137 lines
4.0 KiB
JavaScript
137 lines
4.0 KiB
JavaScript
'use strict';
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var fs = require('fs');
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var path = require('path');
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var SafeBuffer = require('safe-buffer');
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Object.defineProperty(exports, 'commentRegex', {
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get: function getCommentRegex () {
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return /^\s*\/(?:\/|\*)[@#]\s+sourceMappingURL=data:(?:application|text)\/json;(?:charset[:=]\S+?;)?base64,(?:.*)$/mg;
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}
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});
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Object.defineProperty(exports, 'mapFileCommentRegex', {
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get: function getMapFileCommentRegex () {
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// Matches sourceMappingURL in either // or /* comment styles.
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return /(?:\/\/[@#][ \t]+sourceMappingURL=([^\s'"`]+?)[ \t]*$)|(?:\/\*[@#][ \t]+sourceMappingURL=([^\*]+?)[ \t]*(?:\*\/){1}[ \t]*$)/mg;
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}
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});
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function decodeBase64(base64) {
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return (SafeBuffer.Buffer.from(base64, 'base64') || "").toString();
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}
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function stripComment(sm) {
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return sm.split(',').pop();
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}
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function readFromFileMap(sm, dir) {
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// NOTE: this will only work on the server since it attempts to read the map file
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var r = exports.mapFileCommentRegex.exec(sm);
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// for some odd reason //# .. captures in 1 and /* .. */ in 2
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var filename = r[1] || r[2];
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var filepath = path.resolve(dir, filename);
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try {
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return fs.readFileSync(filepath, 'utf8');
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} catch (e) {
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throw new Error('An error occurred while trying to read the map file at ' + filepath + '\n' + e);
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}
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}
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function Converter (sm, opts) {
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opts = opts || {};
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if (opts.isFileComment) sm = readFromFileMap(sm, opts.commentFileDir);
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if (opts.hasComment) sm = stripComment(sm);
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if (opts.isEncoded) sm = decodeBase64(sm);
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if (opts.isJSON || opts.isEncoded) sm = JSON.parse(sm);
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this.sourcemap = sm;
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}
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Converter.prototype.toJSON = function (space) {
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return JSON.stringify(this.sourcemap, null, space);
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};
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Converter.prototype.toBase64 = function () {
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var json = this.toJSON();
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return (SafeBuffer.Buffer.from(json, 'utf8') || "").toString('base64');
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};
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Converter.prototype.toComment = function (options) {
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var base64 = this.toBase64();
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var data = 'sourceMappingURL=data:application/json;charset=utf-8;base64,' + base64;
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return options && options.multiline ? '/*# ' + data + ' */' : '//# ' + data;
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};
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// returns copy instead of original
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Converter.prototype.toObject = function () {
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return JSON.parse(this.toJSON());
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};
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Converter.prototype.addProperty = function (key, value) {
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if (this.sourcemap.hasOwnProperty(key)) throw new Error('property "' + key + '" already exists on the sourcemap, use set property instead');
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return this.setProperty(key, value);
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};
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Converter.prototype.setProperty = function (key, value) {
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this.sourcemap[key] = value;
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return this;
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};
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Converter.prototype.getProperty = function (key) {
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return this.sourcemap[key];
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};
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exports.fromObject = function (obj) {
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return new Converter(obj);
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};
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exports.fromJSON = function (json) {
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return new Converter(json, { isJSON: true });
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};
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exports.fromBase64 = function (base64) {
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return new Converter(base64, { isEncoded: true });
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};
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exports.fromComment = function (comment) {
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comment = comment
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.replace(/^\/\*/g, '//')
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.replace(/\*\/$/g, '');
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return new Converter(comment, { isEncoded: true, hasComment: true });
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};
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exports.fromMapFileComment = function (comment, dir) {
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return new Converter(comment, { commentFileDir: dir, isFileComment: true, isJSON: true });
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};
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// Finds last sourcemap comment in file or returns null if none was found
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exports.fromSource = function (content) {
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var m = content.match(exports.commentRegex);
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return m ? exports.fromComment(m.pop()) : null;
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};
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// Finds last sourcemap comment in file or returns null if none was found
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exports.fromMapFileSource = function (content, dir) {
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var m = content.match(exports.mapFileCommentRegex);
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return m ? exports.fromMapFileComment(m.pop(), dir) : null;
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};
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exports.removeComments = function (src) {
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return src.replace(exports.commentRegex, '');
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};
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exports.removeMapFileComments = function (src) {
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return src.replace(exports.mapFileCommentRegex, '');
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};
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exports.generateMapFileComment = function (file, options) {
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var data = 'sourceMappingURL=' + file;
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return options && options.multiline ? '/*# ' + data + ' */' : '//# ' + data;
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};
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