gecko/tools/update-packaging/make_incremental_updates.py

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import os
import shutil
import sha
import sha
from os.path import join, getsize
from stat import *
import re
import sys
import getopt
import time
import datetime
import bz2
import string
import tempfile
class PatchInfo:
""" Represents the meta-data associated with a patch
work_dir = working dir where files are stored for this patch
archive_files = list of files to include in this patch
manifest = set of patch instructions
file_exclusion_list =
files to exclude from this patch. names without slashes will be
excluded anywhere in the directory hiearchy. names with slashes
will only be excluded at that exact path
"""
def __init__(self, work_dir, file_exclusion_list, path_exclusion_list):
self.work_dir=work_dir
self.archive_files=[]
self.manifest=[]
self.file_exclusion_list=file_exclusion_list
self.path_exclusion_list=path_exclusion_list
def append_add_instruction(self, filename):
""" Appends an add instruction for this patch.
if the filename starts with extensions/ adds an add-if instruction
to test the existence of the subdirectory. This was ported from
mozilla/tools/update-packaging/common.sh/make_add_instruction
"""
if filename.startswith("extensions/"):
testdir = "extensions/"+filename.split("/")[1] # Dir immediately following extensions is used for the test
self.manifest.append('add-if "'+testdir+'" "'+filename+'"')
else:
self.manifest.append('add "'+filename+'"')
def append_patch_instruction(self, filename, patchname):
""" Appends an patch instruction for this patch.
filename = file to patch
patchname = patchfile to apply to file
if the filename starts with extensions/ adds a patch-if instruction
to test the existence of the subdirectory.
if the filename starts with searchplugins/ add a add-if instruction for the filename
This was ported from
mozilla/tools/update-packaging/common.sh/make_patch_instruction
"""
if filename.startswith("extensions/"):
testdir = "extensions/"+filename.split("/")[1]
self.manifest.append('patch-if "'+testdir+'" "'+patchname+'" "'+filename+'"')
elif filename.startswith("searchplugins/"):
self.manifest.append('patch-if "'+filename+'" "'+patchname+'" "'+filename+'"')
else:
self.manifest.append('patch "'+patchname+'" "'+filename+'"')
def append_remove_instruction(self, filename):
""" Appends an remove instruction for this patch.
This was ported from
mozilla/tools/update-packaging/common.sh/make_remove_instruction
"""
self.manifest.append('remove "'+filename+'"')
def create_manifest_file(self):
""" Createst the manifest file into to the root of the work_dir """
manifest_file_path = os.path.join(self.work_dir,"update.manifest")
manifest_file = open(manifest_file_path, "w")
manifest_file.writelines(string.join(self.manifest, '\n'))
manifest_file.writelines("\n")
manifest_file.close()
bzip_file(manifest_file_path)
self.archive_files.append('"update.manifest"')
def build_marfile_entry_hash(self, root_path):
""" Iterates through the root_path, creating a MarFileEntry for each file
in that path. Excluseds any filenames in the file_exclusion_list
"""
mar_entry_hash = {}
filename_set = set()
for root, dirs, files in os.walk(root_path):
for name in files:
# filename is relative path from root directory
partial_path = root[len(root_path)+1:]
if name not in self.file_exclusion_list:
filename = os.path.join(partial_path, name)
if "/"+filename not in self.path_exclusion_list:
mar_entry_hash[filename]=MarFileEntry(root_path, filename)
filename_set.add(filename)
return mar_entry_hash, filename_set
class MarFileEntry:
"""Represents a file inside a Mozilla Archive Format (MAR)
abs_path = abspath to the the file
name = relative path within the mar. e.g.
