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run-with-cover.js
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run-with-cover.js
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/*
Copyright (c) 2012, Yahoo! Inc. All rights reserved.
Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
*/
var Module = require('module'),
path = require('path'),
fs = require('fs'),
nopt = require('nopt'),
which = require('which'),
mkdirp = require('mkdirp'),
existsSync = fs.existsSync || path.existsSync,
inputError = require('../../util/input-error'),
matcherFor = require('../../util/file-matcher').matcherFor,
Instrumenter = require('../../instrumenter'),
Collector = require('../../collector'),
formatOption = require('../../util/help-formatter').formatOption,
hook = require('../../hook'),
Report = require('../../report'),
resolve = require('resolve'),
DEFAULT_REPORT_FORMAT = 'lcov';
function usage(arg0, command) {
console.error('\nUsage: ' + arg0 + ' ' + command + ' [<options>] <executable-js-file-or-command> [-- <arguments-to-jsfile>]\n\nOptions are:\n\n'
+ [
formatOption('--root <path> ', 'the root path to look for files to instrument, defaults to .'),
formatOption('-x <exclude-pattern> [-x <exclude-pattern>]', 'one or more fileset patterns e.g. "**/vendor/**"'),
formatOption('--[no-]default-excludes', 'apply default excludes [ **/node_modules/**, **/test/**, **/tests/** ], defaults to true'),
formatOption('--hook-run-in-context', 'hook vm.runInThisContext in addition to require (supports RequireJS), defaults to false'),
formatOption('--post-require-hook <file> | <module>', 'JS module that exports a function for post-require processing'),
formatOption('--report <report-type>', 'report type, one of html, lcov, lcovonly, none, defaults to lcov (= lcov.info + HTML)'),
formatOption('--dir <report-dir>', 'report directory, defaults to ./coverage'),
formatOption('--print <type>', 'type of report to print to console, one of summary (default), detail, both or none'),
formatOption('--verbose, -v', 'verbose mode')
].join('\n\n') + '\n');
console.error('\n');
}
function run(args, commandName, enableHooks, callback) {
var config = {
root: path,
x: [Array, String],
report: String,
dir: path,
verbose: Boolean,
yui: Boolean,
'default-excludes': Boolean,
print: String,
'self-test': Boolean,
'hook-run-in-context': Boolean,
'post-require-hook': String
},
opts = nopt(config, { v : '--verbose' }, args, 0),
cmdAndArgs = opts.argv.remain,
cmd,
cmdArgs,
reportingDir,
reportClassName,
reports = [],
runFn,
excludes;
if (cmdAndArgs.length === 0) {
return callback(inputError.create('Need a filename argument for the ' + commandName + ' command!'));
}
cmd = cmdAndArgs.shift();
cmdArgs = cmdAndArgs;
if (!existsSync(cmd)) {
try {
cmd = which.sync(cmd);
} catch (ex) {
return callback(inputError.create('Unable to resolve file [' + cmd + ']'));
}
} else {
cmd = path.resolve(cmd);
}
runFn = function () {
process.argv = ["node", cmd].concat(cmdArgs);
if (opts.verbose) {
console.log('Running: ' + process.argv.join(' '));
}
process.env.running_under_istanbul=1;
Module.runMain(cmd, null, true);
};
excludes = typeof opts['default-excludes'] === 'undefined' || opts['default-excludes'] ?
[ '**/node_modules/**', '**/test/**', '**/tests/**' ] : [];
excludes.push.apply(excludes, opts.x);
if (enableHooks) {
reportingDir = opts.dir || path.resolve(process.cwd(), 'coverage');
mkdirp.sync(reportingDir); //ensure we fail early if we cannot do this
reportClassName = opts.report || DEFAULT_REPORT_FORMAT;
reports.push(Report.create(reportClassName, { dir: reportingDir }));
if (opts.print !== 'none') {
switch (opts.print) {
case 'detail':
reports.push(Report.create('text'));
break;
case 'both':
reports.push(Report.create('text'));
reports.push(Report.create('text-summary'));
break;
default:
reports.push(Report.create('text-summary'));
break;
}
}
matcherFor({
root: opts.root || process.cwd(),
includes: [ '**/*.js' ],
excludes: excludes
},
function (err, matchFn) {
if (err) { return callback(err); }
var coverageVar = '$$cov_' + new Date().getTime() + '$$',
instrumenter = new Instrumenter({ coverageVariable: coverageVar }),
transformer = instrumenter.instrumentSync.bind(instrumenter),
hookOpts = { verbose: opts.verbose },
postRequireHook = opts['post-require-hook'],
postLoadHookFile;
if (postRequireHook) {
postLoadHookFile = path.resolve(postRequireHook);
} else if (opts.yui) { //EXPERIMENTAL code: do not rely on this in anyway until the docs say it is allowed
postLoadHookFile = path.resolve(__dirname, '../../util/yui-load-hook');
}
if (postRequireHook) {
if (!existsSync(postLoadHookFile)) { //assume it is a module name and resolve it
try {
postLoadHookFile = resolve.sync(postRequireHook, { basedir: process.cwd() });
} catch (ex) {
if (opts.verbose) { console.error('Unable to resolve [' + postRequireHook + '] as a node module'); }
}
}
}
if (postLoadHookFile) {
if (opts.verbose) { console.log('Use post-load-hook: ' + postLoadHookFile); }
hookOpts.postLoadHook = require(postLoadHookFile)(matchFn, transformer, opts.verbose);
}
if (opts['self-test']) {
hook.unloadRequireCache(matchFn);
}
// runInThisContext is used by RequireJS [issue #23]
if (opts['hook-run-in-context']) {
hook.hookRunInThisContext(matchFn, transformer, hookOpts);
}
hook.hookRequire(matchFn, transformer, hookOpts);
process.once('exit', function () {
var file = path.resolve(reportingDir, 'coverage.json'),
collector,
cov;
if (typeof global[coverageVar] === 'undefined') {
console.error('No coverage information was collected, exit without writing coverage information');
return;
} else {
cov = global[coverageVar];
}
//important: there is no event loop at this point
//everything that happens in this exit handler MUST be synchronous
mkdirp.sync(reportingDir); //yes, do this again since some test runners could clean the dir initially created
console.log('=============================================================================');
console.log('Writing coverage object [' + file + ']');
fs.writeFileSync(file, JSON.stringify(cov), 'utf8');
collector = new Collector();
collector.add(cov);
console.log('Writing coverage reports at [' + reportingDir + ']');
console.log('=============================================================================');
reports.forEach(function (report) {
report.writeReport(collector, true);
});
return callback();
});
runFn();
});
} else {
runFn();
}
}
module.exports = {
run: run,
usage: usage
};