experimental/tools/gerrit-change-id-to-number

Change-Id: I10a46d2d9c8a710f6816f697e48366366078e4f0
Reviewed-on: https://skia-review.googlesource.com/86640
Reviewed-by: Hal Canary <halcanary@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>

2 files changed, 56 insertions, 0 deletions

diff --git a/experimental/documentation/gerrit.md b/experimental/documentation/gerrit.md
index 1f41391311..24cf0b6b7e 100644
--- a/experimental/documentation/gerrit.md
+++ b/experimental/documentation/gerrit.md
@@ -94,6 +94,16 @@ Updating a Change
     The title of this patch set will be "this is the patch set comment message".
 
 
+Using `git cl try`
+------------------
+
+On your current branch, after uploading to gerrit:
+
+    git cl issue $(experimental/tools/gerrit-change-id-to-number @)
+
+Now `git cl try` and `bin/try` will work correctly.
+
+
 Scripting
 ---------
 
@@ -105,6 +115,10 @@ The following alias amends the head without editing the commit message:
 
     git config alias.amend-head 'commit --all --amend --reuse-message=@'
 
+Set the CL issue numnber:
+
+    git config alias.setcl '!git-cl issue $(experimental/tools/gerrit-change-id-to-number @)'
+
 The following shell script will squash all commits on the current branch,
 assuming that the branch has an upstream topic branch.
 
diff --git a/experimental/tools/gerrit-change-id-to-number b/experimental/tools/gerrit-change-id-to-number
new file mode 100755
index 0000000000..ddc9045edb
--- /dev/null
+++ b/experimental/tools/gerrit-change-id-to-number
@@ -0,0 +1,42 @@
+#!/usr/bin/env python
+# Copyright 2017 Google Inc.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import httplib
+import json
+import re
+import subprocess
+import sys
+
+def retrieve_changeid(commit_or_branch):
+  b = subprocess.check_output(['git', 'log', '-1', '--format=%B', commit_or_branch])
+  r = re.compile(r'^Change-Id: (.*)$')
+  for l in b.split('\n'):
+    m = r.match(l)
+    if m:
+      return m.group(1)
+  return None
+
+def gerrit_change_id_to_number(cid):
+    conn = httplib.HTTPSConnection('skia-review.googlesource.com')
+    conn.request('GET', '/changes/?q=change:%s' % cid)
+    r = conn.getresponse()
+    assert(r.status == 200)
+    x = r.read()
+    i = 0
+    while i < len(x) and x[i] != '[':
+      i += 1
+    print json.loads(x[i:])[0]['_number']
+
+if __name__ == '__main__':
+  try:
+    if len(sys.argv) == 2 and len(sys.argv[1]) == 41 and sys.argv[1][0] == 'I':
+      gerrit_change_id_to_number(sys.argv[1])
+    else:
+      changeid = retrieve_changeid(sys.argv[1] if len(sys.argv) == 2 else 'HEAD')
+      if changeid is None:
+        exit(2)
+      gerrit_change_id_to_number(changeid)
+  except:
+    exit(1)