tasks.py

# -*- coding: utf-8 -*-
"""Read the Docs invoke tasks."""

from __future__ import division, print_function, unicode_literals

import os
import textwrap

from dateutil.parser import parse
from future.moves.configparser import RawConfigParser
from invoke import task, Exit


@task
def prepare(ctx, version):
    """
    Prepare the next release version by updating files.

    This will stage a few updates for manual review and commit:

    * Prepend the most recent PRs and issues that were closed to CHANGELOG.rst.
    * Update the setup.cfg version

    Changelog uses the file modification date to track the last time it was
    updated.  New entries will end up at the top of the file, under a heading
    for the new version.
    """
    # Ensure we're on the master branch first
    git_rev_parse = ctx.run('git rev-parse --abbrev-ref HEAD', hide=True)
    current_branch = git_rev_parse.stdout.strip()
    if current_branch != 'master':
        print('You must be on master branch!')
        raise Exit(1)

    print('Updating release version in setup.cfg')
    setupcfg_path = os.path.join(os.path.dirname(__file__), 'setup.cfg')
    config = RawConfigParser()
    config.read(setupcfg_path)
    config.set('metadata', 'version', version)
    with open(setupcfg_path, 'wb') as configfile:
        config.write(configfile)

    print('Installing github-changelog')
    # Get last modified date from Git instead of assuming the file metadata is
    # correct. This can change depending on git reset, etc.
    git_log = ctx.run('git log -1 --format="%ad" -- CHANGELOG.rst')
    last_modified = parse(git_log.stdout.strip()).strftime('%Y-%m-%d')
    # Install and run
    ctx.run('npm install git+https://github.com/agjohnson/github-changelog.git')
    changelog_path = os.path.join(os.path.dirname(__file__), 'CHANGELOG.rst')
    template_path = os.path.join(
        os.path.dirname(__file__),
        'contrib',
        'changelog.hbs',
    )
    bin_path = os.path.join(
        os.path.dirname(__file__),
        'node_modules',
        '.bin',
    )
    cmd = (
        '{bin_path}/gh-changelog '
        '-o rtfd -r readthedocs.org '
        '--file {changelog_path} '
        '--since {last_modified} '
        '--template {template_path} '
        '--header "Version {version}"'
    ).format(
        bin_path=bin_path,
        version=version,
        template_path=template_path,
        changelog_path=changelog_path,
        last_modified=last_modified,
    )  # yapf: disable
    try:
        token = os.environ['GITHUB_TOKEN']
        cmd += '--token ' + token + ' '
    except KeyError:
        print('')
        print(
            '\n'.join(
                textwrap.wrap(
                    'In order to avoid rate limiting on the GitHub API, you can specify '
                    'an environment variable `GITHUB_TOKEN` with a personal access token. '
                    'There is no need for the token to have any permissions unless the '
                    'repoistory is private.')))
        print('')
    print('Updating changelog')
    ctx.run(cmd)


@task
def release(ctx, version):
    """
    Tag release of Read the Docs.

    Do this after prepare task and manual cleanup/commit
    """
    ctx.run(
        ('git tag {version} && '
         'git push --tags').format(version=version))