Merge branch 'pw/p4-use-client-spec-branch-detection'
[gitweb.git] / git-p4.py
index eab69590c4162f3e4a51c97819f2089a30247ec5..aed1a2de3295bcd57a8c8c602cbdd28a6a6f2f7f 100755 (executable)
--- a/git-p4.py
+++ b/git-p4.py
@@ -120,6 +120,15 @@ def p4_read_pipe_lines(c):
     real_cmd = p4_build_cmd(c)
     return read_pipe_lines(real_cmd)
 
+def p4_has_command(cmd):
+    """Ask p4 for help on this command.  If it returns an error, the
+       command does not exist in this version of p4."""
+    real_cmd = p4_build_cmd(["help", cmd])
+    p = subprocess.Popen(real_cmd, stdout=subprocess.PIPE,
+                                   stderr=subprocess.PIPE)
+    p.communicate()
+    return p.returncode == 0
+
 def system(cmd):
     expand = isinstance(cmd,basestring)
     if verbose:
@@ -133,25 +142,32 @@ def p4_system(cmd):
     subprocess.check_call(real_cmd, shell=expand)
 
 def p4_integrate(src, dest):
-    p4_system(["integrate", "-Dt", src, dest])
+    p4_system(["integrate", "-Dt", wildcard_encode(src), wildcard_encode(dest)])
 
-def p4_sync(path):
-    p4_system(["sync", path])
+def p4_sync(f, *options):
+    p4_system(["sync"] + list(options) + [wildcard_encode(f)])
 
 def p4_add(f):
-    p4_system(["add", f])
+    # forcibly add file names with wildcards
+    if wildcard_present(f):
+        p4_system(["add", "-f", f])
+    else:
+        p4_system(["add", f])
 
 def p4_delete(f):
-    p4_system(["delete", f])
+    p4_system(["delete", wildcard_encode(f)])
 
 def p4_edit(f):
-    p4_system(["edit", f])
+    p4_system(["edit", wildcard_encode(f)])
 
 def p4_revert(f):
-    p4_system(["revert", f])
+    p4_system(["revert", wildcard_encode(f)])
+
+def p4_reopen(type, f):
+    p4_system(["reopen", "-t", type, wildcard_encode(f)])
 
-def p4_reopen(type, file):
-    p4_system(["reopen", "-t", type, file])
+def p4_move(src, dest):
+    p4_system(["move", "-k", wildcard_encode(src), wildcard_encode(dest)])
 
 #
 # Canonicalize the p4 type and return a tuple of the
@@ -248,7 +264,7 @@ def setP4ExecBit(file, mode):
 def getP4OpenedType(file):
     # Returns the perforce file type for the given file.
 
-    result = p4_read_pipe(["opened", file])
+    result = p4_read_pipe(["opened", wildcard_encode(file)])
     match = re.match(".*\((.+)\)\r?$", result)
     if match:
         return match.group(1)
@@ -658,6 +674,34 @@ def getClientRoot():
 
     return entry["Root"]
 
+#
+# P4 wildcards are not allowed in filenames.  P4 complains
+# if you simply add them, but you can force it with "-f", in
+# which case it translates them into %xx encoding internally.
+#
+def wildcard_decode(path):
+    # Search for and fix just these four characters.  Do % last so
+    # that fixing it does not inadvertently create new %-escapes.
+    # Cannot have * in a filename in windows; untested as to
+    # what p4 would do in such a case.
+    if not platform.system() == "Windows":
+        path = path.replace("%2A", "*")
+    path = path.replace("%23", "#") \
+               .replace("%40", "@") \
+               .replace("%25", "%")
+    return path
+
+def wildcard_encode(path):
+    # do % first to avoid double-encoding the %s introduced here
+    path = path.replace("%", "%25") \
+               .replace("*", "%2A") \
+               .replace("#", "%23") \
+               .replace("@", "%40")
+    return path
+
+def wildcard_present(path):
+    return path.translate(None, "*#@%") != path
+
 class Command:
     def __init__(self):
         self.usage = "usage: %prog [options]"
@@ -812,20 +856,45 @@ def __init__(self):
         ]
         self.description = "Submit changes from git to the perforce depot."
         self.usage += " [name of git branch to submit into perforce depot]"
-        self.interactive = True
         self.origin = ""
         self.detectRenames = False
         self.preserveUser = gitConfig("git-p4.preserveUser").lower() == "true"
         self.isWindows = (platform.system() == "Windows")
         self.exportLabels = False
+        self.p4HasMoveCommand = p4_has_command("move")
 
