#!/usr/bin/python
+#
+# Copyright (C) 2005 Fredrik Kuivinen
+#
-import sys, math, random, os, re, signal, tempfile, stat, errno, traceback
+import sys
+sys.path.append('''@@GIT_PYTHON_PATH@@''')
+
+import math, random, os, re, signal, tempfile, stat, errno, traceback
from heapq import heappush, heappop
from sets import Set
-sys.path.append('@@GIT_PYTHON_PATH@@')
from gitMergeCommon import *
-# The actual merge code
-# ---------------------
+outputIndent = 0
+def output(*args):
+ sys.stdout.write(' '*outputIndent)
+ printList(args)
+
+originalIndexFile = os.environ.get('GIT_INDEX_FILE',
+ os.environ.get('GIT_DIR', '.git') + '/index')
+temporaryIndexFile = os.environ.get('GIT_DIR', '.git') + \
+ '/merge-recursive-tmp-index'
+def setupIndex(temporary):
+ try:
+ os.unlink(temporaryIndexFile)
+ except OSError:
+ pass
+ if temporary:
+ newIndex = temporaryIndexFile
+ else:
+ newIndex = originalIndexFile
+ os.environ['GIT_INDEX_FILE'] = newIndex
+
+# This is a global variable which is used in a number of places but
+# only written to in the 'merge' function.
+
+# cacheOnly == True => Don't leave any non-stage 0 entries in the cache and
+# don't update the working directory.
+# False => Leave unmerged entries in the cache and update
+# the working directory.
+
+cacheOnly = False
+
+# The entry point to the merge code
+# ---------------------------------
-def merge(h1, h2, branch1Name, branch2Name, graph, callDepth=0):
+def merge(h1, h2, branch1Name, branch2Name, graph, callDepth=0, ancestor=None):
'''Merge the commits h1 and h2, return the resulting virtual
commit object and a flag indicating the cleaness of the merge.'''
assert(isinstance(h1, Commit) and isinstance(h2, Commit))
- assert(isinstance(graph, Graph))
-
- def infoMsg(*args):
- sys.stdout.write(' '*callDepth)
- printList(args)
- infoMsg('Merging:')
- infoMsg(h1)
- infoMsg(h2)
+
+ global outputIndent
+
+ output('Merging:')
+ output(h1)
+ output(h2)
sys.stdout.flush()
- ca = getCommonAncestors(graph, h1, h2)
- infoMsg('found', len(ca), 'common ancestor(s):')
+ if ancestor:
+ ca = [ancestor]
+ else:
+ assert(isinstance(graph, Graph))
+ ca = getCommonAncestors(graph, h1, h2)
+ output('found', len(ca), 'common ancestor(s):')
for x in ca:
- infoMsg(x)
+ output(x)
sys.stdout.flush()
- Ms = ca[0]
+ mergedCA = ca[0]
for h in ca[1:]:
- [Ms, ignore] = merge(Ms, h,
- 'Temporary shared merge branch 1',
- 'Temporary shared merge branch 2',
- graph, callDepth+1)
- assert(isinstance(Ms, Commit))
-
+ outputIndent = callDepth+1
+ [mergedCA, dummy] = merge(mergedCA, h,
+ 'Temporary merge branch 1',
+ 'Temporary merge branch 2',
+ graph, callDepth+1)
+ outputIndent = callDepth
+ assert(isinstance(mergedCA, Commit))
+
+ global cacheOnly
if callDepth == 0:
- if len(ca) > 1:
- runProgram(['git-read-tree', h1.tree()])
- runProgram(['git-update-cache', '-q', '--refresh'])
- # Use the original index if we only have one common ancestor
-
- cleanCache = False
+ setupIndex(False)
+ cacheOnly = False
else:
+ setupIndex(True)
runProgram(['git-read-tree', h1.tree()])
- cleanCache = True
+ cacheOnly = True
- [shaRes, clean] = mergeTrees(h1.tree(), h2.tree(), Ms.tree(),
- branch1Name, branch2Name,
- cleanCache)
+ [shaRes, clean] = mergeTrees(h1.tree(), h2.tree(), mergedCA.tree(),
+ branch1Name, branch2Name)
- if clean or cleanCache:
+ if graph and (clean or cacheOnly):
res = Commit(None, [h1, h2], tree=shaRes)
graph.addNode(res)
else:
return [res, clean]
-getFilesRE = re.compile('([0-9]+) ([a-z0-9]+) ([0-9a-f]{40})\t(.*)')
+getFilesRE = re.compile(r'^([0-7]+) (\S+) ([0-9a-f]{40})\t(.*)$', re.S)
def getFilesAndDirs(tree):
files = Set()
dirs = Set()
- out = runProgram(['git-ls-tree', '-r', '-z', tree])
+ out = runProgram(['git-ls-tree', '-r', '-z', '-t', tree])
for l in out.split('\0'):
m = getFilesRE.match(l)
if m:
return [files, dirs]
+# Those two global variables are used in a number of places but only
+# written to in 'mergeTrees' and 'uniquePath'. They keep track of
+# every file and directory in the two branches that are about to be
+# merged.
