diff options
Diffstat (limited to 'node_modules/istanbul-lib-source-maps/lib/map-store.js')
| -rw-r--r-- | node_modules/istanbul-lib-source-maps/lib/map-store.js | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/node_modules/istanbul-lib-source-maps/lib/map-store.js b/node_modules/istanbul-lib-source-maps/lib/map-store.js new file mode 100644 index 0000000..a99b79a --- /dev/null +++ b/node_modules/istanbul-lib-source-maps/lib/map-store.js @@ -0,0 +1,226 @@ +/* + Copyright 2015, Yahoo Inc. + Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms. + */ +'use strict'; + +const path = require('path'); +const fs = require('fs'); +const debug = require('debug')('istanbuljs'); +const { SourceMapConsumer } = require('source-map'); +const pathutils = require('./pathutils'); +const { SourceMapTransformer } = require('./transformer'); + +/** + * Tracks source maps for registered files + */ +class MapStore { + /** + * @param {Object} opts [opts=undefined] options. + * @param {Boolean} opts.verbose [opts.verbose=false] verbose mode + * @param {String} opts.baseDir [opts.baseDir=null] alternate base directory + * to resolve sourcemap files + * @param {Class} opts.SourceStore [opts.SourceStore=Map] class to use for + * SourceStore. Must support `get`, `set` and `clear` methods. + * @param {Array} opts.sourceStoreOpts [opts.sourceStoreOpts=[]] arguments + * to use in the SourceStore constructor. + * @constructor + */ + constructor(opts) { + opts = { + baseDir: null, + verbose: false, + SourceStore: Map, + sourceStoreOpts: [], + ...opts + }; + this.baseDir = opts.baseDir; + this.verbose = opts.verbose; + this.sourceStore = new opts.SourceStore(...opts.sourceStoreOpts); + this.data = Object.create(null); + this.sourceFinder = this.sourceFinder.bind(this); + } + + /** + * Registers a source map URL with this store. It makes some input sanity checks + * and silently fails on malformed input. + * @param transformedFilePath - the file path for which the source map is valid. + * This must *exactly* match the path stashed for the coverage object to be + * useful. + * @param sourceMapUrl - the source map URL, **not** a comment + */ + registerURL(transformedFilePath, sourceMapUrl) { + const d = 'data:'; + + if ( + sourceMapUrl.length > d.length && + sourceMapUrl.substring(0, d.length) === d + ) { + const b64 = 'base64,'; + const pos = sourceMapUrl.indexOf(b64); + if (pos > 0) { + this.data[transformedFilePath] = { + type: 'encoded', + data: sourceMapUrl.substring(pos + b64.length) + }; + } else { + debug(`Unable to interpret source map URL: ${sourceMapUrl}`); + } + + return; + } + + const dir = path.dirname(path.resolve(transformedFilePath)); + const file = path.resolve(dir, sourceMapUrl); + this.data[transformedFilePath] = { type: 'file', data: file }; + } + + /** + * Registers a source map object with this store. Makes some basic sanity checks + * and silently fails on malformed input. + * @param transformedFilePath - the file path for which the source map is valid + * @param sourceMap - the source map object + */ + registerMap(transformedFilePath, sourceMap) { + if (sourceMap && sourceMap.version) { + this.data[transformedFilePath] = { + type: 'object', + data: sourceMap + }; + } else { + debug( + 'Invalid source map object: ' + + JSON.stringify(sourceMap, null, 2) + ); + } + } + + /** + * Retrieve a source map object from this store. + * @param filePath - the file path for which the source map is valid + * @returns {Object} a parsed source map object + */ + getSourceMapSync(filePath) { + try { + if (!this.data[filePath]) { + return; + } + + const d = this.data[filePath]; + if (d.type === 'file') { + return JSON.parse(fs.readFileSync(d.data, 'utf8')); + } + + if (d.type === 'encoded') { + return JSON.parse(Buffer.from(d.data, 'base64').toString()); + } + + /* The caller might delete properties */ + return { + ...d.data + }; + } catch (error) { + debug('Error returning source map for ' + filePath); + debug(error.stack); + + return; + } + } + + /** + * Add inputSourceMap property to coverage data + * @param coverageData - the __coverage__ object + * @returns {Object} a parsed source map object + */ + addInputSourceMapsSync(coverageData) { + Object.entries(coverageData).forEach(([filePath, data]) => { + if (data.inputSourceMap) { + return; + } + + const sourceMap = this.getSourceMapSync(filePath); + if (sourceMap) { + data.inputSourceMap = sourceMap; + /* This huge property is not needed. */ + delete data.inputSourceMap.sourcesContent; + } + }); + } + + sourceFinder(filePath) { + const content = this.sourceStore.get(filePath); + if (content !== undefined) { + return content; + } + + if (path.isAbsolute(filePath)) { + return fs.readFileSync(filePath, 'utf8'); + } + + return fs.readFileSync( + pathutils.asAbsolute(filePath, this.baseDir), + 'utf8' + ); + } + + /** + * Transforms the coverage map provided into one that refers to original + * sources when valid mappings have been registered with this store. + * @param {CoverageMap} coverageMap - the coverage map to transform + * @returns {Promise<CoverageMap>} the transformed coverage map + */ + async transformCoverage(coverageMap) { + const hasInputSourceMaps = coverageMap + .files() + .some( + file => coverageMap.fileCoverageFor(file).data.inputSourceMap + ); + + if (!hasInputSourceMaps && Object.keys(this.data).length === 0) { + return coverageMap; + } + + const transformer = new SourceMapTransformer( + async (filePath, coverage) => { + try { + const obj = + coverage.data.inputSourceMap || + this.getSourceMapSync(filePath); + if (!obj) { + return null; + } + + const smc = new SourceMapConsumer(obj); + smc.sources.forEach(s => { + const content = smc.sourceContentFor(s); + if (content) { + const sourceFilePath = pathutils.relativeTo( + s, + filePath + ); + this.sourceStore.set(sourceFilePath, content); + } + }); + + return smc; + } catch (error) { + debug('Error returning source map for ' + filePath); + debug(error.stack); + + return null; + } + } + ); + + return await transformer.transform(coverageMap); + } + + /** + * Disposes temporary resources allocated by this map store + */ + dispose() { + this.sourceStore.clear(); + } +} + +module.exports = { MapStore }; |