Pitching loaders and more complete loader support

.gitignore

@@ -1,7 +1,8 @@
 *.gnumeric
-/node_modules
-/.happypack
+node_modules
+.happypack
 /examples/**/dist
 /tmp
 !/tmp/.gitkeep
-/npm-debug.log
+/npm-debug.log
+/coverage

.istanbul.yml

@@ -0,0 +1,11 @@
+instrumentation:
+  root: lib
+  excludes:
+    - "*.test.js"
+    - "HappyTestUtils.js"
+    - "__tests__/fixtures/**/*"
+  extensions:
+    - .js
+reporting:
+  reports:
+    - html

.nvmrc

@@ -0,0 +1 @@
+v5.9.1

.travis.yml

@@ -1,11 +1,17 @@
 language: node_js
+env:
+  - HAPPY_TEST_TIMEOUT=60000
 node_js:
   - "stable"
-  - "iojs"
   - "4.1"
-  - "4.0"
-  - "0.12"
-  - "0.11"
-  - "0.10"
+  # - "4.0"
+  # - "0.12"
+  # - "0.11"
+  # - "0.10"
 install: npm install --ignore-scripts
-script: npm run prepublish
+script:
+  - npm run lint
+  - npm run test
+  - npm run test-examples
+after_success:
+  - npm run coverage_ci

README.md

@@ -1,4 +1,4 @@
-# HappyPack (beta) [![Build Status](https://travis-ci.org/amireh/happypack.svg)](https://travis-ci.org/amireh/happypack)
+# HappyPack (beta) [![Build Status](https://travis-ci.org/amireh/happypack.svg?branch=master)](https://travis-ci.org/amireh/happypack) [![codecov.io](https://codecov.io/github/amireh/happypack/coverage.svg?branch=master)](https://codecov.io/github/amireh/happypack?branch=master)
 
 Make working with webpack against large code-bases a happier experience.
 
@@ -12,8 +12,8 @@ See "How it works" below for more details.
 ## Motivation
 
 - webpack initial build times are horrifying in large codebases (3k+ modules)
-- something that works against both a one-time build (e.g. for a CI) and with 
-  persistent processes (`--watch` during development)
+- something that works against both a one-time build (e.g. for a CI) and 
+  continuous builds (i.e. `--watch` during development)
 
 ## Usage
 
@@ -39,8 +39,8 @@ exports.plugins = [
 ];
 ```
 
-Now you replace your current JS loaders with HappyPack's (possibly use an env
-variable to enable HappyPack):
+Now you replace your current loaders with HappyPack's loader (possibly use an 
+env variable to enable HappyPack):
 