foo.mar/dir/bar.txt extracted into /tmp/foo:
abs_path=/tmp/foo/dir/bar.txt
name = dir/bar.txt
"""
def __init__(self, root, name):
"""root = path the the top of the mar
name = relative path within the mar"""
self.name=name
self.abs_path=os.path.join(root,name)
self.sha_cache=None
def __str__(self):
return 'Name: %s FullPath: %s' %(self.name,self.abs_path)
def calc_file_sha_digest(self, filename):
""" Returns sha digest of given filename"""
file_content = open(filename, 'r').read()
return sha.new(file_content).digest()
def sha(self):
""" Returns sha digest of file repreesnted by this _marfile_entry"""
if not self.sha_cache:
self.sha_cache=self.calc_file_sha_digest(self.abs_path)
return self.sha_cache
def exec_shell_cmd(cmd):
"""Execs shell cmd and raises an exception if the cmd fails"""
if (os.system(cmd)):
raise Exception, "cmd failed "+cmd
def copy_file(src_file_abs_path, dst_file_abs_path):
""" Copies src to dst creating any parent dirs required in dst first """
dst_file_dir=os.path.dirname(dst_file_abs_path)
if not os.path.exists(dst_file_dir):
os.makedirs(dst_file_dir)
# Copy the file over
shutil.copy2(src_file_abs_path, dst_file_abs_path)
def bzip_file(filename):
""" Bzip's the file in place. The original file is replaced with a bzip'd version of itself
assumes the path is absolute"""
exec_shell_cmd('bzip2 -z9 "' + filename+'"')
os.rename(filename+".bz2",filename)
def bunzip_file(filename):
""" Bzip's the file in palce. The original file is replaced with a bunzip'd version of itself.
doesn't matter if the filename ends in .bz2 or not"""
if not filename.endswith(".bz2"):
os.rename(filename, filename+".bz2")
filename=filename+".bz2"
exec_shell_cmd('bzip2 -d "' + filename+'"')
def extract_mar(filename, work_dir):
""" Extracts the marfile intot he work_dir
assumes work_dir already exists otherwise will throw osError"""
print "Extracting "+filename+" to "+work_dir
saved_path = os.getcwd()
try:
os.chdir(work_dir)
exec_shell_cmd("mar -x "+filename)
finally:
os.chdir(saved_path)
def create_partial_patch_for_file(from_marfile_entry, to_marfile_entry, shas, patch_info):
""" Creates the partial patch file and manifest entry for the pair of files passed in
"""
if not (from_marfile_entry.sha(),to_marfile_entry.sha()) in shas:
print "diffing: " + from_marfile_entry.name
#bunzip to/from
bunzip_file(from_marfile_entry.abs_path)
bunzip_file(to_marfile_entry.abs_path)
# The patch file will be created in the working directory with the
# name of the file in the mar + .patch
patch_file_abs_path = os.path.join(patch_info.work_dir,from_marfile_entry.name+".patch")
patch_file_dir=os.path.dirname(patch_file_abs_path)
if not os.path.exists(patch_file_dir):
os.makedirs(patch_file_dir)
# Create bzip'd patch file
exec_shell_cmd("mbsdiff "+from_marfile_entry.abs_path+" "+to_marfile_entry.abs_path+" "+patch_file_abs_path)
bzip_file(patch_file_abs_path)
# Create bzip's full file
full_file_abs_path = os.path.join(patch_info.work_dir, to_marfile_entry.name)
shutil.copy2(to_marfile_entry.abs_path, full_file_abs_path)
bzip_file(full_file_abs_path)
## TOODO NEED TO ADD HANDLING FOR FORCED UPDATES
if os.path.getsize(patch_file_abs_path) < os.path.getsize(full_file_abs_path):
# Patch is smaller than file. Remove the file and add patch to manifest
os.remove(full_file_abs_path)
file_in_manifest_name = from_marfile_entry.name+".patch"
file_in_manifest_abspath = patch_file_abs_path
patch_info.append_patch_instruction(to_marfile_entry.name, file_in_manifest_name)
else:
# File is smaller than patch. Remove the patch and add file to manifest
os.remove(patch_file_abs_path)
file_in_manifest_name = from_marfile_entry.name
file_in_manifest_abspath = full_file_abs_path
patch_info.append_add_instruction(file_in_manifest_name)
shas[from_marfile_entry.sha(),to_marfile_entry.sha()] = (file_in_manifest_name,file_in_manifest_abspath)
patch_info.archive_files.append('"'+file_in_manifest_name+'"')
else:
print "skipping diff: " + from_marfile_entry.name
filename, src_file_abs_path = shas[from_marfile_entry.sha(),to_marfile_entry.sha()]