     def check(self):
         if len(p4CmdList("opened ...")) > 0:
             die("You have files opened with perforce! Close them before starting the sync.")
 
-    # replaces everything between 'Description:' and the next P4 submit template field with the
-    # commit message
-    def prepareLogMessage(self, template, message):
+    def separate_jobs_from_description(self, message):
+        """Extract and return a possible Jobs field in the commit
+           message.  It goes into a separate section in the p4 change
+           specification.
+
+           A jobs line starts with "Jobs:" and looks like a new field
+           in a form.  Values are white-space separated on the same
+           line or on following lines that start with a tab.
+
+           This does not parse and extract the full git commit message
+           like a p4 form.  It just sees the Jobs: line as a marker
+           to pass everything from then on directly into the p4 form,
+           but outside the description section.
+
+           Return a tuple (stripped log message, jobs string)."""
+
+        m = re.search(r'^Jobs:', message, re.MULTILINE)
+        if m is None:
+            return (message, None)
+
+        jobtext = message[m.start():]
+        stripped_message = message[:m.start()].rstrip()
+        return (stripped_message, jobtext)
+
+    def prepareLogMessage(self, template, message, jobs):
+        """Edits the template returned from "p4 change -o" to insert
+           the message in the Description field, and the jobs text in
+           the Jobs field."""
         result = ""
 
         inDescriptionSection = False
@@ -838,6 +907,9 @@ def prepareLogMessage(self, template, message):
             if inDescriptionSection:
                 if line.startswith("Files:") or line.startswith("Jobs:"):
                     inDescriptionSection = False
+                    # insert Jobs section
+                    if jobs:
+                        result += jobs + "\n"
                 else:
                     continue
             else:
@@ -949,7 +1021,13 @@ def canChangeChangelists(self):
         return 0
 
     def prepareSubmitTemplate(self):
-        # remove lines in the Files section that show changes to files outside the depot path we're committing into
+        """Run "p4 change -o" to grab a change specification template.
+           This does not use "p4 -G", as it is nice to keep the submission
+           template in original order, since a human might edit it.
+
+           Remove lines in the Files section that show changes to files
+           outside the depot path we're committing into."""
+
         template = ""
         inFilesSection = False
         for line in p4_read_pipe_lines(['change', '-o']):
@@ -1014,30 +1092,11 @@ def applyCommit(self, id):
 
         (p4User, gitEmail) = self.p4UserForCommit(id)
 
-        if not self.detectRenames:
-            # If not explicitly set check the config variable
-            self.detectRenames = gitConfig("git-p4.detectRenames")
-
-        if self.detectRenames.lower() == "false" or self.detectRenames == "":
-            diffOpts = ""
-        elif self.detectRenames.lower() == "true":
-            diffOpts = "-M"
-        else:
-            diffOpts = "-M%s" % self.detectRenames
-
-        detectCopies = gitConfig("git-p4.detectCopies")
-        if detectCopies.lower() == "true":
-            diffOpts += " -C"
-        elif detectCopies != "" and detectCopies.lower() != "false":
-            diffOpts += " -C%s" % detectCopies
-
-        if gitConfig("git-p4.detectCopiesHarder", "--bool") == "true":
-            diffOpts += " --find-copies-harder"
-
-        diff = read_pipe_lines("git diff-tree -r %s \"%s^\" \"%s\"" % (diffOpts, id, id))
+        diff = read_pipe_lines("git diff-tree -r %s \"%s^\" \"%s\"" % (self.diffOpts, id, id))
         filesToAdd = set()
         filesToDelete = set()
         editedFiles = set()
+        pureRenameCopy = set()
         filesToChangeExecBit = {}
 
