How to use the hook function from istanbul

mocha.js

GitHub: beckermarc/cf-abacus

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// match our instrumentMatcher
const sources = {};
const maps = [];
const transformers = [];
if (commander.istanbul)
  istanbul.hook.hookRequire(
    instrumentMatcher(commander.istanbulIncludes),
    transformer(sources, maps, transformers));

// Save the original process send method as it may be mocked by the tests

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index.js

GitHub: SBoudrias/gulp-istanbul

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plugin.hookRequire = function (options) {
  var fileMap = {};

  istanbul.hook.unhookRequire();
  istanbul.hook.hookRequire(function (path) {
    return !!fileMap[normalizePathSep(path)];
  }, function (code, path) {
    return fileMap[normalizePathSep(path)];
  }, options);

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+ 19 other calls in file

jasmine-node-task.js

GitHub: jribble/grunt-jasmine-node-coverage

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var instrumenter = new istanbul.Instrumenter({coverageVariable: coverageVar});
var transformer = instrumenter.instrumentSync.bind(instrumenter);
var hookOpts = {verbose: options.isVerbose};

istanbul.hook.hookRequire(matchFn, transformer, hookOpts);

// Hook context to ensure that all requireJS modules get instrumented.
// Hooking require in isolation does not appear to be sufficient.
istanbul.hook.hookRunInThisContext(matchFn, transformer, hookOpts);

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+ 7 other calls in file

index.js

GitHub: trungfinity/gulp-istanbul

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var through = require('through2').obj;
var path = require('path');
var istanbul = require('istanbul');
var gutil = require('gulp-util');
var _ = require('lodash');
var hook = istanbul.hook;
var Report = istanbul.Report;
var Collector = istanbul.Collector;
var PluginError = gutil.PluginError;

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client.js

GitHub: marcelerz/preceptor

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// Prepare coverage instrumentation
instrumenter = new istanbul.Instrumenter({ coverageVariable: coverageVar, preserveComments: true });
transformer = instrumenter.instrumentSync.bind(instrumenter);

// Hook-up transformer for every new file loaded
istanbul.hook.hookRequire(function (filePath) {
    var allowed = false;

    // Inclusion
    _.each(coverageIncludes, function (include) {

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+ 5 other calls in file

isparta.js

GitHub: beth-dickerson/saturdaze

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  }
});
Object.defineProperty(exports, 'hook', {
  enumerable: true,
  get: function get() {
    return _istanbul.hook;
  }
});
Object.defineProperty(exports, 'Report', {
  enumerable: true,

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