72 lines
1.9 KiB
JavaScript
72 lines
1.9 KiB
JavaScript
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'use strict';
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const path = require('path');
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const fs = require('fs');
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const debug = require('debug')('stylus-lookup');
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/**
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* Determines the resolved dependency path according to
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* the Stylus compiler's dependency lookup behavior
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*
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* @param {Object} options
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* @param {String} options.dependency - the import name
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* @param {String} options.filename - the file containing the import
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* @param {String} options.directory - the location of all stylus files
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* @return {String}
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*/
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module.exports = function({dependency: dep, filename, directory} = {}) {
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if (typeof dep === 'undefined') {
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throw new Error('dependency is not supplied');
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}
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if (typeof filename === 'undefined') {
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throw new Error('filename is not supplied');
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}
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if (typeof directory === 'undefined') {
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throw new Error('directory is not supplied');
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}
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const fileDir = path.dirname(filename);
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debug('trying to resolve: ' + dep);
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debug('filename: ', filename);
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debug('directory: ', directory);
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// Use the file's extension if necessary
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const ext = path.extname(dep) ? '' : path.extname(filename);
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let resolved;
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if (!path.isAbsolute(dep)) {
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resolved = path.resolve(filename, dep) + ext;
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debug('resolved relative dependency: ' + resolved);
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if (fs.existsSync(resolved)) {
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return resolved;
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} else {
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debug('resolved file does not exist');
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}
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}
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const samedir = path.resolve(fileDir, dep) + ext;
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debug('resolving dep about the parent file\'s directory: ' + samedir);
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if (fs.existsSync(samedir)) {
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return samedir;
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} else {
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debug('resolved file does not exist');
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}
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// Check for dep/index.styl file
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const indexFile = path.join(path.resolve(fileDir, dep), 'index.styl');
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debug('resolving dep as if it points to an index.styl file: ' + indexFile);
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if (fs.existsSync(indexFile)) {
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return indexFile;
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} else {
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debug('resolved file does not exist');
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}
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debug('could not resolve the dependency');
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return '';
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};
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