# We've already calculated the patch for this pair of files.
if (filename.endswith(".patch")):
# Patch was smaller than file - add patch instruction to manifest
file_in_manifest_name = to_marfile_entry.name+'.patch';
patch_info.append_patch_instruction(to_marfile_entry.name, file_in_manifest_name)
else:
# File was smaller than file - add file to manifest
file_in_manifest_name = to_marfile_entry.name
patch_info.append_add_instruction(file_in_manifest_name)
# Copy the pre-calculated file into our new patch work aread
copy_file(src_file_abs_path, os.path.join(patch_info.work_dir, file_in_manifest_name))
patch_info.archive_files.append('"'+file_in_manifest_name+'"')
def create_add_patch_for_file(to_marfile_entry, patch_info):
""" Copy the file to the working dir, add the add instruction, and add it to the list of archive files """
print "Adding New File " + to_marfile_entry.name
copy_file(to_marfile_entry.abs_path, os.path.join(patch_info.work_dir, to_marfile_entry.name))
patch_info.append_add_instruction(to_marfile_entry.name)
patch_info.archive_files.append('"'+to_marfile_entry.name+'"')
def process_explicit_remove_files(dir_path, patch_info):
""" Looks for a 'removed-files' file in the dir_path. If the removed-files does not exist
this will throw. If found adds the removed-files
found in that file to the patch_info"""
# Windows and linux have this file at the root of the dir
list_file_path = os.path.join(dir_path, "removed-files")
prefix=""
if not os.path.exists(list_file_path):
# Mac has is in Contents/MacOS/
prefix= "Contents/MacOS"
list_file_path = os.path.join(dir_path, prefix+"/removed-files")
if (os.path.exists(list_file_path)):
list_file = bz2.BZ2File(list_file_path,"r") # throws if doesn't exist
for line in list_file:
line = line.strip()
# Exclude any blank lines or any lines ending with a slash, which indicate
# directories. The updater doesn't know how to remove entire directories.
if line and not line.endswith("/"):
patch_info.append_remove_instruction(os.path.join(prefix,line))
def create_partial_patch(from_dir_path, to_dir_path, patch_filename, shas, patch_info):
""" Builds a partial patch by comparing the files in from_dir_path to thoes of to_dir_path"""
# Cannocolize the paths for safey
from_dir_path = os.path.abspath(from_dir_path)
to_dir_path = os.path.abspath(to_dir_path)
# First create a hashtable of the from and to directories
from_dir_hash,from_dir_set = patch_info.build_marfile_entry_hash(from_dir_path)
to_dir_hash,to_dir_set = patch_info.build_marfile_entry_hash(to_dir_path)
# Files which exist in both sets need to be patched
patch_filenames = list(from_dir_set.intersection(to_dir_set))
patch_filenames.sort()
for filename in patch_filenames:
from_marfile_entry = from_dir_hash[filename]
to_marfile_entry = to_dir_hash[filename]
if from_marfile_entry.sha() != to_marfile_entry.sha():
# Not the same - calculate a patch
create_partial_patch_for_file(from_marfile_entry, to_marfile_entry, shas, patch_info)
# files in from_dir not in to_dir need to be removed
remove_filenames = list(from_dir_set - to_dir_set)
remove_filenames.sort()
for filename in remove_filenames:
patch_info.append_remove_instruction(from_dir_hash[filename].name)
# files in to_dir not in from_dir need to added
add_filenames = list(to_dir_set - from_dir_set)
add_filenames.sort()
for filename in add_filenames:
create_add_patch_for_file(to_dir_hash[filename], patch_info)
process_explicit_remove_files(to_dir_path, patch_info)
# Construct Manifest file
patch_info.create_manifest_file()
# And construct the mar
mar_cmd = 'mar -C '+patch_info.work_dir+' -c output.mar '+string.join(patch_info.archive_files, ' ')
exec_shell_cmd(mar_cmd)
# Copy mar to final destination
patch_file_dir = os.path.split(patch_filename)[0]
if not os.path.exists(patch_file_dir):
os.makedirs(patch_file_dir)
shutil.copy2(os.path.join(patch_info.work_dir,"output.mar"), patch_filename)
return patch_filename
def usage():
print "-h for help"
print "-f for patchlist_file"
def get_buildid(work_dir, platform):
""" extracts buildid from MAR
TODO: this should handle 1.8 branch too
"""
if platform == 'mac':
