changed-log/src/get-commits-from-tags.js

require('lazy-ass');
var check = require('check-more-types');
var utils = require('./utils');
var _ = require('lodash');
var Promise = require('bluebird');
var log = console.log.bind(console);
var reposApi = utils.github.repos;
var gTags = Promise.promisify(reposApi.getTags);

function nameAndSha(tags) {
  if (check.array(tags)) {
    return _.map(tags, nameAndSha);
  }
  return {
    name: tags.name,
    sha: tags.commit.sha
  };
}

function trimVersions(tags) {
  return tags.map(function (tag) {
    tag.name = utils.trimVersion(tag.name);
    return tag;
  });
}

function getTags(options) {
  la(check.object(options), 'missing options', options);
  utils.verifyRepoOptions(options);

  return gTags(options)
    .tap(check.array)
    .then(nameAndSha)
    .then(trimVersions);
}

function getFromToTags(question) {
  var tagSchema = {
    from: check.unemptyString,
    to: check.unemptyString
  };
  la(check.schema(tagSchema, question), question);

  return getTags(_.pick(question, 'user', 'repo'))
    .then(function (allTags) {
      la(check.array(allTags), 'missing tags', allTags);
      var fromTag = _.find(allTags, 'name', question.from);
      la(fromTag, 'cannot find tag', question.from, 'all tags', allTags);
      var toTag = _.find(allTags, 'name', question.to);
      la(toTag, 'cannot to tag', question.to, 'all tags', allTags);

      return {
        fromTag: fromTag,
        toTag: toTag,
        allTags: allTags
      };
    });
}

module.exports = getFromToTags;

if (!module.parent) {

  (function examples() {

    /* eslint no-unused-vars:0 */
    function nextUpdateExample() {
      var question = {
        user: 'bahmutov',
        repo: 'next-update',
        from: '0.8.0',
        to: '0.8.2' // or 'latest?'
      };

      log('Getting commit SHA for the given tags');
      log(question);
      getFromToTags(question)
        .then(log);
    }

    function chalkExample() {
      var question = {
        user: 'chalk',
        repo: 'chalk',
        from: '0.5.1',
        to: '0.3.0'
      };

      log('Getting commit SHA for the given tags');
      log('%s / %s from %s to %s',
        question.user, question.repo, question.from, question.to);
      getFromToTags(question)
        .then(log);
    }

    chalkExample();
  }());
}