[PATCH 11 of 12] Commit tags only when required

[Edouard Gomez]

# HG changeset patch
# User Edouard Gomez <ed.gomez at free.fr>
# Date 1166511815 -3600
# Node ID 8a1695aef27b7106f483c947cb793816464fafe8
# Parent  08ce30bd66126628d355090eeefba8990da54a0b
Commit tags only when required

diff -r 08ce30bd6612 -r 8a1695aef27b hg-cvs-import
--- a/hg-cvs-import	Tue Dec 19 08:03:35 2006 +0100
+++ b/hg-cvs-import	Tue Dec 19 08:03:35 2006 +0100
@@ -156,31 +156,36 @@ def committags(patchset):
     if not alltags:
         return
 
-    if alltags:
-        repotags = repo.tags()
-        lines = {}
-        for tag in repotags:
-            lines[tag] = hg.hex(repotags[tag])
-
-        for tag in alltags:
-            for r in alltags[tag]:
-                lines[tag] = r
-        
-        ar = []
-        for x in lines:
-            if x != 'tip':
-                ar.append("%s %s\n" % (lines[x], x))
-        ar.sort()
-        f = repo.wfile(".hgtags", 'w')
-        f.write("".join(ar))
-        f.close()
-
-        date = "%s 0" % int(time.mktime(time.gmtime()))
-        user = namemap.get('convert-repo', 'convert-repo')
-        node = map.get(0, hg.hex(repo.changelog.node(0)))
-        n = repo.rawcommit([".hgtags"], "Update tags", user,
+    writetags = False
+    repotags = repo.tags()
+    lines = {}
+    for tag in repotags:
+        lines[tag] = hg.hex(repotags[tag])
+
+    for tag in alltags:
+        r = alltags[tag][-1]
+	if tag not in lines or lines[tag] != r:
+            lines[tag] = r
+            writetags = True
+
+    if not writetags:
+        return
+
+    ar = []
+    for x in lines:
+        if x != 'tip':
+            ar.append("%s %s\n" % (lines[x], x))
+    ar.sort()
+    f = repo.wfile(".hgtags", 'w')
+    f.write("".join(ar))
+    f.close()
+
+    date = "%s 0" % int(time.mktime(time.gmtime()))
+    user = namemap.get('convert-repo', 'convert-repo')
+    node = map.get(0, hg.hex(repo.changelog.node(0)))
+    n = repo.rawcommit([".hgtags"], "Update tags", user,
                         date, hg.bin(node), hg.nullid)
-        mapf.write("%d %s\n" % (0, hg.hex(repo.changelog.tip())))
+    mapf.write("%d %s\n" % (0, hg.hex(repo.changelog.tip())))
 
 def branchlookup(branch):
     # XXX: Flush the repo branch cache