add a script to automate stable porting

common/porttostable.py

@@ -0,0 +1,34 @@
+import os
+from subprocess import CalledProcessError
+from subprocess import check_output
+
+import requests
+import yaml
+
+s = requests.Session()
+with open(os.path.expanduser('~/.config/hub')) as f:
+    config = yaml.load(f)['github.com'][0]
+    s.auth = config['user'], config['oauth_token']
+
+os.system("git fetch --all")
+r = s.get("https://api.github.com/search/issues?q=label:\"port%20to%20stable\"+repo:buildbot/buildbot")
+to_port = r.json()
+summary = ""
+for pr in to_port['items']:
+    r = s.get("https://api.github.com/repos/buildbot/buildbot/pulls/{number}/commits".format(**pr))
+    commits = r.json()
+    for c in commits:
+        title = c['commit']['message'].split("\n")[0]
+        try:
+            check_output("git cherry-pick {sha} 2>&1".format(**c), shell=True)
+        except CalledProcessError as e:
+            os.system("git diff")
+            os.system("git reset --hard HEAD 2>&1 >/dev/null")
+            if '--allow-empty' in e.output:
+                continue
+            if 'fatal: bad object' in e.output:
+                continue
+            print "cannot automatically cherry-pick", pr['number'], c['sha'], title,e.output
+        else:
+            summary += "\n#{number}: {title}".format(number=pr['number'], title=title , **c)
+print summary