         for line in diff:
@@ -1061,24 +1120,35 @@ def applyCommit(self, id):
             elif modifier == "C":
                 src, dest = diff['src'], diff['dst']
                 p4_integrate(src, dest)
+                pureRenameCopy.add(dest)
                 if diff['src_sha1'] != diff['dst_sha1']:
                     p4_edit(dest)
+                    pureRenameCopy.discard(dest)
                 if isModeExecChanged(diff['src_mode'], diff['dst_mode']):
                     p4_edit(dest)
+                    pureRenameCopy.discard(dest)
                     filesToChangeExecBit[dest] = diff['dst_mode']
                 os.unlink(dest)
                 editedFiles.add(dest)
             elif modifier == "R":
                 src, dest = diff['src'], diff['dst']
-                p4_integrate(src, dest)
-                if diff['src_sha1'] != diff['dst_sha1']:
-                    p4_edit(dest)
+                if self.p4HasMoveCommand:
+                    p4_edit(src)        # src must be open before move
+                    p4_move(src, dest)  # opens for (move/delete, move/add)
+                else:
+                    p4_integrate(src, dest)
+                    if diff['src_sha1'] != diff['dst_sha1']:
+                        p4_edit(dest)
+                    else:
+                        pureRenameCopy.add(dest)
                 if isModeExecChanged(diff['src_mode'], diff['dst_mode']):
-                    p4_edit(dest)
+                    if not self.p4HasMoveCommand:
+                        p4_edit(dest)   # with move: already open, writable
                     filesToChangeExecBit[dest] = diff['dst_mode']
-                os.unlink(dest)
+                if not self.p4HasMoveCommand:
+                    os.unlink(dest)
+                    filesToDelete.add(src)
                 editedFiles.add(dest)
-                filesToDelete.add(src)
             else:
                 die("unknown modifier %s for %s" % (modifier, path))
 
@@ -1168,82 +1238,80 @@ def applyCommit(self, id):
 
         logMessage = extractLogMessageFromGitCommit(id)
         logMessage = logMessage.strip()
+        (logMessage, jobs) = self.separate_jobs_from_description(logMessage)
 
         template = self.prepareSubmitTemplate()
+        submitTemplate = self.prepareLogMessage(template, logMessage, jobs)
 
