NixOS · infinisil · May 8, 2021 · Feb 25, 2021
diff --git a/lib/meta.nix b/lib/meta.nix
@@ -87,4 +87,16 @@ rec {
         then { system = elem; }
         else { parsed = elem; };
     in lib.matchAttrs pattern platform;
+
+  /* Check if a package is available on a given platform.
+
+     A package is available on a platform if both
+
+       1. One of `meta.platforms` pattern matches the given platform.
+
+       2. None of `meta.badPlatforms` pattern matches the given platform.
+  */
+  availableOn = platform: pkg:
+    lib.any (platformMatch platform) pkg.meta.platforms &&
+    lib.all (elem: !platformMatch platform elem) (pkg.meta.badPlatforms or []);
 }
diff --git a/nixos/modules/system/boot/kexec.nix b/nixos/modules/system/boot/kexec.nix
@@ -1,7 +1,7 @@
 { pkgs, lib, ... }:
 
 {
-  config = lib.mkIf (lib.any (lib.meta.platformMatch pkgs.stdenv.hostPlatform) pkgs.kexectools.meta.platforms) {
+  config = lib.mkIf (lib.meta.availableOn pkgs.stdenv.hostPlatform pkgs.kexectools) {
     environment.systemPackages = [ pkgs.kexectools ];
 
     systemd.services.prepare-kexec =

diff --git a/pkgs/development/compilers/ghc/8.10.4.nix b/pkgs/development/compilers/ghc/8.10.4.nix
@@ -18,7 +18,7 @@
 
 , # If enabled, GHC will be built with the GPL-free but slower integer-simple
   # library instead of the faster but GPLed integer-gmp library.
-  enableIntegerSimple ? !(lib.any (lib.meta.platformMatch stdenv.hostPlatform) gmp.meta.platforms), gmp
+  enableIntegerSimple ? !(lib.meta.availableOn stdenv.hostPlatform gmp), gmp
 
 , # If enabled, use -fPIC when compiling static libs.
   enableRelocatedStaticLibs ? stdenv.targetPlatform != stdenv.hostPlatform

diff --git a/pkgs/development/compilers/ghc/8.8.4.nix b/pkgs/development/compilers/ghc/8.8.4.nix
@@ -18,7 +18,7 @@
 
 , # If enabled, GHC will be built with the GPL-free but slower integer-simple
   # library instead of the faster but GPLed integer-gmp library.
-  enableIntegerSimple ? !(lib.any (lib.meta.platformMatch stdenv.hostPlatform) gmp.meta.platforms), gmp
+  enableIntegerSimple ? !(lib.meta.availableOn stdenv.hostPlatform gmp), gmp
 
 , # If enabled, use -fPIC when compiling static libs.
   enableRelocatedStaticLibs ? stdenv.targetPlatform != stdenv.hostPlatform

diff --git a/pkgs/development/compilers/ghc/9.0.1.nix b/pkgs/development/compilers/ghc/9.0.1.nix
@@ -19,7 +19,7 @@
 
 , # If enabled, GHC will be built with the GPL-free but slower integer-simple
   # library instead of the faster but GPLed integer-gmp library.
-  enableIntegerSimple ? !(lib.any (lib.meta.platformMatch stdenv.hostPlatform) gmp.meta.platforms), gmp
+  enableIntegerSimple ? !(lib.meta.availableOn stdenv.hostPlatform gmp), gmp
 
 , # If enabled, use -fPIC when compiling static libs.
   enableRelocatedStaticLibs ? stdenv.targetPlatform != stdenv.hostPlatform

diff --git a/pkgs/development/compilers/ghc/head.nix b/pkgs/development/compilers/ghc/head.nix
@@ -22,7 +22,7 @@
 
 , # If enabled, GHC will be built with the GPL-free but slightly slower native
   # bignum backend instead of the faster but GPLed gmp backend.
-  enableNativeBignum ? !(lib.any (lib.meta.platformMatch stdenv.hostPlatform) gmp.meta.platforms)
+  enableNativeBignum ? !(lib.meta.availableOn stdenv.hostPlatform gmp)
 , gmp
 
 , # If enabled, use -fPIC when compiling static libs.

diff --git a/pkgs/development/libraries/wiredtiger/default.nix b/pkgs/development/libraries/wiredtiger/default.nix
@@ -14,7 +14,7 @@ let
   mkEnable = mkFlag "enable-" "disable-";
   mkWith = mkFlag "with-" "without-";
 
