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'use strict';
var Promise = require('bluebird');
var fs = require('fs');
var path = require('path');
var debug_ = require('debug');
var debugVerbose = debug_('purs-loader:verbose');
module.exports = function sourceMap(psModule, js) {
var options = psModule.options;
var jsPath = psModule.jsPath;
var srcPath = psModule.srcPath;
var source = psModule.source;
var remainingRequest = psModule.remainingRequest;
var sourceMapPath = path.join(path.dirname(jsPath), 'index.js.map');
var isSourceMapsEnabled = options.pscArgs && options.pscArgs.sourceMaps;
return new Promise(function (resolve, reject) {
if (!isSourceMapsEnabled) {
resolve({
js: js,
map: undefined
});
} else {
debugVerbose('loading source map %s', sourceMapPath);
fs.readFile(sourceMapPath, 'utf-8', function (error, result) {
if (error) {
reject(error);
} else {
try {
var map = Object.assign(JSON.parse(result), {
sources: [remainingRequest],
file: path.normalize(srcPath),
sourcesContent: [source]
});
var jsRemovedMapUrl = js.replace(/^\/\/# sourceMappingURL=[^\r\n]*/gm, '');
resolve({
js: jsRemovedMapUrl,
map: map
});
} catch (error) {
reject(error);
}
}
});
}
});
};
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