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index.js
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index.js
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const path = require('path');
const arrify = require('arrify');
const minimatch = require('minimatch');
const readPkgUp = require('read-pkg-up');
const requireMainFilename = require('require-main-filename');
class TestExclude {
constructor(opts) {
Object.assign(
this,
{
cwd: process.cwd(),
include: false,
relativePath: true,
configKey: null, // the key to load config from in package.json.
configPath: null, // optionally override requireMainFilename.
configFound: false,
excludeNodeModules: true
},
opts
);
if (typeof this.include === 'string') {
this.include = [this.include];
}
if (typeof this.exclude === 'string') {
this.exclude = [this.exclude];
}
if (!this.include && !this.exclude && this.configKey) {
Object.assign(this, this.pkgConf(this.configKey, this.configPath));
}
if (!this.exclude || !Array.isArray(this.exclude)) {
this.exclude = exportFunc.defaultExclude;
}
if (this.include && this.include.length > 0) {
this.include = prepGlobPatterns(arrify(this.include));
} else {
this.include = false;
}
if (
this.excludeNodeModules &&
!this.exclude.includes('**/node_modules/**')
) {
this.exclude.push('**/node_modules/**');
}
this.exclude = prepGlobPatterns([].concat(arrify(this.exclude)));
this.handleNegation();
}
/* handle the special case of negative globs
* (!**foo/bar); we create a new this.excludeNegated set
* of rules, which is applied after excludes and we
* move excluded include rules into this.excludes.
*/
handleNegation() {
const noNeg = e => e.charAt(0) !== '!';
const onlyNeg = e => e.charAt(0) === '!';
const stripNeg = e => e.slice(1);
if (Array.isArray(this.include)) {
const includeNegated = this.include.filter(onlyNeg).map(stripNeg);
this.exclude.push(...prepGlobPatterns(includeNegated));
this.include = this.include.filter(noNeg);
}
this.excludeNegated = this.exclude.filter(onlyNeg).map(stripNeg);
this.exclude = this.exclude.filter(noNeg);
this.excludeNegated = prepGlobPatterns(this.excludeNegated);
}
shouldInstrument(filename, relFile) {
let pathToCheck = filename;
if (this.relativePath) {
relFile = relFile || path.relative(this.cwd, filename);
// Don't instrument files that are outside of the current working directory.
if (/^\.\./.test(path.relative(this.cwd, filename))) {
return false;
}
pathToCheck = relFile.replace(/^\.[\\/]/, ''); // remove leading './' or '.\'.
}
const dot = { dot: true };
const matches = pattern => minimatch(pathToCheck, pattern, dot);
return (
(!this.include || this.include.some(matches)) &&
(!this.exclude.some(matches) || this.excludeNegated.some(matches))
);
}
pkgConf(key, path) {
const cwd = path || requireMainFilename(require);
const obj = readPkgUp.sync({ cwd });
if (obj.pkg && obj.pkg[key] && typeof obj.pkg[key] === 'object') {
this.configFound = true;
return obj.pkg[key];
}
return {};
}
}
function prepGlobPatterns(patterns) {
return patterns.reduce((result, pattern) => {
// Allow gitignore style of directory exclusion
if (!/\/\*\*$/.test(pattern)) {
result = result.concat(pattern.replace(/\/$/, '') + '/**');
}
// Any rules of the form **/foo.js, should also match foo.js.
if (/^\*\*\//.test(pattern)) {
result = result.concat(pattern.replace(/^\*\*\//, ''));
}
return result.concat(pattern);
}, []);
}
const exportFunc = opts => new TestExclude(opts);
exportFunc.defaultExclude = [
'coverage/**',
'packages/*/test/**',
'test/**',
'test{,-*}.js',
'**/*{.,-}test.js',
'**/__tests__/**',
'**/node_modules/**',
'**/babel.config.js'
];
module.exports = exportFunc;