From 0ed00f7a2ff37c252b36fc6f85ac67ef69df03a6 Mon Sep 17 00:00:00 2001
From: Erwin Mombay <erwinm@google.com>
Date: Tue, 26 Jan 2016 09:39:00 -0800
Subject: [PATCH] add back --version flag to changelog task

---
 build-system/tasks/changelog.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/build-system/tasks/changelog.js b/build-system/tasks/changelog.js
index 2b0667b57ee7..2281873dd06b 100644
--- a/build-system/tasks/changelog.js
+++ b/build-system/tasks/changelog.js
@@ -31,7 +31,6 @@ var git = require('gulp-git');
 var gulp = require('gulp-help')(require('gulp'));
 var request = BBPromise.promisify(require('request'));
 var util = require('gulp-util');
-var version = require('../internal-version').VERSION;
 
 var GITHUB_ACCESS_TOKEN = process.env.GITHUB_ACCESS_TOKEN;
 var exec = BBPromise.promisify(child_process.exec);
@@ -42,6 +41,7 @@ var suffix =  isCanary ? '-canary' : '';
 var branch = isCanary ? 'canary' : 'release';
 var isDryrun = argv.dryrun;
 
+
 function changelog() {
   if (!GITHUB_ACCESS_TOKEN) {
     util.log(util.colors.red('Warning! You have not set the ' +
@@ -57,6 +57,9 @@ function changelog() {
 }
 
 function getGitMetadata() {
+  if (!argv.version) {
+    throw new Error('no version value passed in. See --version flag option.');
+  }
 
   var gitMetadata = {};
   return getLastGitTag()
@@ -70,7 +73,7 @@ function getGitMetadata() {
         if (isDryrun) {
           return;
         }
-        return submitReleaseNotes(version, gitMetadata.changelog);
+        return submitReleaseNotes(argv.version, gitMetadata.changelog);
       })
       .catch(errHandler);
 }
@@ -252,5 +255,6 @@ gulp.task('changelog', 'Create github release draft', changelog, {
   options: {
     dryrun: '  Generate changelog but dont push it out',
     type: '  Pass in "canary" to generate a canary changelog',
+    version: '  The git tag and github release label',
   }
 });