-        if self.interactive:
-            submitTemplate = self.prepareLogMessage(template, logMessage)
-
-            if self.preserveUser:
-               submitTemplate = submitTemplate + ("\n######## Actual user %s, modified after commit\n" % p4User)
-
-            if os.environ.has_key("P4DIFF"):
-                del(os.environ["P4DIFF"])
-            diff = ""
-            for editedFile in editedFiles:
-                diff += p4_read_pipe(['diff', '-du', editedFile])
-
-            newdiff = ""
-            for newFile in filesToAdd:
-                newdiff += "==== new file ====\n"
-                newdiff += "--- /dev/null\n"
-                newdiff += "+++ %s\n" % newFile
-                f = open(newFile, "r")
-                for line in f.readlines():
-                    newdiff += "+" + line
-                f.close()
-
-            if self.checkAuthorship and not self.p4UserIsMe(p4User):
-                submitTemplate += "######## git author %s does not match your p4 account.\n" % gitEmail
-                submitTemplate += "######## Use option --preserve-user to modify authorship.\n"
-                submitTemplate += "######## Variable git-p4.skipUserNameCheck hides this message.\n"
-
-            separatorLine = "######## everything below this line is just the diff #######\n"
-
-            (handle, fileName) = tempfile.mkstemp()
-            tmpFile = os.fdopen(handle, "w+")
-            if self.isWindows:
-                submitTemplate = submitTemplate.replace("\n", "\r\n")
-                separatorLine = separatorLine.replace("\n", "\r\n")
-                newdiff = newdiff.replace("\n", "\r\n")
-            tmpFile.write(submitTemplate + separatorLine + diff + newdiff)
+        if self.preserveUser:
+           submitTemplate = submitTemplate + ("\n######## Actual user %s, modified after commit\n" % p4User)
+
+        if os.environ.has_key("P4DIFF"):
+            del(os.environ["P4DIFF"])
+        diff = ""
+        for editedFile in editedFiles:
+            diff += p4_read_pipe(['diff', '-du',
+                                  wildcard_encode(editedFile)])
+
+        newdiff = ""
+        for newFile in filesToAdd:
+            newdiff += "==== new file ====\n"
+            newdiff += "--- /dev/null\n"
+            newdiff += "+++ %s\n" % newFile
+            f = open(newFile, "r")
+            for line in f.readlines():
+                newdiff += "+" + line
+            f.close()
+
+        if self.checkAuthorship and not self.p4UserIsMe(p4User):
+            submitTemplate += "######## git author %s does not match your p4 account.\n" % gitEmail
+            submitTemplate += "######## Use option --preserve-user to modify authorship.\n"
+            submitTemplate += "######## Variable git-p4.skipUserNameCheck hides this message.\n"
+
+        separatorLine = "######## everything below this line is just the diff #######\n"
+
+        (handle, fileName) = tempfile.mkstemp()
+        tmpFile = os.fdopen(handle, "w+")
+        if self.isWindows:
+            submitTemplate = submitTemplate.replace("\n", "\r\n")
+            separatorLine = separatorLine.replace("\n", "\r\n")
+            newdiff = newdiff.replace("\n", "\r\n")
+        tmpFile.write(submitTemplate + separatorLine + diff + newdiff)
+        tmpFile.close()
+
+        if self.edit_template(fileName):
+            # read the edited message and submit
+            tmpFile = open(fileName, "rb")
+            message = tmpFile.read()
             tmpFile.close()
+            submitTemplate = message[:message.index(separatorLine)]
+            if self.isWindows:
+                submitTemplate = submitTemplate.replace("\r\n", "\n")
+            p4_write_pipe(['submit', '-i'], submitTemplate)
 
-            if self.edit_template(fileName):
-                # read the edited message and submit
-                tmpFile = open(fileName, "rb")
-                message = tmpFile.read()
-                tmpFile.close()
-                submitTemplate = message[:message.index(separatorLine)]
-                if self.isWindows:
-                    submitTemplate = submitTemplate.replace("\r\n", "\n")
-                p4_write_pipe(['submit', '-i'], submitTemplate)
-
-                if self.preserveUser:
-                    if p4User:
-                        # Get last changelist number. Cannot easily get it from
-                        # the submit command output as the output is
-                        # unmarshalled.
-                        changelist = self.lastP4Changelist()
-                        self.modifyChangelistUser(changelist, p4User)
-            else:
-                # skip this patch
-                print "Submission cancelled, undoing p4 changes."
-                for f in editedFiles:
-                    p4_revert(f)
-                for f in filesToAdd:
-                    p4_revert(f)
-                    os.remove(f)
+            if self.preserveUser:
+                if p4User:
+                    # Get last changelist number. Cannot easily get it from
+                    # the submit command output as the output is
+                    # unmarshalled.
+                    changelist = self.lastP4Changelist()
+                    self.modifyChangelistUser(changelist, p4User)
+
+            # The rename/copy happened by applying a patch that created a
+            # new file.  This leaves it writable, which confuses p4.
+            for f in pureRenameCopy:
+                p4_sync(f, "-f")
 
