git.py

   1 # Copyright (c) 2005 Fredrik Kuivinen <freku045@student.liu.se>
   2 #
   3 # This program is free software; you can redistribute it and/or modify
   4 # it under the terms of the GNU General Public License version 2 as
   5 # published by the Free Software Foundation.
   6 #
   7 # This program is distributed in the hope that it will be useful,
   8 # but WITHOUT ANY WARRANTY; without even the implied warranty of
   9 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10 # GNU General Public License for more details.
  11 #
  12 # You should have received a copy of the GNU General Public License
  13 # along with this program; if not, write to the Free Software
  14 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  15
  16 import sys, os, re
  17
  18 from ctcore import *
  19
  20 def repoValid():
  21     if not os.environ.has_key('GIT_DIR'):
  22         os.environ['GIT_DIR'] = '.git'
  23
  24     if not os.environ.has_key('GIT_OBJECT_DIRECTORY'):
  25         os.environ['GIT_OBJECT_DIRECTORY'] = os.environ['GIT_DIR'] + '/objects'
  26
  27     if not (os.path.exists(os.environ['GIT_DIR']) and
  28             os.path.exists(os.environ['GIT_DIR'] + '/refs') and
  29             os.path.exists(os.environ['GIT_OBJECT_DIRECTORY']) and
  30             os.path.exists(os.environ['GIT_OBJECT_DIRECTORY'] + '/00')):
  31         print "Git archive not found."
  32         print "Make sure that the current working directory contains a '.git' directory, or\nthat GIT_DIR is set appropriately."
  33         sys.exit(1)
  34
  35 parseDiffRE = re.compile(':([0-9]+) ([0-9]+) ([0-9a-f]{40}) ([0-9a-f]{40}) ([MCRNADUT])([0-9]*)')
  36 def parseDiff(prog):
  37     inp = runProgram(prog)
  38     ret = []
  39     try:
  40         recs = inp.split("\0")
  41         recs.pop() # remove last entry (which is '')
  42         it = recs.__iter__()
  43         while True:
  44             rec = it.next()
  45             m = parseDiffRE.match(rec)
  46
  47             if not m:
  48                 print "Unknown output from " + str(prog) + "!: " + rec + "\n"
  49                 continue
  50
  51             f = File()
  52             f.srcMode = m.group(1)
  53             f.dstMode = m.group(2)
  54             f.srcSHA = m.group(3)
  55             f.dstSHA = m.group(4)
  56             if m.group(5) == 'N':
  57                 f.change = 'A'
  58             else:
  59                 f.change = m.group(5)
  60             f.score = m.group(6)
  61             f.srcName = f.dstName = it.next()
  62
  63             if f.change == 'C' or f.change == 'R':
  64                 f.dstName = it.next()
  65                 f.patch = getPatch(f.srcName, f.dstName)
  66             else:
  67                 f.patch = getPatch(f.srcName)
  68
  69             ret.append(f)
  70     except StopIteration:
  71         pass
  72     return ret
  73
  74 def runXargsStyle(origProg, args):
  75     steps = range(10, len(args), 10)
  76     prog = origProg[:]
  77     prev = 0
  78     for i in steps:
  79         prog.extend(args[prev:i])
  80         runProgram(prog)
  81         prog = origProg[:]
  82         prev = i
  83
  84     prog.extend(args[prev:])
  85     runProgram(prog)
  86
  87 def getUnknownFiles():
  88      args = []
  89
  90      if settings().gitExcludeFile():
  91          if os.path.exists(settings().gitExcludeFile()):
  92              args.append('--exclude-from=' + settings().gitExcludeFile())
  93      if settings().gitExcludeDir():
  94          args.append('--exclude-per-directory=' + settings().gitExcludeDir())
  95
  96      inp = runProgram(['git-ls-files', '-z', '--others'] + args)
  97      files = inp.split("\0")
  98      files.pop() # remove last entry (which is '')
  99
 100      fileObjects = []
 101
 102      runXargsStyle(['git-update-index', '--add', '--'], files)
 103      for fileName in files:
 104          f = File()
 105          f.srcName = f.dstName = fileName
 106          f.change = '?'
 107          f.patch = runProgram(['git-diff-cache', '-p', '--cached', 'HEAD', '--', fileName])
 108          fileObjects.append(f)
 109          f.text = 'New file: ' + fileName
 110
 111      runXargsStyle(['git-update-index', '--force-remove', '--'], files)
 112      return fileObjects
 113
 114 # HEAD is src in the returned File objects. That is, srcName is the
 115 # name in HEAD and dstName is the name in the cache.
