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c5c9ea0b9b
A number of places refer to these paths and that number is going to grow. Since the standard pattern is to use environment variables for commonly used paths it is time to add ones for these: REPO_CACHE_DIR REPO_MANIFESTS_DIR
341 lines
11 KiB
Python
Executable File
341 lines
11 KiB
Python
Executable File
#!/usr/bin/python
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# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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"""
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Script to generate a zip file of delta-generator and its dependencies.
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"""
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import logging.handlers
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import optparse
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import os
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import re
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import shutil
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import subprocess
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import sys
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import tempfile
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REPO_MANIFESTS_DIR = os.environ['REPO_MANIFESTS_DIR']
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SCRIPTS_DIR = os.environ['SCRIPTS_DIR']
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# GLOBALS
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STATIC_FILES = ['/usr/bin/old_bins/cgpt',
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'/usr/bin/cros_generate_update_payload',
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'%s/version.txt' % REPO_MANIFESTS_DIR,
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'%s/chromeos-common.sh' % SCRIPTS_DIR,
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'%s/common.sh' % SCRIPTS_DIR,
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'%s/core_upload_update' % SCRIPTS_DIR,
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]
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DYNAMIC_EXECUTABLES = ['/usr/bin/delta_generator',
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'/usr/bin/core-admin',
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'/usr/bin/bsdiff',
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'/usr/bin/bspatch']
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# These files will be ignored when present in the dependancy list.
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BLACK_LIST = [
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# This library does not exist on disk, but is inserted into the
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# executable's memory space when the executable is loaded by the kernel.
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'linux-vdso.so',
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]
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# These files MUST be present in the dependancy list.
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WHITE_LIST = [
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# Update WrapExecutableFiles if this file changes names
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'ld-linux-x86-64.so.2',
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]
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LIB_DIR = 'lib.so'
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# We need directories to be copied recursively to a dest within tempdir
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RECURSE_DIRS = {'~/trunk/src/scripts/lib/shflags': 'lib/shflags'}
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logging_format = '%(asctime)s - %(filename)s - %(levelname)-8s: %(message)s'
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date_format = '%Y/%m/%d %H:%M:%S'
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logging.basicConfig(level=logging.INFO, format=logging_format,
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datefmt=date_format)
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def CreateTempDir():
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"""Creates a tempdir and returns the name of the tempdir."""
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temp_dir = tempfile.mkdtemp(suffix='au', prefix='tmp')
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logging.debug('Using tempdir = %s', temp_dir)
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return temp_dir
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def _SplitAndStrip(data):
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"""Prunes the ldd output, and return a list of needed library names
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Example of data:
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linux-vdso.so.1 => (0x00007ffffc96a000)
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libbz2.so.1 => /lib/libbz2.so.1 (0x00007f3ff8782000)
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libc.so.6 => /lib/libc.so.6 (0x00007f3ff83ff000)
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/lib64/ld-linux-x86-64.so.2 (0x00007f3ff89b3000)
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Args:
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data: list of libraries from ldd output
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Returns:
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list of libararies that we should copy
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"""
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return_list = []
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for line in data.split('\n'):
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line = re.sub('.*not a dynamic executable.*', '', line)
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line = re.sub('.* =>\s+', '', line)
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line = re.sub('\(0x.*\)\s?', '', line)
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line = line.strip()
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if not len(line):
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continue
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logging.debug('MATCHED line = %s', line)
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return_list.append(line)
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return return_list
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def DepsToCopy(ldd_files):
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"""Returns a list of deps for a given dynamic executables list.
