docs(agent): added agent configuration docs

docs/content/configuration.md

@@ -17,7 +17,7 @@ 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**  
+**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.
@@ -97,3 +97,25 @@ configuration variable required for each command.
   build`.
     * Default: `archlinux:base-devel`
 
+### `vieter agent`
+
+* `log_level`: log verbosity level. Value should be one of `FATAL`, `ERROR`,
+  `WARN`, `INFO` or `DEBUG`.
+    * Default: `WARN`
+* `address`: *public* URL of the Vieter repository server to build for. From
+  this server jobs are 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.
+* `max_concurrent_builds`: how many builds to run at the same time.
+    * Default: `1`
+* `polling_frequency`: how often (in seconds) to poll the server for new
+  builds. Note that the agent might poll more frequently when it's actively
+  processing builds.
+* `image_rebuild_frequency`: Vieter periodically builds images that are then
+  used as a basis for running build containers. This is to prevent each build
+  from downloading an entire repository worth of dependencies. This setting
+  defines how frequently (in minutes) to rebuild these images.
+    * Default: `1440` (every 24 hours)
+* `arch`: architecture for which this agent should pull down builds (e.g.
+  `x86_64`)

docs/content/installation.md

@@ -21,7 +21,7 @@ branch. This branch will be the most up to date, but does not give any
 guarantees about stability, so beware!
 
 Thanks to the single-binary design of Vieter, this image can be used both for
-the repository server & the cron daemon.
+the repository server, the cron daemon and the agent.
 
 Below is an example compose file to set up both the repository server & the
 cron daemon:
@@ -76,7 +76,7 @@ architectures will build on both.
 ## Binary
 
 On the
-[releases](https://git.rustybever.be/vieter/vieter/releases)
+[releases](https://git.rustybever.be/vieter-v/vieter/releases)
 page, you can find statically compiled binaries for all
 released versions. This is the same binary as used inside
 the Docker images.
@@ -106,5 +106,5 @@ guarantee that a compiler update won't temporarily break them.
 
 ## Building from source
 
-The project [README](https://git.rustybever.be/vieter/vieter#building) contains
+The project [README](https://git.rustybever.be/vieter-v/vieter#building)
-instructions for building Vieter from source.
+contains instructions for building Vieter from source.

docs/content/usage/builds/schedule.md

@@ -37,6 +37,6 @@ Each section can consist of as many of these parts as necessary.
 ## CLI tool
 
 The Vieter binary contains a command that shows you the next matching times for
-a given expression. This can be useful to understand the syntax. For more
+a given expression. This can be useful for understanding the syntax. For more
 information, see
 [vieter-schedule(1)](https://rustybever.be/man/vieter/vieter-schedule.1.html).

src/agent/daemon.v

@@ -32,7 +32,7 @@ fn agent_init(logger log.Log, conf Config) AgentDaemon {
 		logger: logger
 		client: client.new(conf.address, conf.api_key)
 		conf: conf
-		images: new_image_manager(conf.image_rebuild_frequency)
+		images: new_image_manager(conf.image_rebuild_frequency * 60)
 		builds: []BuildConfig{len: conf.max_concurrent_builds}
 		atomics: []u64{len: conf.max_concurrent_builds}
 	}