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#!/usr/bin/env python
# Copyright (c) 2012 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Does one of the following depending on the --mode argument:
check verify all the inputs exist, touches the file specified with
--result and exits.
hashtable puts a manifest file and hard links each of the inputs into the
output directory.
remap stores all the inputs files in a directory without running the
executable.
run recreates a tree with all the inputs files and run the executable
in it.
See more information at
http://dev.chromium.org/developers/testing/isolated-testing
"""
import hashlib
import json
import logging
import optparse
import os
import re
import shutil
import subprocess
import sys
import tempfile
import time
import tree_creator
# Needs to be coherent with the file's docstring above.
VALID_MODES = ('check', 'hashtable', 'remap', 'run')
def touch(filename):
"""Implements the equivalent of the 'touch' command."""
if not os.path.exists(filename):
open(filename, 'a').close()
os.utime(filename, None)
def rmtree(root):
"""Wrapper around shutil.rmtree() to retry automatically on Windows."""
if sys.platform == 'win32':
for i in range(3):
try:
shutil.rmtree(root)
break
except WindowsError: # pylint: disable=E0602
delay = (i+1)*2
print >> sys.stderr, (
'The test has subprocess outliving it. Sleep %d seconds.' % delay)
time.sleep(delay)
else:
shutil.rmtree(root)
def relpath(path, root):
"""os.path.relpath() that keeps trailing slash."""
out = os.path.relpath(path, root)
if path.endswith('/'):
out += '/'
return out
def separate_inputs_command(args, root):
"""Strips off the command line from the inputs.
gyp provides input paths relative to cwd. Convert them to be relative to root.
"""
cmd = []
if '--' in args:
i = args.index('--')
cmd = args[i+1:]
args = args[:i]
cwd = os.getcwd()
return [relpath(os.path.join(cwd, arg), root) for arg in args], cmd
def isolate(outdir, resultfile, indir, infiles, mode, read_only, cmd):
"""Main function to isolate a target with its dependencies.
It's behavior depends on |mode|.
"""
if mode == 'run':
return run(outdir, resultfile, indir, infiles, read_only, cmd)
if mode == 'hashtable':
return hashtable(outdir, resultfile, indir, infiles)
assert mode in ('check', 'remap'), mode
if mode == 'remap':
if not outdir:
outdir = tempfile.mkdtemp(prefix='isolate')
tree_creator.recreate_tree(
outdir, indir, infiles, tree_creator.HARDLINK)
if read_only:
tree_creator.make_writable(outdir, True)
if resultfile:
# Signal the build tool that the test succeeded.
with open(resultfile, 'wb') as f:
for infile in infiles:
f.write(infile.encode('utf-8'))
f.write('\n')
def run(outdir, resultfile, indir, infiles, read_only, cmd):
"""Implements the 'run' mode."""
if not cmd:
print >> sys.stderr, 'Using first input %s as executable' % infiles[0]
cmd = [infiles[0]]
outdir = None
try:
outdir = tempfile.mkdtemp(prefix='isolate')
tree_creator.recreate_tree(
outdir, indir, infiles, tree_creator.HARDLINK)
if read_only:
tree_creator.make_writable(outdir, True)
# TODO(maruel): Remove me. Layering violation. Used by
# base/base_paths_linux.cc
env = os.environ.copy()
env['CR_SOURCE_ROOT'] = outdir.encode()
# Rebase the command to the right path.
cmd[0] = os.path.join(outdir, cmd[0])
logging.info('Running %s' % cmd)
result = subprocess.call(cmd, cwd=outdir, env=env)
if not result and resultfile:
# Signal the build tool that the test succeeded.
touch(resultfile)
return result
finally:
if read_only:
tree_creator.make_writable(outdir, False)
rmtree(outdir)
def hashtable(outdir, resultfile, indir, infiles):
"""Implements the 'hashtable' mode."""
results = {}
for relfile in infiles:
infile = os.path.join(indir, relfile)
h = hashlib.sha1()
with open(infile, 'rb') as f:
h.update(f.read())
digest = h.hexdigest()
outfile = os.path.join(outdir, digest)
tree_creator.process_file(outfile, infile, tree_creator.HARDLINK)
results[relfile] = {'sha1': digest}
json.dump(
{
'files': results,
},
open(resultfile, 'wb'))
def main():
parser = optparse.OptionParser(
usage='%prog [options] [inputs] -- [command line]',
description=sys.modules[__name__].__doc__)
parser.allow_interspersed_args = False
parser.format_description = lambda *_: parser.description
parser.add_option(
'-v', '--verbose', action='count', default=0, help='Use multiple times')
parser.add_option(
'--mode', choices=VALID_MODES,
help='Determines the action to be taken: %s' % ', '.join(VALID_MODES))
parser.add_option(
'--result', metavar='FILE',
help='File to be touched when the command succeeds')
parser.add_option(
'--root', metavar='DIR', help='Base directory to fetch files, required')
parser.add_option(
'--outdir', metavar='DIR',
help='Directory used to recreate the tree or store the hash table. '
'Defaults to a /tmp subdirectory for modes run and remap.')
parser.add_option(
'--read-only', action='store_true',
help='Make the temporary tree read-only')
options, args = parser.parse_args()
level = [logging.ERROR, logging.INFO, logging.DEBUG][min(2, options.verbose)]
logging.basicConfig(
level=level,
format='%(levelname)5s %(module)15s(%(lineno)3d): %(message)s')
if not options.root:
parser.error('--root is required.')
infiles, cmd = separate_inputs_command(args, options.root)
if not infiles:
parser.error('Need at least one input file to map')
# Preprocess the input files.
try:
infiles, root = tree_creator.preprocess_inputs(
options.root, infiles, lambda x: re.match(r'.*\.(svn|pyc)$', x))
return isolate(
options.outdir,
options.result,
root,
infiles,
options.mode,
options.read_only,
cmd)
except tree_creator.MappingError, e:
print >> sys.stderr, str(e)
return 1
if __name__ == '__main__':
sys.exit(main())
|
