81 lines
1.6 KiB
JavaScript
81 lines
1.6 KiB
JavaScript
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/**
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* Module dependencies.
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*/
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var crypto = require('crypto')
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, fs = require('fs')
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, join = require('path').join
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, version = require('../../package').version
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, nodes = require('../nodes');
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var FSCache = module.exports = function(options) {
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options = options || {};
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this._location = options['cache location'] || '.styl-cache';
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if (!fs.existsSync(this._location)) fs.mkdirSync(this._location);
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};
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/**
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* Set cache item with given `key` to `value`.
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*
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* @param {String} key
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* @param {Object} value
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* @api private
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*/
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FSCache.prototype.set = function(key, value) {
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fs.writeFileSync(join(this._location, key), JSON.stringify(value));
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};
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/**
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* Get cache item with given `key`.
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*
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* @param {String} key
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* @return {Object}
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* @api private
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*/
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FSCache.prototype.get = function(key) {
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var data = fs.readFileSync(join(this._location, key), 'utf-8');
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return JSON.parse(data, FSCache.fromJSON);
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};
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/**
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* Check if cache has given `key`.
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*
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* @param {String} key
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* @return {Boolean}
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* @api private
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*/
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FSCache.prototype.has = function(key) {
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return fs.existsSync(join(this._location, key));
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};
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/**
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* Generate key for the source `str` with `options`.
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*
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* @param {String} str
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* @param {Object} options
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* @return {String}
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* @api private
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*/
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FSCache.prototype.key = function(str, options) {
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var hash = crypto.createHash('sha1');
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hash.update(str + version + options.prefix);
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return hash.digest('hex');
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};
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/**
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* JSON to Stylus nodes converter.
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*
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* @api private
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*/
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FSCache.fromJSON = function(key, val) {
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if (val && val.__type) {
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val.__proto__ = nodes[val.__type].prototype;
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}
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return val;
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};
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