Introduce mkInstallable

codecs/resize/flake.nix

@@ -15,13 +15,14 @@
       system:
       let
         pkgs = nixpkgs.legacyPackages.${system};
-        inherit (pkgs) callPackage writeShellScriptBin;
+        inherit (pkgs) callPackage;
 
         buildSquooshRustCodec= callPackage (import ../../nix/squoosh-rust-builder) {fenix = fenix.packages.${system};};
+        mkInstallable = callPackage (import ../../nix/mk-installable) {};
 
         src = ./.;
       in
-      {
+      mkInstallable {
         packages = rec {
           default = resize-squoosh;
           resize-squoosh = buildSquooshRustCodec {
@@ -34,17 +35,6 @@
               sha256 = "sha256-HTElSB76gqCpDu8S0ZJlfd/S4ftMrbwxFgJM9OXBRz8=";
             };
           };
-
-          installScript = writeShellScriptBin "install.sh" ''
-            ${pkgs.coreutils}/bin/mkdir -p wasm_build
-            ${pkgs.rsync}/bin/rsync --chmod=u+w -r ${self.packages.${system}.resize-squoosh}/* wasm_build/
-          '';
-        };
-        apps = {
-          install = {
-            type = "app";
-            program = "${self.packages.${system}.installScript}/bin/install.sh";
-          };
         };
       }
     );

codecs/rotate/flake.nix

@@ -19,10 +19,11 @@
         inherit (pkgs) callPackage writeShellScriptBin;
         
         buildSquooshRustCodec= callPackage (import ../../nix/squoosh-rust-builder) {fenix = fenix.packages.${system};};
+        mkInstallable = callPackage (import ../../nix/mk-installable) {};
 
         src = ./.;
       in
-      {
+      mkInstallable {
         packages = rec {
           default = rotate-squoosh;
           rotate-squoosh = buildSquooshRustCodec {
@@ -33,17 +34,6 @@
             };
             wasmBindgen = null;
           };
-
-          installScript = writeShellScriptBin "install.sh" ''
-            ${pkgs.coreutils}/bin/mkdir -p wasm_build
-            ${pkgs.rsync}/bin/rsync --chmod=u+w -r ${self.packages.${system}.rotate-squoosh}/* wasm_build/
-          '';
-        };
-        apps = {
-          install = {
-            type = "app";
-            program = "${self.packages.${system}.installScript}/bin/install.sh";
-          };
         };
       }
     );

nix/for-each-option.nix

@@ -1,6 +0,0 @@
-{ lib }:
-f: opts:
-let
-  derivations = (lib.attrsets.mapAttrsToList f opts);
-in
-lib.lists.fold (a: b: a // b) { } derivations

nix/mk-installable/default.nix

@@ -0,0 +1,19 @@
+{
+  coreutils,
+  rsync,
+  writeShellScriptBin,
+  lib,
+}:
+flake:
+let
+  installScript = writeShellScriptBin "install.sh" ''
+    ${coreutils}/bin/mkdir -p wasm_build
+    ${rsync}/bin/rsync --chmod=u+w -r ${flake.packages.default}/* wasm_build/
+  '';
+in
+lib.recursiveUpdate flake {
+  apps.install = {
+    type = "app";
+    program = "${installScript}/bin/install.sh";
+  };
+}