-  shouldUsePkg = pkg: if pkg != null && lib.any (lib.meta.platformMatch stdenv.hostPlatform) pkg.meta.platforms then pkg else null;
+  shouldUsePkg = pkg: if pkg != null && lib.meta.availableOn stdenv.hostPlatform pkg then pkg else null;
 
   optLz4 = shouldUsePkg lz4;
   optSnappy = shouldUsePkg snappy;

diff --git a/pkgs/misc/jackaudio/default.nix b/pkgs/misc/jackaudio/default.nix
@@ -15,7 +15,7 @@
 with lib;
 let
   inherit (python3Packages) python dbus-python;
-  shouldUsePkg = pkg: if pkg != null && lib.any (lib.meta.platformMatch stdenv.hostPlatform) pkg.meta.platforms then pkg else null;
+  shouldUsePkg = pkg: if pkg != null && lib.meta.availableOn stdenv.hostPlatform pkg then pkg else null;
 
   libOnly = prefix == "lib";
 

diff --git a/pkgs/misc/jackaudio/jack1.nix b/pkgs/misc/jackaudio/jack1.nix
@@ -5,7 +5,7 @@
 }:
 
 let
-  shouldUsePkg = pkg: if pkg != null && lib.any (lib.meta.platformMatch stdenv.hostPlatform) pkg.meta.platforms then pkg else null;
+  shouldUsePkg = pkg: if pkg != null && lib.meta.availableOn stdenv.hostPlatform pkg then pkg else null;
 
   optAlsaLib = shouldUsePkg alsaLib;
   optDb = shouldUsePkg db;

diff --git a/pkgs/os-specific/linux/apparmor/default.nix b/pkgs/os-specific/linux/apparmor/default.nix
@@ -3,8 +3,8 @@
 , flex, bison
 , linuxHeaders ? stdenv.cc.libc.linuxHeaders
 , gawk
-, withPerl ? stdenv.hostPlatform == stdenv.buildPlatform && lib.any (lib.meta.platformMatch stdenv.hostPlatform) perl.meta.platforms, perl
-, withPython ? stdenv.hostPlatform == stdenv.buildPlatform && lib.any (lib.meta.platformMatch stdenv.hostPlatform) python.meta.platforms, python
+, withPerl ? stdenv.hostPlatform == stdenv.buildPlatform && lib.meta.availableOn stdenv.hostPlatform perl, perl
+, withPython ? stdenv.hostPlatform == stdenv.buildPlatform && lib.meta.availableOn stdenv.hostPlatform python, python
 , swig
 , ncurses
 , pam

diff --git a/pkgs/os-specific/linux/systemd/default.nix b/pkgs/os-specific/linux/systemd/default.nix
@@ -51,9 +51,9 @@
 , iptables
 , withSelinux ? false
 , libselinux
-, withLibseccomp ? lib.any (lib.meta.platformMatch stdenv.hostPlatform) libseccomp.meta.platforms
+, withLibseccomp ? lib.meta.availableOn stdenv.hostPlatform libseccomp
 , libseccomp
-, withKexectools ? lib.any (lib.meta.platformMatch stdenv.hostPlatform) kexectools.meta.platforms
+, withKexectools ? lib.meta.availableOn stdenv.hostPlatform kexectools
 , kexectools
 , bashInteractive
 , libmicrohttpd

diff --git a/pkgs/servers/shishi/default.nix b/pkgs/servers/shishi/default.nix
@@ -14,7 +14,7 @@ let
   mkWith = mkFlag "with-" "without-";
   mkOther = mkFlag "" "" true;
 
-  shouldUsePkg = pkg: if pkg != null && lib.any (lib.meta.platformMatch stdenv.hostPlatform) pkg.meta.platforms then pkg else null;
+  shouldUsePkg = pkg: if pkg != null && lib.meta.availableOn stdenv.hostPlatform pkg then pkg else null;
 
   optPam = shouldUsePkg pam;
   optLibidn = shouldUsePkg libidn;

diff --git a/pkgs/tools/misc/tlp/default.nix b/pkgs/tools/misc/tlp/default.nix
@@ -88,7 +88,7 @@
         systemd
         util-linux
       ] ++ lib.optional enableRDW networkmanager
-        ++ lib.optional (lib.any (lib.meta.platformMatch stdenv.hostPlatform) x86_energy_perf_policy.meta.platforms) x86_energy_perf_policy
+        ++ lib.optional (lib.meta.availableOn stdenv.hostPlatform x86_energy_perf_policy) x86_energy_perf_policy
     );
   in
     ''

diff --git a/pkgs/tools/package-management/nix/default.nix b/pkgs/tools/package-management/nix/default.nix
@@ -21,7 +21,7 @@ common =
   , storeDir
   , stateDir
   , confDir
-  , withLibseccomp ? lib.any (lib.meta.platformMatch stdenv.hostPlatform) libseccomp.meta.platforms, libseccomp
+  , withLibseccomp ? lib.meta.availableOn stdenv.hostPlatform libseccomp, libseccomp
   , withAWS ? !enableStatic && (stdenv.isLinux || stdenv.isDarwin), aws-sdk-cpp
   , enableStatic ? stdenv.hostPlatform.isStatic
   , name, suffix ? "", src