Added some documentation; ran format

src/build.v

@@ -11,7 +11,9 @@ import git
 const container_build_dir = '/build'
 
 fn build(key string, repo_dir string) ? {
-	server_url := os.getenv_opt('VIETER_ADDRESS') or { exit_with_message(1, 'No Vieter server address was provided.') }
+	server_url := os.getenv_opt('VIETER_ADDRESS') or {
+		exit_with_message(1, 'No Vieter server address was provided.')
+	}
 
 	// Read in the repos from a json file
 	filename := os.join_path_single(repo_dir, 'repos.json')
@@ -22,14 +24,14 @@ fn build(key string, repo_dir string) ? {
 		// Update repos & install required packages
 		'pacman -Syu --needed --noconfirm base-devel git'
 		// Add a non-root user to run makepkg
-		'groupadd -g 1000 builder'
+		'groupadd -g 1000 builder',
 		'useradd -mg builder builder'
 		// Make sure they can use sudo without a password
 		"echo 'builder ALL=(ALL) NOPASSWD: ALL' >> /etc/sudoers"
 		// Create the directory for the builds & make it writeable for the
 		// build user
-		'mkdir /build'
-		'chown -R builder:builder /build'
+		'mkdir /build',
+		'chown -R builder:builder /build',
 	]
 
 	// Each repo gets a unique UUID to avoid naming conflicts when cloning

src/docker/containers.v

@@ -8,6 +8,7 @@ struct Container {
 	names []string [json: Names]
 }
 
+// containers returns a list of all currently running containers
 pub fn containers() ?[]Container {
 	res := request('GET', urllib.parse('/containers/json') ?) ?
 
@@ -25,6 +26,8 @@ struct CreatedContainer {
 	id string [json: Id]
 }
 
+// create_container creates a container defined by the given configuration. If
+// successful, it returns the ID of the newly created container.
 pub fn create_container(c &NewContainer) ?string {
 	res := request_with_json('POST', urllib.parse('/containers/create') ?, c) ?
 
@@ -35,6 +38,8 @@ pub fn create_container(c &NewContainer) ?string {
 	return json.decode(CreatedContainer, res.text) ?.id
 }
 
+// start_container starts a container with a given ID. It returns whether the
+// container was started or not.
 pub fn start_container(id string) ?bool {
 	res := request('POST', urllib.parse('/containers/$id/start') ?) ?
 
@@ -51,16 +56,19 @@ pub:
 	running bool [json: Running]
 }
 
+// inspect_container returns the result of inspecting a container with a given
+// ID.
 pub fn inspect_container(id string) ?ContainerInspect {
 	res := request('GET', urllib.parse('/containers/$id/json') ?) ?
 
 	if res.status_code != 200 {
-		return error("Failed to inspect container.")
+		return error('Failed to inspect container.')
 	}
 
-	return json.decode(ContainerInspect, res.text)
+	return json.decode(ContainerInspect, res.text) or {}
 }
 
+// remove_container removes a container with a given ID.
 pub fn remove_container(id string) ?bool {
 	res := request('DELETE', urllib.parse('/containers/$id') ?) ?
 

src/docker/docker.v

@@ -65,7 +65,7 @@ fn send(req &string) ?http.Response {
 }
 
 fn request_with_body(method string, url urllib.URL, content_type string, body string) ?http.Response {
-	req := '$method $url.request_uri() HTTP/1.1\nHost: localhost\nContent-Type: ${content_type}\nContent-Length: $body.len\n\n$body\n\n'
+	req := '$method $url.request_uri() HTTP/1.1\nHost: localhost\nContent-Type: $content_type\nContent-Length: $body.len\n\n$body\n\n'
 
 	return send(req)
 }
@@ -76,12 +76,15 @@ fn request(method string, url urllib.URL) ?http.Response {
 	return send(req)
 }
 
+// request_with_json<T> sends a request to the Docker socket with a given JSON
+// payload
 pub fn request_with_json<T>(method string, url urllib.URL, data &T) ?http.Response {
 	body := json.encode(data)
 
 	return request_with_body(method, url, 'application/json', body)
 }
 
+// pull_image pulls tries to pull the image for the given image & tag
 pub fn pull_image(image string, tag string) ?http.Response {
 	return request('POST', urllib.parse('/images/create?fromImage=$image&tag=$tag') ?)
 }