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# Configuration

By default, all vieter commands try to read in the TOML file `~/.vieterrc` for
configuration. The location of this file can be changed by using the `-f` flag.

If the above file doesn't exist or you wish to override some of its settings,
configuration is also possible using environment variables. Every variable in
the config file has a respective environment variable of the following form:
say the variable is called `api_key`, then the respective environment variable
would be `VIETER_API_KEY`. In essence, it's the variable in uppercase prepended
with `VIETER_`.

If a variable is both present in the config file & as an environment variable,
the value in the environment variable is used.

{{< hint info >}}
**Note**  
All environment variables can also be provided from a file by appending them
with `_FILE`. This for example allows you to provide the API key from a Docker
secrets file.
{{< /hint >}}

## Commands

The first argument passed to Vieter determines which command you wish to use.
Each of these can contain subcommands (e.g. `vieter targets list`), but all
subcommands will use the same configuration. Below you can find the
configuration variable required for each command.

### `vieter server`

* `log_level`: log verbosity level. Value should be one of `FATAL`, `ERROR`,
  `WARN`, `INFO` or `DEBUG`.
    * Default: `WARN`
* `log_file`: log file to write logs to.
    * Default: `vieter.log` (in the current directory)
* `pkg_dir`:  where Vieter should store the actual package archives.
* `data_dir`: where Vieter stores the repositories, log file & database.
* `api_key`: the API key to use when authenticating requests.
* `default_arch`: this setting serves two main purposes:
    * Packages with architecture `any` are always added to this architecture.
      This prevents the server from being confused when an `any` package is
      published as the very first package for a repository.
    * Git repositories added without an `arch` value use this value instead.
* `port`: HTTP port to run on
    * Default: `8000`

### `vieter cron`

* `log_level`: log verbosity level. Value should be one of `FATAL`, `ERROR`,
  `WARN`, `INFO` or `DEBUG`.
    * Default: `WARN`
* `log_file`: log file to write logs to.
    * Default: `vieter.log` (in `data_dir`)
* `address`: *public* URL of the Vieter repository server to build for. From
  this server the list of Git repositories is retrieved. All built packages are
  published to this server.
* `api_key`: API key of the above server.
* `data_dir`: directory to store log file in.
* `base_image`: Docker image to use when building a package. Any Pacman-based
  distro image should work, as long as `/etc/pacman.conf` is used &
  `base-devel` exists in the repositories. Make sure that the image supports
  the architecture of your cron daemon.
    * Default: `archlinux:base-devel` (only works on `x86_64`). If you require
      `aarch64` support, consider using
      [`menci/archlinuxarm:base-devel`](https://hub.docker.com/r/menci/archlinuxarm)
      ([GitHub](https://github.com/Menci/docker-archlinuxarm)). This is the image
      used for the Vieter CI builds.
* `max_concurrent_builds`: how many builds to run at the same time.
    * Default: `1`
* `api_update_frequency`: how frequently (in minutes) to poll the Vieter
  repository server for a new list of Git repositories to build.
    * Default: `15`
* `image_rebuild_frequency`: Vieter periodically builds a builder image using
  the configured base image. This makes sure build containers do not have to
  download a lot of packages when updating their system. This setting defines
  how frequently (in minutes) to rebuild this builder image.
    * Default: `1440` (every 24 hours)
* `global_schedule`: build schedule for any Git repository that does not have a
  schedule defined. For information about this syntax, see
  [here](/usage/builds/schedule).
    * Default: `0 3` (3AM every night)

### `vieter logs`

* `api_key`: the API key to use when authenticating requests.
* `address`: Base URL of your Vieter instance, e.g. https://example.com

### `vieter targets`

* `api_key`: the API key to use when authenticating requests.
* `address`: Base URL of your Vieter instance, e.g. https://example.com
* `base_image`: image to use when building a package using `vieter targets
  build`.
    * Default: `archlinux:base-devel`