pkgs: add comma

pkgs/comma/default.nix

@@ -0,0 +1,42 @@
+{ fzf, lib, makeWrapper, nix-index, shellcheck, stdenvNoCC }:
+stdenvNoCC.mkDerivation rec {
+  pname = "comma";
+  version = "0.1.0";
+
+  src = ./. + "/comma";
+
+  phases = [ "buildPhase" "installPhase" "fixupPhase" ];
+
+  buildInputs = [
+    makeWrapper
+    shellcheck
+  ];
+
+  buildPhase = ''
+    shellcheck $src
+  '';
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp $src $out/bin/${meta.mainProgram}
+    chmod a+x $out/bin/${meta.mainProgram}
+  '';
+
+  wrapperPath = lib.makeBinPath [
+    fzf
+    nix-index
+  ];
+
+  fixupPhase = ''
+    patchShebangs $out/bin/${meta.mainProgram}
+    wrapProgram $out/bin/${meta.mainProgram} --prefix PATH : "${wrapperPath}"
+  '';
+
+  meta = with lib; {
+    mainProgram = ",";
+    description = "A simple script inspired by Shopify's comma, for modern Nix";
+    homepage = "https://gitea.belanyi.fr/ambroisie/nix-config";
+    license = with licenses; [ mit ];
+    platforms = platforms.unix;
+  };
+}