 116 def getFiles():
 117     files = parseDiff('git-diff-files -z')
 118     for f in files:
 119         doUpdateCache(f.srcName)
 120
 121     files = parseDiff('git-diff-cache -z -M --cached HEAD')
 122     for f in files:
 123         c = f.change
 124         if   c == 'C':
 125             f.text = 'Copy from ' + f.srcName + ' to ' + f.dstName
 126         elif c == 'R':
 127             f.text = 'Rename from ' + f.srcName + ' to ' + f.dstName
 128         elif c == 'A':
 129             f.text = 'New file: ' + f.srcName
 130         elif c == 'D':
 131             f.text = 'Deleted file: ' + f.srcName
 132         elif c == 'T':
 133             f.text = 'Type change: ' + f.srcName
 134         else:
 135             f.text = f.srcName
 136
 137     if settings().gitShowUnknown:
 138         files.extend(getUnknownFiles())
 139
 140     return files
 141
 142 def getPatch(file, otherFile = None):
 143     if otherFile:
 144         f = [file, otherFile]
 145     else:
 146         f = [file]
 147     return runProgram(['git-diff-cache', '-p', '-M', '--cached', 'HEAD'] + f)
 148
 149 def doUpdateCache(filename):
 150     runProgram(['git-update-index', '--remove', '--add', '--replace', '--', filename])
 151
 152 def doCommit(filesToKeep, filesToCommit, msg):
 153     for file in filesToKeep:
 154         # If we have a new file in the cache which we do not want to
 155         # commit we have to remove it from the cache. We will add this
 156         # cache entry back in to the cache at the end of this
 157         # function.
 158         if file.change == 'A':
 159             runProgram(['git-update-index', '--force-remove',
 160                         '--', file.srcName])
 161         elif file.change == 'R':
 162             runProgram(['git-update-index', '--force-remove',
 163                         '--', file.dstName])
 164             runProgram(['git-update-index', '--add', '--replace',
 165                         '--cacheinfo', file.srcMode, file.srcSHA, file.srcName])
 166         elif file.change == '?':
 167             pass
 168         else:
 169             runProgram(['git-update-index', '--add', '--replace',
 170                         '--cacheinfo', file.srcMode, file.srcSHA, file.srcName])
 171
 172     for file in filesToCommit:
 173         if file.change == '?':
 174             runProgram(['git-update-index', '--add', '--', file.dstName])
 175
 176     tree = runProgram(['git-write-tree'])
 177     tree = tree.rstrip()
 178
 179     if commitIsMerge():
 180         merge = ['-p', 'MERGE_HEAD']
 181     else:
 182         merge = []
 183     commit = runProgram(['git-commit-tree', tree, '-p', 'HEAD'] + merge, msg)
 184
 185     try:
 186         f = open(os.environ['GIT_DIR'] + '/HEAD', 'w+')
 187         f.write(commit)
 188         f.close()
 189     except OSError, e:
 190         raise CommitError('write to ' + os.environ['GIT_DIR'] + '/HEAD', e.strerror)
 191
 192     try:
 193         os.unlink(os.environ['GIT_DIR'] + '/MERGE_HEAD')
 194     except OSError:
 195         pass
 196
 197     for file in filesToKeep:
 198         # Don't add files that are going to be deleted back to the cache
 199         if file.change != 'D' and file.change != '?':
 200             runProgram(['git-update-index', '--add', '--replace', '--cacheinfo',
 201                         file.dstMode, file.dstSHA, file.dstName])
 202
 203         if file.change == 'R':
 204             runProgram(['git-update-index', '--remove', '--', file.srcName])
 205
 206 def discardFile(file):
 207     runProgram(['git-read-tree', 'HEAD'])
 208     c = file.change
 209     if c == 'M' or c == 'T':
 210         runProgram(['git-checkout-cache', '-f', '-q', '--', file.dstName])
 211     elif c == 'A' or c == 'C':
 212         # The file won't be tracked by git now. We could unlink it
 213         # from the working directory, but that seems a little bit
 214         # too dangerous.
 215         pass
 216     elif c == 'D':
 217         runProgram(['git-checkout-cache', '-f', '-q', '--', file.dstName])
 218     elif c == 'R':
 219         # Same comment applies here as to the 'A' or 'C' case.
 220         runProgram(['git-checkout-cache', '-f', '-q', '--', file.srcName])
 221
 222 def ignoreFile(file):
 223     ignoreExpr = re.sub(r'([][*?!\\])', r'\\\1', file.dstName)
 224
 225     excludefile = settings().gitExcludeFile()
 226     excludefiledir = os.path.dirname(excludefile)
 227     if not os.path.exists(excludefiledir):
 228         os.mkdir(excludefiledir)
 229     if not os.path.isdir(excludefiledir):
 230         return
 231     exclude = open(excludefile, 'a')
 232     print >> exclude, ignoreExpr
 233     exclude.close()
 234
 235     pass
 236
 237 def commitIsMerge():
 238     try:
 239         os.stat(os.environ['GIT_DIR'] + '/MERGE_HEAD')
 240         return True
 241     except OSError:
 242         return False
 243
 244 def mergeMessage():
 245     return '''This is a merge commit if you do not want to commit a ''' + \
 246            '''merge remove the file $GIT_DIR/MERGE_HEAD.'''