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# @npmcli/ci-detect
Detect what kind of CI environment the program is in
[](https://travis-ci.com/npm/ci-detect)
[](https://coveralls.io/github/npm/ci-detect?branch=master)
## USAGE
```js
const ciDetect = require('@npmcli/ci-detect')
// false if not in CI
// otherwise, a string indicating the CI environment type
const inCI = ciDetect()
```
## CIs Detected
Returns one of the following strings, or `false` if none match, by looking
at the appropriate environment variables.
* `'gerrit'` Gerrit
* `'gitlab'` GitLab
* `'circleci'` Circle-CI
* `'semaphore'` Semaphore
* `'drone'` Drone
* `'github-actions'` GitHub Actions
* `'tddium'` TDDium
* `'jenkins'` Jenkins
* `'bamboo'` Bamboo
* `'gocd'` GoCD
* `'wercker'` Oracle Wercker
* `'netlify'` Netlify
* `'now-github'` Zeit.co's Now for GitHub deployment service
* `'now-bitbucket'` Zeit.co's Now for BitBucket deployment service
* `'now-gitlab'` Zeit.co's Now for GitLab deployment service
* `'codeship'` CodeShip
* Anything that sets the `CI_NAME` environment variable will return the
value as the result. (This is how CodeShip is detected.)
* `'travis-ci'` Travis-CI - A few other CI systems set `TRAVIS=1` in the
environment, because devs use that to indicate "test mode", so this one
can get some false positives, and is tested later in the process to
minimize this effect.
* `'aws-codebuild'` AWS CodeBuild
* `'builder'` Google Cloud Builder - This one is a bit weird. It doesn't
really set anything that can be reliably detected except
`BUILDER_OUTPUT`, so it can get false positives pretty easily.
* `'custom'` anything else that sets `CI` environment variable to either
`'1'` or `'true'`.
## Caveats
Note that since any program can set or unset whatever environment variables
they want, this is not 100% reliable.
Also, note that if your program does different behavior in
CI/test/deployment than other places, then there's a good chance that
you're doing something wrong!
But, for little niceties like setting colors or other output parameters, or
logging and that sort of non-essential thing, this module provides a way to
tweak without checking a bunch of things in a bunch of places. Mostly,
it's a single place to keep a note of what CI system sets which environment
variable.
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