git p4: fix-up "import/export of labels to/from p4"

The previous one is already in 'next' but was somewhat lacking.

The configuration "git-p4.validLabelRegexp" is now called
"labelExportRegexp", and its default covers lowercase alphabets as
well.

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

Documentation/git-p4.txt

@@ -267,7 +267,7 @@ These options can be used to modify 'git p4 submit' behavior.
 	Re-author p4 changes before submitting to p4.  This option
 	requires p4 admin privileges.
 
---export-labels:
+--export-labels::
 	Export tags from git as p4 labels. Tags found in git are applied
 	to the perforce working directory.
 
@@ -442,6 +442,11 @@ git-p4.branchList::
 	by a colon (:).  This example declares that both branchA and
 	branchB were created from main:
 
+-------------
+git config       git-p4.branchList main:branchA
+git config --add git-p4.branchList main:branchB
+-------------
+
 git-p4.ignoredP4Labels::
 	List of p4 labels to ignore. This is built automatically as
 	unimportable labels are discovered.
@@ -449,14 +454,9 @@ git-p4.ignoredP4Labels::
 git-p4.importLabels::
 	Import p4 labels into git, as per --import-labels.
 
-git-p4.validLabelRegexp::
+git-p4.labelImportRegexp::
 	Only p4 labels matching this regular expression will be imported. The
-	default value is '[A-Z0-9_\-.]+$'.
-
--------------
-git config       git-p4.branchList main:branchA
-git config --add git-p4.branchList main:branchB
--------------
+	default value is '[a-zA-Z0-9_\-.]+$'.
 
 git-p4.useClientSpec::
 	Specify that the p4 client spec should be used to identify p4
@@ -515,9 +515,9 @@ git-p4.attemptRCSCleanup:
 git-p4.exportLabels::
 	Export git tags to p4 labels, as per --export-labels.
 
-git-p4.validLabelRegexp::
+git-p4.labelExportRegexp::
 	Only p4 labels matching this regular expression will be exported. The
-	default value is '[A-Z0-9_\-.]+$'.
+	default value is '[a-zA-Z0-9_\-.]+$'.
 
 IMPLEMENTATION DETAILS
 ----------------------

git-p4.py

@@ -15,7 +15,7 @@ import re, shutil
 verbose = False
 
 # Only labels/tags matching this will be imported/exported
-defaultLabelRegexp = r'[A-Z0-9_\-.]+$'
+defaultLabelRegexp = r'[a-zA-Z0-9_\-.]+$'
 
 def p4_build_cmd(cmd):
     """Build a suitable p4 command line.
@@ -1255,11 +1255,10 @@ class P4Submit(Command, P4UserMap):
     # Export git tags as p4 labels. Create a p4 label and then tag
     # with that.
     def exportGitTags(self, gitTags):
-        validTagRegexp = gitConfig("git-p4.validTagRegexp")
-        if len(validTagRegexp) == 0:
-            validTagRegexp = defaultLabelRegexp
-        m = re.compile(validTagRegexp)
-        commit_re = re.compile(r'\s*\[git-p4:.*change = (\d+)\s*\]')
+        validLabelRegexp = gitConfig("git-p4.labelExportRegexp")
+        if len(validLabelRegexp) == 0:
+            validLabelRegexp = defaultLabelRegexp
+        m = re.compile(validLabelRegexp)
 
         for name in gitTags:
 
@@ -1269,17 +1268,16 @@ class P4Submit(Command, P4UserMap):
                 continue
 
             # Get the p4 commit this corresponds to
-            changelist = None
-            for l in read_pipe_lines(["git", "log", "--max-count=1", name]):
-                match = commit_re.match(l)
-                if match:
-                    changelist = match.group(1)
+            logMessage = extractLogMessageFromGitCommit(name)
+            values = extractSettingsGitLog(logMessage)
 
-            if not changelist:
+            if not values.has_key('change'):
                 # a tag pointing to something not sent to p4; ignore
                 if verbose:
                     print "git tag %s does not give a p4 commit" % name
                 continue
+            else:
+                changelist = values['change']
 
             # Get the tag details.
             inHeader = True
@@ -2076,7 +2074,7 @@ class P4Sync(Command, P4UserMap):
             print "import p4 labels: " + ' '.join(p4Labels)
 
         ignoredP4Labels = gitConfigList("git-p4.ignoredP4Labels")
-        validLabelRegexp = gitConfig("git-p4.validLabelRegexp")
+        validLabelRegexp = gitConfig("git-p4.labelImportRegexp")
         if len(validLabelRegexp) == 0:
             validLabelRegexp = defaultLabelRegexp
         m = re.compile(validLabelRegexp)

t/t9811-git-p4-label-import.sh

@@ -30,7 +30,7 @@ test_expect_success 'basic p4 labels' '
 
 		p4 tag -l TAG_F1_ONLY main/f1 &&
 		p4 tag -l TAG_WITH\$_SHELL_CHAR main/... &&
-		p4 tag -l this_tag_will_be_skipped main/... &&
+		p4 tag -l this_tag_will_be\ skipped main/... &&
 
 		echo f4 >main/f4 &&
 		p4 add main/f4 &&
@@ -50,7 +50,7 @@ test_expect_success 'basic p4 labels' '
 
 		git p4 clone --dest="$git" //depot@all &&
 		cd "$git" &&
-		git config git-p4.validLabelRegexp ".*TAG.*" &&
+		git config git-p4.labelImportRegexp ".*TAG.*" &&
 		git p4 sync --import-labels --verbose &&
 
 		git tag &&