+currentFileSet = None
+currentDirectorySet = None
+
+def mergeTrees(head, merge, common, branch1Name, branch2Name):
+ '''Merge the trees 'head' and 'merge' with the common ancestor
+ 'common'. The name of the head branch is 'branch1Name' and the name of
+ the merge branch is 'branch2Name'. Return a tuple (tree, cleanMerge)
+ where tree is the resulting tree and cleanMerge is True iff the
+ merge was clean.'''
+
+ assert(isSha(head) and isSha(merge) and isSha(common))
+
+ if common == merge:
+ output('Already uptodate!')
+ return [head, True]
+
+ if cacheOnly:
+ updateArg = '-i'
+ else:
+ updateArg = '-u'
+
+ [out, code] = runProgram(['git-read-tree', updateArg, '-m',
+ common, head, merge], returnCode = True)
+ if code != 0:
+ die('git-read-tree:', out)
+
+ [tree, code] = runProgram('git-write-tree', returnCode=True)
+ tree = tree.rstrip()
+ if code != 0:
+ global currentFileSet, currentDirectorySet
+ [currentFileSet, currentDirectorySet] = getFilesAndDirs(head)
+ [filesM, dirsM] = getFilesAndDirs(merge)
+ currentFileSet.union_update(filesM)
+ currentDirectorySet.union_update(dirsM)
+
+ entries = unmergedCacheEntries()
+ renamesHead = getRenames(head, common, head, merge, entries)
+ renamesMerge = getRenames(merge, common, head, merge, entries)
+
+ cleanMerge = processRenames(renamesHead, renamesMerge,
+ branch1Name, branch2Name)
+ for entry in entries:
+ if entry.processed:
+ continue
+ if not processEntry(entry, branch1Name, branch2Name):
+ cleanMerge = False
+
+ if cleanMerge or cacheOnly:
+ tree = runProgram('git-write-tree').rstrip()
+ else:
+ tree = None
+ else:
+ cleanMerge = True
+
+ return [tree, cleanMerge]
+
+# Low level file merging, update and removal
+# ------------------------------------------
+
+def mergeFile(oPath, oSha, oMode, aPath, aSha, aMode, bPath, bSha, bMode,
+ branch1Name, branch2Name):
+
+ merge = False
+ clean = True
+
+ if stat.S_IFMT(aMode) != stat.S_IFMT(bMode):
+ clean = False
+ if stat.S_ISREG(aMode):
+ mode = aMode
+ sha = aSha
+ else:
+ mode = bMode
+ sha = bSha
+ else:
+ if aSha != oSha and bSha != oSha:
+ merge = True
+
+ if aMode == oMode:
+ mode = bMode
+ else:
+ mode = aMode
+
+ if aSha == oSha:
+ sha = bSha
+ elif bSha == oSha:
+ sha = aSha
+ elif stat.S_ISREG(aMode):
+ assert(stat.S_ISREG(bMode))
+
+ orig = runProgram(['git-unpack-file', oSha]).rstrip()
+ src1 = runProgram(['git-unpack-file', aSha]).rstrip()
+ src2 = runProgram(['git-unpack-file', bSha]).rstrip()
+ try:
+ [out, code] = runProgram(['merge',
+ '-L', branch1Name + '/' + aPath,
+ '-L', 'orig/' + oPath,
+ '-L', branch2Name + '/' + bPath,
+ src1, orig, src2], returnCode=True)
+ except ProgramError, e:
+ print >>sys.stderr, e
+ die("Failed to execute 'merge'. merge(1) is used as the "
+ "file-level merge tool. Is 'merge' in your path?")
