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#!/usr/bin/python
#
# find a linux kernel commit message (including its associated diff)
# given a search text provided by the user
#
# Copyright (C) 2009 Michael S Gilbert
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import os
import re
import sys
import urllib
import tempfile
if ( len( sys.argv ) < 2 ):
sys.stderr.write( 'usage: %s <search text> {only-rc|oldest-version=2.6.#}\n' % sys.argv[0] )
sys.exit( 1 )
if ( len( sys.argv ) > 2 ):
onlyrc = sys.argv[2] == 'only-rc'
if sys.argv[2].startswith( 'oldest-version=' ):
oldest_version = int( sys.argv[2].split( '=' )[1].split( '.' )[2] )
else:
oldest_version = 12
else:
onlyrc = False
oldest_version = 12
if not os.path.exists( '/usr/bin/git' ):
sys.stderr.write( 'error: this script uses git; please install the package\n' )
sys.exit( 1 )
# if not already downloadeded, clone stable kernel.org git repo
giturl = 'git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-2.6-stable.git/'
gitdir = './linux-2.6-stable'
if not os.path.exists( os.path.join( gitdir , '.git/HEAD' ) ):
sys.stdout.write( 'Existing git repository not found; will now clone from kernel.org.\n\n' )
sys.stdout.write( 'This may take a while, so if you already have a working stable repository,\n' )
sys.stdout.write( 'please copy it to the current directory with the name \'%s\'.\n' % gitdir.lstrip( './' ) )
sys.stdout.write( 'Note that this *is not* Linus Torvald\'s repository, it is the stable repo:\n' )
sys.stdout.write( '%s\n\n' % giturl)
if ( os.system( 'git clone %s %s' % ( giturl , gitdir ) ) != 0 ):
sys.exit( 1 )
# if kernel.org repository has updates, pull them
os.chdir( gitdir )
fread = open( './.git/refs/heads/master' , 'r' )
local_hash = fread.readline().strip( '\n' )
fread.close()
fread = urllib.urlopen( 'http://ftp%s/packed-refs' % giturl[9::] , 'r' )
split = [ '' , '' ]
while ( split[1] != 'refs/heads/master' ):
split = fread.readline().strip( ' \n' ).split()
if len( split ) < 2:
split = [ '' , '' ]
remote_hash = split[0]
fread.close()
if ( local_hash != remote_hash ):
if ( os.system( 'git pull' ) != 0 ):
sys.exit( 1 )
# retrieve set of release tags
pipe = os.popen( 'git tag -l' )
tags = pipe.readlines()
tags.reverse()
pipe.close()
# generate changelog+diff files
lastversion = ''
ismainline = True
rootname = 'changelog+diff'
for tag in tags:
version = tag.strip( '\n' )
isnotrc = tag.find( '-rc' ) < 0
if isnotrc:
ismainline = False
if isnotrc or ismainline:
if ( lastversion != '' ):
fname = '%s-%s' % ( rootname , lastversion.lstrip( 'v' ) )
if onlyrc and ( lastversion.find( '-rc' ) < 0 ):
break
elif ( int( version.split( '.' )[2].split( '-' )[0] ) >= oldest_version ):
if not os.path.exists( fname ):
tmpname = tempfile.mkstemp()[1]
sys.stdout.write( 'generating: %s\n' % fname )
if ( os.system( 'git log -p %s..%s > %s' % ( version , lastversion , tmpname ) ) != 0 ):
os.system( 'rm %s' % tmpname )
sys.exit( 1 )
if ( os.system( 'cp %s %s' % ( tmpname , fname ) ) != 0 ):
os.system( 'rm %s' % tmpname )
sys.exit( 1 )
os.system( 'rm %s' % tmpname )
lastversion = version
# search thru the generated files for text of interest
lastfname = ''
foundtext = False
pipe = os.popen( 'grep \'%s\' $(ls -r %s*)' % ( sys.argv[1] , rootname ) )
pline = pipe.readline()
while pline:
fname = pline.split( ':' )[0]
if fname != lastfname:
fread = open( fname , 'r' )
line = fread.readline()
while line:
if line.startswith( 'commit' ):
if foundtext:
sys.stdout.write( 'found search text \'%s\' in release %s:\n' % ( sys.argv[1] , fname[len( rootname )+1::] ) )
sys.stdout.write( commit )
foundtext = False
commit = '| %s' % line
else:
commit += '| %s' % line
if re.search( sys.argv[1] , line ):
foundtext = True
line = fread.readline()
fread.close()
lastfname = fname
pline = pipe.readline()
pipe.close()
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