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system.js
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system.js
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/*eslint-env node*/
"use strict";
var FS = require("fs");
var Path = require("path");
var Location = require("./location");
var CommonSystem = require("./common-system");
var node = [
"child_process",
"cluster",
"crypto",
"dns",
"domain",
"event_emitter",
"fs",
"http",
"https",
"net",
"os",
"path",
"punycode",
"querystring",
"readline",
"repl",
"smalloc",
"stream",
"string_decoder",
"tls",
"tty",
"url",
"util",
"vm",
"zlib"
];
module.exports = NodeSystem;
function NodeSystem(location, description, options) {
var self = this;
CommonSystem.call(self, location, description, options);
}
NodeSystem.prototype = Object.create(CommonSystem.prototype);
NodeSystem.prototype.constructor = NodeSystem;
NodeSystem.load = CommonSystem.load;
NodeSystem.prototype.read = function read(location, charset) {
var path = Location.toPath(location);
return new Promise(function (resolve, reject) {
FS.readFile(path, charset || "utf8", function (error, content) {
if (error != null) {
if (error.code === "ENOENT") {
error.notFound = true;
}
return reject(error);
}
resolve(content);
});
});
};
NodeSystem.prototype.overlayNode = function overlayNode() {
var self = this;
node.forEach(function (id) {
self.modules[id] = {factory: function (require, exports, module) {
module.exports = require(id);
}};
});
};
NodeSystem.findSystem = function findSystem(directory) {
var self = this;
if (directory === Path.dirname(directory)) {
return Promise.reject(new Error("Can't find package"));
}
var descriptionLocation = Path.join(directory, "package.json");
return new Promise(function (resolve, reject) {
FS.stat(descriptionLocation, function (error, stat) {
if (error != null) {
return reject(error);
}
resolve(stat);
});
})
.then(function (stat) {
return stat.isFile();
}, function () {
return false;
}).then(function (isFile) {
if (isFile) {
return directory;
} else {
return self.findSystem(Path.dirname(directory));
}
});
};
NodeSystem.findSystemLocationAndModuleId = function findSystemLocationAndModuleId(path) {
var self = this;
path = Path.resolve(process.cwd(), path);
var directory = Path.dirname(path);
return self.findSystem(directory)
.then(function (packageDirectory) {
var modulePath = Path.relative(packageDirectory, path);
return {
location: Location.fromDirectory(packageDirectory),
id: "./" + modulePath
};
}, function () {
throw new Error("Can't find package " + JSON.stringify(path));
});
};