60 lines
2.2 KiB
JavaScript
60 lines
2.2 KiB
JavaScript
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var fs = require('fs-extra');
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var path = require('path');
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var config = require('./fetchRequires.config.js');
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function checkConfig () {
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if (!config.requirePattern) {
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throw new Error("requirePattern needed at fetchRequires.config.js - Use it to define the regular expression to use for finding require invocations. Example: require\\('(\\..+)'\\)");
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}
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if (!config.defaultExt) {
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throw new Error("defaultExt needed at fetchRequires.config.js - Use it to define the default extension to use for modules. Example: '.js'");
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}
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if (!config.validExtensions) {
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throw new Error("validExtensions needed at fetchRequires.config.js - Use it to laod modules as is. That's it, to define valid extensions that don't need appending the default extension. Example: ['.tpl', '.json']");
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}
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}
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var fetchRequires = function (absoluteFilePath) {
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checkConfig();
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var requirePattern = config.requirePattern;
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var requireGlobalRegex = new RegExp(requirePattern, 'g');
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var requireRegex = new RegExp(requirePattern);
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var defaultExt = config.defaultExt;
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var validExtensions = config.validExtensions;
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return new Promise(function (resolve, reject) {
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fs.readFile(absoluteFilePath, 'utf8', function (err, data) {
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if (err) {
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if (err.code && err.code === 'ENOENT') {
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var error = new Error("ENOENT: no such file '" + err.path + "'. Perhaps we're adding the default extension to a valid file. Check `validExtensions` in fetchRequires.config.js and add a new one if needed.");
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reject(error);
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return;
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}
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reject(err);
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return;
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}
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var requires = [];
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if (data) {
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var matchData = data.match(requireGlobalRegex);
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if (matchData) {
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matchData.forEach(function (require) {
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var exec = requireRegex.exec(require);
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if (exec) {
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var absolutePath = path.resolve(path.dirname(absoluteFilePath), exec[1]);
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var ext = path.extname(absolutePath);
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if (validExtensions.indexOf(ext) === -1) {
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absolutePath += defaultExt;
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}
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requires.push(absolutePath);
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}
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});
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}
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}
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resolve(requires);
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});
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});
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};
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module.exports = fetchRequires;
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