Squashed 'thirdparty/systemjs/' content from commit 5ed69b6

git-subtree-dir: thirdparty/systemjs
git-subtree-split: 5ed69b6344e8fc1cd43bf758350b2236f57e1499

1 files changed, 86 insertions, 0 deletions

diff --git a/lib/legacy-transpiler.js b/lib/legacy-transpiler.js
new file mode 100644
index 000000000..79c3d9697
--- /dev/null
+++ b/lib/legacy-transpiler.js
@@ -0,0 +1,86 @@
+/*
+ * Traceur, Babel and TypeScript transpile hook for Loader
+ */
+var transpile = (function() {
+
+  // use Traceur by default
+  Loader.prototype.transpiler = 'traceur';
+
+  function transpile(load) {
+    var self = this;
+
+    return Promise.resolve(__global[self.transpiler == 'typescript' ? 'ts' : self.transpiler]
+        || (self.pluginLoader || self)['import'](self.transpiler))
+    .then(function(transpiler) {
+      if (transpiler.__useDefault)
+        transpiler = transpiler['default'];
+
+      var transpileFunction;
+      if (transpiler.Compiler)
+        transpileFunction = traceurTranspile;
+      else if (transpiler.createLanguageService)
+        transpileFunction = typescriptTranspile;
+      else
+        transpileFunction = babelTranspile;
+
+      // note __moduleName will be part of the transformer meta in future when we have the spec for this
+      return '(function(__moduleName){' + transpileFunction.call(self, load, transpiler) + '\n})("' + load.name + '");\n//# sourceURL=' + load.address + '!transpiled';
+    });
+  };
+
+  function traceurTranspile(load, traceur) {
+    var options = this.traceurOptions || {};
+    options.modules = 'instantiate';
+    options.script = false;
+    if (options.sourceMaps === undefined)
+      options.sourceMaps = 'inline';
+    options.filename = load.address;
+    options.inputSourceMap = load.metadata.sourceMap;
+    options.moduleName = false;
+
+    var compiler = new traceur.Compiler(options);
+
+    return doTraceurCompile(load.source, compiler, options.filename);
+  }
+  function doTraceurCompile(source, compiler, filename) {
+    try {
+      return compiler.compile(source, filename);
+    }
+    catch(e) {
+      // on older versions of traceur (<0.9.3), an array of errors is thrown
+      // rather than a single error.
+      if (e.length) {
+        throw e[0];
+      }
+      throw e;
+    }
+  }
+
+  function babelTranspile(load, babel) {
+    var options = this.babelOptions || {};
+    options.modules = 'system';
+    if (options.sourceMap === undefined)
+      options.sourceMap = 'inline';
+    options.inputSourceMap = load.metadata.sourceMap;
+    options.filename = load.address;
+    options.code = true;
+    options.ast = false;
+
+    return babel.transform(load.source, options).code;
+  }
+
+  function typescriptTranspile(load, ts) {
+    var options = this.typescriptOptions || {};
+    options.target = options.target || ts.ScriptTarget.ES5;
+    if (options.sourceMap === undefined)
+      options.sourceMap = true;
+    if (options.sourceMap && options.inlineSourceMap !== false)
+      options.inlineSourceMap = true;
+
+    options.module = ts.ModuleKind.System;
+
+    return ts.transpile(load.source, options, load.address);
+  }
+
+  return transpile;
+})();