Truncate github release notes body > 124k characters (closes #965)

lib/plugin/github/GitHub.js

@@ -31,6 +31,12 @@ const parseErrormsg = err => {
   return msg;
 };
 
+const truncateBody = body => {
+  // https://github.com/release-it/release-it/issues/965
+  if (body && body.length >= 124000) return body.substring(0, 124000) + '...';
+  return body;
+};
+
 class GitHub extends Release {
   constructor(...args) {
     super(...args);
@@ -200,7 +206,7 @@ class GitHub extends Release {
     const { version, releaseNotes, isUpdate } = this.getContext();
     const { isPreRelease } = parseVersion(version);
     const name = format(releaseName, this.config.getContext());
-    const body = autoGenerate ? (isUpdate ? null : '') : releaseNotes;
+    const body = autoGenerate ? (isUpdate ? null : '') : truncateBody(releaseNotes);
 
     return Object.assign(options, {
       owner,

test/github.js

@@ -425,3 +425,33 @@ test('should generate GitHub web release url for enterprise host', async t => {
   );
   exec.restore();
 });
+
+test('should truncate long body', async t => {
+  const releaseNotes = 'a'.repeat(125001);
+  const body = 'a'.repeat(124000) + '...';
+  const options = {
+    git,
+    github: {
+      pushRepo,
+      tokenRef,
+      release: true,
+      releaseName: 'Release ${tagName}',
+      releaseNotes: 'echo ' + releaseNotes
+    }
+  };
+  const github = factory(GitHub, { options });
+  const exec = sinon.stub(github.shell, 'exec').callThrough();
+  exec.withArgs('git log --pretty=format:"* %s (%h)" ${from}...${to}').resolves('');
+  exec.withArgs('git describe --tags --match=* --abbrev=0').resolves('2.0.1');
+
+  interceptAuthentication();
+  interceptCollaborator();
+  interceptCreate({ body: { tag_name: '2.0.2', name: 'Release 2.0.2', body } });
+
+  await runTasks(github);
+
+  const { isReleased, releaseUrl } = github.getContext();
+  t.true(isReleased);
+  t.is(releaseUrl, 'https://github.com/user/repo/releases/tag/2.0.2');
+  exec.restore();
+});