feat(base): preview files when using f alias

modules/profiles/base.nix

@@ -45,7 +45,7 @@ in
         mv = "mv -i";
         cd = "z";
 
-        f = "fzf --multi --bind \"enter:become($EDITOR {+})\"";
+        f = ''fzf --multi --bind "enter:become($EDITOR {+})" --preview "bat --color=always --style=header,grid --line-range :500 {+}"'';
 
         nixos-switch = nom-system-command "sudo nixos-rebuild switch --flake ~/.dotfiles";
         nixos-boot = nom-system-command "sudo nixos-rebuild boot --flake ~/.dotfiles";
@@ -154,6 +154,7 @@ in
         enable = true;
         defaultOptions = [
           "--height 50%"
+          "--bind alt-j:preview-down,alt-k:preview-up"
         ];
       };
       zoxide.enable = true;

modules/programs/tmux/default.nix

@@ -41,32 +41,18 @@ let
     '';
   };
 
-  tmux-sessionizer = pkgs.writeShellApplication {
+  tmux-sessionizer = pkgs.writeFishApplication {
     name = "ts";
-    runtimeInputs = with pkgs; [ tmux findutils coreutils procps fd fzf ];
-    text = ''
-      #!/usr/bin/env bash
-
-      selected=$(fd -HIg '.git' ~/ --min-depth 1 --max-depth 5 --type d --prune --exec dirname {} | ${getExe fzf1} "$*")
-
-      selected_name=$(basename "$selected" | tr . _)
-
-      if ! tmux has-session -t="$selected_name" 2> /dev/null; then
-        tmux new-session -ds "$selected_name" -c "$selected"
-      fi
-
-      ${getExe tmux-switch} "$selected_name"
-    '';
+    runtimeInputs = with pkgs; [ tmux findutils coreutils procps fd fzf1 tmux-switch ];
+    text = readFile ./tmux-sessionizer/script.fish;
+    completions = readFile ./tmux-sessionizer/completions.fish;
   };
 
-  tmux-attach = pkgs.writeShellApplication {
+  tmux-attach = pkgs.writeFishApplication {
     name = "ta";
-    runtimeInputs = with pkgs; [ tmux ];
-    text = ''
-      #!/usr/bin/env bash
-      selected=$(tmux list-sessions -F '#{session_name}' | ${getExe fzf1} "$*")
-      ${getExe tmux-switch} "$selected"
-    '';
+    runtimeInputs = with pkgs; [ tmux fzf1 tmux-switch ];
+    text = readFile ./tmux-attach/script.fish;
+    completions = readFile ./tmux-attach/completions.fish;
   };
 
 in

modules/programs/tmux/tmux-attach/completions.fish

@@ -0,0 +1 @@
+complete -c ta -f -a '(tmux list-sessions -F "#{session_name}" 2>/dev/null)'

modules/programs/tmux/tmux-attach/script.fish

@@ -0,0 +1,5 @@
+set selected (tmux list-sessions -F '#{session_name}' 2>/dev/null | fzf1 $argv)
+if not test -n "$selected"
+  exit 1
+end
+tmux-switch "$selected"

modules/programs/tmux/tmux-sessionizer/completions.fish

@@ -0,0 +1 @@
+complete -c ts -f -a '(fd -HIg '.git' ~/ --min-depth 1 --max-depth 5 --type d --prune --exec realpath "{}/.." | xargs -I{} basename {} | string replace "." "")'

modules/programs/tmux/tmux-sessionizer/script.fish

@@ -0,0 +1,13 @@
+set selected (fd -HIg '.git' ~/ --min-depth 1 --max-depth 5 --type d --prune --exec dirname {} | fzf1 $argv)
+
+set selected_name (basename $selected 2>/dev/null | string replace "." "_")
+
+if not test -n "$selected_name"
+  exit 1
+end
+
+if ! tmux has-session -t $selected_name 2> /dev/null
+  tmux new-session -ds $selected_name -c $selected
+end
+
+tmux-switch $selected_name

overlays/builders.nix

@@ -0,0 +1,49 @@
+_:
+
+final: _:
+with final.lib;
+{
+  writeFishApplication =
+    { name
+    , text
+    , completions ? null
+    , runtimeInputs ? [ ]
+    , checkPhase ? null
+    }:
+    let
+      fishFile = destination: content: final.writeTextFile {
+        inherit name destination;
+        executable = true;
+        allowSubstitutes = true;
+        preferLocalBuild = false;
+        text = ''
+          #!${getExe final.fish}
+        '' + optionalString (runtimeInputs != [ ]) ''
+
+        export PATH="${makeBinPath runtimeInputs}:$PATH"
+      '' + ''
+
+        ${content}
+      '';
+
+        checkPhase =
+          if checkPhase == null then ''
+            runHook preCheck
+            ${getExe final.fish} -n "$target"
+            runHook postCheck
+          ''
+          else checkPhase;
+      };
+
+
+      script = fishFile "/bin/${name}" text;
+
+      completions_file = fishFile "/share/fish/vendor_completions.d/${name}.fish" completions;
+    in
+    final.symlinkJoin {
+      inherit name;
+      paths = [
+        script
+      ] ++ optional (completions != null) completions_file;
+    };
+}