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