From 52cb6b2410136db098c6be21652eddd13b9012fc Mon Sep 17 00:00:00 2001
From: yukkop <hectic.yukkop@gmail.com>
Date: Wed, 23 Jul 2025 20:15:53 +0000
Subject: [PATCH] feat(package): nix-derivation-hash

---
 package/default.nix                                | 1 +
 package/nix-derivation-hash/default.nix            | 9 +++++++++
 package/nix-derivation-hash/nix-derivation-hash.sh | 9 +++++++++
 3 files changed, 19 insertions(+)
 create mode 100644 package/nix-derivation-hash/default.nix
 create mode 100644 package/nix-derivation-hash/nix-derivation-hash.sh

diff --git a/package/default.nix b/package/default.nix
index f865848..80ff22b 100644
--- a/package/default.nix
+++ b/package/default.nix
@@ -272,4 +272,5 @@ in {
   c-hectic = pkgs.callPackage ./c/hectic/default.nix {};
   watch = pkgs.callPackage ./c/watch/default.nix {};
   support-bot = pkgs.callPackage ./support-bot {};
+  nix-derivation-hash = pkgs.callPackage ./nix-derivation-hash {};
 }
diff --git a/package/nix-derivation-hash/default.nix b/package/nix-derivation-hash/default.nix
new file mode 100644
index 0000000..a46528a
--- /dev/null
+++ b/package/nix-derivation-hash/default.nix
@@ -0,0 +1,9 @@
+{
+  writeShellScriptBin,
+  bash,
+}: let
+  # Use folder name as name of this system
+  name = builtins.baseNameOf ./.;
+in writeShellScriptBin name /* sh */ ''
+  ${bash}/bin/sh ${./${name}.sh} "$@"
+''
diff --git a/package/nix-derivation-hash/nix-derivation-hash.sh b/package/nix-derivation-hash/nix-derivation-hash.sh
new file mode 100644
index 0000000..cd6b4c3
--- /dev/null
+++ b/package/nix-derivation-hash/nix-derivation-hash.sh
@@ -0,0 +1,9 @@
+path="$1"
+base_path_name="$(basename "$path")"
+sha256="$(nix-hash --type sha256 "$path")"
+temp_dir="$(mktemp -d)"
+temp_file="${temp_dir}/${base_path_name}.str"
+printf "source:sha256:%s:/nix/store:%s" "$sha256" "$base_path_name" > "$temp_file"
+nix-hash --type sha256 --truncate --base32 --flat "$temp_file"
+
+rm -rf "${temp_dir:?}"