xrootd: add tests.test-xrdcp and passthru fetchxrd

pkgs/tools/networking/xrootd/default.nix

@@ -16,6 +16,7 @@
 , systemd
 , voms
 , zlib
+  # Build bin/test-runner
 , enableTestRunner ? true
   # If not null, the builder will
   # move "$out/etc" to "$out/etc.orig" and symlink "$out/etc" to externalEtc.
@@ -36,9 +37,21 @@ stdenv.mkDerivation (finalAttrs: {
 
   outputs = [ "bin" "out" "dev" "man" ];
 
-  passthru.tests = lib.optionalAttrs stdenv.hostPlatform.isLinux {
-    test-runner = callPackage ./test-runner.nix { xrootd = finalAttrs.finalPackage; };
-  };
+  passthru.fetchxrd = callPackage ./fetchxrd.nix { xrootd = finalAttrs.finalPackage; };
+  passthru.tests =
+    lib.optionalAttrs stdenv.hostPlatform.isLinux {
+      test-runner = callPackage ./test-runner.nix { xrootd = finalAttrs.finalPackage; };
+    } // {
+    test-xrdcp = finalAttrs.passthru.fetchxrd {
+      pname = "xrootd-test-xrdcp";
+      # Use the the bin output hash of xrootd as version to ensure that
+      # the test gets rebuild everytime xrootd gets rebuild
+      version = finalAttrs.version + "-" + builtins.substring (builtins.stringLength builtins.storeDir + 1) 32 "${finalAttrs.finalPackage}";
+      url = "root://eospublic.cern.ch//eos/opendata/alice/2010/LHC10h/000138275/ESD/0000/AliESDs.root";
+      hash = "sha256-tIcs2oi+8u/Qr+P7AAaPTbQT+DEt26gEdc4VNerlEHY=";
+    };
+  }
+  ;
 
   nativeBuildInputs = [
     cmake

pkgs/tools/networking/xrootd/fetchxrd.nix

@@ -0,0 +1,42 @@
+{ lib
+, runCommandLocal
+, buildPlatform
+, xrootd
+}:
+
+{ name ? ""
+, pname ? ""
+, version ? ""
+, urls ? [ ]
+, url ? if urls == [ ] then abort "Expect either non-empty `urls` or `url`" else builtins.head urls
+, hash ? lib.fakeHash
+}:
+
+(runCommandLocal name
+  {
+    nativeBuildInputs = [ xrootd ];
+    outputHashAlgo = null;
+    outputHashMode = "flat";
+    outputHash = hash;
+    inherit url;
+    urls = if urls == [ ] then lib.singleton url else urls;
+  }
+  # Set [DY]LD_LIBRARY_PATH to workaround #169677
+  # TODO: Remove the library path after #200830 get merged
+  ''
+    for u in $urls; do
+      ${lib.optionalString buildPlatform.isDarwin "DY"}LD_LIBRARY_PATH=${lib.makeLibraryPath [ xrootd ]} xrdcp --force "$u" "$out"
+      ret=$?
+      (( ret != 0 )) || break
+    done
+    if (( ret )); then
+      echo "xrdcp failed trying to download any of the urls" >&2
+      exit $ret
+    fi
+  '').overrideAttrs (finalAttrs: prevAttrs:
+if (pname != "" && version != "") then {
+  inherit pname version;
+  name = with finalAttrs; "${pname}-${version}";
+} else {
+  name = if (name != "") then name else (baseNameOf finalAttrs.url);
+})