2.0.1

docs/v2/annotated-source/command.html

@@ -862,19 +862,17 @@ <h1>command.coffee</h1>
                 <a class="pilcrow" href="#section-26">&#182;</a>
               </div>
               <p>The user has requested that the CoffeeScript compiler also transpile
-via Babel. We use Babel as an <code>optionalDependency</code>; see
-<a href="https://docs.npmjs.com/files/package.json#optionaldependencies">https://docs.npmjs.com/files/package.json#optionaldependencies</a>.</p>
+via Babel. We don’t include Babel as a dependency because we want to
+avoid dependencies in general, and most users probably won’t be relying
+on us to transpile for them; we assume most users will probably either
+run CoffeeScript’s output without transpilation (modern Node or evergreen
+browsers) or use a proper build chain like Gulp or Webpack.</p>
 
             </div>
 
             <div class="content"><div class='highlight'><pre>    <span class="hljs-keyword">try</span>
       <span class="hljs-built_in">require</span> <span class="hljs-string">'babel-core'</span>
-    <span class="hljs-keyword">catch</span>
-      <span class="hljs-built_in">console</span>.error <span class="hljs-string">'''
-        To use --transpile, you must have Babel installed and configured.
-        See http://coffeescript.org/#transpilation
-      '''</span>
-      process.exit <span class="hljs-number">1</span></pre></div></div>
+    <span class="hljs-keyword">catch</span></pre></div></div>
 
         </li>
 
@@ -885,14 +883,28 @@ <h1>command.coffee</h1>
               <div class="pilwrap ">
                 <a class="pilcrow" href="#section-27">&#182;</a>
               </div>
-              <p>We’re giving Babel only a string, not a filename or path to a file, so
-it doesn’t know where to search to find a <code>.babelrc</code> file or a <code>babel</code>
-key in a <code>package.json</code>. So if <code>opts.transpile</code> is an object, use that
-as Babel’s options; otherwise figure out what the options should be.</p>
+              <p>Give appropriate instructions depending on whether <code>coffee</code> was run
+locally or globally.</p>
 
             </div>
 
-            <div class="content"><div class='highlight'><pre>    <span class="hljs-keyword">unless</span> <span class="hljs-keyword">typeof</span> opts.transpile <span class="hljs-keyword">is</span> <span class="hljs-string">'object'</span></pre></div></div>
+            <div class="content"><div class='highlight'><pre>      <span class="hljs-keyword">if</span> <span class="hljs-built_in">require</span>.resolve(<span class="hljs-string">'.'</span>).indexOf(process.cwd()) <span class="hljs-keyword">is</span> <span class="hljs-number">0</span>
+        <span class="hljs-built_in">console</span>.error <span class="hljs-string">'''
+          To use --transpile, you must have babel-core installed:
+            npm install --save-dev babel-core
+          And you must save options to configure Babel in one of the places it looks to find its options.
+          See http://coffeescript.org/#transpilation
+        '''</span>
+      <span class="hljs-keyword">else</span>
+        <span class="hljs-built_in">console</span>.error <span class="hljs-string">'''
+          To use --transpile with globally-installed CoffeeScript, you must have babel-core installed globally:
+            npm install --global babel-core
+          And you must save options to configure Babel in one of the places it looks to find its options, relative to the file being compiled or to the current folder.
+          See http://coffeescript.org/#transpilation
+        '''</span>
+      process.exit <span class="hljs-number">1</span>
+
+    opts.transpile = {} <span class="hljs-keyword">unless</span> <span class="hljs-keyword">typeof</span> opts.transpile <span class="hljs-keyword">is</span> <span class="hljs-string">'object'</span></pre></div></div>
 
         </li>
 
@@ -903,46 +915,14 @@ <h1>command.coffee</h1>
               <div class="pilwrap ">
                 <a class="pilcrow" href="#section-28">&#182;</a>
               </div>
-              <p>Find the options based on the path to the file being compiled.</p>
+              <p>Pass a reference to Babel into the compiler, so that the transpile option
+is available for the CLI. We need to do this so that tools like Webpack
+can <code>require(&#39;coffeescript&#39;)</code> and build correctly, without trying to
+require Babel.</p>
 
