mirror of
https://github.com/git/git.git
synced 2024-10-04 05:11:31 +02:00
499 lines
14 KiB
Python
Executable File
499 lines
14 KiB
Python
Executable File
#!/usr/bin/python
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#
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# p4-fast-export.py
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#
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# Author: Simon Hausmann <hausmann@kde.org>
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# License: MIT <http://www.opensource.org/licenses/mit-license.php>
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#
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# TODO:
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# - support integrations (at least p4i)
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# - support p4 submit (hah!)
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# - emulate p4's delete behavior: if a directory becomes empty delete it. continue
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# with parent dir until non-empty dir is found.
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#
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import os, string, sys, time, os.path
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import marshal, popen2, getopt, sha
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from sets import Set;
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cacheDebug = False
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silent = False
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knownBranches = Set()
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createdBranches = Set()
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committedChanges = Set()
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branch = "refs/heads/master"
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globalPrefix = previousDepotPath = os.popen("git-repo-config --get p4.depotpath").read()
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detectBranches = False
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changesFile = ""
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if len(globalPrefix) != 0:
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globalPrefix = globalPrefix[:-1]
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try:
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opts, args = getopt.getopt(sys.argv[1:], "", [ "branch=", "detect-branches", "changesfile=", "silent", "known-branches=",
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"cache-debug" ])
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except getopt.GetoptError:
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print "fixme, syntax error"
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sys.exit(1)
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for o, a in opts:
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if o == "--branch":
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branch = "refs/heads/" + a
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elif o == "--detect-branches":
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detectBranches = True
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elif o == "--changesfile":
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changesFile = a
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elif o == "--silent":
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silent= True
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elif o == "--known-branches":
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for branch in open(a).readlines():
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knownBranches.add(branch[:-1])
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elif o == "--cache-debug":
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cacheDebug = True
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if len(args) == 0 and len(globalPrefix) != 0:
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if not silent:
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print "[using previously specified depot path %s]" % globalPrefix
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elif len(args) != 1:
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print "usage: %s //depot/path[@revRange]" % sys.argv[0]
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print "\n example:"
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print " %s //depot/my/project/ -- to import the current head"
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print " %s //depot/my/project/@all -- to import everything"
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print " %s //depot/my/project/@1,6 -- to import only from revision 1 to 6"
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print ""
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print " (a ... is not needed in the path p4 specification, it's added implicitly)"
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print ""
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sys.exit(1)
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else:
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if len(globalPrefix) != 0 and globalPrefix != args[0]:
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print "previous import used depot path %s and now %s was specified. this doesn't work!" % (globalPrefix, args[0])
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sys.exit(1)
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globalPrefix = args[0]
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changeRange = ""
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revision = ""
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users = {}
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initialParent = ""
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lastChange = 0
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initialTag = ""
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if globalPrefix.find("@") != -1:
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atIdx = globalPrefix.index("@")
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changeRange = globalPrefix[atIdx:]
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if changeRange == "@all":
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changeRange = ""
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elif changeRange.find(",") == -1:
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revision = changeRange
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changeRange = ""
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globalPrefix = globalPrefix[0:atIdx]
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elif globalPrefix.find("#") != -1:
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hashIdx = globalPrefix.index("#")
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revision = globalPrefix[hashIdx:]
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globalPrefix = globalPrefix[0:hashIdx]
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elif len(previousDepotPath) == 0:
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revision = "#head"
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if globalPrefix.endswith("..."):
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globalPrefix = globalPrefix[:-3]
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if not globalPrefix.endswith("/"):
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globalPrefix += "/"
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def p4File(depotPath):
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cacheKey = "/tmp/p4cache/data-" + sha.new(depotPath).hexdigest()
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data = 0
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try:
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if not cacheDebug:
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raise
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data = open(cacheKey, "rb").read()
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except:
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data = os.popen("p4 print -q \"%s\"" % depotPath, "rb").read()
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if cacheDebug:
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open(cacheKey, "wb").write(data)
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return data
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def p4CmdList(cmd):
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fullCmd = "p4 -G %s" % cmd;
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cacheKey = sha.new(fullCmd).hexdigest()
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cacheKey = "/tmp/p4cache/cmd-" + cacheKey
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cached = True
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pipe = 0
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try:
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if not cacheDebug:
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raise
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pipe = open(cacheKey, "rb")
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except:
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cached = False
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pipe = os.popen(fullCmd, "rb")
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result = []
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try:
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while True:
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entry = marshal.load(pipe)
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result.append(entry)
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except EOFError:
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pass
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pipe.close()
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if not cached and cacheDebug:
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pipe = open(cacheKey, "wb")
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for r in result:
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marshal.dump(r, pipe)
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pipe.close()
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return result
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def p4Cmd(cmd):
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list = p4CmdList(cmd)
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result = {}
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for entry in list:
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result.update(entry)
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return result;
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def extractFilesFromCommit(commit):
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files = []
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fnum = 0
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while commit.has_key("depotFile%s" % fnum):
