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demo.js
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demo.js
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#!/usr/bin/env node
'use strict';
const updateNotifier = require('update-notifier');
const getStdin = require('get-stdin');
const meow = require('meow');
const formatterPretty = require('eslint-formatter-pretty');
const semver = require('semver');
const openReport = require('./lib/open-report');
const xo = require('.');
const cli = meow(`
Usage
$ xo [<file|glob> ...]
Options
--fix Automagically fix issues
--reporter Reporter to use
--env Environment preset [Can be set multiple times]
--global Global variable [Can be set multiple times]
--ignore Additional paths to ignore [Can be set multiple times]
--space Use space indent instead of tabs [Default: 2]
--no-semicolon Prevent use of semicolons
--prettier Conform to Prettier code style
--node-version Range of Node.js version to support
--plugin Include third-party plugins [Can be set multiple times]
--extend Extend defaults with a custom config [Can be set multiple times]
--open Open files with issues in your editor
--quiet Show only errors and no warnings
--extension Additional extension to lint [Can be set multiple times]
--no-esnext Don't enforce ES2015+ rules
--cwd=<dir> Working directory for files
--stdin Validate/fix code from stdin
--stdin-filename Specify a filename for the --stdin option
Examples
$ xo
$ xo index.js
$ xo *.js !foo.js
$ xo --space
$ xo --env=node --env=mocha
$ xo --plugin=react
$ xo --plugin=html --extension=html
$ echo 'const x=true' | xo --stdin --fix
Tips
- Add XO to your project with \`npm init xo\`.
- Put options in package.json instead of using flags so other tools can read it.
`, {
autoVersion: false,
booleanDefault: undefined,
flags: {
fix: {
type: 'boolean'
},
reporter: {
type: 'string'
},
env: {
type: 'string',
isMultiple: true
},
global: {
type: 'string',
isMultiple: true
},
ignore: {
type: 'string',
isMultiple: true
},
space: {
type: 'string'
},
semicolon: {
type: 'boolean'
},
prettier: {
type: 'boolean'
},
nodeVersion: {
type: 'string'
},
plugin: {
type: 'string',
isMultiple: true
},
extend: {
type: 'string',
isMultiple: true
},
open: {
type: 'boolean'
},
quiet: {
type: 'boolean'
},
extension: {
type: 'string',
isMultiple: true
},
esnext: {
type: 'boolean'
},
cwd: {
type: 'string'
},
stdin: {
type: 'boolean'
},
stdinFilename: {
type: 'string'
}
}
});
updateNotifier({pkg: cli.pkg}).notify();
const {input, flags: options, showVersion} = cli;
// Make data types for `options.space` match those of the API
// Check for string type because `xo --no-space` sets `options.space` to `false`
if (typeof options.space === 'string') {
if (/^\d+$/u.test(options.space)) {
options.space = parseInt(options.space, 10);
} else if (options.space === 'true') {
options.space = true;
} else if (options.space === 'false') {
options.space = false;
} else {
if (options.space !== '') {
// Assume `options.space` was set to a filename when run as `xo --space file.js`
input.push(options.space);
}
options.space = true;
}
}
const log = report => {
const reporter = options.reporter || process.env.GITHUB_ACTIONS ? xo.getFormatter(options.reporter || 'compact') : formatterPretty;
process.stdout.write(reporter(report.results));
process.exitCode = report.errorCount === 0 ? 0 : 1;
};
// `xo -` => `xo --stdin`
if (input[0] === '-') {
options.stdin = true;
input.shift();
}
if (options.version) {
showVersion();
}
if (options.nodeVersion) {
if (options.nodeVersion === 'false') {
options.nodeVersion = false;
} else if (!semver.validRange(options.nodeVersion)) {
console.error('The `node-engine` option must be a valid semver range (for example `>=6`)');
process.exit(1);
}
}
(async () => {
if (options.stdin) {
const stdin = await getStdin();
if (options.stdinFilename) {
options.filename = options.stdinFilename;
}
if (options.fix) {
const result = xo.lintText(stdin, options).results[0];
// If there is no output, pass the stdin back out
process.stdout.write(result.output || stdin);
return;
}
if (options.open) {
console.error('The `open` option is not supported on stdin');
process.exit(1);
}
log(xo.lintText(stdin, options));
} else {
const report = await xo.lintFiles(input, options);
if (options.fix) {
xo.outputFixes(report);
}
if (options.open) {
openReport(report);
}
log(report);
}
})();
#!/usr/bin/env node
'use strict';
const updateNotifier = require('update-notifier');
const getStdin = require('get-stdin');
const meow = require('meow');
const formatterPretty = require('eslint-formatter-pretty');
const semver = require('semver');
const openReport = require('./lib/open-report');
const xo = require('.');
const cli = meow(`
Usage
$ xo [<file|glob> ...]