-            os.remove(fileName)
         else:
-            fileName = "submit.txt"
-            file = open(fileName, "w+")
-            file.write(self.prepareLogMessage(template, logMessage))
-            file.close()
-            print ("Perforce submit template written as %s. "
-                   + "Please review/edit and then use p4 submit -i < %s to submit directly!"
-                   % (fileName, fileName))
+            # skip this patch
+            print "Submission cancelled, undoing p4 changes."
+            for f in editedFiles:
+                p4_revert(f)
+            for f in filesToAdd:
+                p4_revert(f)
+                os.remove(f)
+
+        os.remove(fileName)
 
     # Export git tags as p4 labels. Create a p4 label and then tag
     # with that.
@@ -1257,7 +1325,7 @@ def exportGitTags(self, gitTags):
 
             if not m.match(name):
                 if verbose:
-                    print "tag %s does not match regexp %s" % (name, validTagRegexp)
+                    print "tag %s does not match regexp %s" % (name, validLabelRegexp)
                 continue
 
             # Get the p4 commit this corresponds to
@@ -1361,12 +1429,18 @@ def run(self, args):
         self.oldWorkingDirectory = os.getcwd()
 
         # ensure the clientPath exists
+        new_client_dir = False
         if not os.path.exists(self.clientPath):
+            new_client_dir = True
             os.makedirs(self.clientPath)
 
         chdir(self.clientPath)
         print "Synchronizing p4 checkout..."
-        p4_sync("...")
+        if new_client_dir:
+            # old one was destroyed, and maybe nobody told p4
+            p4_sync("...", "-f")
+        else:
+            p4_sync("...")
         self.check()
 
         commits = []
@@ -1382,12 +1456,41 @@ def run(self, args):
         if self.preserveUser:
             self.checkValidP4Users(commits)
 
+        #
+        # Build up a set of options to be passed to diff when
+        # submitting each commit to p4.
+        #
+        if self.detectRenames:
+            # command-line -M arg
+            self.diffOpts = "-M"
+        else:
+            # If not explicitly set check the config variable
+            detectRenames = gitConfig("git-p4.detectRenames")
+
+            if detectRenames.lower() == "false" or detectRenames == "":
+                self.diffOpts = ""
+            elif detectRenames.lower() == "true":
+                self.diffOpts = "-M"
+            else:
+                self.diffOpts = "-M%s" % detectRenames
+
+        # no command-line arg for -C or --find-copies-harder, just
+        # config variables
+        detectCopies = gitConfig("git-p4.detectCopies")
+        if detectCopies.lower() == "false" or detectCopies == "":
+            pass
+        elif detectCopies.lower() == "true":
+            self.diffOpts += " -C"
+        else:
+            self.diffOpts += " -C%s" % detectCopies
+
+        if gitConfig("git-p4.detectCopiesHarder", "--bool") == "true":
+            self.diffOpts += " --find-copies-harder"
+
         while len(commits) > 0:
             commit = commits[0]
             commits = commits[1:]
             self.applyCommit(commit)
-            if not self.interactive:
-                break
 
         if len(commits) == 0:
             print "All changes applied!"
@@ -1400,7 +1503,7 @@ def run(self, args):
             rebase.rebase()
 
         if gitConfig("git-p4.exportLabels", "--bool") == "true":
-            self.exportLabels = true
+            self.exportLabels = True
 
         if self.exportLabels:
             p4Labels = getP4Labels(self.depotPath)
@@ -1679,23 +1782,6 @@ def __init__(self):
         if gitConfig("git-p4.syncFromOrigin") == "false":
             self.syncWithOrigin = False
 
