git-p4: update multiple shelved change lists

--update-shelve can now be specified multiple times on the
command-line, to update multiple shelved changelists in a single
submit.

This then means that a git patch series can be mirrored to a
sequence of shelved changelists, and (relatively easily) kept in
sync as changes are made in git.

Note that Perforce does not really support overlapping shelved
changelists where one change touches the files modified by
another. Trying to do this will result in merge conflicts.

Signed-off-by: Luke Diamand <luke@diamand.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 26 insertions, 15 deletions

diff --git a/git-p4.py b/git-p4.py
index 76859b453a..7bb9cadc69 100755
--- a/git-p4.py
+++ b/git-p4.py
@@ -1178,6 +1178,12 @@ class Command:
         self.needsGit = True
         self.verbose = False
 
+    # This is required for the "append" cloneExclude action
+    def ensure_value(self, attr, value):
+        if not hasattr(self, attr) or getattr(self, attr) is None:
+            setattr(self, attr, value)
+        return getattr(self, attr)
+
 class P4UserMap:
     def __init__(self):
         self.userMapFromPerforceServer = False
@@ -1343,9 +1349,10 @@ class P4Submit(Command, P4UserMap):
                 optparse.make_option("--shelve", dest="shelve", action="store_true",
                                      help="Shelve instead of submit. Shelved files are reverted, "
                                      "restoring the workspace to the state before the shelve"),
-                optparse.make_option("--update-shelve", dest="update_shelve", action="store", type="int",
+                optparse.make_option("--update-shelve", dest="update_shelve", action="append", type="int",
                                      metavar="CHANGELIST",
-                                     help="update an existing shelved changelist, implies --shelve")
+                                     help="update an existing shelved changelist, implies --shelve, "
+                                           "repeat in-order for multiple shelved changelists")
         ]
         self.description = "Submit changes from git to the perforce depot."
         self.usage += " [name of git branch to submit into perforce depot]"
@@ -1354,7 +1361,7 @@ class P4Submit(Command, P4UserMap):
         self.preserveUser = gitConfigBool("git-p4.preserveUser")
         self.dry_run = False
         self.shelve = False
-        self.update_shelve = None
+        self.update_shelve = list()
         self.prepare_p4_only = False
         self.conflict_behavior = None
         self.isWindows = (platform.system() == "Windows")
@@ -1809,9 +1816,10 @@ class P4Submit(Command, P4UserMap):
             mode = filesToChangeExecBit[f]
             setP4ExecBit(f, mode)
 
-        if self.update_shelve:
-            print("all_files = %s" % str(all_files))
-            p4_reopen_in_change(self.update_shelve, all_files)
+        update_shelve = 0
+        if len(self.update_shelve) > 0:
+            update_shelve = self.update_shelve.pop(0)
+            p4_reopen_in_change(update_shelve, all_files)
 
         #
         # Build p4 change description, starting with the contents
@@ -1821,7 +1829,7 @@ class P4Submit(Command, P4UserMap):
         logMessage = logMessage.strip()
         (logMessage, jobs) = self.separate_jobs_from_description(logMessage)
 
-        template = self.prepareSubmitTemplate(self.update_shelve)
+        template = self.prepareSubmitTemplate(update_shelve)
         submitTemplate = self.prepareLogMessage(template, logMessage, jobs)
 
         if self.preserveUser:
@@ -1894,7 +1902,7 @@ class P4Submit(Command, P4UserMap):
                     message = message.replace("\r\n", "\n")
                 submitTemplate = message[:message.index(separatorLine)]
 
-                if self.update_shelve:
+                if update_shelve:
                     p4_write_pipe(['shelve', '-r', '-i'], submitTemplate)
                 elif self.shelve:
                     p4_write_pipe(['shelve', '-i'], submitTemplate)
@@ -2012,6 +2020,10 @@ class P4Submit(Command, P4UserMap):
         else:
             return False
 
+        for i in self.update_shelve:
+            if i <= 0:
+                sys.exit("invalid changelist %d" % i)
+
         if self.master:
             allowSubmit = gitConfig("git-p4.allowSubmit")
             if len(allowSubmit) > 0 and not self.master in allowSubmit.split(","):
@@ -2022,7 +2034,7 @@ class P4Submit(Command, P4UserMap):
         if len(self.origin) == 0:
             self.origin = upstream
 
-        if self.update_shelve:
+        if len(self.update_shelve) > 0:
             self.shelve = True
 
         if self.preserveUser:
@@ -2134,6 +2146,11 @@ class P4Submit(Command, P4UserMap):
         if gitConfigBool("git-p4.detectCopiesHarder"):
             self.diffOpts += " --find-copies-harder"
 
+        num_shelves = len(self.update_shelve)
+        if num_shelves > 0 and num_shelves != len(commits):
+            sys.exit("number of commits (%d) must match number of shelved changelist (%d)" %
+                     (len(commits), num_shelves))
+
         #
         # Apply the commits, one at a time.  On failure, ask if should
         # continue to try the rest of the patches, or quit.
@@ -2404,12 +2421,6 @@ class P4Sync(Command, P4UserMap):
         if gitConfig("git-p4.syncFromOrigin") == "false":
             self.syncWithOrigin = False
 
-    # This is required for the "append" cloneExclude action
-    def ensure_value(self, attr, value):
-        if not hasattr(self, attr) or getattr(self, attr) is None:
-            setattr(self, attr, value)
-        return getattr(self, attr)
-
     # Force a checkpoint in fast-import and wait for it to finish
     def checkpoint(self):
         self.gitStream.write("checkpoint\n\n")