grunt: add MultiTask for compiling with amberc

grunt/tasks/amberc-grunt.js

@@ -0,0 +1,105 @@
+module.exports = function(grunt) {
+
+  var path = require('path');
+  var amberc = require('../../bin/amberc.js');
+
+  /**
+     Full config looks like this:
+     amberc: {
+       _config: {
+         amber_dir: process.cwd(),     // REQUIRED
+         closure_jar: ''               // optional
+       },
+       helloWorld: {
+         src: ['HelloWorld.st'],             // REQUIRED
+         working_dir: 'projects/HelloWorld', // optional
+         main_class: 'HelloWorld',           // optional
+         output_name: 'helloWorld',          // optional
+         libraries: 'Canvas',                // optional
+         init: 'myInit',                     // optional
+         main_file: 'myMain.js',             // optional
+         deploy: true,                       // optional
+         output_suffix: 'mySuffix',          // optional
+         library_suffix: '-0.9',             // optional
+       },
+     },
+
+   */
+  grunt.registerMultiTask('amberc', 'Compile Smalltalk files with the amberc compiler', function() {
+    // mark required properties
+    this.requiresConfig('amberc._config.amber_dir');
+    this.requiresConfig(['amberc', this.target, 'src']);
+
+    // change working directory if the working_dir property is set on the target
+    var current_dir = process.cwd();
+    var working_dir = this.data.working_dir;
+    if (undefined !== working_dir) {
+      grunt.file.setBase(working_dir);
+    }
+
+    // mark task as async task
+    var done = this.async();
+    
+    // create and initialize amberc
+    var compiler = new amberc.Compiler(grunt.config('amberc._config.amber_dir'), grunt.config('amberc._config.closure_jar'));
+
+    // generate the amberc parameter string out of the given target properties
+    var parameters = generateParameterArray(this.data);
+    
+    // run the compiler
+    // change back to the old working directory and call the async callback once finished
+    compiler.main(parameters, function(){
+      grunt.file.setBase(current_dir);
+      done();
+    });
+  });
+
+
+  function generateParameterArray(data) {
+    var parameters = [];
+
+    var libraries = data.libraries;
+    if (undefined !== libraries) {
+      parameters.push('-l');
+      parameters.push(libraries.join(','));
+    }
+    var initFile = data.init;
+    if (undefined !== initFile) {
+      parameters.push('-i');
+      parameters.push(initFile);
+    }
+    var mainClass = data.main_class;
+    if (undefined !== mainClass) {
+      parameters.push('-m');
+      parameters.push(mainClass);
+    }
+    var mainFile = data.main_file;
+    if (undefined !== initFile) {
+      parameters.push('-M');
+      parameters.push(mainFile);
+    }
+    if (true === data.deploy) {
+      parameters.push('-d');
+    }
+    var outputSuffix = data.output_suffix;
+    if (undefined !== outputSuffix) {
+      parameters.push('-s');
+      parameters.push(outputSuffix);
+    }
+    var librarySuffix = data.library_suffix;
+    if (undefined !== librarySuffix) {
+      parameters.push('-S');
+      parameters.push(librarySuffix);
+    }
+    var sourceFiles = data.src;
+    if (undefined !== sourceFiles) {
+      parameters.push.apply(parameters, sourceFiles);
+    }
+    var outpuName = data.output_name;
+    if (undefined !== outpuName) {
+      parameters.push(outpuName);
+    }
+    return parameters;
+  }
+
+};