git-p4: work with a detached head
[gitweb.git] / git-p4.py
index 26ad4bcf77e36624e4261ae2dfd93ba637914b9d..0cfc8668d67e6aa8358e0db537d5eaf9b6e5c049 100755 (executable)
--- a/git-p4.py
+++ b/git-p4.py
@@ -43,6 +43,9 @@ def __str__(self):
 # Only labels/tags matching this will be imported/exported
 defaultLabelRegexp = r'[a-zA-Z0-9_\-.]+$'
 
+# Grab changes in blocks of this many revisions, unless otherwise requested
+defaultBlockSize = 512
+
 def p4_build_cmd(cmd):
     """Build a suitable p4 command line.
 
@@ -189,14 +192,16 @@ def p4_has_move_command():
     # assume it failed because @... was invalid changelist
     return True
 
-def system(cmd):
+def system(cmd, ignore_error=False):
     expand = isinstance(cmd,basestring)
     if verbose:
         sys.stderr.write("executing %s\n" % str(cmd))
     retcode = subprocess.call(cmd, shell=expand)
-    if retcode:
+    if retcode and not ignore_error:
         raise CalledProcessError(retcode, cmd)
 
+    return retcode
+
 def p4_system(cmd):
     """Specifically invoke p4 as the system command. """
     real_cmd = p4_build_cmd(cmd)
@@ -249,6 +254,10 @@ def p4_reopen(type, f):
 def p4_move(src, dest):
     p4_system(["move", "-k", wildcard_encode(src), wildcard_encode(dest)])
 
+def p4_last_change():
+    results = p4CmdList(["changes", "-m", "1"])
+    return int(results[0]['change'])
+
 def p4_describe(change):
     """Make sure it returns a valid result by checking for
        the presence of field "time".  Return a dict of the
@@ -535,7 +544,12 @@ def p4Where(depotPath):
     return clientPath
 
 def currentGitBranch():
-    return read_pipe("git name-rev HEAD").split(" ")[1].strip()
+    retcode = system(["git", "symbolic-ref", "-q", "HEAD"], ignore_error=True)
+    if retcode != 0:
+        # on a detached head
+        return None
+    else:
+        return read_pipe(["git", "name-rev", "HEAD"]).split(" ")[1].strip()
 
 def isValidGitDir(path):
     if (os.path.exists(path + "/HEAD")
@@ -742,43 +756,77 @@ def createOrUpdateBranchesFromOrigin(localRefPrefix = "refs/remotes/p4/", silent
 def originP4BranchesExist():
         return gitBranchExists("origin") or gitBranchExists("origin/p4") or gitBranchExists("origin/p4/master")
 
-def p4ChangesForPaths(depotPaths, changeRange, block_size):
+
+def p4ParseNumericChangeRange(parts):
+    changeStart = int(parts[0][1:])
+    if parts[1] == '#head':
+        changeEnd = p4_last_change()
+    else:
+        changeEnd = int(parts[1])
+
+    return (changeStart, changeEnd)
+
+def chooseBlockSize(blockSize):
+    if blockSize:
+        return blockSize
+    else:
+        return defaultBlockSize
+
+def p4ChangesForPaths(depotPaths, changeRange, requestedBlockSize):
     assert depotPaths
-    assert block_size
 
-    # Parse the change range into start and end
+    # Parse the change range into start and end. Try to find integer
+    # revision ranges as these can be broken up into blocks to avoid
+    # hitting server-side limits (maxrows, maxscanresults). But if
+    # that doesn't work, fall back to using the raw revision specifier
+    # strings, without using block mode.
+
     if changeRange is None or changeRange == '':
-        changeStart = '@1'
-        changeEnd = '#head'
+        changeStart = 1
+        changeEnd = p4_last_change()
+        block_size = chooseBlockSize(requestedBlockSize)
     else:
         parts = changeRange.split(',')
         assert len(parts) == 2
-        changeStart = parts[0]
-        changeEnd = parts[1]
+        try:
+            (changeStart, changeEnd) = p4ParseNumericChangeRange(parts)
+            block_size = chooseBlockSize(requestedBlockSize)
+        except:
+            changeStart = parts[0][1:]
+            changeEnd = parts[1]
+            if requestedBlockSize:
+                die("cannot use --changes-block-size with non-numeric revisions")
+            block_size = None
 