-    #
-    # P4 wildcards are not allowed in filenames.  P4 complains
-    # if you simply add them, but you can force it with "-f", in
-    # which case it translates them into %xx encoding internally.
-    # Search for and fix just these four characters.  Do % last so
-    # that fixing it does not inadvertently create new %-escapes.
-    #
-    def wildcard_decode(self, path):
-        # Cannot have * in a filename in windows; untested as to
-        # what p4 would do in such a case.
-        if not self.isWindows:
-            path = path.replace("%2A", "*")
-        path = path.replace("%23", "#") \
-                   .replace("%40", "@") \
-                   .replace("%25", "%")
-        return path
-
     # Force a checkpoint in fast-import and wait for it to finish
     def checkpoint(self):
         self.gitStream.write("checkpoint\n\n")
@@ -1732,19 +1818,41 @@ def extractFilesFromCommit(self, commit):
         return files
 
     def stripRepoPath(self, path, prefixes):
-        if self.useClientSpec:
-            return self.clientSpecDirs.map_in_client(path)
+        """When streaming files, this is called to map a p4 depot path
+           to where it should go in git.  The prefixes are either
+           self.depotPaths, or self.branchPrefixes in the case of
+           branch detection."""
 
-        if self.keepRepoPath:
-            prefixes = [re.sub("^(//[^/]+/).*", r'\1', prefixes[0])]
+        if self.useClientSpec:
+            # branch detection moves files up a level (the branch name)
+            # from what client spec interpretation gives
+            path = self.clientSpecDirs.map_in_client(path)
+            if self.detectBranches:
+                for b in self.knownBranches:
+                    if path.startswith(b + "/"):
+                        path = path[len(b)+1:]
+
+        elif self.keepRepoPath:
+            # Preserve everything in relative path name except leading
+            # //depot/; just look at first prefix as they all should
+            # be in the same depot.
+            depot = re.sub("^(//[^/]+/).*", r'\1', prefixes[0])
+            if p4PathStartsWith(path, depot):
+                path = path[len(depot):]
 
-        for p in prefixes:
-            if p4PathStartsWith(path, p):
-                path = path[len(p):]
+        else:
+            for p in prefixes:
+                if p4PathStartsWith(path, p):
+                    path = path[len(p):]
+                    break
 
+        path = wildcard_decode(path)
         return path
 
     def splitFilesIntoBranches(self, commit):
+        """Look at each depotFile in the commit to figure out to what
+           branch it belongs."""
+
         branches = {}
         fnum = 0
         while commit.has_key("depotFile%s" % fnum):
@@ -1762,11 +1870,16 @@ def splitFilesIntoBranches(self, commit):
             file["type"] = commit["type%s" % fnum]
             fnum = fnum + 1
 
-            relPath = self.stripRepoPath(path, self.depotPaths)
+            # start with the full relative path where this file would
+            # go in a p4 client
+            if self.useClientSpec:
+                relPath = self.clientSpecDirs.map_in_client(path)
+            else:
+                relPath = self.stripRepoPath(path, self.depotPaths)
 
             for branch in self.knownBranches.keys():
-
-                # add a trailing slash so that a commit into qt/4.2foo doesn't end up in qt/4.2
+                # add a trailing slash so that a commit into qt/4.2foo
+                # doesn't end up in qt/4.2, e.g.
                 if relPath.startswith(branch + "/"):
                     if branch not in branches:
                         branches[branch] = []
@@ -1780,7 +1893,6 @@ def splitFilesIntoBranches(self, commit):
 
     def streamOneP4File(self, file, contents):
         relPath = self.stripRepoPath(file['depotFile'], self.branchPrefixes)
-        relPath = self.wildcard_decode(relPath)
         if verbose:
             sys.stderr.write("%s\n" % relPath)
 
@@ -1953,10 +2065,9 @@ def streamTag(self, gitStream, labelName, labelDetails, commit, epoch):
         gitStream.write(description)
         gitStream.write("\n")
 
