How to use the execa.stderr function in execa
To help you get started, we’ve selected a few execa examples, based on popular ways it is used in public projects.
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flow-typed / flow-typed / definitions / npm / execa_v0.10.x / test_execa.js View on Github 
execa(['ls', '-l']).then(printStdout);
// $ExpectError
execa('ls').then(printErrno);
(execa.stdout('ls'): Promise);
execa.stdout('ls').then(stdout => stdout.toLowerCase());
execa.stdout('ls', ['-l']).then(stdout => stdout.toLowerCase());
execa.stdout('ls', { uid: 1000, gid: 100 }).then(stdout => stdout.toLowerCase());
execa.stdout('ls', ['-l'], { timeout: 5 }).then(stdout => stdout.toLowerCase());
// $ExpectError
execa.stdout(['ls', '-l']);
// $ExpectError
execa.stdout('ls', { foo: 666 });
(execa.stderr('ls'): Promise);
execa.stderr('ls').then(stdout => stdout.toLowerCase());
execa.stderr('ls', ['-l']).then(stdout => stdout.toLowerCase());
execa.stderr('ls', { uid: 1000, gid: 100 }).then(stdout => stdout.toLowerCase());
execa.stderr('ls', ['-l'], { timeout: 5 }).then(stdout => stdout.toLowerCase());
// $ExpectError
execa.stderr(['ls', '-l']);
// $ExpectError
execa.stderr('ls', { foo: 666 });
(execa.shell('ls | wc -l'): ThenableChildProcess);
execa.shell('ls | wc -l').then(printStdout, printErrno);
execa.shell('ls | wc -l', { cwd: '/' }).then(printStdout);
execa.shell('foo').catch(printErrno);
// $ExpectError
execa.shell(['ls', 'wc -l']);
// $ExpectError
execa.stderr('ls', 'wc -l', { foo: 666 });execa.shell('ls | wc -l').then(printStdout, printErrno);
execa.shell('ls | wc -l', { cwd: '/' }).then(printStdout);
execa.shell('foo').catch(printErrno);
// $ExpectError
execa.shell(['ls', 'wc -l']);
// $ExpectError
execa.stderr('ls', 'wc -l', { foo: 666 });
(execa.sync('ls'): SyncResult);
(execa.sync('ls', ['-l']).stdout: string);
(execa.sync('ls', { stderr: 'pipe' }).signal: ?string);
(execa.sync('ls', ['-l'], { localDir: '~/' }).failed: boolean);
// $ExpectError
execa.sync(['ls']);
// $ExpectError
execa.stderr('ls', { foo: 666 });
// $ExpectError
execa.sync('ls').killed;
// $ExpectError
execa.sync('ls', { input: process.stdin });
(execa.shellSync('ls | wc -l'): SyncResult);
(execa.shellSync('ls | wc -l', { stderr: 'ignore' }).stdout: string);
// $ExpectError
execa.shellSync(['ls', 'wc -l']);
// $ExpectError
execa.shellSync('ls', { foo: 666 });
async () => {
const { stdout } = await execa('noop', ['foo'], { stripEof: false });
};execa.stdout('ls').then(stdout => stdout.toLowerCase());
execa.stdout('ls', ['-l']).then(stdout => stdout.toLowerCase());
execa.stdout('ls', { uid: 1000, gid: 100 }).then(stdout => stdout.toLowerCase());
execa.stdout('ls', ['-l'], { timeout: 5 }).then(stdout => stdout.toLowerCase());
// $ExpectError
execa.stdout(['ls', '-l']);
// $ExpectError
execa.stdout('ls', { foo: 666 });
(execa.stderr('ls'): Promise);
execa.stderr('ls').then(stdout => stdout.toLowerCase());
execa.stderr('ls', ['-l']).then(stdout => stdout.toLowerCase());
execa.stderr('ls', { uid: 1000, gid: 100 }).then(stdout => stdout.toLowerCase());
execa.stderr('ls', ['-l'], { timeout: 5 }).then(stdout => stdout.toLowerCase());
// $ExpectError
execa.stderr(['ls', '-l']);
// $ExpectError
execa.stderr('ls', { foo: 666 });
(execa.shell('ls | wc -l'): ThenableChildProcess);
execa.shell('ls | wc -l').then(printStdout, printErrno);
execa.shell('ls | wc -l', { cwd: '/' }).then(printStdout);
execa.shell('foo').catch(printErrno);
// $ExpectError
execa.shell(['ls', 'wc -l']);
// $ExpectError
execa.stderr('ls', 'wc -l', { foo: 666 });
(execa.sync('ls'): SyncResult);
(execa.sync('ls', ['-l']).stdout: string);
(execa.sync('ls', { stderr: 'pipe' }).signal: ?string);
