List recipes by group in group justfile order with just --list --unsorted (#2164)

src/subcommand.rs

@@ -500,7 +500,17 @@ impl Subcommand {
       groups
     };
 
-    for (i, (group, recipes)) in groups.iter().enumerate() {
+    let mut ordered = module
+      .public_groups(config)
+      .into_iter()
+      .map(Some)
+      .collect::<Vec<Option<String>>>();
+
+    if groups.contains_key(&None) {
+      ordered.insert(0, None);
+    }
+
+    for (i, group) in ordered.into_iter().enumerate() {
       if i > 0 {
         println!();
       }
@@ -509,14 +519,14 @@ impl Subcommand {
 
       if !no_groups {
         print!("{list_prefix}");
-        if let Some(group_name) = group {
-          println!("[{group_name}]");
+        if let Some(group) = &group {
+          println!("[{group}]");
         } else {
           println!("(no group)");
         }
       }
 
-      for recipe in recipes {
+      for recipe in groups.get(&group).unwrap() {
         for (i, name) in iter::once(&recipe.name())
           .chain(aliases.get(recipe.name()).unwrap_or(&Vec::new()))
           .enumerate()

tests/groups.rs

@@ -96,6 +96,47 @@ fn list_with_groups_unsorted() {
     .run();
 }
 
+#[test]
+fn list_with_groups_unsorted_group_order() {
+  Test::new()
+    .justfile(
+      "
+        [group('y')]
+        [group('x')]
+        f:
+
+        [group('b')]
+        b:
+
+        [group('a')]
+        e:
+
+        c:
+      ",
+    )
+    .args(["--list", "--unsorted"])
+    .stdout(
+      "
+        Available recipes:
+            (no group)
+            c
+
+            [x]
+            f
+
+            [y]
+            f
+
+            [b]
+            b
+
+            [a]
+            e
+      ",
+    )
+    .run();
+}
+
 #[test]
 fn list_groups() {
   Test::new()