devour-flake: init at 2

pkgs/tools/nix/devour-flake/default.nix

@@ -0,0 +1,27 @@
+{ writeShellApplication
+, fetchFromGitHub
+, nix
+}:
+
+let
+  devour-flake = fetchFromGitHub {
+    owner = "srid";
+    repo = "devour-flake";
+    rev = "v2";
+    hash = "sha256-CZedJtbZlWAbv/b/aYgOEFd9vcTBn/oJNI3p29UitLk=";
+  };
+in
+writeShellApplication {
+  name = "devour-flake";
+  runtimeInputs = [ nix ];
+  text = ''
+    FLAKE="$1"
+    shift 1 || true
+
+    nix build ${devour-flake}#default \
+      "$@" \
+      -L --no-link --print-out-paths \
+      --override-input flake "$FLAKE" \
+      | xargs cat
+  '';
+}

pkgs/tools/nix/nixci/default.nix

@@ -1,21 +1,14 @@
 { lib, stdenv
 , rustPlatform
 , fetchCrate
-, fetchFromGitHub
 , libiconv
 , openssl
 , pkg-config
 , Security
+, devour-flake
 }:
 
-let
-  devour-flake = fetchFromGitHub {
-    owner = "srid";
-    repo = "devour-flake";
-    rev = "v2";
-    sha256 = "sha256-CZedJtbZlWAbv/b/aYgOEFd9vcTBn/oJNI3p29UitLk=";
-  };
-in rustPlatform.buildRustPackage rec {
+rustPlatform.buildRustPackage rec {
   pname = "nixci";
   version = "0.1.3";
 
@@ -33,7 +26,7 @@ in rustPlatform.buildRustPackage rec {
 
   # The rust program expects an environment (at build time) that points to the
   # devour-flake executable.
-  DEVOUR_FLAKE = lib.getExe (callPackage devour-flake { });
+  DEVOUR_FLAKE = lib.getExe devour-flake;
 
   meta = with lib; {
     description = "Define and build CI for Nix projects anywhere";

pkgs/top-level/all-packages.nix

@@ -565,6 +565,8 @@ with pkgs;
 
   dec-decode = callPackage ../development/tools/dec-decode { };
 
+  devour-flake = callPackage ../tools/nix/devour-flake { };
+
   dnf5 = callPackage ../tools/package-management/dnf5 { };
 
   dsq = callPackage ../tools/misc/dsq { };