+
+ sha = runProgram(['git-hash-object', '-t', 'blob', '-w',
+ src1]).rstrip()
+
+ os.unlink(orig)
+ os.unlink(src1)
+ os.unlink(src2)
+
+ clean = (code == 0)
+ else:
+ assert(stat.S_ISLNK(aMode) and stat.S_ISLNK(bMode))
+ sha = aSha
+
+ if aSha != bSha:
+ clean = False
+
+ return [sha, mode, clean, merge]
+
+def updateFile(clean, sha, mode, path):
+ updateCache = cacheOnly or clean
+ updateWd = not cacheOnly
+
+ return updateFileExt(sha, mode, path, updateCache, updateWd)
+
+def updateFileExt(sha, mode, path, updateCache, updateWd):
+ if cacheOnly:
+ updateWd = False
+
+ if updateWd:
+ pathComponents = path.split('/')
+ for x in xrange(1, len(pathComponents)):
+ p = '/'.join(pathComponents[0:x])
+
+ try:
+ createDir = not stat.S_ISDIR(os.lstat(p).st_mode)
+ except OSError:
+ createDir = True
+
+ if createDir:
+ try:
+ os.mkdir(p)
+ except OSError, e:
+ die("Couldn't create directory", p, e.strerror)
+
+ prog = ['git-cat-file', 'blob', sha]
+ if stat.S_ISREG(mode):
+ try:
+ os.unlink(path)
+ except OSError:
+ pass
+ if mode & 0100:
+ mode = 0777
+ else:
+ mode = 0666
+ fd = os.open(path, os.O_WRONLY | os.O_TRUNC | os.O_CREAT, mode)
+ proc = subprocess.Popen(prog, stdout=fd)
+ proc.wait()
+ os.close(fd)
+ elif stat.S_ISLNK(mode):
+ linkTarget = runProgram(prog)
+ os.symlink(linkTarget, path)
+ else:
+ assert(False)
+
+ if updateWd and updateCache:
+ runProgram(['git-update-index', '--add', '--', path])
+ elif updateCache:
+ runProgram(['git-update-index', '--add', '--cacheinfo',
+ '0%o' % mode, sha, path])
+
+def setIndexStages(path,
+ oSHA1, oMode,
+ aSHA1, aMode,
+ bSHA1, bMode,
+ clear=True):
+ istring = []
+ if clear:
+ istring.append("0 " + ("0" * 40) + "\t" + path + "\0")
+ if oMode:
+ istring.append("%o %s %d\t%s\0" % (oMode, oSHA1, 1, path))
+ if aMode:
+ istring.append("%o %s %d\t%s\0" % (aMode, aSHA1, 2, path))
+ if bMode:
+ istring.append("%o %s %d\t%s\0" % (bMode, bSHA1, 3, path))
+
+ runProgram(['git-update-index', '-z', '--index-info'],
+ input="".join(istring))
+
+def removeFile(clean, path):
+ updateCache = cacheOnly or clean
+ updateWd = not cacheOnly
+
+ if updateCache:
+ runProgram(['git-update-index', '--force-remove', '--', path])
+
+ if updateWd:
+ try:
+ os.unlink(path)
+ except OSError, e:
+ if e.errno != errno.ENOENT and e.errno != errno.EISDIR:
+ raise
+ try:
+ os.removedirs(os.path.dirname(path))
+ except OSError:
+ pass
+
+def uniquePath(path, branch):
+ def fileExists(path):
+ try:
+ os.lstat(path)
+ return True
+ except OSError, e:
+ if e.errno == errno.ENOENT:
+ return False
+ else:
+ raise
+
+ branch = branch.replace('/', '_')
+ newPath = path + '~' + branch
+ suffix = 0
+ while newPath in currentFileSet or \
+ newPath in currentDirectorySet or \
+ fileExists(newPath):
+ suffix += 1
+ newPath = path + '~' + branch + '_' + str(suffix)
+ currentFileSet.add(newPath)
+ return newPath
+
+# Cache entry management
+# ----------------------
+
class CacheEntry:
def __init__(self, path):
class Stage:
def __init__(self):
self.sha1 = None
self.mode = None
+
+ # Used for debugging only
+ def __str__(self):
+ if self.mode != None:
+ m = '0%o' % self.mode
+ else:
+ m = 'None'
+
+ if self.sha1:
+ sha1 = self.sha1
+ else:
+ sha1 = 'None'
+ return 'sha1: ' + sha1 + ' mode: ' + m
- self.stages = [Stage(), Stage(), Stage()]
+ self.stages = [Stage(), Stage(), Stage(), Stage()]
self.path = path
+ self.processed = False
+
+ def __str__(self):
+ return 'path: ' + self.path + ' stages: ' + repr([str(x) for x in self.stages])
+
+class CacheEntryContainer:
+ def __init__(self):
+ self.entries = {}
-unmergedRE = re.compile('^([0-9]+) ([0-9a-f]{40}) ([1-3])\t(.*)$')
+ def add(self, entry):
+ self.entries[entry.path] = entry
+
+ def get(self, path):
+ return self.entries.get(path)
+
+ def __iter__(self):
+ return self.entries.itervalues()
+
+unmergedRE = re.compile(r'^([0-7]+) ([0-9a-f]{40}) ([1-3])\t(.*)$', re.S)
def unmergedCacheEntries():
'''Create a dictionary mapping file names to CacheEntry
objects. The dictionary contains one entry for every path with a
lines = runProgram(['git-ls-files', '-z', '--unmerged']).split('\0')
lines.pop()
- res = {}
+ res = CacheEntryContainer()
for l in lines:
m = unmergedRE.match(l)
if m:
mode = int(m.group(1), 8)
sha1 = m.group(2)
- stage = int(m.group(3)) - 1
+ stage = int(m.group(3))
path = m.group(4)
- if res.has_key(path):
- e = res[path]
- else:
+ e = res.get(path)
+ if not e:
e = CacheEntry(path)
- res[path] = e
-
+ res.add(e)
+
e.stages[stage].mode = mode
e.stages[stage].sha1 = sha1
else:
- die('Error: Merge program failed: Unexpected output from', \
+ die('Error: Merge program failed: Unexpected output from',
'git-ls-files:', l)
return res
-def mergeTrees(head, merge, common, branch1Name, branch2Name,
- cleanCache):
- '''Merge the trees 'head' and 'merge' with the common ancestor
- 'common'. The name of the head branch is 'branch1Name' and the name of
- the merge branch is 'branch2Name'. Return a tuple (tree, cleanMerge)
- where tree is the resulting tree and cleanMerge is True iff the
- merge was clean.'''
