evdev-proto: init at 6.0

FreeBSD implements Linux's evdev API, but doesn't come with headers
for it.  Instead, the Linux headers are just modified to be suitable
for FreeBSD, via a port called evdev-proto.  I don't want to copy the
complicated sed expressions from the port into Nixpkgs, so instead we
just build and install the port inside a Nix derivation.

pkgs/os-specific/bsd/freebsd/default.nix

@@ -2,7 +2,7 @@
 , makeScopeWithSplicing, generateSplicesForMkScope
 , buildPackages
 , bsdSetupHook, makeSetupHook
-, fetchgit, fetchurl, coreutils, groff, mandoc, byacc, flex, which, m4, gawk, substituteAll, runtimeShell
+, fetchgit, fetchzip, coreutils, groff, mandoc, byacc, flex, which, m4, gawk, substituteAll, runtimeShell
 , zlib, expat, libmd
 , runCommand, writeShellScript, writeText, symlinkJoin
 }:
@@ -75,6 +75,11 @@ in makeScopeWithSplicing
   in {
   inherit freebsdSrc;
 
+  ports = fetchzip {
+    url = "https://cgit.freebsd.org/ports/snapshot/ports-dde3b2b456c3a4bdd217d0bf3684231cc3724a0a.tar.gz";
+    sha256 = "BpHqJfnGOeTE7tkFJBx0Wk8ryalmf4KNTit/Coh026E=";
+  };
+
   # Why do we have splicing and yet do `nativeBuildInputs = with self; ...`?
   # See note in ../netbsd/default.nix.
 

pkgs/os-specific/bsd/freebsd/evdev-proto/default.nix

@@ -0,0 +1,64 @@
+{ lib, stdenv, linuxHeaders, freebsd, runCommandCC, buildPackages }:
+
+stdenv.mkDerivation {
+  pname = "evdev-proto";
+  inherit (linuxHeaders) version;
+
+  src = freebsd.ports;
+
+  sourceRoot = "source/devel/evdev-proto";
+
+  useTempPrefix = true;
+
+  nativeBuildInputs = [ freebsd.makeMinimal ];
+
+  ARCH = freebsd.makeMinimal.MACHINE_ARCH;
+  OPSYS = "FreeBSD";
+  _OSRELEASE = "${lib.versions.majorMinor freebsd.makeMinimal.version}-RELEASE";
+
+  AWK = "awk";
+  CHMOD = "chmod";
+  FIND = "find";
+  MKDIR = "mkdir -p";
+  PKG_BIN = "${buildPackages.pkg}/bin/pkg";
+  RM = "rm -f";
+  SED = "${buildPackages.freebsd.sed}/bin/sed";
+  SETENV = "env";
+  SH = "sh";
+  TOUCH = "touch";
+  XARGS = "xargs";
+
+  ABI_FILE = runCommandCC "abifile" {} "$CC -shared -o $out";
+  CLEAN_FETCH_ENV = true;
+  INSTALL_AS_USER = true;
+  NO_CHECKSUM = true;
+  NO_MTREE = true;
+  SRC_BASE = freebsd.freebsdSrc;
+
+  preUnpack = ''
+    export MAKE_JOBS_NUMBER="$NIX_BUILD_CORES"
+
+    export DISTDIR="$PWD/distfiles"
+    export PKG_DBDIR="$PWD/pkg"
+    export PREFIX="$prefix"
+
+    mkdir -p "$DISTDIR/evdev-proto"
+    tar -C "$DISTDIR/evdev-proto" \
+        -xf ${linuxHeaders.src} \
+        --strip-components 4 \
+        linux-${linuxHeaders.version}/include/uapi/linux
+  '';
+
+  makeFlags = [ "DIST_SUBDIR=evdev-proto" ];
+
+  postInstall = ''
+    mv $prefix $out
+  '';
+
+  meta = with lib; {
+    description = "Input event device header files for FreeBSD";
+    maintainers = with maintainers; [ qyliss ];
+    platforms = platforms.freebsd;
+    license = licenses.gpl2Only;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -25422,6 +25422,8 @@ with pkgs;
 
   erofs-utils = callPackage ../os-specific/linux/erofs-utils { };
 
+  evdev-proto = callPackage ../os-specific/bsd/freebsd/evdev-proto { };
+
   fscryptctl = callPackage ../os-specific/linux/fscryptctl { };
   # unstable until the first 1.x release
   fscrypt-experimental = callPackage ../os-specific/linux/fscrypt { };