- Environments can have checks, that are run before the service’s
checks.
- Directories can now be checked as well as files.
- Failing checks now stop the start process with a Service::Exception.
- Some variable substitution is done in check commands and tests.
- Some environment variables related to the environment to run the
service in are also exported.
- `start` and `stop` now take service ids in parameter and can take
multiple of them.
- Errors are displayed properly (instead of “index out of bounds” or
“nil assertion failed”) when invalid ids are provided on the CLI for
`start` and `stop`.
- Were tested for `start` and seem to work fine with them.
- `stop` still ignores them compteley at the moment. We’ll need to
remember what has been started as a dependency and what has not to
make `stop` work with reverse-dependency-trees.
