added version upgrade task

.jshintrc

@@ -3,7 +3,7 @@
   "node": true,
   "white": true,
   "bitwise": false,
-  "curly": true,
+  "curly": false,
   "eqnull": true,
   "eqeqeq": true,
   "forin": true,

grunt/tasks.js

@@ -1,5 +1,9 @@
 module.exports = function (grunt) {
+  var Promise = require('bluebird');
   var utils = require('./utils');
+  var readFile = Promise.promisify(require('fs').readFile);
+  var writeFile = Promise.promisify(require('fs').writeFile);
+
 
   // Default task runs the build process.
   grunt.registerTask('default', [
@@ -37,4 +41,37 @@ module.exports = function (grunt) {
     'mochacov:make_coverage_html',
     'open:coverage'
   ]);
+
+  grunt.registerTask('version', function (type) {
+    var root = require('path').join.bind(null, __dirname, '..');
+    var readmePath = root('README.md');
+    var packagePath = root('package.json');
+    var browserBuildsPath = root('docs/browser_builds.asciidoc');
+
+    Promise.all([
+      require(packagePath),
+      readFile(readmePath, 'utf8'),
+      readFile(browserBuildsPath, 'utf8')
+    ])
+    .spread(function (pkg, readme, browserBuilds) {
+      var current = pkg.version;
+      var next = utils.increaseVersion(current, type);
+
+      pkg.version = next;
+      browserBuilds = utils.replaceAll(browserBuilds, current, next);
+      readme = utils.replaceAll(readme, current, next);
+      readme = utils.replaceAll(
+        readme,
+        'branch=' + utils.minorVersion(current),
+        'branch=' + utils.minorVersion(next)
+      );
+
+      // write all files to disk
+      return Promise.all([
+        writeFile(readmePath, readme),
+        writeFile(browserBuildsPath, browserBuilds),
+        writeFile(packagePath, JSON.stringify(pkg, null, '  '))
+      ]);
+    }).nodeify(this.async());
+  });
 };

grunt/utils.js

@@ -16,4 +16,61 @@ var utils = {
 
 utils.branches._default = pkg.config.default_api_branch;
 
+/*
+ * trim down a version id to the minor version number ('1.5.1' => '1.5')
+ */
+utils.minorVersion = function (version) {
+  return version.split('.').slice(0, 2).join('.');
+};
+
+/*
+ * increment the version based on the release "type"
+ */
+utils.increaseVersion = function (version, type) {
+  var i;
+  switch (type) {
+  case 'major':
+    i = 0;
+    break;
+  case 'minor':
+    i = 1;
+    break;
+  case 'bug':
+  case 'patch':
+  case 'bugfix':
+    i = 2;
+    break;
+  default:
+    throw new TypeError('unexpected version bump type');
+  }
+
+  // breakout the current version
+  var next = version.split('.').map(function (n) {
+    return parseInt(n, 10);
+  });
+
+  // increment the version type
+  next[i] += 1;
+  // clear out all following numbers
+  for (i ++; i < next.length; i++) next[i] = 0;
+  // join back together with '.'
+  return next.join('.');
+};
+
+/*
+ * replace all instances of `replace` with `replacement` without creating a regexp object
+ */
+utils.replaceAll = function (str, replace, replacement) {
+  var out = '';
+  var remaining = str;
+  var i = 0;
+
+  while (~(i = remaining.indexOf(replace))) {
+    out += remaining.substring(0, i) + replacement;
+    remaining = remaining.substr(i + replace.length);
+  }
+
+  return out + remaining;
+};
+
 module.exports = utils;