+lsTreeRE = re.compile(r'^([0-7]+) (\S+) ([0-9a-f]{40})\t(.*)\n$', re.S)
+def getCacheEntry(path, origTree, aTree, bTree):
+ '''Returns a CacheEntry object which doesn't have to correspond to
+ a real cache entry in Git's index.'''
- assert(isSha(head) and isSha(merge) and isSha(common))
+ def parse(out):
+ if out == '':
+ return [None, None]
+ else:
+ m = lsTreeRE.match(out)
+ if not m:
+ die('Unexpected output from git-ls-tree:', out)
+ elif m.group(2) == 'blob':
+ return [m.group(3), int(m.group(1), 8)]
+ else:
+ return [None, None]
- if common == merge:
- print 'Already uptodate!'
- return [head, True]
+ res = CacheEntry(path)
- if cleanCache:
- updateArg = '-i'
- else:
- updateArg = '-u'
+ [oSha, oMode] = parse(runProgram(['git-ls-tree', origTree, '--', path]))
+ [aSha, aMode] = parse(runProgram(['git-ls-tree', aTree, '--', path]))
+ [bSha, bMode] = parse(runProgram(['git-ls-tree', bTree, '--', path]))
- runProgram(['git-read-tree', updateArg, '-m', common, head, merge])
- cleanMerge = True
+ res.stages[1].sha1 = oSha
+ res.stages[1].mode = oMode
+ res.stages[2].sha1 = aSha
+ res.stages[2].mode = aMode
+ res.stages[3].sha1 = bSha
+ res.stages[3].mode = bMode
- [tree, code] = runProgram('git-write-tree', returnCode=True)
- tree = tree.rstrip()
- if code != 0:
- [files, dirs] = getFilesAndDirs(head)
- [filesM, dirsM] = getFilesAndDirs(merge)
- files.union_update(filesM)
- dirs.union_update(dirsM)
-
- cleanMerge = True
- entries = unmergedCacheEntries()
- for name in entries:
- if not processEntry(entries[name], branch1Name, branch2Name,
- files, dirs, cleanCache):
- cleanMerge = False
-
- if cleanMerge or cleanCache:
- tree = runProgram('git-write-tree').rstrip()
+ return res
+
+# Rename detection and handling
+# -----------------------------
+
+class RenameEntry:
+ def __init__(self,
+ src, srcSha, srcMode, srcCacheEntry,
+ dst, dstSha, dstMode, dstCacheEntry,
+ score):
+ self.srcName = src
+ self.srcSha = srcSha
+ self.srcMode = srcMode
+ self.srcCacheEntry = srcCacheEntry
+ self.dstName = dst
+ self.dstSha = dstSha
+ self.dstMode = dstMode
+ self.dstCacheEntry = dstCacheEntry
+ self.score = score
+
+ self.processed = False
+
+class RenameEntryContainer:
+ def __init__(self):
+ self.entriesSrc = {}
+ self.entriesDst = {}
+
+ def add(self, entry):
+ self.entriesSrc[entry.srcName] = entry
+ self.entriesDst[entry.dstName] = entry
+
+ def getSrc(self, path):
+ return self.entriesSrc.get(path)
+
+ def getDst(self, path):
+ return self.entriesDst.get(path)
+
+ def __iter__(self):
+ return self.entriesSrc.itervalues()
+
+parseDiffRenamesRE = re.compile('^:([0-7]+) ([0-7]+) ([0-9a-f]{40}) ([0-9a-f]{40}) R([0-9]*)$')
+def getRenames(tree, oTree, aTree, bTree, cacheEntries):
+ '''Get information of all renames which occured between 'oTree' and
+ 'tree'. We need the three trees in the merge ('oTree', 'aTree' and
+ 'bTree') to be able to associate the correct cache entries with
+ the rename information. 'tree' is always equal to either aTree or bTree.'''
