[PATCH 13/19] oe-build-perf-test: new {tag_num} keyword for --commit-results-tag

[Markus Lehtonen <markus.lehtonen@linux.intel.com>]

This makes it possible to create numbered tags, where the "basename" of
the tag is the same and the only difference is an (automatically)
increasing index number. This is useful if you do multiple test runs on
the same commit. For example, using:
--commit-results-tag {tester_host}/{git_commit}/{tag_num}

would give you tags something like:
myhost/decb3119dffd3fd38b800bebc1e510f9217a152e/0
myhost/decb3119dffd3fd38b800bebc1e510f9217a152e/1
...

The default tag format is updated to use this new keyword in order to
prevent unintentional tag name clashes.

Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>
---
 meta/lib/oeqa/buildperf/base.py | 19 +++++++++++++++----
 scripts/oe-build-perf-test      |  2 +-
 2 files changed, 16 insertions(+), 5 deletions(-)

diff --git a/meta/lib/oeqa/buildperf/base.py b/meta/lib/oeqa/buildperf/base.py
index a3cd3f3..faa30c7 100644
--- a/meta/lib/oeqa/buildperf/base.py
+++ b/meta/lib/oeqa/buildperf/base.py
@@ -226,10 +226,21 @@ class BuildPerfTestResult(unittest.TextTestResult):
 
             # Create (annotated) tag
             if tag:
-                # Replace keywords
-                tag = tag.format(git_branch=self.git_branch,
-                                 git_commit=self.git_commit,
-                                 tester_host=self.hostname)
+                # Find tags matching the pattern
+                tag_keywords = dict(git_branch=self.git_branch,
+                                    git_commit=self.git_commit,
+                                    tester_host=self.hostname,
+                                    tag_num='[0-9]{1,5}')
+                tag_re = re.compile(tag.format(**tag_keywords) + '$')
+                tag_keywords['tag_num'] = 0
+                for existing_tag in repo.run_cmd('tag').splitlines():
+                    if tag_re.match(existing_tag):
+                        tag_keywords['tag_num'] += 1
+
+                tag = tag.format(**tag_keywords)
+                msg = "Test run #{} of {}:{}\n".format(tag_keywords['tag_num'],
+                                                       self.git_branch,
+                                                       self.git_commit)
                 repo.run_cmd(['tag', '-a', '-m', msg, tag, commit])
 
         finally:
diff --git a/scripts/oe-build-perf-test b/scripts/oe-build-perf-test
index 1ed5bdb..cd27584 100755
--- a/scripts/oe-build-perf-test
+++ b/scripts/oe-build-perf-test
@@ -140,7 +140,7 @@ def parse_args(argv):
                         default="{git_branch}",
                         help="Commit results to branch BRANCH.")
     parser.add_argument('--commit-results-tag', metavar='TAG',
-                        default="{git_branch}/{git_commit}",
+                        default="{git_branch}/{git_commit}/{tag_num}",
                         help="Tag results commit with TAG.")
 
     return parser.parse_args(argv)
-- 
2.6.6