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import fs from 'node:fs';
let isDockerCached;
function hasDockerEnv() {
try {
fs.statSync('/.dockerenv');
return true;
} catch {
return false;
}
}
function hasDockerCGroup() {
try {
return fs.readFileSync('/proc/self/cgroup', 'utf8').includes('docker');
} catch {
return false;
}
}
export default function isDocker() {
// TODO: Use `??=` when targeting Node.js 16.
if (isDockerCached === undefined) {
isDockerCached = hasDockerEnv() || hasDockerCGroup();
}
return isDockerCached;
}