+
+ assert(tree == aTree or tree == bTree)
+ inp = runProgram(['git-diff-tree', '-M', '--diff-filter=R', '-r',
+ '-z', oTree, tree])
+
+ ret = RenameEntryContainer()
+ try:
+ recs = inp.split("\0")
+ recs.pop() # remove last entry (which is '')
+ it = recs.__iter__()
+ while True:
+ rec = it.next()
+ m = parseDiffRenamesRE.match(rec)
+
+ if not m:
+ die('Unexpected output from git-diff-tree:', rec)
+
+ srcMode = int(m.group(1), 8)
+ dstMode = int(m.group(2), 8)
+ srcSha = m.group(3)
+ dstSha = m.group(4)
+ score = m.group(5)
+ src = it.next()
+ dst = it.next()
+
+ srcCacheEntry = cacheEntries.get(src)
+ if not srcCacheEntry:
+ srcCacheEntry = getCacheEntry(src, oTree, aTree, bTree)
+ cacheEntries.add(srcCacheEntry)
+
+ dstCacheEntry = cacheEntries.get(dst)
+ if not dstCacheEntry:
+ dstCacheEntry = getCacheEntry(dst, oTree, aTree, bTree)
+ cacheEntries.add(dstCacheEntry)
+
+ ret.add(RenameEntry(src, srcSha, srcMode, srcCacheEntry,
+ dst, dstSha, dstMode, dstCacheEntry,
+ score))
+ except StopIteration:
+ pass
+ return ret
+
+def fmtRename(src, dst):
+ srcPath = src.split('/')
+ dstPath = dst.split('/')
+ path = []
+ endIndex = min(len(srcPath), len(dstPath)) - 1
+ for x in range(0, endIndex):
+ if srcPath[x] == dstPath[x]:
+ path.append(srcPath[x])
else:
- tree = None
+ endIndex = x
+ break
+
+ if len(path) > 0:
+ return '/'.join(path) + \
+ '/{' + '/'.join(srcPath[endIndex:]) + ' => ' + \
+ '/'.join(dstPath[endIndex:]) + '}'
else:
- cleanMerge = True
+ return src + ' => ' + dst
- return [tree, cleanMerge]
+def processRenames(renamesA, renamesB, branchNameA, branchNameB):
+ srcNames = Set()
+ for x in renamesA:
+ srcNames.add(x.srcName)
+ for x in renamesB:
+ srcNames.add(x.srcName)
-def processEntry(entry, branch1Name, branch2Name, files, dirs, cleanCache):
- '''Merge one cache entry. 'files' is a Set with the files in both of
- the heads that we are going to merge. 'dirs' contains the
- corresponding data for directories. If 'cleanCache' is True no
- non-zero stages will be left in the cache for the path
- corresponding to the entry 'entry'.'''
+ cleanMerge = True
+ for path in srcNames:
+ if renamesA.getSrc(path):
+ renames1 = renamesA
+ renames2 = renamesB
+ branchName1 = branchNameA
+ branchName2 = branchNameB
+ else:
+ renames1 = renamesB
+ renames2 = renamesA
+ branchName1 = branchNameB
+ branchName2 = branchNameA
+
+ ren1 = renames1.getSrc(path)
+ ren2 = renames2.getSrc(path)
-# cleanCache == True => Don't leave any non-stage 0 entries in the cache and
-# don't update the working directory
-# False => Leave unmerged entries and update the working directory
+ ren1.dstCacheEntry.processed = True
+ ren1.srcCacheEntry.processed = True
-# clean == True => non-conflict case
-# False => conflict case
+ if ren1.processed:
+ continue
-# If cleanCache == False then the cache shouldn't be updated if clean == False
+ ren1.processed = True
- def updateFile(clean, sha, mode, path, onlyWd=False):
- updateCache = not onlyWd and (cleanCache or (not cleanCache and clean))
- updateWd = onlyWd or (not cleanCache and clean)
+ if ren2:
+ # Renamed in 1 and renamed in 2
+ assert(ren1.srcName == ren2.srcName)
+ ren2.dstCacheEntry.processed = True
+ ren2.processed = True
- if updateWd:
- prog = ['git-cat-file', 'blob', sha]
- if stat.S_ISREG(mode):
- try:
- os.unlink(path)
- except OSError:
- pass
- if mode & 0100:
- mode = 0777
+ if ren1.dstName != ren2.dstName:
+ output('CONFLICT (rename/rename): Rename',
+ fmtRename(path, ren1.dstName), 'in branch', branchName1,
+ 'rename', fmtRename(path, ren2.dstName), 'in',
+ branchName2)
+ cleanMerge = False
+
+ if ren1.dstName in currentDirectorySet:
+ dstName1 = uniquePath(ren1.dstName, branchName1)
+ output(ren1.dstName, 'is a directory in', branchName2,
+ 'adding as', dstName1, 'instead.')
+ removeFile(False, ren1.dstName)
else:
- mode = 0666
- fd = os.open(path, os.O_WRONLY | os.O_TRUNC | os.O_CREAT, mode)
- proc = subprocess.Popen(prog, stdout=fd)
- proc.wait()
- os.close(fd)
- elif stat.S_ISLNK(mode):
- linkTarget = runProgram(prog)
- os.symlink(linkTarget, path)
+ dstName1 = ren1.dstName
+
+ if ren2.dstName in currentDirectorySet:
+ dstName2 = uniquePath(ren2.dstName, branchName2)
+ output(ren2.dstName, 'is a directory in', branchName1,
+ 'adding as', dstName2, 'instead.')