 ```javascript
 exports.module = {
@@ -55,7 +55,7 @@ exports.module = {
 ```
 
 That's it. Now sources that match `.js$` will be handed off to happypack which 
-will use the loaders you specified to transform them.
+will transform them in parallel using the loaders you specified.
 
 ## Configuration
 
@@ -151,17 +151,6 @@ as HappyPack will switch into a synchronous mode afterwards (i.e. in `watch`
 mode.) Also, if we're using the cache and the compiled versions are indeed
 cached, the threads will be idle.
 
-### `installExitHandler: Boolean`
-
-Whether we should intercept the process's `SIGINT` and clean up when it is 
-received. This is needed because webpack's CLI does not expose any hook for
-cleaning up when it is going down, so it's a good idea to hook into it.
-
-You can turn this off if you don't want this functionality or it gives you
-trouble.
-
-Defaults to: `true`
-
 ## How it works
 
 ![A diagram showing the flow between HappyPack's components](doc/HappyPack_Workflow.png)

TODO.md

@@ -0,0 +1,8 @@
+- [ ] ~~stop serializing options and instead accept webpack config file path and populate fake loader context with that so that worker loaders get access to external options~~
+- [x] pitching loader applier
+- [ ] pass loader options found on the compiler by the loader name to the loader, like `options.transform` or `options.sassLoader`
+- [ ] accept modified `resourcePath` from pitching phase and re-read the source
+- [ ] delay reading the source file until the very point where we need it; pitch
+- [ ] replay loader RPCs for items cached by loaders like `tslint-loader` where the output is actually RPCs like `this.emitWarning` and `this.emitError`
+- [ ] better coverage for background loader failures
+- [ ] 

examples/babel-loader/lib/a.js

@@ -0,0 +1 @@
+const B = require('./b');

examples/babel-loader/package.json

@@ -0,0 +1,12 @@
+{
+  "name": "happypack-examples__babel-loader",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "babel-core": "^6.3.26",
+    "babel-loader": "^6.2.0"
+  }
+}

examples/babel-loader/webpack.config--raw.js

@@ -0,0 +1,20 @@
+var path = require('path');
+
+module.exports = {
+  entry: path.resolve(__dirname, 'lib/a.js'),
+
+  output: {
+    path: path.resolve(__dirname, 'dist'),
+    filename: '[name].raw.js'
+  },
+
+  module: {
+    loaders: [
+      {
+        test: /\.js$/,
+        include: [ path.resolve(__dirname, 'lib') ],
+        loader: 'babel'
+      }
+    ]
+  }
+};

examples/multi-loader/webpack.config.js → examples/babel-loader/webpack.config.js

@@ -2,7 +2,7 @@ var path = require('path');
 var HappyPack = require('../../');
 
 module.exports = {
-  entry: path.resolve(__dirname, 'a.js'),
+  entry: path.resolve(__dirname, 'lib/a.js'),
 
   output: {
     path: path.resolve(__dirname, 'dist'),
@@ -11,15 +11,8 @@ module.exports = {
 
   plugins: [
     new HappyPack({
-      loaders: [
-        {
-          path: path.resolve(__dirname, '../../node_modules/babel-loader/index.js'),
-          query: '?presets[]=es2015,presets[]=react'
-        },
-        {
-          path: path.resolve(__dirname, '../identity-loader.js')
-        }
-      ],
+      cache: process.env.HAPPY_CACHE === '1',
+      loaders: [ 'babel' ],
       threads: 2
     })
   ],
@@ -28,6 +21,7 @@ module.exports = {
     loaders: [
       {
         test: /\.js$/,
+        include: [ path.resolve(__dirname, 'lib') ],
         loader: path.resolve(__dirname, '../../loader')
       }
     ]

examples/build-all.sh

@@ -1,10 +1,14 @@
 #!/usr/bin/env bash
+#
+# Downstream integration tests.
 
 if [ ! -d examples ]; then
   echo "You must run this from happypack root."
   exit 1
 fi
 
+WEBPACK_BIN="$(pwd)/node_modules/.bin/webpack"
+
 function run_task {
   task=$@
   echo -e "\n[$task] STARTING $(date)"
@@ -21,30 +25,88 @@ function run_task {
   fi
 
   echo -e "[$task] FINISHED $(date)\n"
+}
+
+function setup_example {
+  EXAMPLE_DIR=$@
+
+  [ -d $EXAMPLE_DIR/dist ] && rm -r $EXAMPLE_DIR/dist
+  [ -f $EXAMPLE_DIR/package.json ] && (cd $EXAMPLE_DIR; npm install)
+}
+
+function babel_loader {
+  echo "Testing HappyPack with babel-loader"
