xxd: reduce closure size by splitting it into it's own output

nixos/doc/manual/release-notes/rl-2405.section.md

@@ -75,6 +75,8 @@ The pre-existing [services.ankisyncd](#opt-services.ankisyncd.enable) has been m
 
 - `services.resolved.fallbackDns` can now be used to disable the upstream fallback servers entirely by setting it to an empty list. To get the previous behaviour of the upstream defaults set it to null, the new default, instead.
 
+- `xxd` has been moved from `vim` default output to its own output to reduce closure size. The canonical way to reference it across all platforms is `unixtools.xxd`.
+
 - `services.avahi.nssmdns` got split into `services.avahi.nssmdns4` and `services.avahi.nssmdns6` which enable the mDNS NSS switch for IPv4 and IPv6 respectively.
   Since most mDNS responders only register IPv4 addresses, most users want to keep the IPv6 support disabled to avoid long timeouts.
 

pkgs/applications/editors/vim/common.nix

@@ -2,6 +2,8 @@
 rec {
   version = "9.0.2116";
 
+  outputs = [ "out" "xxd" ];
+
   src = fetchFromGitHub {
     owner = "vim";
     repo = "vim";
@@ -14,12 +16,21 @@ rec {
 
   hardeningDisable = [ "fortify" ];
 
-  postPatch =
-    # Use man from $PATH; escape sequences are still problematic.
-    ''
-      substituteInPlace runtime/ftplugin/man.vim \
-        --replace "/usr/bin/man " "man "
-    '';
+  # Use man from $PATH; escape sequences are still problematic.
+  postPatch = ''
+    substituteInPlace runtime/ftplugin/man.vim \
+      --replace "/usr/bin/man " "man "
+  '';
+
+  # man page moving is done in postFixup instead of postInstall otherwise fixupPhase moves it right back where it was
+  postFixup = ''
+    moveToOutput bin/xxd "$xxd"
+    moveToOutput share/man/man1/xxd.1.gz "$xxd"
+    for manFile in $out/share/man/*/man1/xxd.1*; do
+      # moveToOutput does not take full paths or wildcards...
+      moveToOutput "share/man/$(basename "$(dirname "$(dirname "$manFile")")")/man1/xxd.1.gz" "$xxd"
+    done
+  '';
 
   meta = with lib; {
     description = "The most popular clone of the VI editor";
@@ -28,5 +39,6 @@ rec {
     maintainers = with maintainers; [ das_j equirosa ];
     platforms   = platforms.unix;
     mainProgram = "vim";
+    outputsToInstall = [ "out" "xxd" ];
   };
 }

pkgs/applications/editors/vim/default.nix

@@ -15,7 +15,7 @@ in
 stdenv.mkDerivation {
   pname = "vim";
 
-  inherit (common) version src postPatch hardeningDisable enableParallelBuilding enableParallelInstalling meta;
+  inherit (common) version outputs src postPatch hardeningDisable enableParallelBuilding enableParallelInstalling postFixup meta;
 
   nativeBuildInputs = [ gettext pkg-config ];
   buildInputs = [ ncurses bash gawk ]

pkgs/applications/editors/vim/full.nix

@@ -66,7 +66,7 @@ in stdenv.mkDerivation {
 
   pname = "vim-full";
 
-  inherit (common) version postPatch hardeningDisable enableParallelBuilding meta;
+  inherit (common) version outputs postPatch hardeningDisable enableParallelBuilding meta;
 
   src = builtins.getAttr source {
     default = common.src; # latest release
@@ -181,7 +181,7 @@ in stdenv.mkDerivation {
     ln -sfn '${nixosRuntimepath}' "$out"/share/vim/vimrc
   '';
 
-  postFixup = lib.optionalString wrapPythonDrv ''
+  postFixup = common.postFixup + lib.optionalString wrapPythonDrv ''
     wrapProgram "$out/bin/vim" --prefix PATH : "${python3}/bin" \
       --set NIX_PYTHONPATH "${python3}/${python3.sitePackages}"
   '';

pkgs/top-level/unixtools.nix

@@ -174,8 +174,8 @@ let
       darwin = pkgs.darwin.basic_cmds;
     };
     xxd = {
-      linux = pkgs.vim;
-      darwin = pkgs.vim;
+      linux = pkgs.vim.xxd;
+      darwin = pkgs.vim.xxd;
     };
   };