Refactor __yay_rebuild and __yay_try functions to improve experimental features handling and command execution

functions/__yay_rebuild.fish

@@ -21,21 +21,23 @@ function __yay_rebuild
     set orig (pwd)
     cd $flake_path
 
-    # Base command
-    set -l cmd "nh os switch . -H $host -- --impure"
+    # Build the nh command
+    set -l nh_cmd "nh os switch . -H $host -- --impure"
     
     # Add trace if requested
     if set -q _flag_trace
-        set cmd "$cmd --show-trace"
+        set nh_cmd "$nh_cmd --show-trace"
     end
 
-    # Add experimental features if requested
+    # Choose execution method based on experimental flag
     if set -q _flag_experimental
-        set cmd "$cmd --extra-experimental-features flakes --extra-experimental-features nix-command"
+        # Run nh inside a shell with experimental features
+        set -l shell_cmd "nix shell nixpkgs#nh --extra-experimental-features \"nix-command flakes\" -c fish -c \"$nh_cmd\""
+        __yay_run $shell_cmd
+    else
+        # Run nh directly
+        __yay_run $nh_cmd
     end
 
-    # Run the command
-    __yay_run $cmd
-
     cd $orig
 end

functions/__yay_try.fish

@@ -1,40 +1,45 @@
 function __yay_try
     set -l all_args $argv
     
-    set -l opts h/help
-    argparse $opts -- $all_args; or return
+    # Find -- separator before argparse to avoid argparse consuming it
+    set -l sep_index (contains --index -- '--' $all_args)
+    set -l args_before_sep $all_args
+    set -l cmd_after_sep
     
-    if set -q _flag_help; or test (count $all_args) -eq 0
-        echo "Usage: yay try PACKAGE [PACKAGE...] [-- COMMAND [ARGS...]]"
-        echo "  -h, --help  Show this help message"
+    if test $status -eq 0  # Found '--' separator
+        if test $sep_index -gt 1
+            set args_before_sep $all_args[1..(math $sep_index - 1)]
+        else
+            set args_before_sep # empty if -- is first
+        end
+        
+        if test $sep_index -lt (count $all_args)
+            set cmd_after_sep $all_args[(math $sep_index + 1)..-1]
+        end
+    end
+
+    # Now parse only the arguments before --
+    set -l opts h/help e/experimental
+    argparse $opts -- $args_before_sep; or return
+
+    if set -q _flag_help; or test (count $args_before_sep) -eq 0 -a (count $cmd_after_sep) -eq 0
+        echo "Usage: yay try [OPTIONS] PACKAGE [PACKAGE...] [-- COMMAND [ARGS...]]"
+        echo "  -e, --experimental  Enable experimental features (nix-command flakes)"
+        echo "  -h, --help         Show this help message"
         return
     end
 
-    # Initialize variables in function scope
-    set -l pkgs
+    # $argv now contains only the packages (after argparse removed flags)
+    set -l pkgs $argv
+    
+    # Build command string from cmd_after_sep
     set -l cmd_str
-    set -l sep_index (contains --index -- '--' $all_args)
-
-    if test $status -eq 0  # Found '--' separator
-        # Extract packages before '--'
-        if test $sep_index -gt 1
-            set pkgs $all_args[1..(math $sep_index - 1)]
+    if test (count $cmd_after_sep) -gt 0
+        set -l escaped_cmd
+        for arg in $cmd_after_sep
+            set escaped_cmd $escaped_cmd (string escape -- "$arg")
         end
-
-        # Extract and escape command after '--'
-        if test $sep_index -lt (count $all_args)
-            set -l raw_cmd $all_args[(math $sep_index + 1)..-1]
-            set -l escaped_cmd
-            for arg in $raw_cmd
-                set escaped_cmd $escaped_cmd (string escape -- "$arg")
-            end
-            set cmd_str (string join ' ' -- $escaped_cmd)
-        else
-            echo "Error: no command specified after --" >&2
-            return 1
-        end
-    else  # No '--' found
-        set pkgs $all_args
+        set cmd_str (string join ' ' -- $escaped_cmd)
     end
 
     if test (count $pkgs) -eq 0
@@ -45,11 +50,24 @@ function __yay_try
     __yay_green "««« CREATING NIX SHELL »»»"
     __yay_yellow "Loading packages: $pkgs"
 
-    set -l pkg_str (string join ' ' -- $pkgs)
+    # Build the base command
+    set -l base_cmd "nix shell"
+    
+    if set -q _flag_experimental
+        set base_cmd "$base_cmd --extra-experimental-features \"nix-command flakes\""
+    end
+
+    # Convert package names to nixpkgs# format
+    set -l nix_pkgs
+    for pkg in $pkgs
+        set nix_pkgs $nix_pkgs "nixpkgs#$pkg"
+    end
+    set -l pkg_str (string join ' ' -- $nix_pkgs)
+
     if test -n "$cmd_str"
         __yay_yellow "Running: $cmd_str"
-        __yay_run "nix-shell -p $pkg_str --run \"$cmd_str\""
+        __yay_run "$base_cmd $pkg_str -c fish -c \"$cmd_str\""
     else
-        __yay_run "nix-shell -p $pkg_str --command fish"
+        __yay_run "$base_cmd $pkg_str -c fish"
     end
 end