Setting to include LMD license into output

bin/lmd_builder.js

@@ -378,7 +378,8 @@ LmdBuilder.prototype.closeStreams = function () {
  * @param {Object} data
  */
 LmdBuilder.prototype.templatePackage = function (data) {
-    return (data.build_info ? data.build_info + '\n' : '') +
+    return (data.license_header ? data.license_header + '\n' : '') +
+    (data.build_info ? data.build_info + '\n' : '') +
     data.lmd_js +
     '\n(' +
         data.global + ',' +
@@ -865,6 +866,7 @@ LmdBuilder.prototype.renderLmdPackage = function (config, modulesBundle, isOptim
     options = JSON.stringify(options);
 
     result = this.templatePackage({
+        license_header: this._licenseHeader(config),
         build_info: this._buildInfo(config),
         lmd_js: lmd_js,
         global: config.global || 'this',
@@ -923,6 +925,17 @@ LmdBuilder.prototype.renderLmdBundle = function (config, modulesBundle) {
     });
 };
 
+LmdBuilder.prototype._licenseHeader = function (config) {
+  if (config.lmd_license_header === true) {
+    var licensePath = path.resolve(__dirname, '../LICENCE'),
+        text = fs.readFileSync(licensePath, 'utf8'),
+        license = text.replace(/^LMD includes as dependencies[\s\S]+/m, '');
+    return '/*! LMD loader and stock plugins: ' + license.trim() + '\n*/';
+  } else {
+    return false;
+  }
+};
+
 LmdBuilder.prototype._buildInfo = function (config) {
     var configFile = path.basename(this.configFile),
         mixinFiles = (config.mixins || []).map(function (mixin) {

lib/lmd_common.js

@@ -11,7 +11,7 @@ var fs = require('fs'),
 require('colors');
 
 var DEFAULT_DEPENDS_MASK = "*.lmd.json";
-var SOURCE_TWEAK_FLAGS = ["warn", "log", "pack", "lazy", "optimize"];
+var SOURCE_TWEAK_FLAGS = ["warn", "log", "pack", "lazy", "optimize", "lmd_license_header"];
 exports.SOURCE_TWEAK_FLAGS = SOURCE_TWEAK_FLAGS;
 
 var INHERITABLE_FIELDS = SOURCE_TWEAK_FLAGS.concat(['version', 'main', 'global', 'pack_options', 'mixins', 'bundles_callback']);

test/build/fixtures/license_header/.lmd/default.lmd.json

@@ -0,0 +1,6 @@
+{
+  "root": "..",
+  "modules": {
+    "empty": "empty.js"
+  }
+}

test/build/fixtures/license_header/.lmd/disabled.lmd.json

@@ -0,0 +1,7 @@
+{
+  "root": "..",
+  "lmd_license_header": false,
+  "modules": {
+    "empty": "empty.js"
+  }
+}

test/build/fixtures/license_header/.lmd/enabled.lmd.json

@@ -0,0 +1,7 @@
+{
+  "root": "..",
+  "lmd_license_header": true,
+  "modules": {
+    "empty": "empty.js"
+  }
+}

test/build/test.licenseheader.js

@@ -0,0 +1,73 @@
+/*global describe, it, beforeEach, afterEach*/
+/*jshint expr:true*/
+
+var path = require('path'),
+    Stream = require('stream'),
+    vow = require('vow'),
+    expect = require('chai').expect;
+
+var Builder = require('../..');
+
+var fixtures = path.join(__dirname, 'fixtures', 'license_header');
+
+function cfgPath(name) {
+    return path.join(fixtures, '.lmd', name + '.lmd.json');
+}
+
+function readStream(stream) {
+    var promise = vow.promise(),
+        body = '';
+
+    if (!stream.readable) {
+        promise.reject(new Error('stream is not readable'));
+        return promise;
+    }
+
+    stream.on('data', function (chunk) {
+        body += chunk;
+    });
+
+    stream.on('end', function () {
+        promise.fulfill(body);
+    });
+
+    stream.on('error', function (error) {
+        promise.reject(error);
+    });
+
+    return promise;
+}
+
+describe('lmd', function() {
+
+    describe('license header', function() {
+        it('is disabled by default', function (done) {
+            var build = new Builder(cfgPath('default'));
+
+            readStream(build)
+                .then(function (body) {
+                    expect(body).to.match(/^\/\/ This file was/);
+                })
+                .then(done, done);
+        });
+        it('could be enabled', function (done) {
+            var build = new Builder(cfgPath('enabled'));
+
+            readStream(build)
+                .then(function (body) {
+                    expect(body).to.match(/^\/\*! .+? MIT License/);
+                })
+                .then(done, done);
+        });
+        it('could be disabled', function (done) {
+            var build = new Builder(cfgPath('disabled'));
+
+            readStream(build)
+                .then(function (body) {
+                    expect(body).to.match(/^\/\/ This file was/);
+                })
+                .then(done, done);
+        });
+
+    });
+});