V8 Buildbot: Add auto-tag bot.

masters/master.client.v8.branches/master.cfg

Index: masters/master.client.v8.branches/master.cfg
diff --git a/masters/master.client.v8.branches/master.cfg b/masters/master.client.v8.branches/master.cfg
index 2d48aa8576463f9e846ac39e75596ce0df62bb40..953de1e20c898c5c7ce951b7f2210619cfdb14e7 100644
--- a/masters/master.client.v8.branches/master.cfg
+++ b/masters/master.client.v8.branches/master.cfg
@@ -7,6 +7,7 @@
 
 from buildbot.changes.filter import ChangeFilter
 from buildbot.scheduler import Nightly
+from buildbot.schedulers.basic import AnyBranchScheduler
 from buildbot.schedulers.basic import SingleBranchScheduler
 
 from common import chromium_utils
@@ -49,11 +50,9 @@ comparator = gitiles_poller.GitilesRevisionComparator()
 c['change_source'] = [
   gitiles_poller.GitilesPoller(
       'https://chromium.googlesource.com/v8/v8',
-      branches=[
-        'refs/branch-heads/%s' % stable_branch,
-        'refs/branch-heads/%s' % beta_branch,
-      ],
+      branches=[re.compile(r'refs/branch\-heads/\d+\.\d+')],
       pollInterval=10,
+      category='release',
       comparator=comparator,
   ),
   gitiles_poller.GitilesPoller(
@@ -115,7 +114,14 @@ s_v8_beta = SingleBranchScheduler(
           'V8 ppc64 - sim - beta branch'],
 )
 
-c['schedulers'] = [s_v8_roll, s_v8_stable, s_v8_beta]
+s_v8_tag = AnyBranchScheduler(
+    name='v8_tag',
+    change_filter=ChangeFilter(category='release'),
+    treeStableTimer=600,
+    builderNames=['Auto-tag'],
+)
+
+c['schedulers'] = [s_v8_roll, s_v8_stable, s_v8_beta, s_v8_tag]
 
 builders = []
 
@@ -134,6 +140,7 @@ CATEGORY_BETA = '2Beta|release'
 CATEGORY_BETA_MIPS = '2Beta|release|mips'
 CATEGORY_BETA_PPC = '2Beta|release|ppc'
 CATEGORY_ROLL = '3Roll|roll'
+CATEGORY_TAG = '4Tag|tag'
 
 b_v8_linux_roll = {
   'name': 'V8 Linux - roll branch',
@@ -343,6 +350,14 @@ b_v8_ppc64_beta = {
   'auto_reboot' : False,
 }
 
+b_v8_auto_tag = {
+  'name': 'Auto-tag',
+  'builddir': 'auto-tag',
+  'factory': m_annotator.BaseFactory('v8/auto_tag'),
+  'category': CATEGORY_TAG,
+  'auto_reboot' : False,
+}
+
 c['builders'] = [b_v8_linux_stable,
                  b_v8_linux_stable_debug,
                  b_v8_linux64_stable,
@@ -368,7 +383,8 @@ c['builders'] = [b_v8_linux_stable,
                  b_v8_linux64_roll,
                  b_v8_linux64_roll_debug,
                  b_v8_arm_roll,
-                 b_v8_arm_roll_debug]
+                 b_v8_arm_roll_debug,
+                 b_v8_auto_tag]
 
 # Associate the slaves to the builders. The configuration is in slaves.cfg.
 slaves = slaves_list.SlavesList('slaves.cfg', 'V8Branches')