Run gas over the top Go repositories in Github

topkeks.py

import os
import requests
import subprocess
import tempfile

def _top_repositories(url=None):
    if not url:
        url = "https://api.github.com/search/repositories?q=language:go&sort=stars&order=desc"
    r = requests.get(url)
    results = r.json()
    for repo in results['items']:
        yield repo['name'], repo['clone_url']

def _clone_repository(directory, url, name):
    with open("/dev/null", "w") as out:
        subprocess.call(["git", "clone", url, name, "--depth=1"],
                        stdout=out, stderr=out, cwd=directory)

def _run_gas(gas, directory, logfile):
    rules = ["-rule=sql",
             "-rule=rsa",
             "-rule=crypto",
             "-rule=tls_good",
             "-rule=templates"
            ]
    cmd = [gas]
    cmd.extend(rules)
    cmd.append("./...")
    with open(logfile, "w") as log:
        subprocess.call(cmd, stdout=log, stderr=log, cwd=directory)

def run():
    gopath = os.environ['GOPATH']
    if not gopath:
        print("Please set GOPATH environment variable")
        os.exit(1)
    gas = os.path.join(gopath, "bin", "gas")
    if not os.path.exists(gas):
        print("Please run 'go install' github.com/HewlettPackard/gas")
        os.exit(1)

    tmp = tempfile.mkdtemp(suffix="-gas", dir=".")
    for name, url in _top_repositories():
        print("Cloning: {}".format(url))
        _clone_repository(tmp, url, name)
        repo = os.path.join(tmp, name)
        _run_gas(gas, repo, "{}.log".format(repo))

    print("Results located in: {}/*.log".format(tmp))

if __name__ == "__main__":
    run()