             </div>
 
-            <div class="content"><div class='highlight'><pre><span class="hljs-function">      <span class="hljs-title">cantFindOptions</span> = -&gt;</span>
-        <span class="hljs-built_in">console</span>.error <span class="hljs-string">'''
-          To use the transpile option, there must be a .babelrc file
-          (or a package.json file with a "babel" key) in the path of the file
-          to be compiled, or in the path of the current working directory.
-          If you are compiling a string via the Node API, the transpile option
-          must be an object with the options to pass to Babel.
-          See http://coffeescript.org/#transpilation
-        '''</span>
-        process.exit <span class="hljs-number">1</span>
-
-      checkPath = <span class="hljs-keyword">if</span> filename
-        path.dirname filename
-      <span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> base
-        base
-      <span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> process?
-        process.cwd()
-      <span class="hljs-keyword">else</span>
-        cantFindOptions()
-
-      <span class="hljs-keyword">loop</span>
-        <span class="hljs-keyword">try</span>
-          opts.transpile = JSON.parse fs.readFileSync path.join(checkPath, <span class="hljs-string">'.babelrc'</span>), <span class="hljs-string">'utf-8'</span>
-          <span class="hljs-keyword">break</span>
-        <span class="hljs-keyword">catch</span>
-          <span class="hljs-keyword">try</span>
-            packageJson = JSON.parse fs.readFileSync(path.join(checkPath, <span class="hljs-string">'package.json'</span>), <span class="hljs-string">'utf-8'</span>)
-            <span class="hljs-keyword">if</span> packageJson.babel?
-              opts.transpile = packageJson.babel
-              <span class="hljs-keyword">break</span>
-
-        <span class="hljs-keyword">if</span> checkPath <span class="hljs-keyword">is</span> path.dirname checkPath <span class="hljs-comment"># We’ve reached the root.</span>
-          cantFindOptions()
-          <span class="hljs-keyword">break</span>
-        <span class="hljs-keyword">else</span>
-          checkPath = path.dirname checkPath</pre></div></div>
+            <div class="content"><div class='highlight'><pre>    opts.transpile.transpile = CoffeeScript.transpile</pre></div></div>
 
         </li>
 
@@ -953,14 +933,15 @@ <h1>command.coffee</h1>
               <div class="pilwrap ">
                 <a class="pilcrow" href="#section-29">&#182;</a>
               </div>
-              <p>Pass a reference to Babel into the compiler, so that the transpile option
-is available for the CLI. We need to do this so that tools like Webpack
-can <code>require(&#39;coffeescript&#39;)</code> and build correctly, without trying to
-require Babel.</p>
+              <p>Babel searches for its options (a <code>.babelrc</code> file, a <code>.babelrc.js</code> file,
+a <code>package.json</code> file with a <code>babel</code> key, etc.) relative to the path
+given to it in its <code>filename</code> option. Make sure we have a path to pass
+along.</p>
 
             </div>
 
-            <div class="content"><div class='highlight'><pre>    opts.transpile.transpile = CoffeeScript.transpile
+            <div class="content"><div class='highlight'><pre>    <span class="hljs-keyword">unless</span> opts.transpile.filename
+      opts.transpile.filename = filename <span class="hljs-keyword">or</span> path.resolve(base <span class="hljs-keyword">or</span> process.cwd(), <span class="hljs-string">'&lt;anonymous&gt;'</span>)
   <span class="hljs-keyword">else</span>
     opts.transpile = <span class="hljs-literal">no</span>
 

