pkgs: add comma

pkgs/comma/comma

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+print_err() {
+    printf "%s\n" "$1" >&2
+}
+
+usage() {
+    print_err "Usage: , <program> [argument]..."
+}
+
+find_program() {
+    local CANDIDATE
+    CANDIDATE="$(nix-locate --top-level --minimal --at-root --whole-name "/bin/$1")"
+    if [ "$(printf '%s\n' "$CANDIDATE" | wc -l)" -gt 1 ]; then
+        CANDIDATE="$(printf '%s' "$CANDIDATE" | fzf-tmux)"
+    fi
+    printf '%s' "$CANDIDATE"
+}
+
+if [ $# -lt 1 ]; then
+    usage
+    exit 1
+fi
+
+PROGRAM="$(find_program "$1")"
+if [ -z "$PROGRAM" ]; then
+    print_err "No match found for $1"
+    exit 1
+fi
+
+nix shell "nixpkgs#$PROGRAM" -c "$@"

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;
+  };
+}

pkgs/default.nix

@@ -1,5 +1,7 @@
 { pkgs }:
 rec {
+  comma = pkgs.callPackage ./comma { };
+
   diff-flake = pkgs.callPackage ./diff-flake { };
 
   havm = pkgs.callPackage ./havm { };