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#!/usr/bin/python2.4
# Copyright 2008, Google Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""SCons tool for 7zip."""
import os
import shutil
import subprocess
import tempfile
import SCons.Script
def SevenZipGetFiles(env, source):
"""SCons emitter for 7zip extract.
Examines the source 7z archive to determine the list of files which will be
created by extract/unzip operation.
Args:
env: The SCons environment to get the 7zip command line from.
source: The 7zip archive to examine.
Returns:
The list of filenames in the archive.
"""
# Expand the command to list archive contents.
cmd = env.subst('$SEVEN_ZIP l "%s"' % source)
# Run it and capture output.
output = subprocess.Popen(cmd, stdout=subprocess.PIPE).communicate()[0]
# Strip off 7-line header and 3-line trailer from 7zip output.
lines = output.split('\r\n')[7:-3]
# Trim out just the files and their names.
files = [i[53:] for i in lines if i[20] != 'D']
return files
def SevenZipEmitter(target, source, env):
"""An emitter that decides what nodes are vented from a 7zip archive.
Args:
target: The target directory node.
source: The source archive node.
env: The environment in which the emit takes place.
Returns:
The pair (target, source) which lists the emitted targets and sources.
"""
# Remember out dir for later.
env['SEVEN_ZIP_OUT_DIR'] = target[0].dir
# Get out contents
files = SevenZipGetFiles(env, env.subst('$SOURCE', source=source))
# Extract a layer deeper if there is only one, and it extension is 7z.
if env.get('SEVEN_ZIP_PEEL_LAYERS', False):
assert len(files) == 1 and os.path.splitext(files[0])[1] == '.7z'
# Create a temporary directory.
tmp_dir = tempfile.mkdtemp()
# Expand the command to extract the archive to a temporary location.
cmd = env.subst('$SEVEN_ZIP x $SOURCE -o"%s"' % tmp_dir, source=source[0])
# Run it and swallow output.
subprocess.Popen(cmd, stdout=subprocess.PIPE).communicate()
# Get contents.
inner_files = SevenZipGetFiles(env, os.path.join(tmp_dir, files[0]))
# Make into file nodes.
inner_files = [target[0].dir.File(i) for i in inner_files]
# Delete temp_dir.
shutil.rmtree(tmp_dir)
# Decide where to extra working file to.
working_file = env.Dir(target[0].dir.abspath +
'.7zip_extract').File(files[0])
# Combine everything.
files = [working_file] + inner_files
else:
# Make into file nodes.
files = [target[0].dir.File(i) for i in files]
# Return files as actual target.
return (files, source)
def SevenZipGenerator(source, target, env, for_signature):
"""The generator function which decides how to extract a file."""
# Silence lint.
source = source
target = target
for_signature = for_signature
if env.get('SEVEN_ZIP_PEEL_LAYERS', False):
return [SCons.Script.Delete('$SEVEN_ZIP_OUT_DIR'),
'$SEVEN_ZIP x $SOURCE -o"${TARGET.dir}"',
'$SEVEN_ZIP x $TARGET -o"$SEVEN_ZIP_OUT_DIR"']
else:
return [SCons.Script.Delete('$SEVEN_ZIP_OUT_DIR'),
'$SEVEN_ZIP x $SOURCE -o"$SEVEN_ZIP_OUT_DIR"']
def generate(env):
# NOTE: SCons requires the use of this name, which fails gpylint.
"""SCons entry point for this tool."""
env.Replace(
SEVEN_ZIP='$SEVEN_ZIP_DIR/7za.exe',
SEVEN_ZIP_ARCHIVE_OPTIONS = ['-t7z', '-mx0'],
SEVEN_ZIP_COMPRESS_OPTIONS = ['-t7z', '-mx9'],
)
b = SCons.Script.Builder(generator=SevenZipGenerator,
emitter=SevenZipEmitter)
env['BUILDERS']['Extract7zip'] = b
b = SCons.Script.Builder(
action=('cd $SOURCE && '
'$SEVEN_ZIP a $SEVEN_ZIP_ARCHIVE_OPTIONS ${TARGET.abspath} ./'))
env['BUILDERS']['Archive7zip'] = b
b = SCons.Script.Builder(
action=('cd ${SOURCE.dir} && '
'$SEVEN_ZIP a $SEVEN_ZIP_COMPRESS_OPTIONS '
'${TARGET.abspath} ${SOURCE.file}'))
env['BUILDERS']['Compress7zip'] = b
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