Merge lp://qastaging/~cjohnston/qa-dashboard/auto-update-assets into lp://qastaging/qa-dashboard

14 +regex = re.compile(ur'0 static files copied,')
22 + if not regex.search(output):

should we make this check for >0 amount of files copied? ie - could this code path get hit if an exception were thrown and the program didn't print anything? or maybe search for:

 regex = re.compile(ur'\d+ static files copied,')
 match = regex.search(output)
 if not match:
    print("WTF???")
 elif output[0] != '0':
    print("update")

why str(new_dir) ? isn't it already a string?
32 + subprocess.check_call(['bzr', 'mkdir', str(new_dir)], cwd=assets_dir)

How about using shutil to copy a directory rather than this:

33 + subprocess.check_call(
34 + [
35 + 'cp',
36 + '-r',
37 + str(static_dir),
38 + str(new_dir),
39 + ],
40 + cwd=assets_dir,
41 + )

57 + try:
58 + from bzrlib.branch import Branch
59 + branch = Branch.open_containing('.')[0]
60 + bzr_revno = '%s' % (int(branch.revno())+1)
61 + except:
62 + bzr_revno = 'unknown'
63 +

I usually like using the API, but in this case we mask a potential import-error (ie python-bzrlib) isn't installed with some generic error (i think). I'd either put that import at the top of the file. or just use subprocess like you do everywhere else for your bzr stuff with:

 return int(subprocess.check_output(['bzr', 'revno'], cwd=...))

nitpicking, but its nicer form to use context managers:

71 + f = open(file_name, "w")
72 + f.write("""revision = '%s'""" % revno)
73 + f.close()

with open(file_name, 'w') as f:
    f.write(.......)

and one less line of code

PASSED: Continuous integration, rev:693
http://s-jenkins.ubuntu-ci:8080/job/dashboard-ci/266/
Executed test runs:

Click here to trigger a rebuild:
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PASSED: Continuous integration, rev:695
http://s-jenkins.ubuntu-ci:8080/job/dashboard-ci/267/
Executed test runs:

Click here to trigger a rebuild:
http://s-jenkins.ubuntu-ci:8080/job/dashboard-ci/267/rebuild

PASSED: Continuous integration, rev:697
http://s-jenkins.ubuntu-ci:8080/job/dashboard-ci/268/
Executed test runs:

Click here to trigger a rebuild:
http://s-jenkins.ubuntu-ci:8080/job/dashboard-ci/268/rebuild

PASSED: Continuous integration, rev:698
http://s-jenkins.ubuntu-ci:8080/job/dashboard-ci/269/
Executed test runs:

Click here to trigger a rebuild:
http://s-jenkins.ubuntu-ci:8080/job/dashboard-ci/269/rebuild

looks good. i just have one minor nit - you can take it or leave it:

54 + if os.path.exists(file_name):
55 + os.remove(file_name)

That code isn't need open(file_name, 'w') will truncate the file