This change allows operators to specify a DOCKER_BIN environment variable. This will specify a binary to run when executing docker, which is useful in cases where the 'docker' command being run must be modified in a way that would otherwise be invasive to Dokku, but minimalistic if done within a wrapper.
While I do not agree with _every_ style change, this will force Dokku to have consistent formatting across all shell scripts, which is arguably a Good Thing™.
The command used to reprocess everything is:
```shell
shfmt -l -bn -ci -i 2 -w .
```
This will allow us to kill stale proxy configuration within apps, which is critical during application renames.
- redirect rmdir output to dev-null
- trigger a proxy-clear-config (new trigger) when renaming an application
- The configuration will be rebuilt during the later `ps_rebuild`
Closes#3231
This allows users to quickly show the state of any configured application, as well as the state of their server. In doing so, we make it easy for them to provide information necessary for debugging in a single command.
Unlocking an app will not stop running deploys, so users may need to clean up. However, it is useful for deploys that fail in unusual ways that cause the lock to stay around.
Closes#2883
Application cloning can be used to setup review applications based on an existing application. This is useful in CI/CD pipelines where a developer may wish to verify code in a custom environment without overwriting a shared staging environment.
Since they are separate resources, triggering the normal app creation flow makes the most sense.
We still remove the cache directory because we want the correct cache permissions for the new application.
An application which has not been deployed will not have an image
available, and therefore attempting to remove an (empty) cache directory
will fail. Rather than checking for the image - which we should
still do, as not having an image for a deployed app is an error state -
we should instead only attempt the docker cache removal if the directory
cannot be removed via rmdir.
Closes#2294