-    def commit(self, details, files, branch, branchPrefixes, parent = ""):
+    def commit(self, details, files, branch, parent = ""):
         epoch = details["time"]
         author = details["user"]
-        self.branchPrefixes = branchPrefixes
 
         if self.verbose:
             print "commit into %s" % branch
@@ -1965,7 +2076,7 @@ def commit(self, details, files, branch, branchPrefixes, parent = ""):
         # create a commit.
         new_files = []
         for f in files:
-            if [p for p in branchPrefixes if p4PathStartsWith(f['path'], p)]:
+            if [p for p in self.branchPrefixes if p4PathStartsWith(f['path'], p)]:
                 new_files.append (f)
             else:
                 sys.stderr.write("Ignoring file outside of prefix: %s\n" % f['path'])
@@ -1982,8 +2093,8 @@ def commit(self, details, files, branch, branchPrefixes, parent = ""):
 
         self.gitStream.write("data <<EOT\n")
         self.gitStream.write(details["desc"])
-        self.gitStream.write("\n[git-p4: depot-paths = \"%s\": change = %s"
-                             % (','.join (branchPrefixes), details["change"]))
+        self.gitStream.write("\n[git-p4: depot-paths = \"%s\": change = %s" %
+                             (','.join(self.branchPrefixes), details["change"]))
         if len(details['options']) > 0:
             self.gitStream.write(": options = %s" % details['options'])
         self.gitStream.write("]\nEOT\n\n")
@@ -2006,7 +2117,7 @@ def commit(self, details, files, branch, branchPrefixes, parent = ""):
                 print "Change %s is labelled %s" % (change, labelDetails)
 
             files = p4CmdList(["files"] + ["%s...@%s" % (p, change)
-                                                    for p in branchPrefixes])
+                                                for p in self.branchPrefixes])
 
             if len(files) == len(labelRevisions):
 
@@ -2317,6 +2428,7 @@ def importChanges(self, changes):
                     for branch in branches.keys():
                         ## HACK  --hwn
                         branchPrefix = self.depotPaths[0] + branch + "/"
+                        self.branchPrefixes = [ branchPrefix ]
 
                         parent = ""
 
@@ -2361,19 +2473,19 @@ def importChanges(self, changes):
                             tempBranch = os.path.join(self.tempBranchLocation, "%d" % (change))
                             if self.verbose:
                                 print "Creating temporary branch: " + tempBranch
-                            self.commit(description, filesForCommit, tempBranch, [branchPrefix])
+                            self.commit(description, filesForCommit, tempBranch)
                             self.tempBranches.append(tempBranch)
                             self.checkpoint()
                             blob = self.searchParent(parent, branch, tempBranch)
                         if blob:
-                            self.commit(description, filesForCommit, branch, [branchPrefix], blob)
+                            self.commit(description, filesForCommit, branch, blob)
                         else:
                             if self.verbose:
                                 print "Parent of %s not found. Committing into head of %s" % (branch, parent)
-                            self.commit(description, filesForCommit, branch, [branchPrefix], parent)
+                            self.commit(description, filesForCommit, branch, parent)
                 else:
                     files = self.extractFilesFromCommit(description)
-                    self.commit(description, files, self.branch, self.depotPaths,
+                    self.commit(description, files, self.branch,
                                 self.initialParent)
                     self.initialParent = ""
             except IOError:
@@ -2437,7 +2549,7 @@ def importHeadRevision(self, revision):
 
         self.updateOptionDict(details)
         try:
-            self.commit(details, self.extractFilesFromCommit(details), self.branch, self.depotPaths)
+            self.commit(details, self.extractFilesFromCommit(details), self.branch)
         except IOError:
             print "IO error with git fast-import. Is your git version recent enough?"
             print self.gitError.read()
@@ -2595,6 +2707,9 @@ def run(self, args):
 
         self.depotPaths = newPaths
 
+        # --detect-branches may change this for each branch
+        self.branchPrefixes = self.depotPaths
+
         self.loadUserMapFromCache()
         self.labels = {}
         if self.detectLabels:
@@ -2675,7 +2790,7 @@ def run(self, args):
                         sys.stdout.write("\n")
 
         if gitConfig("git-p4.importLabels", "--bool") == "true":
-            self.importLabels = true
+            self.importLabels = True
 
         if self.importLabels:
             p4Labels = getP4Labels(self.depotPaths)