urlToRequest.js
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'use strict';
// we can't use path.win32.isAbsolute because it also matches paths starting with a forward slash
const matchNativeWin32Path = /^[A-Z]:[/\\]|^\\\\/i;
function urlToRequest(url, root) {
// Do not rewrite an empty url
if (url === '') {
return '';
}
const moduleRequestRegex = /^[^?]*~/;
let request;
if (matchNativeWin32Path.test(url)) {
// absolute windows path, keep it
request = url;
} else if (root !== undefined && root !== false && /^\//.test(url)) {
// if root is set and the url is root-relative
switch (typeof root) {
// 1. root is a string: root is prefixed to the url
case 'string':
// special case: `~` roots convert to module request
if (moduleRequestRegex.test(root)) {
request = root.replace(/([^~/])$/, '$1/') + url.slice(1);
} else {
request = root + url;
}
break;
// 2. root is `true`: absolute paths are allowed
// *nix only, windows-style absolute paths are always allowed as they doesn't start with a `/`
case 'boolean':
request = url;
break;
default:
throw new Error(
"Unexpected parameters to loader-utils 'urlToRequest': url = " +
url +
', root = ' +
root +
'.'
);
}
} else if (/^\.\.?\//.test(url)) {
// A relative url stays
request = url;
} else {
// every other url is threaded like a relative url
request = './' + url;
}
// A `~` makes the url an module
if (moduleRequestRegex.test(request)) {
request = request.replace(moduleRequestRegex, '');
}
return request;
}
module.exports = urlToRequest;