#!/usr/bin/env python -u
from __future__ import print_function
import os
from argparse import ArgumentParser, FileType
from datetime import datetime
from shutil import rmtree
from subprocess import check_call, CalledProcessError
from tempfile import mkdtemp
import yaml
rel = lambda *x: os.path.abspath(os.path.join(os.path.dirname(__file__), *x))
def print_and_run(args):
    print('$ ' + ' '.join(args))
    check_call(args)
def run_ignore_1(fn, args):
    try:
        fn(args)
    except CalledProcessError as e:
        if e.returncode == 1:
            pass
def run(args, silent=False, ignore_1=False):
    if silent:
        fn = check_call
    else:
        fn = print_and_run
    try:
        if ignore_1:
            run_ignore_1(fn, args)
        else:
            fn(args)
        return True
    except Exception as e:
        print('# C&O error: {}'.format(e))
        print('# C&O job failed')
        return False
def now():
    return datetime.utcnow().strftime('%Y-%m-%dT%H:%M:%S+00:00')
def execute(config):
    ok = True
    print('# C&O job started: {}'.format(now()))
    tmp = mkdtemp(prefix='candolint.', dir=rel('workdir'))
    os.chdir(tmp)
    print('# C&O task: clone')
    print('# C&O project URL: {}'.format(config['url']))
    source = './source'
    if ok and not run(['hg', 'clone', config['url'], source]):
        ok = False
    if ok:
        print('$ cd {}'.format(source))
        os.chdir(source)
    if ok and not run(['hg', 'sum']):
        ok = False
    if ok:
        template = (r'# C&O commit: {rev}:{node} {branch}\n'
                    r'# C&O commit date: {date|isodatesec}\n'
                    r'# C&O commit author: {author|person}\n'
                    r'# C&O commit message: {desc|firstline}\n')
        if not run(['hg', 'log', '-r', '.', '-T', template], silent=True):
            ok = False
    if ok:
        print('# C&O task: setup')
        venv = '../venv'
        print_and_run(['virtualenv', venv])
        pip = os.path.join(venv, 'bin', 'pip')
        for linter in config['linters']:
            if 'pip' in linter:
                if not run([pip, 'install'] + linter['pip']):
                    ok = False
                    break
    print('# C&O task: cleanup')
    rmtree(tmp)
    print('# C&O job finished: {}'.format(now()))
def main():
    parser = ArgumentParser()
    parser.add_argument('config', help='configuration file (YAML)', type=FileType('r'))
    args = parser.parse_args()
    config = yaml.safe_load(args.config)
    execute(config)
if __name__ == '__main__':
    main()