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