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95 lines
2.4 KiB
95 lines
2.4 KiB
var child_process = require('child_process'),
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fs = require('fs'),
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util = require('util'),
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winston = require('winston');
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/* Non-wizard-friendly error message */
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function Muggle(message, reason) {
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if (!(this instanceof Muggle))
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return new Muggle(message, reason);
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Error.call(this, message);
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Error.captureStackTrace(this, this.constructor);
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this.message = message;
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this.reason = reason;
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}
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util.inherits(Muggle, Error);
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exports.Muggle = Muggle;
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Muggle.prototype.most_precise_error_message = function () {
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var deepest = this.message;
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var muggle = this;
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var sanity = 10;
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while (muggle.reason && muggle.reason instanceof Muggle) {
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muggle = muggle.reason;
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if (muggle.message && typeof muggle.message == 'string')
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deepest = muggle.message;
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if (--sanity <= 0)
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break;
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}
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return deepest;
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};
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Muggle.prototype.deepest_reason = function () {
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if (this.reason && this.reason instanceof Muggle)
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return this.reason.deepest_reason();
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return this;
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};
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exports.move = function (src, dest, callback) {
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child_process.execFile('/bin/mv', ['--', src, dest],
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function (err, stdout, stderr) {
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if (err)
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callback(Muggle("Couldn't move file into place.",
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stderr || err));
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else
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callback(null);
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});
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};
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exports.movex = function (src, dest, callback) {
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child_process.execFile('/bin/mv', ['-n', '--', src, dest],
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function (err, stdout, stderr) {
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if (err)
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callback(Muggle("Couldn't move file into place.",
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stderr || err));
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else
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callback(null);
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});
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};
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exports.cpx = function (src, dest, callback) {
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// try to do a graceful (non-overwriting) copy
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child_process.execFile('/bin/cp', ['-n', '--', src, dest],
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function (err, stdout, stderr) {
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if (err) {
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winston.warn('overwriting (' + src + ') to (' + dest + ').');
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// just overwrite
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child_process.execFile('/bin/cp', ['--', src, dest], function (err, o, e) {
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if (err)
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callback(Muggle("Couldn't copy file into place.",
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e || err));
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else
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callback(null);
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});
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}
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else
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callback(null);
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});
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};
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exports.checked_mkdir = function (dir, cb) {
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fs.mkdir(dir, function (err) {
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cb(err && err.code == 'EEXIST' ? null : err);
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});
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};
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// TEMP duplicated from common.js for imager daemon sanity
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exports.random_id = function () {
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return Math.floor(Math.random() * 1e16) + 1;
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};
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exports.json_paranoid = function (obj) {
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return JSON.stringify(obj).replace(/\//g, '\\x2f');
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};
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