/
traceur-processor.js
63 lines (52 loc) · 1.71 KB
/
traceur-processor.js
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"use strict";
var traceur = require("traceur");
var fs = require("fs");
var q = require("q");
var path = require("path");
var os = require("os");
var rimraf = require("rimraf");
var tmpDir = path.resolve(os.tmpdir(), "_count-to-6_" + process.pid);
var runtimeContents = fs.readFileSync(traceur.RUNTIME_PATH, { encoding: "utf-8" });
module.exports = function (exercise) {
exercise.addProcessor(processor);
exercise.addCleanup(cleanup);
return exercise;
};
function processor(mode, callback) {
var exercise = this;
q.nfcall(fs.mkdir, tmpDir).then(function () {
return q.all([
writeTranspiled(exercise.submission),
writeTranspiled(exercise.solution)
]);
})
.spread(function (newSubmission, newSolution) {
exercise.submission = newSubmission;
exercise.solution = newSolution;
})
.nodeify(callback);
}
function cleanup(mode, passed, callback) {
rimraf(tmpDir, callback);
}
function writeTranspiled(filename) {
return readFile(filename).then(function (contents) {
var newFilename = path.resolve(tmpDir, Math.random() + ".js");
return transpile(contents, filename).then(function (transpiled) {
return writeFile(newFilename, transpiled).thenResolve(newFilename);
});
});
}
function readFile(filename) {
return q.nfcall(fs.readFile, filename, { encoding: "utf8" });
}
function writeFile(filename, contents) {
return q.nfcall(fs.writeFile, filename, contents, { encoding: "utf8" });
}
var transpile = q.fbind(function (contents, filename) {
var transpiled = traceur.compile(contents, {
filename: filename,
modules: "inline"
});
return runtimeContents + transpiled;
});