Add a script to get failures for hydra eval /cc @globin

maintainers/scripts/hydra-eval-failures.py

@@ -0,0 +1,89 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i python -p pythonFull pythonPackages.requests pythonPackages.pyquery pythonPackages.click
+
+# To use, just execute this script with --help to display help.
+
+import subprocess
+import json
+
+import click
+import requests
+from pyquery import PyQuery as pq
+
+
+maintainers_json = subprocess.check_output([
+    'nix-instantiate',
+    'lib/maintainers.nix',
+    '--eval',
+    '--json'])
+maintainers = json.loads(maintainers_json)
+MAINTAINERS = {v: k for k, v in maintainers.iteritems()}
+
+
+def get_response_text(url):
+    return pq(requests.get(url).text)  # IO
+
+EVAL_FILE = {
+    'nixos': 'nixos/release.nix',
+    'nixpkgs': 'pkgs/top-level/release.nix',
+}
+
+
+def get_maintainers(attr_name):
+    nixname = attr_name.split('.')
+    meta_json = subprocess.check_output([
+        'nix-instantiate',
+        '--eval',
+        '--strict',
+        '-A',
+        '.'.join(nixname[1:]) + '.meta',
+        EVAL_FILE[nixname[0]],
+        '--json'])
+    meta = json.loads(meta_json)
+    if meta.get('maintainers'):
+        return [MAINTAINERS[name] for name in meta['maintainers'] if MAINTAINERS.get(name)]
+
+
+@click.command()
+@click.option(
+    '--jobset',
+    default="nixos/release-16.09",
+    help='Hydra project like nixos/release-16.09')
+def cli(jobset):
+    """
+    Given a Hydra project, inspect latest evaluation
+    and print a summary of failed builds
+    """
+
+    url = "http://hydra.nixos.org/jobset/{}".format(jobset)
+
+    # get the last evaluation
+    click.echo(click.style(
+        'Getting latest evaluation for {}'.format(url), fg='green'))
+    d = get_response_text(url)
+    evaluations = d('#tabs-evaluations').find('a[class="row-link"]')
+    latest_eval_url = evaluations[0].get('href')
+
+    # parse last evaluation page
+    click.echo(click.style(
+        'Parsing evaluation {}'.format(latest_eval_url), fg='green'))
+    d = get_response_text(latest_eval_url + '?full=1')
+
+    # TODO: aborted evaluations
+    # TODO: dependency failed without propagated builds
+    for tr in d('img[alt="Failed"]').parents('tr'):
+        a = pq(tr)('a')[1]
+        print "- [ ] [{}]({})".format(a.text, a.get('href'))
+
+        maintainers = get_maintainers(a.text)
+        if maintainers:
+            print "  - maintainers: {}".format(", ".join(map(lambda u: '@' + u, maintainers)))
+        # TODO: print last three persons that touched this file
+        # TODO: pinpoint the diff that broke this build, or maybe it's transient or maybe it never worked?
+
+
+if __name__ == "__main__":
+    try:
+        cli()
+    except:
+        import pdb;pdb.post_mortem()