Complete recipe names in fish completion script (#625)

completions/just.fish

@@ -1,3 +1,14 @@
+function __fish_just_complete_recipes
+    just --summary 2> /dev/null | tr " " "\n" || echo ""
+end
+
+# don't suggest files right off
+complete -c just -n "__fish_is_first_arg" --no-files
+
+# complete recipes
+complete -c just -a '(__fish_just_complete_recipes)'
+
+# autogenerated completions
 complete -c just -n "__fish_use_subcommand" -l color -d 'Print colorful output' -r -f -a "auto always never"
 complete -c just -n "__fish_use_subcommand" -s f -l justfile -d 'Use <JUSTFILE> as justfile.'
 complete -c just -n "__fish_use_subcommand" -l set -d 'Override <VARIABLE> with <VALUE>'

src/subcommand.rs

@@ -23,6 +23,19 @@ pub(crate) enum Subcommand {
   Variables,
 }
 
+const FISH_RECIPE_COMPLETIONS: &str = r#"function __fish_just_complete_recipes
+    just --summary 2> /dev/null | tr " " "\n" || echo ""
+end
+
+# don't suggest files right off
+complete -c just -n "__fish_is_first_arg" --no-files
+
+# complete recipes
+complete -c just -a '(__fish_just_complete_recipes)'
+
+# autogenerated completions
+"#;
+
 const ZSH_COMPLETION_REPLACEMENTS: &[(&str, &str)] = &[
   (
     r#"    _arguments "${_arguments_options[@]}" \"#,
@@ -127,6 +140,10 @@ impl Subcommand {
       }
     }
 
+    if let clap::Shell::Fish = shell {
+      script.insert_str(0, FISH_RECIPE_COMPLETIONS);
+    }
+
     println!("{}", script.trim());
 
     Ok(())