(execa.sync('ls', ['-l'], { localDir: '~/' }).failed: boolean);execa.stderr('ls', ['-l']).then(stdout => stdout.toLowerCase());
execa.stderr('ls', { uid: 1000, gid: 100 }).then(stdout => stdout.toLowerCase());
execa.stderr('ls', ['-l'], { timeout: 5 }).then(stdout => stdout.toLowerCase());
// $ExpectError
execa.stderr(['ls', '-l']);
// $ExpectError
execa.stderr('ls', { foo: 666 });
(execa.shell('ls | wc -l'): ThenableChildProcess);
execa.shell('ls | wc -l').then(printStdout, printErrno);
execa.shell('ls | wc -l', { cwd: '/' }).then(printStdout);
execa.shell('foo').catch(printErrno);
// $ExpectError
execa.shell(['ls', 'wc -l']);
// $ExpectError
execa.stderr('ls', 'wc -l', { foo: 666 });
(execa.sync('ls'): SyncResult);
(execa.sync('ls', ['-l']).stdout: string);
(execa.sync('ls', { stderr: 'pipe' }).signal: ?string);
(execa.sync('ls', ['-l'], { localDir: '~/' }).failed: boolean);
// $ExpectError
execa.sync(['ls']);
// $ExpectError
execa.stderr('ls', { foo: 666 });
// $ExpectError
execa.sync('ls').killed;
// $ExpectError
execa.sync('ls', { input: process.stdin });
(execa.shellSync('ls | wc -l'): SyncResult);
(execa.shellSync('ls | wc -l', { stderr: 'ignore' }).stdout: string);test('main - invalid GitHub repository', async t => {
await t.throwsAsync(
execa.stderr('./cli.js', ['https://github.com/sindresorhus/awesome-lint/blob/master/readme.md']),
/Invalid GitHub repo URL/
);
});assert(error.killed === false);
assert(error.signal === 'SIGINT');
assert(error.stderr === 'stderr');
assert(error.stdout === 'stdout');
assert(error.timedOut === false);
});
execa('noop', ['foo'])
.then(result => result.stderr.toLocaleLowerCase());
execa.stdout('unicorns')
.then(stdout => stdout.toLocaleLowerCase());
execa.stdout('echo', ['unicorns'])
.then(stdout => stdout.toLocaleLowerCase());
execa.stderr('unicorns')
.then(stderr => stderr.toLocaleLowerCase());
execa.stderr('echo', ['unicorns'])
.then(stderr => stderr.toLocaleLowerCase());
execa.shell('echo unicorns')
.then(result => result.stdout.toLocaleLowerCase());
{
let result: string;
result = execa.shellSync('foo').stderr;
result = execa.shellSync('noop', { cwd: 'foo' }).stdout;
result = execa.shellSync('foo').stderr;
result = execa.shellSync('noop foo').stdout;
}assert(error.stderr === 'stderr');
assert(error.stdout === 'stdout');
assert(error.timedOut === false);
});
execa('noop', ['foo'])
.then(result => result.stderr.toLocaleLowerCase());
execa.stdout('unicorns')
.then(stdout => stdout.toLocaleLowerCase());
execa.stdout('echo', ['unicorns'])
.then(stdout => stdout.toLocaleLowerCase());
execa.stderr('unicorns')
.then(stderr => stderr.toLocaleLowerCase());
execa.stderr('echo', ['unicorns'])
.then(stderr => stderr.toLocaleLowerCase());
execa.shell('echo unicorns')
.then(result => result.stdout.toLocaleLowerCase());
{
let result: string;
result = execa.shellSync('foo').stderr;
result = execa.shellSync('noop', { cwd: 'foo' }).stdout;
result = execa.shellSync('foo').stderr;
result = execa.shellSync('noop foo').stdout;
}
execa('echo', ['unicorns']).stdout.pipe(process.stdout);
execa('echo', ['unicorns']).stderr.pipe(process.stderr);async function () {
const done = this.async();
try {
const stats = JSON.parse(await execa.stderr(process.execPath, [
'scripts/functional_test_runner',
...TEST_TAGS.map(tag => `--include-tag=${tag}`),
'--config', 'test/functional/config.js',
'--test-stats'
]));
if (stats.excludedTests.length > 0) {
grunt.fail.fatal(`
${stats.excludedTests.length} tests are excluded by the ciGroup tags, make sure that
all test suites have a "ciGroup{X}" tag and that "tasks/functional_test_groups.js"
knows about the tag that you are using.
tags: ${JSON.stringify({ include: TEST_TAGS })}
- ${stats.excludedTests.join('\n - ')}
`);
