# container-update-checker
[![status-badge](https://woodpecker.narvas.tech/api/badges/vista/container-update-checker/status.svg)](https://woodpecker.narvas.tech/vista/container-update-checker)

check if a container needs rebuilding  

## Environment variables
| Name            | Requered                        | Comment 
|-----------------|---------------------------------|---------
| BASE            | Yes                             | the image the Dockerfile is based on
| TARGET          | Yes                             | the image thats based of `$BASE`
| DOCKER_USERNAME | No<br>*used for private images* | the username for logging in into docker hub
| DOCKER_PASSWORD | No<br>*used for private images* | the password for logging in into docker hub<br>(*you probaly want to use a token here*)

## Exit codes

| State                           | Exit code | Comment
|---------------------------------|-----------|--------
| BASE is more recent than TARGET | 0         | An update is needed
| TARGET is more recent than BASE | 1         | No update is needed<br>(*the pipeline wil "fail" but that is wat we want* )
| An error occured                | 0         | So the pipeline can continue