/
execute.js
127 lines (107 loc) · 2.9 KB
/
execute.js
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let path = require('path')
let { spawn } = require('child_process')
let resolveToolRoot = require('./resolve-tool-root')
let runningProcessess = []
afterEach(() => {
runningProcessess.splice(0).forEach((runningProcess) => runningProcess.stop())
})
function debounce(fn, ms) {
let state = { timer: undefined }
return (...args) => {
if (state.timer) clearTimeout(state.timer)
state.timer = setTimeout(() => fn(...args), ms)
}
}
module.exports = function $(command, options = {}) {
let abortController = new AbortController()
let cwd = resolveToolRoot()
let args = options.shell
? [command]
: (() => {
let args = command.split(' ')
command = args.shift()
command = command === 'node' ? command : path.resolve(cwd, 'node_modules', '.bin', command)
return [command, args]
})()
let stdoutMessages = []
let stderrMessages = []
let stdoutActors = []
let stderrActors = []
function notifyNext(actors, messages) {
if (actors.length <= 0) return
let [next] = actors
for (let [idx, message] of messages.entries()) {
if (next.predicate(message)) {
messages.splice(0, idx + 1)
let actorIdx = actors.indexOf(next)
actors.splice(actorIdx, 1)
next.resolve()
break
}
}
}
let notifyNextStdoutActor = debounce(() => {
return notifyNext(stdoutActors, stdoutMessages)
}, 200)
let notifyNextStderrActor = debounce(() => {
return notifyNext(stderrActors, stderrMessages)
}, 200)
let runningProcess = new Promise((resolve, reject) => {
let child = spawn(...args, {
...options,
env: {
...process.env,
...options.env,
},
signal: abortController.signal,
cwd,
})
let stdout = ''
let stderr = ''
let combined = ''
child.stdout.on('data', (data) => {
stdoutMessages.push(data.toString())
notifyNextStdoutActor()
stdout += data
combined += data
})
child.stderr.on('data', (data) => {
stderrMessages.push(data.toString())
notifyNextStderrActor()
stderr += data
combined += data
})
child.on('error', (err) => {
if (err.name !== 'AbortError') {
throw err
}
})
child.on('close', (code, signal) => {
;(signal === 'SIGTERM' ? resolve : code === 0 ? resolve : reject)({
code,
stdout,
stderr,
combined,
})
})
})
runningProcessess.push(runningProcess)
return Object.assign(runningProcess, {
stop() {
abortController.abort()
return runningProcess
},
onStdout(predicate) {
return new Promise((resolve) => {
stdoutActors.push({ predicate, resolve })
notifyNextStdoutActor()
})
},
onStderr(predicate) {
return new Promise((resolve) => {
stderrActors.push({ predicate, resolve })
notifyNextStderrActor()
})
},
})
}