PACKAGE_VERSION *= *['"]([0-9.]+)["'].*"""
setup_development = imp.load_source('setup_development',
os.path.join(here, 'setup_development.py'))
current_package = None
current_package_info = {}
def error(msg):
"""err out with a message"""
print >> sys.stdout, msg
sys.exit(1)
def remove(path):
"""remove a file or directory"""
if os.path.isdir(path):
shutil.rmtree(path)
else:
os.remove(path)
### git functions
def latest_commit(git_dir):
"""returns last commit hash from a git repository directory"""
command = ['git', 'log', '--pretty=format:%H', 'HEAD^..HEAD']
process = subprocess.Popen(command,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
cwd=git_dir)
stdout, stderr = process.communicate()
return stdout.strip()
def tags(git_dir):
"""return all tags in a git repository"""
command = ['git', 'tag']
process = subprocess.Popen(command,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
cwd=git_dir)
stdout, stderr = process.communicate()
return [line.strip() for line in stdout.strip().splitlines()]
def checkout(git_dir, tag):
"""checkout a tagged version of a git repository"""
command = ['git', 'checkout', tag]
process = subprocess.Popen(command,
cwd=git_dir)
process.communicate()
### hg functions
def untracked_files(hg_dir):
"""untracked files in an hg repository"""
process = subprocess.Popen(['hg', 'st'],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
cwd=hg_dir)
stdout, stderr = process.communicate()
lines = [line.strip() for line in stdout.strip().splitlines()]
status = [line.split(None, 1) for line in lines]
return [j for i, j in status if i == '?']
def revert(hg_dir, excludes=()):
"""revert a hg repository directory"""
call(['hg', 'revert', '--no-backup', '--all'], cwd=hg_dir)
newfiles = untracked_files(hg_dir)
for f in newfiles:
path = os.path.join(hg_dir, f)
if path not in excludes:
os.remove(path)
###
def generate_packages_txt():
"""
generate a packages.txt file appropriate for
http://mxr.mozilla.org/mozilla-central/source/build/virtualenv/populate_virtualenv.py
See also:
http://mxr.mozilla.org/mozilla-central/source/build/virtualenv/packages.txt
"""
prefix = 'testing/mozbase/' # relative path from topsrcdir
# gather the packages
packages = setup_development.mozbase_packages
# write them in the appropriate format
path = os.path.join(here, 'packages.txt')
with file(path, 'w') as f:
for package in sorted(packages):
f.write("%s.pth:%s%s\n" % (package, prefix, package))
### version-related functions
def parse_versions(*args):
"""return a list of 2-tuples of (directory, version)"""
retval = []
for arg in args:
if '=' in arg:
directory, version = arg.split('=', 1)
else:
directory = arg
version = None
retval.append((directory, version))
return retval
def version_tag(directory, version):
return '%s-%s' % (directory, version)
def setup(**kwargs):
"""monkey-patch function for setuptools.setup"""
assert current_package
current_package_info[current_package] = kwargs
def check_consistency(*package_info):
"""checks consistency between a set of packages"""
# set versions and dependencies per package
versions = {}
dependencies = {}
for package in package_info:
name = package['name']
versions[name] = package['version']
for dep in package.get('install_requires', []):
dependencies.setdefault(name, []).append(dep)
func_map = {'==': tuple.__eq__,
'<=': tuple.__le__,
'>=': tuple.__ge__}
# check dependencies
errors = []
for package, deps in dependencies.items():
for dep in deps:
parsed = setup_development.dependency_info(dep)
if parsed['Name'] not in versions:
# external dependency
continue
if parsed.get('Version') is None:
# no version specified for dependency
continue
# check versions
func = func_map[parsed['Type']]
comparison = func(parse_version(versions[parsed['Name']]),
parse_version(parsed['Version']))
if not comparison:
# an error
errors.append("Dependency for package '%s' failed: %s-%s not %s %s" % (package, parsed['Name'], versions[parsed['Name']], parsed['Type'], parsed['Version']))
# raise an Exception if errors exist
if errors:
raise Exception('\n'.join(errors))
###
def main(args=sys.argv[1:]):
"""command line entry point"""
# parse command line options
usage = '%prog [options] package1[=version1] <package2=version2> <...>'
class PlainDescriptionFormatter(optparse.IndentedHelpFormatter):
"""description formatter for console script entry point"""
def format_description(self, description):
if description:
return description.strip() + '\n'
