vscode-chrome-debug-core
Version:
A library for building VS Code debug adapters for targets that support the Chrome Remote Debug Protocol
87 lines (85 loc) • 4.01 kB
JavaScript
;
/*---------------------------------------------------------
* Copyright (C) Microsoft Corporation. All rights reserved.
*--------------------------------------------------------*/
Object.defineProperty(exports, "__esModule", { value: true });
const path = require("path");
const baseSourceMapTransformer_1 = require("./baseSourceMapTransformer");
const utils = require("../utils");
const vscode_debugadapter_1 = require("vscode-debugadapter");
/**
* Load SourceMaps on launch. Requires reading the file and parsing out the sourceMappingURL, because
* if you wait until the script is loaded as in LazySMT, you get that info from the runtime.
*/
class EagerSourceMapTransformer extends baseSourceMapTransformer_1.BaseSourceMapTransformer {
init(args) {
super.init(args);
if (args.sourceMaps) {
const generatedCodeGlobs = args.outFiles ?
args.outFiles :
args.outDir ?
[path.join(args.outDir, '**/*.js')] :
[];
// try to find all source files upfront asynchronously
if (generatedCodeGlobs.length > 0) {
vscode_debugadapter_1.logger.log('SourceMaps: preloading sourcemaps for scripts in globs: ' + JSON.stringify(generatedCodeGlobs));
this._preLoad = utils.multiGlob(generatedCodeGlobs)
.then(paths => {
vscode_debugadapter_1.logger.log(`SourceMaps: expanded globs and found ${paths.length} scripts`);
return Promise.all(paths.map(scriptPath => this.discoverSourceMapForGeneratedScript(scriptPath)));
})
.then(() => { });
}
else {
this._preLoad = Promise.resolve();
}
}
}
discoverSourceMapForGeneratedScript(generatedScriptPath) {
return this.findSourceMapUrlInFile(generatedScriptPath)
.then(uri => {
if (uri) {
vscode_debugadapter_1.logger.log(`SourceMaps: sourcemap url parsed from end of generated content: ${uri}`);
return this._sourceMaps.processNewSourceMap(generatedScriptPath, uri, this._isVSClient);
}
else {
vscode_debugadapter_1.logger.log(`SourceMaps: no sourcemap url found in generated script: ${generatedScriptPath}`);
return undefined;
}
})
.catch(err => {
// If we fail to preload one, ignore and keep going
vscode_debugadapter_1.logger.log(`SourceMaps: could not preload for generated script: ${generatedScriptPath}. Error: ${err.toString()}`);
});
}
/**
* Try to find the 'sourceMappingURL' in content or the file with the given path.
* Returns null if no source map url is found or if an error occured.
*/
findSourceMapUrlInFile(pathToGenerated, content) {
if (content) {
return Promise.resolve(this.findSourceMapUrl(content));
}
return utils.readFileP(pathToGenerated)
.then(fileContents => this.findSourceMapUrl(fileContents));
}
/**
* Try to find the 'sourceMappingURL' at the end of the given contents.
* Relative file paths are converted into absolute paths.
* Returns null if no source map url is found.
*/
findSourceMapUrl(contents) {
const lines = contents.split('\n');
for (let l = lines.length - 1; l >= Math.max(lines.length - 10, 0); l--) {
const line = lines[l].trim();
const matches = EagerSourceMapTransformer.SOURCE_MAPPING_MATCHER.exec(line);
if (matches && matches.length === 2) {
return matches[1].trim();
}
}
return null;
}
}
EagerSourceMapTransformer.SOURCE_MAPPING_MATCHER = new RegExp('^//[#@] ?sourceMappingURL=(.+)$');
exports.EagerSourceMapTransformer = EagerSourceMapTransformer;
//# sourceMappingURL=eagerSourceMapTransformer.js.map