Set up the flake repo directory.

src/config/target.rs

@@ -12,16 +12,23 @@ use super::Config;
 pub(crate) struct TargetConfig {
     pub(super) name: String,
 
-    #[serde(default)]
-    pub(super) repo: Option<String>,
+    pub(super) repo: String,
+
     #[serde(default)]
     pub(super) branch: Option<String>,
+
+    #[serde(default)]
+    pub(super) revision: Option<String>,
+
     #[serde(default)]
     pub(super) path: Option<String>,
+
     #[serde(default)]
     pub(super) attr: Option<String>,
+
     #[serde(default)]
     pub(super) update: Option<bool>,
+
     #[serde(default)]
     pub(super) update_branch: Option<String>,
 }
@@ -42,4 +49,20 @@ impl TargetConfig {
         let target_directory = self.get_target_directory(config_root)?;
         Ok(Cow::Owned(target_directory.join("flake")))
     }
+
+    pub(crate) fn get_repo(&'_ self) -> Result<&String, CustomError> {
+        Ok(&self.repo)
+    }
+
+    pub(crate) fn get_branch(&'_ self) -> Result<Cow<'_, str>, CustomError> {
+        if let Some(b) = &self.branch {
+            Ok(Cow::Borrowed(b))
+        } else {
+            Ok(Cow::Borrowed("main"))
+        }
+    }
+
+    pub(crate) fn get_revision(&self) -> Result<&Option<String>, CustomError> {
+        Ok(&self.revision)
+    }
 }