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<title>Code coverage report for lib/tail-until.js</title>
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<a href="../index.html">All files</a> / <a href="index.html">lib</a> tail-until.js
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">import { SubProcess } from 'teen_process';
import B from 'bluebird';
import log from './logger';
// tails a file, promise resolves when input string is written to file
async function tailUntil (filePath, until, timeout = <span class="branch-0 cbranch-no" title="branch not covered" >5000)</span> {
let proc = new SubProcess('tail', ['-f', '-n', '100', filePath]);
// // for debugging
// function consoleOut (...args) {
// console.log(`>>> ${args}`); // eslint-disable-line no-console
// }
// proc.on('output', consoleOut);
let startDetector = (stdout) => {
return stdout.indexOf(until) > -1;
};
return await new B((resolve, reject) => {
let started = proc.start(startDetector);
/* eslint-disable promise/prefer-await-to-then */
let timedout = B.delay(timeout).then(() => {
return reject(new Error(`Tailing file ${filePath} failed after ${timeout}ms`));
});
/* eslint-enable */
B.race([started, timedout]).then(resolve).catch(reject);
}).finally(async () => {
// no matter what, stop the tail process
if (proc.isRunning) {
try {
await proc.stop();
} catch (err) {
// there is not much we can do here, unfortunately, but log
<span class="cstat-no" title="statement not covered" > log.info(`Stopping tail process failed: ${err.message}`);</span>
}
}
});
}
export { tailUntil };
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Code coverage
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