docs/v2/annotated-source/nodes.html

@@ -3641,13 +3641,25 @@ <h3 id="class">Class</h3>
                 <a class="pilcrow" href="#section-148">&#182;</a>
               </div>
               <p>Add an expression to the class initializer</p>
-<p>NOTE Currently, only methods and static methods are valid in ES class initializers.
-When additional expressions become valid, this method should be updated to handle them.</p>
+<p>This is the key method for determining whether an expression in a class
+body should appear in the initializer or the executable body. If the given
+<code>node</code> is valid in a class body the method will return a (new, modified,
+or identical) node for inclusion in the class initializer, otherwise
+nothing will be returned and the node will appear in the executable body.</p>
+<p>At time of writing, only methods (instance and static) are valid in ES
+class initializers. As new ES class features (such as class fields) reach
+Stage 4, this method will need to be updated to support them. We
+additionally allow <code>PassthroughLiteral</code>s (backticked expressions) in the
+initializer as an escape hatch for ES features that are not implemented
+(e.g. getters and setters defined via the <code>get</code> and <code>set</code> keywords as
+opposed to the <code>Object.defineProperty</code> method).</p>
 
             </div>
 
             <div class="content"><div class='highlight'><pre>  addInitializerExpression: <span class="hljs-function"><span class="hljs-params">(node)</span> -&gt;</span>
-    <span class="hljs-keyword">if</span> @validInitializerMethod node
+    <span class="hljs-keyword">if</span> node.unwrapAll() <span class="hljs-keyword">instanceof</span> PassthroughLiteral
+      node
+    <span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> @validInitializerMethod node
       @addInitializerMethod node
     <span class="hljs-keyword">else</span>
       <span class="hljs-literal">null</span></pre></div></div>

docs/v2/index.html

@@ -645,7 +645,7 @@
       <section id="overview">
         <p><strong>CoffeeScript is a little language that compiles into JavaScript.</strong> Underneath that awkward Java-esque patina, JavaScript has always had a gorgeous heart. CoffeeScript is an attempt to expose the good parts of JavaScript in a simple way.</p>
 <p>The golden rule of CoffeeScript is: <em>“It’s just JavaScript.”</em> The code compiles one-to-one into the equivalent JS, and there is no interpretation at runtime. You can use any existing JavaScript library seamlessly from CoffeeScript (and vice-versa). The compiled output is readable, pretty-printed, and tends to run as fast or faster than the equivalent handwritten JavaScript.</p>
-<p><strong>Latest Version:</strong> <a href="https://github.com/jashkenas/coffeescript/tarball/2.0.0">2.0.0</a></p>
+<p><strong>Latest Version:</strong> <a href="https://github.com/jashkenas/coffeescript/tarball/2.0.1">2.0.1</a></p>
 <blockquote class="uneditable-code-block"><pre><code class="language-bash"><span class="comment"># Install locally for a project:</span>
 npm install --save-dev coffeescript
 