ini = '%s/Contents/MacOS/application.ini' % work_dir
else:
ini = '%s/application.ini' % work_dir
if not os.path.exists(ini):
print 'WARNING: application.ini not found, cannot find build ID'
return ''
file = bz2.BZ2File(ini)
for line in file:
if line.find('BuildID') == 0:
return line.strip().split('=')[1]
print 'WARNING: cannot find build ID in application.ini'
return ''
def decode_filename(filename):
""" Breaks filename into component parts based on regex
for example: firefox-3.0b3pre.en-US.linux-i686.complete.mar
Returns dict with keys product, version, locale, platform, type
"""
try:
m = re.search(
'(?P<product>\w+)(-)(?P<version>\w+\.\w+)(\.)(?P<locale>.+?)(\.)(?P<platform>.+?)(\.)(?P<type>\w+)(.mar)',
filename)
return m.groupdict()
except Exception, exc:
raise Exception("could not parse filename %s: %s" % (filename, exc))
def create_partial_patches(patches):
""" Given the patches generates a set of partial patches"""
shas = {}
work_dir_root = None
metadata = []
try:
work_dir_root = tempfile.mkdtemp('-fastmode', 'tmp', os.getcwd())
print "Building patches using work dir: %s" % (work_dir_root)
# Iterate through every patch set in the patch file
patch_num = 1
for patch in patches:
startTime = time.time()
from_filename,to_filename,patch_filename,forced_updates = patch.split(",")
from_filename,to_filename,patch_filename = os.path.abspath(from_filename),os.path.abspath(to_filename),os.path.abspath(patch_filename)
# Each patch iteration uses its own work dir
work_dir = os.path.join(work_dir_root,str(patch_num))
os.mkdir(work_dir)
# Extract from mar into from dir
work_dir_from = os.path.join(work_dir,"from");
os.mkdir(work_dir_from)
extract_mar(from_filename,work_dir_from)
from_decoded = decode_filename(os.path.basename(from_filename))
from_buildid = get_buildid(work_dir_from, from_decoded['platform'])
from_shasum = sha.sha(open(from_filename).read()).hexdigest()
from_size = str(os.path.getsize(to_filename))
# Extract to mar into to dir
work_dir_to = os.path.join(work_dir,"to")
os.mkdir(work_dir_to)
extract_mar(to_filename, work_dir_to)
to_decoded = decode_filename(os.path.basename(from_filename))
to_buildid = get_buildid(work_dir_to, to_decoded['platform'])
to_shasum = sha.sha(open(to_filename).read()).hexdigest()
to_size = str(os.path.getsize(to_filename))
mar_extract_time = time.time()
partial_filename = create_partial_patch(work_dir_from, work_dir_to, patch_filename, shas, PatchInfo(work_dir, ['channel-prefs.js','update.manifest','removed-files'],['/readme.txt']))
partial_decoded = decode_filename(os.path.basename(partial_filename))
partial_buildid = to_buildid
partial_shasum = sha.sha(open(partial_filename).read()).hexdigest()
partial_size = str(os.path.getsize(partial_filename))
metadata.append({
'to_filename': os.path.basename(to_filename),
'from_filename': os.path.basename(from_filename),
'partial_filename': os.path.basename(partial_filename),
'to_buildid':to_buildid,
'from_buildid':from_buildid,
'to_sha1sum':to_shasum,
'from_sha1sum':from_shasum,
'partial_sha1sum':partial_shasum,
'to_size':to_size,
'from_size':from_size,
'partial_size':partial_size,
'to_version':to_decoded['version'],
'from_version':from_decoded['version'],
'locale':partial_decoded['locale'],
'platform':partial_decoded['platform'],
})
print "done with patch %s/%s time (%.2fs/%.2fs/%.2fs) (mar/patch/total)" % (str(patch_num),str(len(patches)),mar_extract_time-startTime,time.time()-mar_extract_time,time.time()-startTime)
patch_num += 1
return metadata
finally:
# If we fail or get a ctrl-c during run be sure to clean up temp dir
if (work_dir_root and os.path.exists(work_dir_root)):
shutil.rmtree(work_dir_root)
def main(argv):
patchlist_file = None
try:
opts, args = getopt.getopt(argv, "hf:", ["help", "patchlist_file="])
for opt, arg in opts:
if opt in ("-h", "--help"):
usage()
sys.exit()
elif opt in ("-f", "--patchlist_file"):
patchlist_file = arg
except getopt.GetoptError:
usage()
sys.exit(2)
if not patchlist_file:
usage()
sys.exit(2)
patches = []
f = open(patchlist_file, 'r')
for line in f.readlines():
patches.append(line)
f.close()
create_partial_patches(patches)
if __name__ == "__main__":
main(sys.argv[1:])