tests.buildFHSEnv.liblzma: init

Do so in a generalized manner.

pkgs/test/buildFHSEnv/default.nix

@@ -0,0 +1,69 @@
+{ lib
+, buildFHSEnv
+, runCommand
+, stdenv
+, fetchurl
+, dpkg
+, glibc
+, callPackage
+}:
+
+let
+  getSharedObjectFromDebian = sharedObjectName: src: stdenv.mkDerivation  {
+    name = "${sharedObjectName}-fetcher";
+    inherit src;
+    nativeBuildInputs = [
+      dpkg
+    ];
+    dontBuild = true;
+    dontConfigure = true;
+    dontFixup = true;
+    installPhase = ''
+      echo shared objects found are:
+      ls -l usr/lib/*/
+      cp usr/lib/*/${sharedObjectName} $out
+    '';
+  };
+
+  makeSharedObjectTest = sharedObject: targetPkgs: let
+    lddFHSEnv = buildFHSEnv {
+      name = "ldd-with-ncurses-FHS-env";
+      inherit targetPkgs;
+      runScript = "ldd";
+    };
+    ldd-in-FHS = "${lddFHSEnv}/bin/${lddFHSEnv.name}";
+    ldd = "${lib.getBin glibc}/bin/ldd";
+    find_libFHSEnv = buildFHSEnv {
+      name = "ls-with-ncurses-FHS-env";
+      targetPkgs = p: [
+        p.ncurses5
+      ];
+      runScript = "find /lib/ -executable";
+    };
+    find_lib-in-FHS = "${find_libFHSEnv}/bin/${find_libFHSEnv.name}";
+  in runCommand "FHS-lib-test" {} ''
+    echo original ldd output is:
+    ${ldd} ${sharedObject}
+    lddOutput="$(${ldd-in-FHS} ${sharedObject})"
+    echo ldd output inside FHS is:
+    echo "$lddOutput"
+    if echo $lddOutput | grep -q "not found"; then
+      echo "shared object could not find all dependencies in the FHS!"
+      echo The libraries below where found in the FHS:
+      ${find_lib-in-FHS}
+      exit 1
+    else
+      echo $lddOutput > $out
+    fi
+  '';
+
+in {
+  liblzma = makeSharedObjectTest (getSharedObjectFromDebian "libxml2.so.2.9.14" (fetchurl {
+    url = "mirror://debian/pool/main/libx/libxml2/libxml2_2.9.14+dfsg-1.3~deb12u1_amd64.deb";
+    hash = "sha256-NbdstwOPwclAIEpPBfM/+3nQJzU85Gk5fZrc+Pmz4ac=";
+  })) (p: [
+    p.xz
+    p.zlib
+    p.icu72
+  ]);
+}

pkgs/test/default.nix

@@ -168,5 +168,7 @@ with pkgs;
 
   pkgs-lib = recurseIntoAttrs (import ../pkgs-lib/tests { inherit pkgs; });
 
+  buildFHSEnv = recurseIntoAttrs (callPackages ./buildFHSEnv { });
+
   nixpkgs-check-by-name = callPackage ./nixpkgs-check-by-name { };
 }