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Args:
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ldd_files: List of dynamic files that needs to have the deps evaluated
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black_list: List of files that we should ignore
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Returns:
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List of files that are dependencies
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"""
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libs = set()
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for file_name in ldd_files:
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logging.debug('Running ldd on %s', file_name)
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cmd = ['/usr/bin/ldd', file_name]
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stdout_data = ''
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stderr_data = ''
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try:
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proc = subprocess.Popen(cmd, stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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(stdout_data, stderr_data) = proc.communicate(input=None)
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except subprocess.CalledProcessError, e:
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logging.error('Command %s failed', cmd)
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logging.error('error code %s', e.returncode)
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logging.error('ouput %s', e.output)
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raise
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if not stdout_data: continue
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logging.debug('ldd for %s = stdout = %s stderr =%s', file_name,
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stdout_data, stderr_data)
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libs |= set(_SplitAndStrip(stdout_data))
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result = _ExcludeBlacklist(list(libs), BLACK_LIST)
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_EnforceWhiteList(list(libs), WHITE_LIST)
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return result
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def CopyRequiredFiles(dest_files_root):
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"""Generates a list of files that are required for au-generator zip file
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Args:
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dest_files_root: location of the directory where we should copy the files
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"""
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if not dest_files_root:
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logging.error('Invalid option passed for dest_files_root')
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sys.exit(1)
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all_files = DYNAMIC_EXECUTABLES + STATIC_FILES
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all_files = map(os.path.expanduser, all_files)
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for file_name in all_files:
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if not os.path.isfile(file_name):
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logging.error('file = %s does not exist', file_name)
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sys.exit(1)
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logging.debug('Given files that need to be copied = %s' % '' .join(all_files))
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all_files
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for file_name in all_files:
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logging.debug('Copying file %s to %s', file_name, dest_files_root)
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shutil.copy2(file_name, dest_files_root)
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libraries = DepsToCopy(ldd_files=DYNAMIC_EXECUTABLES)
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lib_dir = os.path.join(dest_files_root, LIB_DIR)
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os.mkdir(lib_dir)
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for file_name in libraries:
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logging.debug('Copying file %s to %s', file_name, lib_dir)
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shutil.copy2(file_name, lib_dir)
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for source_dir, target_dir in RECURSE_DIRS.iteritems():
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logging.debug('Processing directory %s', source_dir)
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full_path = os.path.expanduser(source_dir)
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if not os.path.isdir(full_path):
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logging.error("Directory given for %s expanded to %s doens't exist.",
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source_dir, full_path)
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sys.exit(1)
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dest = os.path.join(dest_files_root, target_dir)
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logging.debug('Copying directory %s to %s.', full_path, target_dir)
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shutil.copytree(full_path, dest)
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def WrapExecutableFiles(dest_files_root):
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"""Our dynamically linked executalbes have to be invoked use the library
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versions they were linked with inside the chroot (from libc on), as well
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as the dynamic linker they were built with inside the chroot.
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So, this code moves the execs to backup names, and then creates a shell
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script wrapper which invokes them in the proper way.
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"""
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for src_exec in DYNAMIC_EXECUTABLES:
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base_exec = os.path.basename(src_exec)
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local_exec = os.path.join(dest_files_root, base_exec)
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local_exec_wrapped = local_exec + ".bin"
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shutil.move(local_exec, local_exec_wrapped)
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fd = os.open(local_exec, os.O_WRONLY | os.O_CREAT, 0733)
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with os.fdopen(fd, 'w') as script:
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script.write('#!/bin/sh\n')
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script.write('# Auto-generated wrapper script\n')
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script.write('thisdir="$(dirname "$0")"\n')
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script.write('LD_LIBRARY_PATH=\n')
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script.write('exec "$thisdir/%s/ld-linux-x86-64.so.2"'
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' --library-path "$thisdir/%s"'
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' "$thisdir/%s.bin" "$@"\n' %
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(LIB_DIR, LIB_DIR, base_exec))
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def CleanUp(temp_dir):
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"""Cleans up the tempdir
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Args:
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temp_dir = name of the directory to cleanup
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"""
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if os.path.exists(temp_dir):
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shutil.rmtree(temp_dir, ignore_errors=True)
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logging.debug('Removed tempdir = %s', temp_dir)
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def GenerateZipFile(base_name, root_dir):
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"""Returns true if able to generate zip file
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Args:
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base_name: name of the zip file
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root_dir: location of the directory that we should zip
