mt-changelog/lib/latest-tag.js

creates changelogs for git projects

'use strict';

Object.defineProperty(exports, '__esModule', {
  value: true
});
exports.lastSemverTag = lastSemverTag;
exports['default'] = latestTag;

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }

var _childProcessPromise = require('child-process-promise');

var _semver = require('semver');

var _semver2 = _interopRequireDefault(_semver);

function lastSemverTag(tags, excludePreRelease) {
  var versions = tags.filter(function (tag) {
    return _semver2['default'].valid(tag);
  }).map(function (tag) {
    return {
      tag: tag,
      semver: _semver2['default'].parse(tag),
      toString: function toString() {
        return tag;
      }
    };
  }).filter(function (tag) {
    if (tag.semver.prerelease.length === 0) {
      return true;
    }

    return !excludePreRelease;
  }).sort(function (t1, t2) {
    return _semver2['default'].compare(t1.semver, t2.semver);
  });

  if (versions.length === 0) {
    throw 'No previous semver tag found, tag a commit in the past and try again';
  }

  return versions[versions.length - 1].toString();
}

function latestTag() {
  var excludePreRelease = arguments.length <= 0 || arguments[0] === undefined ? false : arguments[0];

  return (0, _childProcessPromise.exec)('git tag').then(function (_ref) {
    var stdout = _ref.stdout;
    return lastSemverTag(stdout.split('\n'), excludePreRelease);
  });
}