flutter: Implement mkFlutter function using barebones FHS environment

pkgs/development/compilers/flutter/fhs.nix

@@ -1,71 +1,78 @@
 { lib
 , stdenv
+, callPackage
 , flutter
 , buildFHSUserEnv
 , runCommandLocal
 , supportsAndroidEmulator ? stdenv.isLinux
 }:
 
-# Wrap flutter inside an fhs user env to allow execution of binary,
-# like adb from $ANDROID_HOME or java from android-studio.
-buildFHSUserEnv {
-  name = flutter.name;
+let
+  # Wrap flutter inside an fhs user env to allow execution of binary,
+  # like adb from $ANDROID_HOME or java from android-studio.
+  self = buildFHSUserEnv {
+    name = flutter.name;
 
-  multiPkgs = pkgs: with pkgs; ([
-    # Flutter only use these certificates
-    (runCommandLocal "fedoracert" { } ''
-      mkdir -p $out/etc/pki/tls/
-      ln -s ${cacert}/etc/ssl/certs $out/etc/pki/tls/certs
-    '')
-    zlib
-  ]);
+    multiPkgs = pkgs: with pkgs; ([
+      # Flutter only use these certificates
+      (runCommandLocal "fedoracert" { } ''
+        mkdir -p $out/etc/pki/tls/
+        ln -s ${cacert}/etc/ssl/certs $out/etc/pki/tls/certs
+      '')
+      zlib
+    ]);
 
-  targetPkgs = pkgs: with pkgs; ([
-    flutter
+    targetPkgs = pkgs: with pkgs; ([
+      flutter
 
-    # General ecosystem dependencies
-    bash
-    curl
-    git
-    unzip
-    which
-    xz
+      # General ecosystem dependencies
+      bash
+      curl
+      git
+      unzip
+      which
+      xz
 
-    # flutter test requires this lib
-    libGLU
-  ] ++ lib.optional supportsAndroidEmulator [
-    # for android emulator
-    alsa-lib
-    dbus
-    expat
-    libpulseaudio
-    libuuid
-    xorg.libX11
-    xorg.libxcb
-    xorg.libXcomposite
-    xorg.libXcursor
-    xorg.libXdamage
-    xorg.libXext
-    xorg.libXfixes
-    xorg.libXi
-    xorg.libXrender
-    xorg.libXtst
-    libGL
-    nspr
-    nss
-    systemd
-  ]);
+      # flutter test requires this lib
+      libGLU
+    ] ++ lib.optional supportsAndroidEmulator [
+      # for android emulator
+      alsa-lib
+      dbus
+      expat
+      libpulseaudio
+      libuuid
+      xorg.libX11
+      xorg.libxcb
+      xorg.libXcomposite
+      xorg.libXcursor
+      xorg.libXdamage
+      xorg.libXext
+      xorg.libXfixes
+      xorg.libXi
+      xorg.libXrender
+      xorg.libXtst
+      libGL
+      nspr
+      nss
+      systemd
+    ]);
 
-  runScript = "flutter";
+    runScript = "flutter";
 
-  passthru = {
-    inherit flutter;
+    passthru = flutter.passthru // {
+      wrapped = flutter;
+      mkFlutterApp = callPackage ../../../build-support/flutter {
+        flutter = callPackage ./fhs.nix { supportsAndroidEmulator = false; };
+      };
+    };
+
+    meta = flutter.meta // {
+      longDescription = ''
+        ${flutter.meta.longDescription}
+        Wrapped in a FHS environment to improve compatibility with internal tools and tools in the ecosystem.
+      '';
+    };
   };
-
-  meta = flutter.meta // {
-    longDescription = ''
-      ${flutter.meta.longDescription}
-      Wrapped in a FHS environment to improve compatibility with internal tools and tools in the ecosystem.
-    '';
-  };
-}
+in
+self