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path = commit["depotFile%s" % fnum]
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if not path.startswith(globalPrefix):
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# if not silent:
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# print "\nchanged files: ignoring path %s outside of %s in change %s" % (path, globalPrefix, change)
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fnum = fnum + 1
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continue
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file = {}
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file["path"] = path
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file["rev"] = commit["rev%s" % fnum]
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file["action"] = commit["action%s" % fnum]
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file["type"] = commit["type%s" % fnum]
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files.append(file)
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fnum = fnum + 1
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return files
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def isSubPathOf(first, second):
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if not first.startswith(second):
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return False
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if first == second:
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return True
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return first[len(second)] == "/"
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def branchesForCommit(files):
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global knownBranches
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branches = Set()
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for file in files:
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relativePath = file["path"][len(globalPrefix):]
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# strip off the filename
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relativePath = relativePath[0:relativePath.rfind("/")]
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# if len(branches) == 0:
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# branches.add(relativePath)
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# knownBranches.add(relativePath)
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# continue
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###### this needs more testing :)
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knownBranch = False
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for branch in branches:
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if relativePath == branch:
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knownBranch = True
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break
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# if relativePath.startswith(branch):
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if isSubPathOf(relativePath, branch):
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knownBranch = True
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break
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# if branch.startswith(relativePath):
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if isSubPathOf(branch, relativePath):
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branches.remove(branch)
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break
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if knownBranch:
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continue
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for branch in knownBranches:
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#if relativePath.startswith(branch):
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if isSubPathOf(relativePath, branch):
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if len(branches) == 0:
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relativePath = branch
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else:
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knownBranch = True
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break
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if knownBranch:
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continue
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branches.add(relativePath)
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knownBranches.add(relativePath)
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return branches
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def findBranchParent(branchPrefix, files):
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for file in files:
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path = file["path"]
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if not path.startswith(branchPrefix):
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continue
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action = file["action"]
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if action != "integrate" and action != "branch":
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continue
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rev = file["rev"]
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depotPath = path + "#" + rev
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log = p4CmdList("filelog \"%s\"" % depotPath)
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if len(log) != 1:
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print "eek! I got confused by the filelog of %s" % depotPath
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sys.exit(1);
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log = log[0]
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if log["action0"] != action:
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print "eek! wrong action in filelog for %s : found %s, expected %s" % (depotPath, log["action0"], action)
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sys.exit(1);
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branchAction = log["how0,0"]
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# if branchAction == "branch into" or branchAction == "ignored":
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# continue # ignore for branching
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if not branchAction.endswith(" from"):
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continue # ignore for branching
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# print "eek! file %s was not branched from but instead: %s" % (depotPath, branchAction)
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# sys.exit(1);
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source = log["file0,0"]
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if source.startswith(branchPrefix):
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continue
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lastSourceRev = log["erev0,0"]
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sourceLog = p4CmdList("filelog -m 1 \"%s%s\"" % (source, lastSourceRev))
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if len(sourceLog) != 1:
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print "eek! I got confused by the source filelog of %s%s" % (source, lastSourceRev)
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sys.exit(1);
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sourceLog = sourceLog[0]
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relPath = source[len(globalPrefix):]
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# strip off the filename
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relPath = relPath[0:relPath.rfind("/")]
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for branch in knownBranches:
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if isSubPathOf(relPath, branch):
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# print "determined parent branch branch %s due to change in file %s" % (branch, source)
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return "refs/heads/%s" % branch
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# else:
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# print "%s is not a subpath of branch %s" % (relPath, branch)
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return ""
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def commit(details, files, branch, branchPrefix, parent):
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global users
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global lastChange
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global committedChanges
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epoch = details["time"]
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author = details["user"]
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gitStream.write("commit %s\n" % branch)
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gitStream.write("mark :%s\n" % details["change"])
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committedChanges.add(int(details["change"]))
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committer = ""
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if author in users:
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committer = "%s %s %s" % (users[author], epoch, tz)
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else:
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committer = "%s <a@b> %s %s" % (author, epoch, tz)
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gitStream.write("committer %s\n" % committer)
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gitStream.write("data <<EOT\n")
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gitStream.write(details["desc"])
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gitStream.write("\n[ imported from %s; change %s ]\n" % (branchPrefix, details["change"]))
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gitStream.write("EOT\n\n")
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if len(parent) > 0:
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gitStream.write("from %s\n" % parent)
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for file in files:
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path = file["path"]
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if not path.startswith(branchPrefix):
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# if not silent:
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# print "\nchanged files: ignoring path %s outside of branch prefix %s in change %s" % (path, branchPrefix, details["change"])
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continue
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rev = file["rev"]
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depotPath = path + "#" + rev