Options
--fix Automagically fix issues
--reporter Reporter to use
--env Environment preset [Can be set multiple times]
--global Global variable [Can be set multiple times]
--ignore Additional paths to ignore [Can be set multiple times]
--space Use space indent instead of tabs [Default: 2]
--no-semicolon Prevent use of semicolons
--prettier Conform to Prettier code style
--node-version Range of Node.js version to support
--plugin Include third-party plugins [Can be set multiple times]
--extend Extend defaults with a custom config [Can be set multiple times]
--open Open files with issues in your editor
--quiet Show only errors and no warnings
--extension Additional extension to lint [Can be set multiple times]
--no-esnext Don't enforce ES2015+ rules
--cwd=<dir> Working directory for files
--stdin Validate/fix code from stdin
--stdin-filename Specify a filename for the --stdin option
Examples
$ xo
$ xo index.js
$ xo *.js !foo.js
$ xo --space
$ xo --env=node --env=mocha
$ xo --plugin=react
$ xo --plugin=html --extension=html
$ echo 'const x=true' | xo --stdin --fix
Tips
- Add XO to your project with \`npm init xo\`.
- Put options in package.json instead of using flags so other tools can read it.
`, {
autoVersion: false,
booleanDefault: undefined,
flags: {
fix: {
type: 'boolean'
},
reporter: {
type: 'string'
},
env: {
type: 'string',
isMultiple: true
},
global: {
type: 'string',
isMultiple: true
},
ignore: {
type: 'string',
isMultiple: true
},
space: {
type: 'string'
},
semicolon: {
type: 'boolean'
},
prettier: {
type: 'boolean'
},
nodeVersion: {
type: 'string'
},
plugin: {
type: 'string',
isMultiple: true
},
extend: {
type: 'string',
isMultiple: true
},
open: {
type: 'boolean'
},
quiet: {
type: 'boolean'
},
extension: {
type: 'string',
isMultiple: true
},
esnext: {
type: 'boolean'
},
cwd: {
type: 'string'
},
stdin: {
type: 'boolean'
},
stdinFilename: {
type: 'string'
}
}
});
updateNotifier({pkg: cli.pkg}).notify();
const {input, flags: options, showVersion} = cli;
// Make data types for `options.space` match those of the API
// Check for string type because `xo --no-space` sets `options.space` to `false`
if (typeof options.space === 'string') {
if (/^\d+$/u.test(options.space)) {
options.space = parseInt(options.space, 10);
} else if (options.space === 'true') {
options.space = true;
} else if (options.space === 'false') {
options.space = false;
} else {
if (options.space !== '') {
// Assume `options.space` was set to a filename when run as `xo --space file.js`
input.push(options.space);
}
options.space = true;
}
}
const log = report => {
const reporter = options.reporter || process.env.GITHUB_ACTIONS ? xo.getFormatter(options.reporter || 'compact') : formatterPretty;
process.stdout.write(reporter(report.results));
process.exitCode = report.errorCount === 0 ? 0 : 1;
};
// `xo -` => `xo --stdin`
if (input[0] === '-') {
options.stdin = true;
input.shift();
}
if (options.version) {
showVersion();
}
if (options.nodeVersion) {
if (options.nodeVersion === 'false') {
options.nodeVersion = false;
} else if (!semver.validRange(options.nodeVersion)) {
console.error('The `node-engine` option must be a valid semver range (for example `>=6`)');
process.exit(1);
}
}
(async () => {
if (options.stdin) {
const stdin = await getStdin();
if (options.stdinFilename) {
options.filename = options.stdinFilename;
}
if (options.fix) {
const result = xo.lintText(stdin, options).results[0];
// If there is no output, pass the stdin back out
process.stdout.write(result.output || stdin);
return;
}
if (options.open) {
console.error('The `open` option is not supported on stdin');
process.exit(1);
}
log(xo.lintText(stdin, options));
} else {
const report = await xo.lintFiles(input, options);
if (options.fix) {
xo.outputFixes(report);
}
if (options.open) {
openReport(report);
}
log(report);
}
})();