116 lines
2.8 KiB
JavaScript
116 lines
2.8 KiB
JavaScript
define(function(require) {
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var Path = require('src/path');
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function Shell(fs, options) {
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options = options || {};
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var cwd = options.cwd || '/';
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Object.defineProperty(this, 'fs', {
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get: function() { return fs; },
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enumerable: true
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});
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Object.defineProperty(this, 'cwd', {
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get: function() { return cwd; },
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enumerable: true
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});
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// We include `cd` on the this vs. proto so that
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// we can access cwd without exposing it externally.
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this.cd = function(path) {
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this.cwd = Path.resolve(this.cwd, path);
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};
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}
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/**
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* Execute the .js command located at `path`. Such commands
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* should assume the existence of 3 arguments, which will be
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* defined at runtime:
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*
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* * options - an object containing any arguments, data, etc.
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* * callback - a callback function(error, result) to call when done.
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*
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* The .js command's contents should be the body of a function
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* that looks like this:
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*
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* function(fs, options, callback) {
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* // .js code here
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* }
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*/
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Shell.prototype.exec = function(path, options, callback) {
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var fs = this.fs;
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if(typeof options === 'function') {
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callback = options;
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options = {};
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}
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options = options || {};
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callback = callback || function(){};
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path = Path.resolve(this.cwd, path);
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fs.readFile(path, "utf8", function(error, data) {
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if(error) {
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callback(error);
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return;
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}
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try {
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var cmd = new Function('fs', 'options', 'callback', data);
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cmd(fs, options, callback);
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} catch(e) {
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callback(e);
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}
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});
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};
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/**
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* Create a file if it does not exist, or update access and
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* modified times if it does. Valid options include:
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*
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* * updateOnly - whether to create the file if missing (defaults to false)
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* * date - use the provided Date value instead of current date/time
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*/
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Shell.prototype.touch = function(path, options, callback) {
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var fs = this.fs;
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if(typeof options === 'function') {
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callback = options;
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options = {};
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}
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options = options || {};
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callback = callback || function(){};
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path = Path.resolve(this.cwd, path);
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function createFile(path) {
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fs.writeFile(path, '', function(error) {
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callback(error);
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});
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}
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function updateTimes(path) {
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var now = Date.now();
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var atime = options.date || now;
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var mtime = options.date || now;
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fs.utimes(path, atime, mtime, function(error) {
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callback(error);
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});
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}
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fs.stat(path, function(error, stats) {
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if(error) {
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if(options.updateOnly === true) {
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callback();
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} else {
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createFile(path);
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}
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} else {
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updateTimes(path);
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}
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});
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};
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return Shell;
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});
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