Run nix build.

src/command/build/runner.rs

@@ -6,6 +6,7 @@ use crate::fs_util::assert_directory;
 use crate::fs_util::is_git_repo;
 use crate::git_util::git_force_into_state;
 use crate::git_util::git_init_at_rev;
+use crate::nix_util::nixos_build_target;
 
 pub(crate) async fn run_build(args: BuildArgs) -> Result<(), CustomError> {
     println!("{:?}", args);
@@ -23,6 +24,7 @@ pub(crate) async fn run_build(args: BuildArgs) -> Result<(), CustomError> {
         };
 
         prepare_flake_repo(&config, target_config).await?;
+        build_target(&config, target_config).await?;
     }
 
     Ok(())
@@ -32,17 +34,17 @@ async fn prepare_flake_repo(
     config_root: &Config,
     target_config: &TargetConfig,
 ) -> Result<(), CustomError> {
-    let flake_directory = target_config.get_flake_directory(config_root)?;
+    let repo_directory = target_config.get_repo_directory(config_root)?;
     assert_directory!(
-        &flake_directory,
-        "Creating flake directory {}",
-        (&flake_directory).to_string_lossy()
+        &repo_directory,
+        "Creating repo directory {}",
+        (&repo_directory).to_string_lossy()
     );
 
-    if is_git_repo(&flake_directory).await? {
+    if is_git_repo(&repo_directory).await? {
         // Clean up the existing clone
         git_force_into_state(
-            &flake_directory,
+            &repo_directory,
             target_config.get_branch()?,
             "origin",
             target_config.get_repo()?,
@@ -51,7 +53,7 @@ async fn prepare_flake_repo(
         .await?;
     } else {
         git_init_at_rev(
-            &flake_directory,
+            &repo_directory,
             target_config.get_branch()?,
             target_config.get_repo()?,
             target_config.get_revision()?,
@@ -60,3 +62,20 @@ async fn prepare_flake_repo(
     }
     Ok(())
 }
+
+async fn build_target(
+    config_root: &Config,
+    target_config: &TargetConfig,
+) -> Result<(), CustomError> {
+    let flake_directory = target_config.get_flake_directory(config_root)?;
+    let build_directory = target_config.get_build_directory(config_root)?;
+    assert_directory!(
+        &build_directory,
+        "Creating build directory {}",
+        (&build_directory).to_string_lossy()
+    );
+
+    nixos_build_target(build_directory, flake_directory, target_config.get_attr()?).await?;
+
+    Ok(())
+}