+ removeFile(False, ren2.dstName)
+ else:
+ dstName2 = ren2.dstName
+ setIndexStages(dstName1,
+ None, None,
+ ren1.dstSha, ren1.dstMode,
+ None, None)
+ setIndexStages(dstName2,
+ None, None,
+ None, None,
+ ren2.dstSha, ren2.dstMode)
+
else:
- assert(False)
+ removeFile(True, ren1.srcName)
- if updateWd and updateCache:
- runProgram(['git-update-cache', '--add', '--', path])
- elif updateCache:
- runProgram(['git-update-cache', '--add', '--cacheinfo',
- '0%o' % mode, sha, path])
+ [resSha, resMode, clean, merge] = \
+ mergeFile(ren1.srcName, ren1.srcSha, ren1.srcMode,
+ ren1.dstName, ren1.dstSha, ren1.dstMode,
+ ren2.dstName, ren2.dstSha, ren2.dstMode,
+ branchName1, branchName2)
- def removeFile(clean, path):
- if cleanCache or (not cleanCache and clean):
- runProgram(['git-update-cache', '--force-remove', '--', path])
+ if merge or not clean:
+ output('Renaming', fmtRename(path, ren1.dstName))
- if not cleanCache and clean:
- try:
- os.unlink(path)
- except OSError, e:
- if e.errno != errno.ENOENT and e.errno != errno.EISDIR:
- raise
+ if merge:
+ output('Auto-merging', ren1.dstName)
- def uniquePath(path, branch):
- newPath = path + '_' + branch
- suffix = 0
- while newPath in files or newPath in dirs:
- suffix += 1
- newPath = path + '_' + branch + '_' + str(suffix)
- files.add(newPath)
- return newPath
+ if not clean:
+ output('CONFLICT (content): merge conflict in',
+ ren1.dstName)
+ cleanMerge = False
- debug('processing', entry.path, 'clean cache:', cleanCache)
+ if not cacheOnly:
+ setIndexStages(ren1.dstName,
+ ren1.srcSha, ren1.srcMode,
+ ren1.dstSha, ren1.dstMode,
+ ren2.dstSha, ren2.dstMode)
+
+ updateFile(clean, resSha, resMode, ren1.dstName)
+ else:
+ removeFile(True, ren1.srcName)
+
+ # Renamed in 1, maybe changed in 2
+ if renamesA == renames1:
+ stage = 3
+ else:
+ stage = 2
+
+ srcShaOtherBranch = ren1.srcCacheEntry.stages[stage].sha1
+ srcModeOtherBranch = ren1.srcCacheEntry.stages[stage].mode
+
+ dstShaOtherBranch = ren1.dstCacheEntry.stages[stage].sha1
+ dstModeOtherBranch = ren1.dstCacheEntry.stages[stage].mode
+
+ tryMerge = False
+
+ if ren1.dstName in currentDirectorySet:
+ newPath = uniquePath(ren1.dstName, branchName1)
+ output('CONFLICT (rename/directory): Rename',
+ fmtRename(ren1.srcName, ren1.dstName), 'in', branchName1,
+ 'directory', ren1.dstName, 'added in', branchName2)
+ output('Renaming', ren1.srcName, 'to', newPath, 'instead')
+ cleanMerge = False
+ removeFile(False, ren1.dstName)
+ updateFile(False, ren1.dstSha, ren1.dstMode, newPath)
+ elif srcShaOtherBranch == None:
+ output('CONFLICT (rename/delete): Rename',
+ fmtRename(ren1.srcName, ren1.dstName), 'in',
+ branchName1, 'and deleted in', branchName2)
+ cleanMerge = False
+ updateFile(False, ren1.dstSha, ren1.dstMode, ren1.dstName)
+ elif dstShaOtherBranch:
+ newPath = uniquePath(ren1.dstName, branchName2)
+ output('CONFLICT (rename/add): Rename',
+ fmtRename(ren1.srcName, ren1.dstName), 'in',
+ branchName1 + '.', ren1.dstName, 'added in', branchName2)
+ output('Adding as', newPath, 'instead')
+ updateFile(False, dstShaOtherBranch, dstModeOtherBranch, newPath)
+ cleanMerge = False
+ tryMerge = True
+ elif renames2.getDst(ren1.dstName):
+ dst2 = renames2.getDst(ren1.dstName)
