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rOACCT/node_modules/execa/lib/kill.js
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kill.js
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'use strict';
const os = require('os');
const onExit = require('signal-exit');
const DEFAULT_FORCE_KILL_TIMEOUT = 1000 * 5;
// Monkey-patches `childProcess.kill()` to add `forceKillAfterTimeout` behavior
const spawnedKill = (kill, signal = 'SIGTERM', options = {}) => {
const killResult = kill(signal);
setKillTimeout(kill, signal, options, killResult);
return killResult;
};
const setKillTimeout = (kill, signal, options, killResult) => {
if (!shouldForceKill(signal, options, killResult)) {
return;
}
const timeout = getForceKillAfterTimeout(options);
const t = setTimeout(() => {
kill('SIGKILL');
}, timeout);
// Guarded because there's no `.unref()` when `execa` is used in the renderer
// process in Electron. This cannot be tested since we don't run tests in
// Electron.
// istanbul ignore else
if (t.unref) {
t.unref();
}
};
const shouldForceKill = (signal, {forceKillAfterTimeout}, killResult) => {
return isSigterm(signal) && forceKillAfterTimeout !== false && killResult;
};
const isSigterm = signal => {
return signal === os.constants.signals.SIGTERM ||
(typeof signal === 'string' && signal.toUpperCase() === 'SIGTERM');
};
const getForceKillAfterTimeout = ({forceKillAfterTimeout = true}) => {
if (forceKillAfterTimeout === true) {
return DEFAULT_FORCE_KILL_TIMEOUT;
}
if (!Number.isFinite(forceKillAfterTimeout) || forceKillAfterTimeout < 0) {
throw new TypeError(`Expected the \`forceKillAfterTimeout\` option to be a non-negative integer, got \`${forceKillAfterTimeout}\` (${typeof forceKillAfterTimeout})`);
}
return forceKillAfterTimeout;
};
// `childProcess.cancel()`
const spawnedCancel = (spawned, context) => {
const killResult = spawned.kill();
if (killResult) {
context.isCanceled = true;
}
};
const timeoutKill = (spawned, signal, reject) => {
spawned.kill(signal);
reject(Object.assign(new Error('Timed out'), {timedOut: true, signal}));
};
// `timeout` option handling
const setupTimeout = (spawned, {timeout, killSignal = 'SIGTERM'}, spawnedPromise) => {
if (timeout === 0 || timeout === undefined) {
return spawnedPromise;
}
if (!Number.isFinite(timeout) || timeout < 0) {
throw new TypeError(`Expected the \`timeout\` option to be a non-negative integer, got \`${timeout}\` (${typeof timeout})`);
}
let timeoutId;
const timeoutPromise = new Promise((resolve, reject) => {
timeoutId = setTimeout(() => {
timeoutKill(spawned, killSignal, reject);
}, timeout);
});
const safeSpawnedPromise = spawnedPromise.finally(() => {
clearTimeout(timeoutId);
});
return Promise.race([timeoutPromise, safeSpawnedPromise]);
};
// `cleanup` option handling
const setExitHandler = async (spawned, {cleanup, detached}, timedPromise) => {
if (!cleanup || detached) {
return timedPromise;
}
const removeExitHandler = onExit(() => {
spawned.kill();
});
return timedPromise.finally(() => {
removeExitHandler();
});
};
module.exports = {
spawnedKill,
spawnedCancel,
setupTimeout,
setExitHandler
};
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