else:
return ''
parser = optparse.OptionParser(usage=usage,
description=__doc__,
formatter=PlainDescriptionFormatter())
parser.add_option('-o', '--output', dest='output',
help="specify the output file; otherwise will be in the current directory with a name based on the hash")
parser.add_option('--packages', dest='output_packages',
default=False, action='store_true',
help="generate packages.txt and exit")
options, args = parser.parse_args(args)
if options.output_packages:
generate_packages_txt()
parser.exit()
if args:
versions = parse_versions(*args)
else:
parser.print_help()
parser.exit()
output = options.output
# gather info from current mozbase packages
global current_package
setuptools = sys.modules.get('setuptools')
sys.modules['setuptools'] = sys.modules[__name__]
try:
for package in setup_development.mozbase_packages:
current_package = package
imp.load_source('setup', os.path.join(here, package, 'setup.py'))
finally:
current_package = None
sys.modules.pop('setuptools')
if setuptools:
sys.modules['setuptools'] = setuptools
assert set(current_package_info.keys()) == set(setup_development.mozbase_packages)
# check consistency of current set of packages
check_consistency(*current_package_info.values())
# calculate hg root
hg_root = os.path.dirname(os.path.dirname(here)) # testing/mozbase
hg_dir = os.path.join(hg_root, '.hg')
assert os.path.exists(hg_dir) and os.path.isdir(hg_dir)
# ensure there are no outstanding changes to m-c
process = subprocess.Popen(['hg', 'diff'], cwd=here, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
stdout, stderr = process.communicate()
if stdout.strip():
error("Outstanding changes in %s; aborting" % hg_root)
# ensure that there are no untracked files in testing/mozbase
untracked = untracked_files(hg_root)
if untracked:
error("Untracked files in %s:\n %s\naborting" % (hg_root, '\n'.join([' %s' % i for i in untracked])))
tempdir = tempfile.mkdtemp()
try:
# download mozbase
call(['git', 'clone', MOZBASE], cwd=tempdir)
src = os.path.join(tempdir, 'mozbase')
assert os.path.isdir(src)
if output is None:
commit_hash = latest_commit(src)
output = os.path.join(os.getcwd(), '%s.diff' % commit_hash)
# get the tags
_tags = tags(src)
# ensure all directories and tags are available
for index, (directory, version) in enumerate(versions):
if not version:
# choose maximum version from setup.py
setup_py = os.path.join(src, directory, 'setup.py')
assert os.path.exists(setup_py), "'%s' not found" % setup_py
with file(setup_py) as f:
for line in f.readlines():
line = line.strip()
match = re.match(version_regex, line)
if match:
version = match.groups()[0]
versions[index] = (directory, version)
print "Using %s=%s" % (directory, version)
break
else:
error("Cannot find PACKAGE_VERSION in %s" % setup_py)
tag = version_tag(directory, version)
if tag not in _tags:
error("Tag for '%s' -- %s -- not in tags")
# ensure that the versions to mirror are compatible with what is in m-c
old_package_info = current_package_info.copy()
setuptools = sys.modules.get('setuptools')
sys.modules['setuptools'] = sys.modules[__name__]
try:
for directory, version in versions:
# checkout appropriate revision of mozbase
tag = version_tag(directory, version)
checkout(src, tag)
# update the package information
setup_py = os.path.join(src, directory, 'setup.py')
current_package = directory
imp.load_source('setup', setup_py)
finally:
current_package = None
sys.modules.pop('setuptools')
if setuptools:
sys.modules['setuptools'] = setuptools
checkout(src, 'HEAD')
check_consistency(*current_package_info.values())
# copy mozbase directories to m-c
for directory, version in versions:
# checkout appropriate revision of mozbase
tag = version_tag(directory, version)
checkout(src, tag)
# replace the directory
remove(os.path.join(here, directory))
call(['cp', '-r', directory, here], cwd=src)
# regenerate mozbase's packages.txt
generate_packages_txt()
# generate the diff and write to output file
call(['hg', 'addremove'], cwd=hg_root)
process = subprocess.Popen(['hg', 'diff'],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
cwd=hg_root)
stdout, stderr = process.communicate()
with file(output, 'w') as f:
f.write(stdout)
f.close()
# ensure that the diff you just wrote isn't deleted
untracked.append(os.path.abspath(output))
finally:
# cleanup
revert(hg_root, untracked)
shutil.rmtree(tempdir)
print "Diff at %s" % output
if __name__ == '__main__':
main()