steamtinkerlaunch: add steamcompattool output (#346956)

pkgs/tools/games/steamtinkerlaunch/default.nix

@@ -3,7 +3,6 @@
 , gawk
 , git
 , lib
-, makeWrapper
 , procps
 , stdenvNoCC
 , unixtools
@@ -12,6 +11,7 @@
 , xdotool
 , xorg
 , yad
+, writeShellApplication
 }:
 
 stdenvNoCC.mkDerivation {
@@ -25,31 +25,71 @@ stdenvNoCC.mkDerivation {
     hash = "sha256-CGtSGAm+52t2zFsPJEsm76w+FEHhbOd9NYuerGa31tc=";
   };
 
-  # hardcode PROGCMD because #150841
-  postPatch = ''
-    substituteInPlace steamtinkerlaunch --replace 'PROGCMD="''${0##*/}"' 'PROGCMD="steamtinkerlaunch"'
-  '';
-
-  nativeBuildInputs = [ makeWrapper ];
+  outputs = [ "out" "steamcompattool" ];
 
   installFlags = [ "PREFIX=\${out}" ];
 
-  postInstall = ''
-    wrapProgram $out/bin/steamtinkerlaunch --prefix PATH : ${lib.makeBinPath [
-      bash
-      gawk
-      git
-      procps
-      unixtools.xxd
-      unzip
-      wget
-      xdotool
-      xorg.xprop
-      xorg.xrandr
-      xorg.xwininfo
-      yad
-    ]}
-  '';
+  nativeBuildInputs = let
+    # We need a `steam` command in order to install the compat tool
+    fakeSteam = writeShellApplication {
+      name = "steam";
+      text = "exit 0";
+    };
+  in [
+    fakeSteam
+  ];
+
+  postInstall =
+    let
+      # We (ab)use writeShellApplication to produce a header for a shell script
+      # here in order to add the runtimePath to the original script. We cannot
+      # wrap here as that always corrupts $0 in bash scripts which STL uses to
+      # install its compat tool.
+      header = writeShellApplication {
+        runtimeInputs = [
+          bash
+          gawk
+          git
+          procps
+          unixtools.xxd
+          unzip
+          wget
+          xdotool
+          xorg.xprop
+          xorg.xrandr
+          xorg.xwininfo
+          yad
+        ];
+        name = "stl-head";
+        text = "";
+        bashOptions = [ ];
+      };
+      fakeYad = writeShellApplication {
+        name = "yad";
+        text = "echo ${yad.version} FAKE";
+      };
+    in
+    ''
+      cp $out/bin/steamtinkerlaunch $TMPDIR/steamtinkerlaunch
+      install ${lib.getExe header} -T $out/bin/steamtinkerlaunch
+      tail -n +2 $TMPDIR/steamtinkerlaunch >> $out/bin/steamtinkerlaunch
+
+      # Create a fake steam dir, it checks this and reads a few values
+      steamdir=$TMPDIR/.local/share/Steam/
+      mkdir -p $steamdir/config/
+      echo \"path\" \"$steamdir\" > $steamdir/config/config.vdf
+      mkdir $TMPDIR/.steam/
+      ln -s $steamdir $TMPDIR/.steam/steam
+
+      cp -a $out/bin/steamtinkerlaunch $TMPDIR/steamtinkerlaunch
+      # yad cannot print its version without a graphical session https://github.com/v1cont/yad/issues/277
+      substituteInPlace $TMPDIR/steamtinkerlaunch --replace ${yad} ${fakeYad}
+      HOME=$TMPDIR $TMPDIR/steamtinkerlaunch compat add
+
+      cp -a $steamdir/compatibilitytools.d/SteamTinkerLaunch $steamcompattool
+      # It creates this symlink but it points to $TMPDIR
+      ln -sfn $out/bin/steamtinkerlaunch $steamcompattool/
+    '';
 
   meta = with lib; {
     description = "Linux wrapper tool for use with the Steam client for custom launch options and 3rd party programs";