Merge pull request #3 from 1337programming/feature/hmr-support

hot module support for dev environments.

Author: opiepj

README.md

@@ -46,6 +46,11 @@ module.exports = config;
 ```
 Once the build finishes, a child process is spawned firing both a python and node script.
 
+### API
+* onBuildStart: **Array[]**, array of scripts to execute on the initial build. **Default: []**
+* onBuildEnd: **Array[]**, array of scripts to execute after files are emitted. **Default: []**
+* dev: **Boolean**, switch for development environments. This causes scripts to only execute once. Useful for running HMR on webpack-dev-server. **Default: false**
+
 Enjoy
 
 ### Contributions

index.js

@@ -7,7 +7,8 @@ function puts(error, stdout, stderr) {
 function WebpackShellPlugin(options) {
   var defaultOptions = {
     onBuildStart: [],
-    onBuildEnd: []
+    onBuildEnd: [],
+    dev: false
   };
   if (!options.onBuildStart) {
     options.onBuildStart = defaultOptions.onBuildStart;
@@ -28,13 +29,19 @@ WebpackShellPlugin.prototype.apply = function(compiler) {
     if(options.onBuildStart.length){
     console.log("Executing pre-build scripts");
     options.onBuildStart.forEach(function (script) { exec(script, puts)});
+    if (options.dev) {
+      options.onBuildStart = [];
+    }
   }
 });
 
   compiler.plugin("emit", function (compilation, callback) {
     if(options.onBuildEnd.length){
     console.log("Executing post-build scripts");
     options.onBuildEnd.forEach(function(script){ exec(script, puts)});
+    if (options.dev) {
+      options.onBuildEnd = [];
+    }
   }
   callback();
 });