+  echo "-----------------------------------"
+
+  setup_example "examples/babel-loader"
+
+  (
+    cd examples/babel-loader;
+    $WEBPACK_BIN --bail &&
+    $WEBPACK_BIN --bail --config webpack.config--raw.js &&
+    diff dist/main.js dist/main.raw.js &&
+    grep "success" dist/main.js
+  )
+}
 
-  # exit $exit_status
+function sass_loader {
+  echo "Testing HappyPack using sass + css + style loaders."
+  echo "---------------------------------------------------"
+
+  setup_example "examples/sass-loader"
+
+  (
+    cd examples/sass-loader;
+    $WEBPACK_BIN --bail &&
+    $WEBPACK_BIN --bail --config webpack.config--raw.js &&
+    diff dist/main.js dist/main.raw.js &&
+    grep "background-color: yellow" dist/main.js
+  )
 }
 
-function single_loader {
-  rm -r examples/single-loader/dist
+function tslint_loader {
+  echo "Testing HappyPack using ts-linter (typescript linter)"
+  echo "-----------------------------------------------------"
+
+  setup_example "examples/tslint-loader"
 
-  ./node_modules/.bin/webpack \
-    --bail \
-    --config examples/single-loader/webpack.config.js &&
-  grep "success" ./examples/single-loader/dist/main.js
+  (cd examples/tslint-loader; $WEBPACK_BIN --bail) | grep "forbidden var keyword"
 }
 
-function multi_loader {
-  rm -r examples/multi-loader/dist
+function transform_loader {
+  echo "Testing HappyPack with transform-loader (coffeeify & brfs)"
+  echo "----------------------------------------------------------"
 
-  ./node_modules/.bin/webpack \
-    --bail \
-    --config examples/multi-loader/webpack.config.js &&
-  grep "success" ./examples/multi-loader/dist/main.js
+  setup_example "examples/transform-loader"
+
+	(
+    cd examples/transform-loader;
+    $WEBPACK_BIN --bail &&
+    $WEBPACK_BIN --bail --config webpack.config--raw.js &&
+    diff dist/main.js dist/main.raw.js
+  )
 }
 
-echo "Testing HappyPack using a single loader."
-run_task single_loader
+# purge the cache and previous build artifacts
+find examples -maxdepth 2 -type d -name '.happypack' | xargs rm -r
+find examples -maxdepth 2 -type d -name 'dist' | xargs rm -r
+
+export HAPPY_CACHE=1
+
+run_task babel_loader
+run_task sass_loader
+run_task tslint_loader
+run_task transform_loader
+
+echo "Re-running previous examples with cached sources..."
+echo "---------------------------------------------------"
+
+run_task babel_loader
+run_task sass_loader
+
+# doesn't work right now, we need to replay all loader RPCs on cache load as
+# this loader simply does emitWarning/emitError calls
+#
+# run_task tslint_loader
 
-echo "Testing HappyPack using multiple loaders."
-run_task multi_loader
+run_task transform_loader

examples/dependency/lib/index.js

@@ -0,0 +1,2 @@
+// index.js
+require('./b');

examples/dependency/lib/other.js

@@ -0,0 +1,2 @@
+// other.js
+//

examples/dependency/loader-a.js

@@ -0,0 +1,7 @@
+module.exports = function(s) {
+  return s;
+};
+
+module.exports.pitch = function(x, o) {
+  console.log('[a] in pitch!!\n  [remaining] => %s\n  [preceding] => %s', x, o)
+};

examples/dependency/loader-b.js

@@ -0,0 +1,7 @@
+module.exports = function(s) {
+  return s;
+};
+
+module.exports.pitch = function(x, o) {
+  console.log('[b] in pitch!!\n  [remaining] => %s\n  [preceding] => %s', x, o)
+};

examples/dependency/loader-c.js

@@ -0,0 +1,7 @@
+module.exports = function(s) {
+  return s;
+};
+
+module.exports.pitch = function(x, o) {
+  console.log('[c] in pitch!!\n  [remaining] => %s\n  [preceding] => %s', x, o)
+};

examples/dependency/webpack.config.js

@@ -0,0 +1,24 @@
+var path = require('path');
+
+module.exports = {
+  entry: path.resolve(__dirname, 'lib/index.js'),
+
+  output: {
+    path: path.resolve(__dirname, 'dist'),
+    filename: '[name].js'
+  },
+
+  module: {
+    loaders: [
+      {
+        test: /\.js$/,
+        include: [ path.resolve(__dirname, 'lib') ],
+        loaders: [
+          path.resolve(__dirname, 'loader-c.js'),
+          path.resolve(__dirname, 'loader-b.js'),
+          path.resolve(__dirname, 'loader-a.js'),
+        ],
+      },
+    ]
+  },
+};