Spaces:
Sleeping
Sleeping
File size: 1,343 Bytes
cc651f6 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 |
'use strict';
var getFieldAsFn = require('./get-field-as-fn'),
CustomError = require('./get-error');
/**
* Locate the root for input sources using the given codec hash
* @throws Error Where the given codec is missing an encode function
* @this {object} A loader or compilation
* @param {{encode:function}} codec A single codec with an `encode` function
* @returns {function(string):string|Error} An encode function that takes an absolute path
*/
function locateRootWith(codec) {
/* jshint validthis:true */
var context = this,
root = getFieldAsFn('root')(codec);
if (!root) {
return new CustomError('Specified format does not support encoding (it lacks a "root" function)');
}
else {
return function locate() {
// call the root
var located;
try {
located = root.call(context);
}
catch (exception) {
return getNamedError(exception);
}
return located;
function getNamedError(details) {
var name = codec.name || '(unnamed)',
message = [
'Locating root with codec: ' + name,
details && (details.stack ? details.stack : details)
]
.filter(Boolean)
.join('\n');
return new Error(message);
}
};
}
}
module.exports = locateRootWith;
|