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update-process-env.js
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update-process-env.js
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/** @babel */
import fs from 'fs'
import childProcess from 'child_process'
const ENVIRONMENT_VARIABLES_TO_PRESERVE = new Set([
'NODE_ENV',
'NODE_PATH',
'ATOM_HOME',
'ATOM_DISABLE_SHELLING_OUT_FOR_ENVIRONMENT'
])
const PLATFORMS_KNOWN_TO_WORK = new Set([
'darwin',
'linux'
])
async function updateProcessEnv (launchEnv) {
let envToAssign
if (launchEnv) {
if (shouldGetEnvFromShell(launchEnv)) {
envToAssign = await getEnvFromShell(launchEnv)
} else if (launchEnv.PWD) {
envToAssign = launchEnv
}
}
if (envToAssign) {
for (let key in process.env) {
if (!ENVIRONMENT_VARIABLES_TO_PRESERVE.has(key)) {
delete process.env[key]
}
}
for (let key in envToAssign) {
if (!ENVIRONMENT_VARIABLES_TO_PRESERVE.has(key) || (!process.env[key] && envToAssign[key])) {
process.env[key] = envToAssign[key]
}
}
if (envToAssign.ATOM_HOME && fs.existsSync(envToAssign.ATOM_HOME)) {
process.env.ATOM_HOME = envToAssign.ATOM_HOME
}
}
}
function shouldGetEnvFromShell (env) {
if (!PLATFORMS_KNOWN_TO_WORK.has(process.platform)) {
return false
}
if (!env || !env.SHELL || env.SHELL.trim() === '') {
return false
}
if (env.ATOM_DISABLE_SHELLING_OUT_FOR_ENVIRONMENT || process.env.ATOM_DISABLE_SHELLING_OUT_FOR_ENVIRONMENT) {
return false
}
return true
}
async function getEnvFromShell (env) {
let {stdout, error} = await new Promise((resolve) => {
let child
let error
let stdout = ''
let done = false
const cleanup = () => {
if (!done && child) {
child.kill()
done = true
}
}
process.once('exit', cleanup)
setTimeout(() => {
cleanup()
}, 5000)
child = childProcess.spawn(env.SHELL, ['-ilc', 'command env'], {encoding: 'utf8', detached: true, stdio: ['ignore', 'pipe', process.stderr]})
const buffers = []
child.on('error', (e) => {
done = true
error = e
})
child.stdout.on('data', (data) => {
buffers.push(data)
})
child.on('close', (code, signal) => {
done = true
process.removeListener('exit', cleanup)
if (buffers.length) {
stdout = Buffer.concat(buffers).toString('utf8')
}
resolve({stdout, error})
})
})
if (error) {
if (error.handle) {
error.handle()
}
console.log('warning: ' + env.SHELL + ' -ilc "command env" failed with signal (' + error.signal + ')')
console.log(error)
}
if (!stdout || stdout.trim() === '') {
return null
}
let result = {}
for (let line of stdout.split('\n')) {
if (line.includes('=')) {
let components = line.split('=')
let key = components.shift()
let value = components.join('=')
result[key] = value
}
}
return result
}
export default { updateProcessEnv, shouldGetEnvFromShell }