ucg: cleanup

- Use rec-less, overlay-style overridable recursive attributes (in effect since
https://github.com/NixOS/nixpkgs/pull/119942);
- Remove installCheckPhase
  - Change it to a separated derivation inside passthru.tests
- Set meta.mainProgram

pkgs/by-name/uc/ucg/package.nix

@@ -2,11 +2,12 @@
 , stdenv
 , fetchFromGitHub
 , autoreconfHook
+, callPackage
 , pkg-config
 , pcre
 }:
 
-stdenv.mkDerivation {
+stdenv.mkDerivation (finalAttrs: {
   pname = "ucg";
   version = "unstable-2022-09-03";
 
@@ -28,20 +29,11 @@ stdenv.mkDerivation {
     pcre
   ];
 
-  doInstallCheck = true;
-  installCheckPhase = ''
-    runHook preInstallCheck
-
-    testFile=$(mktemp /tmp/ucg-test.XXXX)
-    echo -ne 'Lorem ipsum dolor sit amet\n2.7182818284590' > $testFile
-    $out/bin/ucg 'dolor' $testFile || { rm $testFile; exit -1; }
-    $out/bin/ucg --ignore-case 'lorem' $testFile || { rm $testFile; exit -1; }
-    $out/bin/ucg --word-regexp '2718' $testFile && { rm $testFile; exit -1; }
-    $out/bin/ucg 'pisum' $testFile && { rm $testFile; exit -1; }
-    rm $testFile
-
-    runHook postInstallCheck
-  '';
+  passthru.tests = {
+    simple = callPackage ./tests/simple.nix {
+      ucg = finalAttrs.finalPackage;
+    };
+  };
 
   meta =  {
     homepage = "https://gvansickle.github.io/ucg/";
@@ -53,9 +45,10 @@ stdenv.mkDerivation {
       appropriate with grep. Search patterns are specified as PCRE regexes.
     '';
     license = lib.licenses.gpl3Plus;
+    mainProgram = "ucg";
     maintainers = with lib.maintainers; [ AndersonTorres ];
     platforms = lib.platforms.unix;
     broken = stdenv.isAarch64 || stdenv.isDarwin;
   };
-}
+})
 # TODO: report upstream

pkgs/by-name/uc/ucg/tests/simple.nix

@@ -0,0 +1,26 @@
+{ lib
+, stdenv
+, ucg
+}:
+
+stdenv.mkDerivation {
+  pname = "ucg-test";
+  inherit (ucg) version;
+
+  nativeBuildInputs = [ ucg ];
+
+  dontInstall = true;
+
+  buildCommand = ''
+    testFile=$(mktemp /tmp/ucg-test.XXXX)
+    echo -ne 'Lorem ipsum dolor sit amet\n2.7182818284590' > $testFile
+    ucg 'dolor' $testFile || { rm $testFile; exit -1; }
+    ucg --ignore-case 'lorem' $testFile || { rm $testFile; exit -1; }
+    ucg --word-regexp '2718' $testFile && { rm $testFile; exit -1; }
+    ucg 'pisum' $testFile && { rm $testFile; exit -1; }
+    rm $testFile
+    touch $out
+  '';
+
+  meta.timeout = 10;
+}

pkgs/top-level/all-packages.nix

@@ -8864,8 +8864,6 @@ with pkgs;
 
   robodoc = callPackage ../tools/text/robodoc { };
 
-  ucg = callPackage ../tools/text/ucg { };
-
   grive2 = callPackage ../tools/filesystems/grive2 { };
 
   groff = callPackage ../tools/text/groff { };