convmv: add Darwin support, reformat & migrate to pkgs/by-name

Add support for Darwin to convmv. This required disabling the tests as
APFS requires filenames to be valid UTF-8[^1]. This will also affect
Linux if a filesystem that enforces valid UTF-8 is used (such as ZFS
with `utf8only=on`).

While we're here, make some changes to clean up the derivation:

- Replace use of `rec` with `finalAttrs` pattern
- Replace `fetchurl` with `fetchzip`
- Added separate `man` output
- Replace `preBuild` hook with explicit `makeFlags` initialization
- Replace explicit `patchPhase` override with `prePatch` hook
- Enable `strictDeps`
- Disable redundant `patchShebangs` call (already done in `prePatch`
  hook)
- Address lints from `nixpkgs-hammer`
- Reformat with `nixfmt-rfc-style`
- Migrate to pkgs/by-name

[^1]: https://developer.apple.com/library/archive/documentation/FileManagement/Conceptual/APFS_Guide/FAQ/FAQ.html

pkgs/by-name/co/convmv/package.nix

@@ -0,0 +1,60 @@
+{
+  lib,
+  stdenv,
+  fetchzip,
+  perl,
+}:
+
+stdenv.mkDerivation (finalAttrs: {
+  pname = "convmv";
+  version = "2.05";
+
+  outputs = [
+    "out"
+    "man"
+  ];
+
+  src = fetchzip {
+    url = "https://www.j3e.de/linux/convmv/convmv-${finalAttrs.version}.tar.gz";
+    hash = "sha256-ts9xAPRGUoS0XBRTmpb+BlGW1hmGyUs+rQLyUEgiZ54=";
+  };
+
+  strictDeps = true;
+
+  nativeBuildInputs = [ perl ];
+
+  buildInputs = [ perl ];
+
+  makeFlags = [
+    "PREFIX=${placeholder "out"}"
+    "MANDIR=${placeholder "man"}/share/man"
+  ];
+
+  checkTarget = "test";
+
+  # testsuite.tar contains filenames that aren't valid UTF-8. Extraction of
+  # testsuite.tar will fail as APFS enforces that filenames are valid UTF-8.
+  doCheck = !stdenv.isDarwin;
+
+  prePatch =
+    lib.optionalString finalAttrs.doCheck ''
+      tar -xf testsuite.tar
+    ''
+    + ''
+      patchShebangs --host .
+    '';
+
+  dontPatchShebangs = true;
+
+  meta = with lib; {
+    description = "Converts filenames from one encoding to another";
+    downloadPage = "https://www.j3e.de/linux/convmv/";
+    license = with licenses; [
+      gpl2Only
+      gpl3Only
+    ];
+    maintainers = with maintainers; [ ];
+    mainProgram = "convmv";
+    platforms = platforms.unix;
+  };
+})

pkgs/tools/misc/convmv/default.nix

@@ -1,33 +0,0 @@
-{ lib, stdenv, fetchurl, perl }:
-
-stdenv.mkDerivation rec {
-  pname = "convmv";
-  version = "2.05";
-
-  src = fetchurl {
-    url = "https://www.j3e.de/linux/convmv/convmv-${version}.tar.gz";
-    sha256 = "19hwv197p7c23f43vvav5bs19z9b72jzca2npkjsxgprwj5ardjk";
-  };
-
-  preBuild=''
-    makeFlags="PREFIX=$out"
-  '';
-
-  patchPhase=''
-    tar -xf testsuite.tar
-    patchShebangs .
-  '';
-
-  doCheck = true;
-  checkTarget = "test";
-
-  buildInputs = [ perl ];
-
-  meta = with lib; {
-    description = "Converts filenames from one encoding to another";
-    platforms = platforms.linux ++ platforms.freebsd ++ platforms.cygwin;
-    maintainers = [ ];
-    license = licenses.gpl2Plus;
-    mainProgram = "convmv";
-  };
-}

pkgs/top-level/all-packages.nix

@@ -6988,8 +6988,6 @@ with pkgs;
 
   convfont = callPackage ../tools/misc/convfont { };
 
-  convmv = callPackage ../tools/misc/convmv { };
-
   cpcfs = callPackage ../tools/filesystems/cpcfs { };
 
   coreutils =  callPackage ../tools/misc/coreutils { };