147 lines
5.7 KiB
JavaScript
147 lines
5.7 KiB
JavaScript
import path from 'path';
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import fs from './fs';
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import AbstractFileManager from '../less/environment/abstract-file-manager.js';
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class FileManager extends AbstractFileManager {
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supports() {
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return true;
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}
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supportsSync() {
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return true;
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}
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loadFile(filename, currentDirectory, options, environment, callback) {
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let fullFilename;
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const isAbsoluteFilename = this.isPathAbsolute(filename);
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const filenamesTried = [];
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const self = this;
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const prefix = filename.slice(0, 1);
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const explicit = prefix === '.' || prefix === '/';
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let result = null;
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let isNodeModule = false;
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const npmPrefix = 'npm://';
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options = options || {};
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const paths = isAbsoluteFilename ? [''] : [currentDirectory];
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if (options.paths) { paths.push(...options.paths); }
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if (!isAbsoluteFilename && paths.indexOf('.') === -1) { paths.push('.'); }
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const prefixes = options.prefixes || [''];
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const fileParts = this.extractUrlParts(filename);
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if (options.syncImport) {
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getFileData(returnData, returnData);
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if (callback) {
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callback(result.error, result);
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}
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else {
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return result;
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}
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}
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else {
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// promise is guaranteed to be asyncronous
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// which helps as it allows the file handle
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// to be closed before it continues with the next file
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return new Promise(getFileData);
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}
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function returnData(data) {
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if (!data.filename) {
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result = { error: data };
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}
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else {
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result = data;
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}
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}
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function getFileData(fulfill, reject) {
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(function tryPathIndex(i) {
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if (i < paths.length) {
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(function tryPrefix(j) {
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if (j < prefixes.length) {
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isNodeModule = false;
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fullFilename = fileParts.rawPath + prefixes[j] + fileParts.filename;
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if (paths[i]) {
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fullFilename = path.join(paths[i], fullFilename);
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}
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if (!explicit && paths[i] === '.') {
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try {
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fullFilename = require.resolve(fullFilename);
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isNodeModule = true;
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}
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catch (e) {
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filenamesTried.push(npmPrefix + fullFilename);
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tryWithExtension();
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}
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}
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else {
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tryWithExtension();
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}
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function tryWithExtension() {
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const extFilename = options.ext ? self.tryAppendExtension(fullFilename, options.ext) : fullFilename;
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if (extFilename !== fullFilename && !explicit && paths[i] === '.') {
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try {
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fullFilename = require.resolve(extFilename);
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isNodeModule = true;
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}
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catch (e) {
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filenamesTried.push(npmPrefix + extFilename);
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fullFilename = extFilename;
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}
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}
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else {
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fullFilename = extFilename;
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}
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}
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const readFileArgs = [fullFilename];
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if (!options.rawBuffer) {
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readFileArgs.push('utf-8');
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}
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if (options.syncImport) {
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try {
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const data = fs.readFileSync.apply(this, readFileArgs);
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fulfill({ contents: data, filename: fullFilename});
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}
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catch (e) {
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filenamesTried.push(isNodeModule ? npmPrefix + fullFilename : fullFilename);
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return tryPrefix(j + 1);
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}
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}
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else {
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readFileArgs.push(function(e, data) {
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if (e) {
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filenamesTried.push(isNodeModule ? npmPrefix + fullFilename : fullFilename);
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return tryPrefix(j + 1);
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}
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fulfill({ contents: data, filename: fullFilename});
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});
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fs.readFile.apply(this, readFileArgs);
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}
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}
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else {
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tryPathIndex(i + 1);
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}
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})(0);
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} else {
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reject({ type: 'File', message: `'${filename}' wasn't found. Tried - ${filenamesTried.join(',')}` });
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}
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}(0));
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}
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}
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loadFileSync(filename, currentDirectory, options, environment) {
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options.syncImport = true;
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return this.loadFile(filename, currentDirectory, options, environment);
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}
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}
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export default FileManager; |