1 files changed, 10 insertions, 0 deletions
diff --git a/src/cmd/cloud_init.rs b/src/cmd/cloud_init.rs
index a9b3588..b266eb4 100644
--- a/src/cmd/cloud_init.rs
+++ b/src/cmd/cloud_init.rs
@@ -1,17 +1,27 @@
+//! The `cloud-init` sub-command.
+
 use crate::cloudinit::{CloudInitConfig, CloudInitError};
 use crate::spec::Specification;
 use log::{debug, info};
 use std::path::Path;
 
+/// Errors from this module.
 #[derive(Debug, thiserror::Error)]
 pub enum CloudInitCommandError {
+    /// Error in the cloud-init configuration.
     #[error(transparent)]
     CloudInitError(#[from] CloudInitError),
 
+    /// Error doing I/O.
     #[error(transparent)]
     IoError(#[from] std::io::Error),
 }
 
+/// The `cloud-init` sub-command.
+///
+/// This sub-command generates the cloud-init configuration based on
+/// specifications provided by the caller and writes them to files in
+/// a directory named by the caller.
 pub fn cloud_init(specs: &[Specification], dirname: &Path) -> Result<(), CloudInitCommandError> {
     for spec in specs {
         let dirname = dirname.join(&spec.name);