minimal: Add fzf + ripgrep previewer

minimal/hm.nix

@@ -38,6 +38,7 @@
       tokei
       unzip
       wget
+	  frg
 
       # Useful for pandoc to latex
       (texlive.combine {

pkgs/default.nix

@@ -17,4 +17,5 @@
     inherit naersk;
     dotacatSrc = sources.dotacat;
   };
+  frg = callPackage ./frg.nix {};
 }

pkgs/frg.nix

@@ -0,0 +1,37 @@
+{
+  stdenv,
+  writeText,
+  fzf,
+  ripgrep,
+  bat,
+}:
+stdenv.mkDerivation {
+  pname = "frg";
+  version = "0.1.0";
+
+  dontUnpack = true;
+
+  installPhase = let
+    script = writeText "frg" ''
+      #!/usr/bin/env bash
+
+      # 1. Search for text in files using Ripgrep
+      # 2. Interactively restart Ripgrep with reload action
+      # 3. Open the file in Vim
+      RG_PREFIX="${ripgrep}/bin/rg --column --line-number --no-heading --color=always --smart-case "
+      INITIAL_QUERY="''${*:-}"
+      FZF_DEFAULT_COMMAND="$RG_PREFIX $(printf %q "$INITIAL_QUERY")" \
+      ${fzf}/bin/fzf --ansi \
+          --disabled --query "$INITIAL_QUERY" \
+          --bind "change:reload:sleep 0.1; $RG_PREFIX {q} || true" \
+          --delimiter : \
+          --preview '${bat}/bin/bat --color=always {1} --highlight-line {2}' \
+          --preview-window 'up,60%,border-bottom,+{2}+3/3,~3' \
+          --bind "enter:become($EDITOR {1} +{2})"
+    '';
+  in ''
+  	mkdir -p $out/bin
+    cp ${script} $out/bin/frg
+	chmod +x $out/bin/frg
+  '';
+}