+ newPath1 = uniquePath(ren1.dstName, branchName1)
+ newPath2 = uniquePath(dst2.dstName, branchName2)
+ output('CONFLICT (rename/rename): Rename',
+ fmtRename(ren1.srcName, ren1.dstName), 'in',
+ branchName1+'. Rename',
+ fmtRename(dst2.srcName, dst2.dstName), 'in', branchName2)
+ output('Renaming', ren1.srcName, 'to', newPath1, 'and',
+ dst2.srcName, 'to', newPath2, 'instead')
+ removeFile(False, ren1.dstName)
+ updateFile(False, ren1.dstSha, ren1.dstMode, newPath1)
+ updateFile(False, dst2.dstSha, dst2.dstMode, newPath2)
+ dst2.processed = True
+ cleanMerge = False
+ else:
+ tryMerge = True
+
+ if tryMerge:
+
+ oName, oSHA1, oMode = ren1.srcName, ren1.srcSha, ren1.srcMode
+ aName, bName = ren1.dstName, ren1.srcName
+ aSHA1, bSHA1 = ren1.dstSha, srcShaOtherBranch
+ aMode, bMode = ren1.dstMode, srcModeOtherBranch
+ aBranch, bBranch = branchName1, branchName2
+
+ if renamesA != renames1:
+ aName, bName = bName, aName
+ aSHA1, bSHA1 = bSHA1, aSHA1
+ aMode, bMode = bMode, aMode
+ aBranch, bBranch = bBranch, aBranch
+
+ [resSha, resMode, clean, merge] = \
+ mergeFile(oName, oSHA1, oMode,
+ aName, aSHA1, aMode,
+ bName, bSHA1, bMode,
+ aBranch, bBranch);
+
+ if merge or not clean:
+ output('Renaming', fmtRename(ren1.srcName, ren1.dstName))
+
+ if merge:
+ output('Auto-merging', ren1.dstName)
+
+ if not clean:
+ output('CONFLICT (rename/modify): Merge conflict in',
+ ren1.dstName)
+ cleanMerge = False
+
+ if not cacheOnly:
+ setIndexStages(ren1.dstName,
+ oSHA1, oMode,
+ aSHA1, aMode,
+ bSHA1, bMode)
+
+ updateFile(clean, resSha, resMode, ren1.dstName)
+
+ return cleanMerge
+
+# Per entry merge function
+# ------------------------
+
+def processEntry(entry, branch1Name, branch2Name):
+ '''Merge one cache entry.'''
+
+ debug('processing', entry.path, 'clean cache:', cacheOnly)
cleanMerge = True
path = entry.path
- oSha = entry.stages[0].sha1
- oMode = entry.stages[0].mode
- aSha = entry.stages[1].sha1
- aMode = entry.stages[1].mode
- bSha = entry.stages[2].sha1
- bMode = entry.stages[2].mode
+ oSha = entry.stages[1].sha1
+ oMode = entry.stages[1].mode
+ aSha = entry.stages[2].sha1
+ aMode = entry.stages[2].mode
+ bSha = entry.stages[3].sha1
+ bMode = entry.stages[3].mode
assert(oSha == None or isSha(oSha))
assert(aSha == None or isSha(aSha))
(not aSha and bSha == oSha):
# Deleted in both or deleted in one and unchanged in the other
if aSha:
- print 'Removing ' + path
+ output('Removing', path)
removeFile(True, path)
else:
# Deleted in one and changed in the other
cleanMerge = False
if not aSha:
- print 'CONFLICT (del/mod): "' + path + '" deleted in', \
- branch1Name, 'and modified in', branch2Name, \
- '. Version', branch2Name, ' of "' + path + \
- '" left in tree'
+ output('CONFLICT (delete/modify):', path, 'deleted in',
+ branch1Name, 'and modified in', branch2Name + '.',
+ 'Version', branch2Name, 'of', path, 'left in tree.')
mode = bMode
sha = bSha
else:
- print 'CONFLICT (mod/del): "' + path + '" deleted in', \
- branch2Name, 'and modified in', branch1Name + \
- '. Version', branch1Name, 'of "' + path + \
- '" left in tree'
+ output('CONFLICT (modify/delete):', path, 'deleted in',
+ branch2Name, 'and modified in', branch1Name + '.',
+ 'Version', branch1Name, 'of', path, 'left in tree.')
