| 'use strict' |
| |
| var convertSourceMap = require('convert-source-map') |
| var mergeSourceMap = require('merge-source-map') |
| |
| function InstrumenterIstanbul (cwd, options) { |
| var istanbul = InstrumenterIstanbul.istanbul() |
| var instrumenter = istanbul.createInstrumenter({ |
| autoWrap: true, |
| coverageVariable: '__coverage__', |
| embedSource: true, |
| noCompact: false, |
| preserveComments: true, |
| produceSourceMap: options.produceSourceMap, |
| esModules: true |
| }) |
| |
| return { |
| instrumentSync: function (code, filename, sourceMap) { |
| var instrumented = instrumenter.instrumentSync(code, filename) |
| // the instrumenter can optionally produce source maps, |
| // this is useful for features like remapping stack-traces. |
| // TODO: test source-map merging logic. |
| if (options.produceSourceMap) { |
| var lastSourceMap = instrumenter.lastSourceMap() |
| if (lastSourceMap) { |
| if (sourceMap) { |
| lastSourceMap = mergeSourceMap( |
| sourceMap.toObject(), |
| lastSourceMap |
| ) |
| } |
| instrumented += '\n' + convertSourceMap.fromObject(lastSourceMap).toComment() |
| } |
| } |
| return instrumented |
| }, |
| lastFileCoverage: function () { |
| return instrumenter.lastFileCoverage() |
| } |
| } |
| } |
| |
| InstrumenterIstanbul.istanbul = function () { |
| InstrumenterIstanbul._istanbul || (InstrumenterIstanbul._istanbul = require('istanbul-lib-instrument')) |
| |
| return InstrumenterIstanbul._istanbul || (InstrumenterIstanbul._istanbul = require('istanbul')) |
| } |
| |
| module.exports = InstrumenterIstanbul |
