Add support for custom date format configuration

README.md

@@ -85,6 +85,20 @@ As `pr-log` reads repository information from your project you have to add the `
 }
 ```
 
+### Changelog formatting
+
+#### Custom date format
+
+If you want to use a custom date format you can configure `pr-log.dateFormat` in your `package.json`. For example:
+
+```json
+{
+  "pr-log": { "dateFormat": "DD.MM.YYYY" }
+}
+```
+
+Please refer to the [moment.js documentation](https://momentjs.com/docs/#/displaying/format/) for details about the format tokens.
+
 ## Usage
 
 To create or update your changelog run

bin/pr-log.js

@@ -26,13 +26,14 @@ const findRemoteAlias = findRemoteAliasFactory({ git });
 const githubClient = createGithubClient();
 const getMergedPullRequests = getMergedPullRequestsFactory({ githubClient, git, getPullRequestLabel });
 const getCurrentDate = () => new Date();
+const packageInfo = require(path.join(process.cwd(), 'package.json'));
 const dependencies = {
     githubClient,
     prependFile: promisify(prepend),
-    packageInfo: require(path.join(process.cwd(), 'package.json')),
+    packageInfo,
     ensureCleanLocalGitState: ensureCleanLocalGitState({ git, findRemoteAlias }),
     getMergedPullRequests,
-    createChangelog: createChangelogFactory({ getCurrentDate })
+    createChangelog: createChangelogFactory({ getCurrentDate, packageInfo })
 };
 const cliAgent = createCliAgent(dependencies);
 

lib/createChangelog.js

@@ -5,10 +5,13 @@ function formatLinkToPullRequest(repo, pullRequestId) {
     return `[#${pullRequestId}](https://github.com/${repo}/pull/${pullRequestId})`;
 }
 
-export default ({ getCurrentDate }) => {
+export default ({ getCurrentDate, packageInfo }) => {
+    const defaultDateFormat = 'MMMM D, YYYY';
+    const { dateFormat = defaultDateFormat } = packageInfo['pr-log'] || {};
+
     return function createChangelog(newVersionNumber, validLabels, mergedPullRequests, repo) {
         const groupedPullRequests = R.groupBy(R.prop('label'), mergedPullRequests);
-        const date = moment(getCurrentDate()).locale('en').format('MMMM D, YYYY');
+        const date = moment(getCurrentDate()).locale('en').format(dateFormat);
         const title = `## ${newVersionNumber} (${date})`;
 
         let changelog = `${title}\n\n`;

test/unit/lib/createChangelogSpec.js

@@ -3,15 +3,24 @@ import createChangelogFactory from '../../../lib/createChangelog';
 import defaultValidLabels from '../../../lib/validLabels';
 
 test('contains a title with the version number and the formatted date', (t) => {
-    const createChangelog = createChangelogFactory({ getCurrentDate: () => new Date(0) });
+    const createChangelog = createChangelogFactory({ getCurrentDate: () => new Date(0), packageInfo: {} });
     const changelog = createChangelog('1.0.0', defaultValidLabels, []);
     const expectedTitle = '## 1.0.0 (January 1, 1970)';
 
     t.true(changelog.includes(expectedTitle));
 });
 
+test('format the date with a custom date format', (t) => {
+    const packageInfo = { 'pr-log': { dateFormat: 'DD.MM.YYYY' } };
+    const createChangelog = createChangelogFactory({ getCurrentDate: () => new Date(0), packageInfo });
+    const changelog = createChangelog('1.0.0', defaultValidLabels, []);
+    const expectedTitle = '## 1.0.0 (01.01.1970)';
+
+    t.true(changelog.includes(expectedTitle));
+});
+
 test('creates a formatted changelog', (t) => {
-    const createChangelog = createChangelogFactory({ getCurrentDate: () => new Date(0) });
+    const createChangelog = createChangelogFactory({ getCurrentDate: () => new Date(0), packageInfo: {} });
     const mergedPullRequests = [
         {
             id: '1',
@@ -48,7 +57,7 @@ test('creates a formatted changelog', (t) => {
 });
 
 test('uses custom labels when provided', (t) => {
-    const createChangelog = createChangelogFactory({ getCurrentDate: () => new Date(0) });
+    const createChangelog = createChangelogFactory({ getCurrentDate: () => new Date(0), packageInfo: {} });
     const customValidLabels = {
         core: 'Core Features',
         addons: 'Addons'