mode = aMode
sha = aSha
updateFile(False, sha, mode, path)
-
+
elif (not oSha and aSha and not bSha) or \
(not oSha and not aSha and bSha):
#
otherBranch = branch2Name
mode = aMode
sha = aSha
- conf = 'file/dir'
+ conf = 'file/directory'
else:
addBranch = branch2Name
otherBranch = branch1Name
mode = bMode
sha = bSha
- conf = 'dir/file'
+ conf = 'directory/file'
- if path in dirs:
+ if path in currentDirectorySet:
cleanMerge = False
newPath = uniquePath(path, addBranch)
- print 'CONFLICT (' + conf + \
- '): There is a directory with name "' + path + '" in', \
- otherBranch + '. Adding "' + path + '" as "' + newPath + '"'
+ output('CONFLICT (' + conf + '):',
+ 'There is a directory with name', path, 'in',
+ otherBranch + '. Adding', path, 'as', newPath)
removeFile(False, path)
- path = newPath
+ updateFile(False, sha, mode, newPath)
else:
- print 'Adding "' + path + '"'
-
- updateFile(True, sha, mode, path)
+ output('Adding', path)
+ updateFile(True, sha, mode, path)
elif not oSha and aSha and bSha:
#
if aSha == bSha:
if aMode != bMode:
cleanMerge = False
- print 'CONFLICT: File "' + path + \
- '" added identically in both branches,', \
- 'but permissions conflict', '0%o' % aMode, '->', \
- '0%o' % bMode
- print 'CONFLICT: adding with permission:', '0%o' % aMode
+ output('CONFLICT: File', path,
+ 'added identically in both branches, but permissions',
+ 'conflict', '0%o' % aMode, '->', '0%o' % bMode)
+ output('CONFLICT: adding with permission:', '0%o' % aMode)
updateFile(False, aSha, aMode, path)
else:
cleanMerge = False
newPath1 = uniquePath(path, branch1Name)
newPath2 = uniquePath(path, branch2Name)
- print 'CONFLICT (add/add): File "' + path + \
- '" added non-identically in both branches.'
+ output('CONFLICT (add/add): File', path,
+ 'added non-identically in both branches. Adding as',
+ newPath1, 'and', newPath2, 'instead.')
removeFile(False, path)
updateFile(False, aSha, aMode, newPath1)
updateFile(False, bSha, bMode, newPath2)
#
# case D: Modified in both, but differently.
#
- print 'Auto-merging', path
- orig = runProgram(['git-unpack-file', oSha]).rstrip()
- src1 = runProgram(['git-unpack-file', aSha]).rstrip()
- src2 = runProgram(['git-unpack-file', bSha]).rstrip()
- [out, ret] = runProgram(['merge',
- '-L', branch1Name + '/' + path,
- '-L', 'orig/' + path,
- '-L', branch2Name + '/' + path,
- src1, orig, src2], returnCode=True)
-
- if aMode == oMode:
- mode = bMode
+ output('Auto-merging', path)
+ [sha, mode, clean, dummy] = \
+ mergeFile(path, oSha, oMode,
+ path, aSha, aMode,
+ path, bSha, bMode,
+ branch1Name, branch2Name)
+ if clean:
+ updateFile(True, sha, mode, path)
else:
- mode = aMode
-
- sha = runProgram(['git-hash-object', '-t', 'blob', '-w',
- src1]).rstrip()
-
- if ret != 0:
cleanMerge = False
- print 'CONFLICT (content): Merge conflict in "' + path + '".'
+ output('CONFLICT (content): Merge conflict in', path)
- if cleanCache:
+ if cacheOnly:
updateFile(False, sha, mode, path)
else:
- updateFile(True, aSha, aMode, path)
- updateFile(False, sha, mode, path, True)
- else:
- updateFile(True, sha, mode, path)
-
- os.unlink(orig)
- os.unlink(src1)
- os.unlink(src2)
+ updateFileExt(sha, mode, path, updateCache=False, updateWd=True)
else:
die("ERROR: Fatal merge failure, shouldn't happen.")
# main entry point as merge strategy module
# The first parameters up to -- are merge bases, and the rest are heads.
-# This strategy module figures out merge bases itself, so we only
-# get heads.
if len(sys.argv) < 4:
usage()
+bases = []
for nextArg in xrange(1, len(sys.argv)):
if sys.argv[nextArg] == '--':
if len(sys.argv) != nextArg + 3:
try:
h1 = firstBranch = sys.argv[nextArg + 1]
h2 = secondBranch = sys.argv[nextArg + 2]
- except IndexError:
+ except IndexError:
usage()
break
+ else:
+ bases.append(sys.argv[nextArg])
print 'Merging', h1, 'with', h2
h1 = runProgram(['git-rev-parse', '--verify', h1 + '^0']).rstrip()
h2 = runProgram(['git-rev-parse', '--verify', h2 + '^0']).rstrip()
- graph = buildGraph([h1, h2])
-
- [res, clean] = merge(graph.shaMap[h1], graph.shaMap[h2],
- firstBranch, secondBranch, graph)
+ if len(bases) == 1:
+ base = runProgram(['git-rev-parse', '--verify',
+ bases[0] + '^0']).rstrip()
+ ancestor = Commit(base, None)
+ [dummy, clean] = merge(Commit(h1, None), Commit(h2, None),
+ firstBranch, secondBranch, None, 0,
+ ancestor)
+ else:
+ graph = buildGraph([h1, h2])
+ [dummy, clean] = merge(graph.shaMap[h1], graph.shaMap[h2],
+ firstBranch, secondBranch, graph)
print ''
except:
- traceback.print_exc(None, sys.stderr)
- sys.exit(2)
+ if isinstance(sys.exc_info()[1], SystemExit):
+ raise
+ else:
+ traceback.print_exc(None, sys.stderr)
+ sys.exit(2)
if clean:
sys.exit(0)