FIXME

src/flake.rs

@@ -0,0 +1,28 @@
+use std::fmt;
+
+#[derive(Debug)]
+enum Installable {
+    Flake(FlakeInstallable),
+}
+
+impl fmt::Display for Installable {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Installable::Flake(flake) => {
+                write!(f, "{}", flake.reference)?;
+
+                if !flake.attribute.is_empty() {
+                    write!(f, "#")?;
+                }
+            }
+        }
+
+        Ok(())
+    }
+}
+
+#[derive(Debug)]
+struct FlakeInstallable {
+    reference: String,
+    attribute: Vec<String>,
+}

src/main.rs

@@ -1,6 +1,7 @@
 mod clean;
 mod commands;
 mod completion;
+mod flake;
 mod home;
 mod interface;
 mod json;