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'use strict';
var path = require('path'),
fs = require('fs');
var getContextDirectory = require('./utility/get-context-directory'),
enhancedRelative = require('./utility/enhanced-relative');
/**
* Codec for relative paths with respect to the context directory.
* @type {{name:string, decode: function, encode: function, root: function}}
*/
module.exports = {
name : 'project-relative',
decode: decode,
encode: encode,
root : getContextDirectory
};
/**
* Decode the given uri.
* Any path with or without leading slash is tested against context directory.
* @this {{options: object}} A loader or compilation
* @param {string} uri A source uri to decode
* @returns {boolean|string} False where unmatched else the decoded path
*/
function decode(uri) {
/* jshint validthis:true */
var base = getContextDirectory.call(this),
absFile = path.normalize(path.join(base, uri)),
isValid = !!absFile && fs.existsSync(absFile) && fs.statSync(absFile).isFile();
return isValid && absFile;
}
/**
* Encode the given file path.
* @this {{options: object}} A loader or compilation
* @param {string} absolute An absolute file path to encode
* @returns {string} A uri
*/
function encode(absolute) {
/* jshint validthis:true */
var base = getContextDirectory.call(this);
if (!base) {
throw new Error('Cannot locate the Webpack project directory');
}
else {
return '/' + enhancedRelative(base, absolute);
}
}