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Returns:
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True if successfully generates the zip file otherwise False
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"""
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logging.debug('Generating zip file %s with contents from %s', base_name,
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root_dir)
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current_dir = os.getcwd()
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os.chdir(root_dir)
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try:
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subprocess.Popen(['zip', '-r', '-9', base_name, '.'],
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stdout=subprocess.PIPE).communicate()[0]
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except OSError, e:
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logging.error('Execution failed:%s', e.strerror)
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return False
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finally:
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os.chdir(current_dir)
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return True
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def _ExcludeBlacklist(library_list, black_list=[]):
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"""Deletes the set of files from black_list from the library_list
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Args:
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library_list: List of the library names to filter through black_list
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black_list: List of the black listed names to filter
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Returns:
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Filtered library_list
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"""
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if not black_list:
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return library_list
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return_list = []
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pattern = re.compile(r'|'.join(black_list))
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logging.debug('PATTERN: %s=', pattern)
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for library in library_list:
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if pattern.search(library):
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logging.debug('BLACK-LISTED = %s=', library)
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continue
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return_list.append(library)
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logging.debug('Returning return_list=%s=', return_list)
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return return_list
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def _EnforceWhiteList(library_list, white_list=[]):
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"""Deletes the set of files from black_list from the library_list
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Args:
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library_list: List of the library names to filter through black_list
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black_list: List of the black listed names to filter
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Returns:
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Filtered library_list
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"""
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for white_item in white_list:
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pattern = re.compile(white_item)
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logging.debug('PATTERN: %s=', pattern)
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found = False
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for library in library_list:
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if pattern.search(library):
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found = True
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break
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if not found:
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logging.error('Required WHITE_LIST items %s not found!!!' % white_item)
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exit(1)
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def CopyZipToFinalDestination(output_dir, zip_file_name):
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"""Copies the generated zip file to a final destination
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Args:
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output_dir: Directory where the file should be copied to
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zip_file_name: name of the zip file that should be copied
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Returns:
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True on Success False on Failure
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"""
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if not os.path.isfile(zip_file_name):
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logging.error("Zip file %s doesn't exist. Returning False", zip_file_name)
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return False
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if not os.path.isdir(output_dir):
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logging.debug('Creating %s', output_dir)
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os.makedirs(output_dir)
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logging.debug('Copying %s to %s', zip_file_name, output_dir)
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shutil.copy2(zip_file_name, output_dir)
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return True
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def main():
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"""Main function to start the script"""
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parser = optparse.OptionParser()
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parser.add_option( '-d', '--debug', dest='debug', action='store_true',
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default=False, help='Verbose Default: False',)
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parser.add_option('-o', '--output-dir', dest='output_dir',
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default='/tmp/au-generator',
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help='Specify the output location for copying the zipfile')
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parser.add_option('-z', '--zip-name', dest='zip_name',
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default='au-generator.zip', help='Name of the zip file')
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parser.add_option('-k', '--keep-temp', dest='keep_temp', default=False,
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action='store_true', help='Keep the temp files...',)
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(options, args) = parser.parse_args()
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if options.debug:
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logging.getLogger().setLevel(logging.DEBUG)
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logging.debug('Options are %s ', options)
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temp_dir = CreateTempDir()
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dest_files_root = os.path.join(temp_dir, 'au-generator')
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os.makedirs(dest_files_root)
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CopyRequiredFiles(dest_files_root=dest_files_root)
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WrapExecutableFiles(dest_files_root=dest_files_root)
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zip_file_name = os.path.join(temp_dir, options.zip_name)
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GenerateZipFile(zip_file_name, dest_files_root)
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CopyZipToFinalDestination(options.output_dir, zip_file_name)
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logging.info('Generated %s/%s' % (options.output_dir, options.zip_name))
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if not options.keep_temp:
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CleanUp(temp_dir)
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if __name__ == '__main__':
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main()
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