Apply patch from clang-format job

git-jenkins-format

#!/usr/bin/env python
import requests
import sys
import subprocess
import os
import tempfile

def get_build_list():
    contents = get_json_data("http://builds.mantidproject.org/job/pull_requests-clang-format/api/json?pretty=true")
    if 'builds' in contents.keys():
        return [build['url'] for build in contents['builds']]
    else:
        print "Could not retrieve build list from server"
        sys.exit(-1)

def get_json_data(url):
    r = requests.get(url)
    if r.status_code == 200:
        return r.json()
    else:
        print "Could not retrieve JSON from server"
        sys.exit(-1)

def get_last_commit():
    try:
        return subprocess.check_output(['git', 'rev-list', '-1', '--no-merges', '--abbrev-commit', 'HEAD']).strip()
    except Exception:
        sys.exit(-1)

def git_apply_patch(patch):
    try:
        return subprocess.check_output(['git', 'apply', patch]).strip()
    except Exception:
        sys.exit(-1)

def find_correct_build():
    last_commit = get_last_commit()
    print "Last commit was: " + last_commit
    print "Searching for build..."

    found = False
    build_urls = get_build_list()
    for url in build_urls:
        data = get_json_data(url + '/api/json')
        if data['result'] == 'FAILURE':
            patch_name = data['artifacts'][0]['fileName']
            patch_base = os.path.splitext(patch_name)[0]
            sha = patch_base.split('-')[-1]

            if sha == last_commit:
                found = True
                break
   
    if not found:
        print "Could not find failed build with patch to apply."
        sys.exit(-1)

    r = requests.get(data['url'] + '/artifact/' + patch_name)
    if r.status_code == 200:
        print "Applying path " + patch_name
        with tempfile.NamedTemporaryFile() as temp:
            temp.write(r.text)
            temp.flush()
            git_apply_patch(temp.name)

if __name__ == "__main__":
    find_correct_build()