@@ -4820,7 +4820,7 @@ <h2>Web Chat (IRC)</h2>
         </section>
         <section id="annotated-source">
           <h2>Annotated Source</h2>
-<p>You can browse the CoffeeScript 2.0.0 source in readable, annotated form <a href="annotated-source/">here</a>. You can also jump directly to a particular source file:</p>
+<p>You can browse the CoffeeScript 2.0.1 source in readable, annotated form <a href="annotated-source/">here</a>. You can also jump directly to a particular source file:</p>
 <ul>
 <li><a href="annotated-source/grammar.html">Grammar Rules — src/grammar</a></li>
 <li><a href="annotated-source/lexer.html">Lexing Tokens — src/lexer</a></li>
@@ -5448,10 +5448,19 @@ <h3>Argument parsing and shebang (<code>#!</code>) lines</h3>
       </section>
       <section id="changelog">
         <h2>Changelog</h2>
+<div class="anchor" id="2.0.1"></div>
+<h2 class="header">
+  <a href="https://github.com/jashkenas/coffeescript/compare/2.0.0...2.0.1">2.0.1</a>
+  <span class="timestamp"> &mdash; <time datetime="2017-09-26">September 26, 2017</time></span>
+</h2><ul>
+<li><code>babel-core</code> is no longer listed in <code>package.json</code>, even as an <code>optionalDependency</code>, to avoid it being automatically installed for most users. If you wish to use <code>--transpile</code>, simply install <code>babel-core</code> manually. See <a href="#transpilation">Transpilation</a>.</li>
+<li><code>--transpile</code> now relies on Babel to find its options, i.e. the <code>.babelrc</code> file in the path of the file(s) being compiled. (Previously the CoffeeScript compiler was duplicating this logic, so nothing has changed from a user’s perspective.) This provides automatic support for additional ways to pass options to Babel in future versions, such as the <code>.babelrc.js</code> file coming in Babel 7.</li>
+<li>Backticked expressions in a class body, outside any class methods, are now output in the JavaScript class body itself. This allows for passing through experimental JavaScript syntax like the <a href="https://github.com/tc39/proposal-class-fields">class fields proposal</a>, assuming your <a href="https://babeljs.io/docs/plugins/transform-class-properties/">transpiler supports it</a>.</li>
+</ul>
 <div class="anchor" id="2.0.0"></div>
 <h2 class="header">
   <a href="https://github.com/jashkenas/coffeescript/compare/2.0.0-beta5...2.0.0">2.0.0</a>
-  <span class="timestamp"> &mdash; <time datetime="2017-09-17">September 17, 2017</time></span>
+  <span class="timestamp"> &mdash; <time datetime="2017-09-18">September 18, 2017</time></span>
 </h2><ul>
 <li>Added <code>--transpile</code> flag or <code>transpile</code> Node API option to tell the CoffeeScript compiler to pipe its output through Babel before saving or returning it; see <a href="#transpilation">Transpilation</a>. Also changed the <code>-t</code> short flag to refer to <code>--transpile</code> instead of <code>--tokens</code>.</li>
 <li>Always populate source maps’ <code>sourcesContent</code> property.</li>

docs/v2/test.html

@@ -3529,6 +3529,21 @@ <h1>CoffeeScript Test Suite</h1>
   eq 2, b.s
   eq 2, b.r
 
+test "#4464: backticked expressions in class body", ->
+  class A
+    `get x() { return 42; }`
+
+  class B
+    `get x() { return 42; }`
+    constructor: ->
+      @y = 84
+
+  a = new A
+  eq 42, a.x
+  b = new B
+  eq 42, b.x
+  eq 84, b.y
+
 </script>
 <script type="text/x-coffeescript" class="test" id="cluster">
 # Cluster Module

documentation/sections/changelog.md

@@ -1,7 +1,15 @@
 ## Changelog
 
 ```
-releaseHeader('2017-09-17', '2.0.0', '2.0.0-beta5')
+releaseHeader('2017-09-26', '2.0.1', '2.0.0')
+```
+
+*   `babel-core` is no longer listed in `package.json`, even as an `optionalDependency`, to avoid it being automatically installed for most users. If you wish to use `--transpile`, simply install `babel-core` manually. See [Transpilation](#transpilation).
+*   `--transpile` now relies on Babel to find its options, i.e. the `.babelrc` file in the path of the file(s) being compiled. (Previously the CoffeeScript compiler was duplicating this logic, so nothing has changed from a user’s perspective.) This provides automatic support for additional ways to pass options to Babel in future versions, such as the `.babelrc.js` file coming in Babel 7.
+*   Backticked expressions in a class body, outside any class methods, are now output in the JavaScript class body itself. This allows for passing through experimental JavaScript syntax like the [class fields proposal](https://github.com/tc39/proposal-class-fields), assuming your [transpiler supports it](https://babeljs.io/docs/plugins/transform-class-properties/).
+
+```
+releaseHeader('2017-09-18', '2.0.0', '2.0.0-beta5')
 ```
 
 *   Added `--transpile` flag or `transpile` Node API option to tell the CoffeeScript compiler to pipe its output through Babel before saving or returning it; see [Transpilation](#transpilation). Also changed the `-t` short flag to refer to `--transpile` instead of `--tokens`.

package.json

@@ -8,7 +8,7 @@
     "compiler"
   ],
   "author": "Jeremy Ashkenas",
-  "version": "2.0.0",
+  "version": "2.0.1",
   "license": "MIT",
   "engines": {
     "node": ">=6"