git-p4: clean up after p4 submit failure

When "p4 submit" command fails in P4Submit.applyCommit, the
workspace is left with the changes.  We already have code to revert
the changes to the workspace when the user decides to cancel
submission by aborting the editor that edits the change description,
and we should treat the "p4 submit" failure the same way.

Clean the workspace if p4_write_pipe raised SystemExit, so that the
user don't have to do it themselves.

Signed-off-by: GIRARD Etienne <egirard@murex.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Luke Diamand <luke@diamand.org>
Signed-off-by: Jeff King <peff@peff.net>

Author: GIRARD Etienne

git-p4.py

@@ -1538,44 +1538,47 @@ def applyCommit(self, id):
         #
         # Let the user edit the change description, then submit it.
         #
-        if self.edit_template(fileName):
-            # read the edited message and submit
-            ret = True
-            tmpFile = open(fileName, "rb")
-            message = tmpFile.read()
-            tmpFile.close()
-            if self.isWindows:
-                message = message.replace("\r\n", "\n")
-            submitTemplate = message[:message.index(separatorLine)]
-            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)
-
-            # 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")
+        submitted = False
 
-        else:
+        try:
+            if self.edit_template(fileName):
+                # read the edited message and submit
+                tmpFile = open(fileName, "rb")
+                message = tmpFile.read()
+                tmpFile.close()
+                if self.isWindows:
+                    message = message.replace("\r\n", "\n")
+                submitTemplate = message[:message.index(separatorLine)]
+                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)
+
+                # 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")
+                submitted = True
+
+        finally:
             # skip this patch
-            ret = False
-            print "Submission cancelled, undoing p4 changes."
-            for f in editedFiles:
-                p4_revert(f)
-            for f in filesToAdd:
-                p4_revert(f)
-                os.remove(f)
-            for f in filesToDelete:
-                p4_revert(f)
+            if not submitted:
+                print "Submission cancelled, undoing p4 changes."
+                for f in editedFiles:
+                    p4_revert(f)
+                for f in filesToAdd:
+                    p4_revert(f)
+                    os.remove(f)
+                for f in filesToDelete:
+                    p4_revert(f)
 
         os.remove(fileName)
-        return ret
+        return submitted
 
     # Export git tags as p4 labels. Create a p4 label and then tag
     # with that.

t/t9807-git-p4-submit.sh

@@ -389,7 +389,7 @@ test_expect_success 'description with Jobs section and bogus following text' '
 	(
 		cd "$cli" &&
 		p4 revert desc6 &&
-		rm desc6
+		rm -f desc6
 	)
 '