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relPath = path[len(branchPrefix):]
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action = file["action"]
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if action == "delete":
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gitStream.write("D %s\n" % relPath)
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else:
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mode = 644
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if file["type"].startswith("x"):
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mode = 755
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data = p4File(depotPath)
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gitStream.write("M %s inline %s\n" % (mode, relPath))
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gitStream.write("data %s\n" % len(data))
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gitStream.write(data)
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gitStream.write("\n")
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gitStream.write("\n")
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lastChange = int(details["change"])
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def extractFilesInCommitToBranch(files, branchPrefix):
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newFiles = []
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for file in files:
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path = file["path"]
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if path.startswith(branchPrefix):
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newFiles.append(file)
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return newFiles
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def getUserMap():
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users = {}
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for output in p4CmdList("users"):
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if not output.has_key("User"):
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continue
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users[output["User"]] = output["FullName"] + " <" + output["Email"] + ">"
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return users
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users = getUserMap()
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if len(changeRange) == 0:
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try:
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sout, sin, serr = popen2.popen3("git-name-rev --tags `git-rev-parse %s`" % branch)
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output = sout.read()
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if output.endswith("\n"):
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output = output[:-1]
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tagIdx = output.index(" tags/p4/")
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caretIdx = output.find("^")
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endPos = len(output)
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if caretIdx != -1:
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endPos = caretIdx
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rev = int(output[tagIdx + 9 : endPos]) + 1
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changeRange = "@%s,#head" % rev
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initialParent = os.popen("git-rev-parse %s" % branch).read()[:-1]
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initialTag = "p4/%s" % (int(rev) - 1)
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except:
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pass
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tz = - time.timezone / 36
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tzsign = ("%s" % tz)[0]
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if tzsign != '+' and tzsign != '-':
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tz = "+" + ("%s" % tz)
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gitOutput, gitStream, gitError = popen2.popen3("git-fast-import")
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if len(revision) > 0:
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print "Doing initial import of %s from revision %s" % (globalPrefix, revision)
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details = { "user" : "git perforce import user", "time" : int(time.time()) }
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details["desc"] = "Initial import of %s from the state at revision %s" % (globalPrefix, revision)
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details["change"] = revision
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newestRevision = 0
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fileCnt = 0
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for info in p4CmdList("files %s...%s" % (globalPrefix, revision)):
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change = int(info["change"])
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if change > newestRevision:
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newestRevision = change
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if info["action"] == "delete":
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continue
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for prop in [ "depotFile", "rev", "action", "type" ]:
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details["%s%s" % (prop, fileCnt)] = info[prop]
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fileCnt = fileCnt + 1
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details["change"] = newestRevision
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try:
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commit(details, extractFilesFromCommit(details), branch, globalPrefix)
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except:
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print gitError.read()
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else:
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changes = []
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if len(changesFile) > 0:
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output = open(changesFile).readlines()
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changeSet = Set()
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for line in output:
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changeSet.add(int(line))
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for change in changeSet:
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changes.append(change)
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changes.sort()
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else:
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output = os.popen("p4 changes %s...%s" % (globalPrefix, changeRange)).readlines()
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for line in output:
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changeNum = line.split(" ")[1]
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changes.append(changeNum)
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changes.reverse()
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if len(changes) == 0:
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if not silent:
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print "no changes to import!"
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sys.exit(1)
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cnt = 1
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for change in changes:
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description = p4Cmd("describe %s" % change)
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if not silent:
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sys.stdout.write("\rimporting revision %s (%s%%)" % (change, cnt * 100 / len(changes)))
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sys.stdout.flush()
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cnt = cnt + 1
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# try:
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files = extractFilesFromCommit(description)
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if detectBranches:
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for branch in branchesForCommit(files):
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knownBranches.add(branch)
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branchPrefix = globalPrefix + branch + "/"
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filesForCommit = extractFilesInCommitToBranch(files, branchPrefix)
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parent = ""
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########### remove cnt!!!
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if branch not in createdBranches and cnt > 2:
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createdBranches.add(branch)
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parent = findBranchParent(branchPrefix, files)
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if parent == branch:
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parent = ""
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# elif len(parent) > 0:
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# print "%s branched off of %s" % (branch, parent)
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branch = "refs/heads/" + branch
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commit(description, files, branch, branchPrefix, parent)
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else:
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commit(description, filesForCommit, branch, globalPrefix, initialParent)
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initialParent = ""
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# except:
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# print gitError.read()
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# sys.exit(1)
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if not silent:
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print ""
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gitStream.write("reset refs/tags/p4/%s\n" % lastChange)
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gitStream.write("from %s\n\n" % branch);
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gitStream.close()
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gitOutput.close()
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gitError.close()
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os.popen("git-repo-config p4.depotpath %s" % globalPrefix).read()
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if len(initialTag) > 0:
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os.popen("git tag -d %s" % initialTag).read()
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sys.exit(0)
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