     # Accumulate change numbers in a dictionary to avoid duplicates
     changes = {}
 
     for p in depotPaths:
         # Retrieve changes a block at a time, to prevent running
-        # into a MaxScanRows error from the server.
-        start = changeStart
-        end = changeEnd
-        get_another_block = True
-        while get_another_block:
-            new_changes = []
+        # into a MaxResults/MaxScanRows error from the server.
+
+        while True:
             cmd = ['changes']
-            cmd += ['-m', str(block_size)]
-            cmd += ["%s...%s,%s" % (p, start, end)]
+
+            if block_size:
+                end = min(changeEnd, changeStart + block_size)
+                revisionRange = "%d,%d" % (changeStart, end)
+            else:
+                revisionRange = "%s,%s" % (changeStart, changeEnd)
+
+            cmd += ["%s...@%s" % (p, revisionRange)]
+
             for line in p4_read_pipe_lines(cmd):
                 changeNum = int(line.split(" ")[1])
-                new_changes.append(changeNum)
                 changes[changeNum] = True
-            if len(new_changes) == block_size:
-                get_another_block = True
-                end = '@' + str(min(new_changes))
-            else:
-                get_another_block = False
+
+            if not block_size:
+                break
+
+            if end >= changeEnd:
+                break
+
+            changeStart = end + 1
 
     changelist = changes.keys()
     changelist.sort()
@@ -1610,8 +1658,6 @@ def exportGitTags(self, gitTags):
     def run(self, args):
         if len(args) == 0:
             self.master = currentGitBranch()
-            if len(self.master) == 0 or not gitBranchExists("refs/heads/%s" % self.master):
-                die("Detecting current git branch failed!")
         elif len(args) == 1:
             self.master = args[0]
             if not branchExists(self.master):
@@ -1619,9 +1665,10 @@ def run(self, args):
         else:
             return False
 
-        allowSubmit = gitConfig("git-p4.allowSubmit")
-        if len(allowSubmit) > 0 and not self.master in allowSubmit.split(","):
-            die("%s is not in git-p4.allowSubmit" % self.master)
+        if self.master:
+            allowSubmit = gitConfig("git-p4.allowSubmit")
+            if len(allowSubmit) > 0 and not self.master in allowSubmit.split(","):
+                die("%s is not in git-p4.allowSubmit" % self.master)
 
         [upstream, settings] = findUpstreamBranchPoint()
         self.depotPath = settings['depot-paths'][0]
@@ -1689,7 +1736,12 @@ def run(self, args):
         self.check()
 
         commits = []
-        for line in read_pipe_lines(["git", "rev-list", "--no-merges", "%s..%s" % (self.origin, self.master)]):
+        if self.master:
+            commitish = self.master
+        else:
+            commitish = 'HEAD'
+
+        for line in read_pipe_lines(["git", "rev-list", "--no-merges", "%s..%s" % (self.origin, commitish)]):
             commits.append(line.strip())
         commits.reverse()
 
@@ -1909,10 +1961,14 @@ def update_client_spec_path_cache(self, files):
             if "unmap" in res:
                 # it will list all of them, but only one not unmap-ped
                 continue
+            if gitConfigBool("core.ignorecase"):
+                res['depotFile'] = res['depotFile'].lower()
             self.client_spec_path_cache[res['depotFile']] = self.convert_client_path(res["clientFile"])
 
         # not found files or unmap files set to ""
         for depotFile in fileArgs:
+            if gitConfigBool("core.ignorecase"):
+                depotFile = depotFile.lower()
             if depotFile not in self.client_spec_path_cache:
                 self.client_spec_path_cache[depotFile] = ""
 
@@ -1921,6 +1977,9 @@ def map_in_client(self, depot_path):
            depot file should live.  Returns "" if the file should
            not be mapped in the client."""
 
+        if gitConfigBool("core.ignorecase"):
+            depot_path = depot_path.lower()
+
         if depot_path in self.client_spec_path_cache:
             return self.client_spec_path_cache[depot_path]
 
@@ -1974,7 +2033,7 @@ def __init__(self):
         self.syncWithOrigin = True
         self.importIntoRemotes = True
         self.maxChanges = ""
-        self.changes_block_size = 500
+        self.changes_block_size = None
         self.keepRepoPath = False
         self.depotPaths = None
         self.p4BranchesInGit = []