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/*
* 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;
})();
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