More fixes and work arounds

Author: hamishmack

builder/comp-builder.nix

@@ -239,7 +239,7 @@ let
     (lib.concatMap (c: if c.isHaskell or false
       then builtins.attrValues (c.components.exes or {})
       else [c]) build-tools) ++
-    lib.optional (pkgconfig != []) buildPackages.pkgconfig;
+    lib.optional (pkgconfig != []) buildPackages.cabalPkgConfigWrapper;
 
   # Unfortunately, we need to wrap ghc commands for cabal builds to
   # work in the nix-shell. See ../doc/removing-with-package-wrapper.md.

builder/default.nix

@@ -17,7 +17,7 @@ let
     # in the native case, it would be the same in the cross case however
     # we *really* want to build the Setup.hs on the build machine and not
     # have the stdenv confuse it with the target/host env.
-    inherit (buildPackages) stdenv pkgconfig;
+    inherit (buildPackages) stdenv;
     inherit buildPackages;
     inherit haskellLib nonReinstallablePkgs makeSetupConfigFiles;
   };

builder/setup-builder.nix

@@ -1,4 +1,4 @@
-{ pkgs, stdenv, lib, buildPackages, haskellLib, ghc, nonReinstallablePkgs, hsPkgs, makeSetupConfigFiles, pkgconfig }@defaults:
+{ pkgs, stdenv, lib, buildPackages, haskellLib, ghc, nonReinstallablePkgs, hsPkgs, makeSetupConfigFiles }@defaults:
 
 let self =
 { component, package, name, src, enableDWARF ? false, flags ? {}, revision ? null, patches ? [], defaultSetupSrc
@@ -38,7 +38,7 @@ let
     (lib.concatMap (c: if c.isHaskell or false
       then builtins.attrValues (c.components.exes or {})
       else [c]) component.build-tools) ++
-    lib.optional (component.pkgconfig != []) pkgconfig;
+    lib.optional (component.pkgconfig != []) buildPackages.cabalPkgConfigWrapper;
 
   drv =
     stdenv.mkDerivation ({

lib/call-cabal-project-to-nix.nix

@@ -66,7 +66,7 @@ in
                             # any plutus-apps input being used for a
                             # package.
 , evalPackages
-, pkgconfSelector ? (_: [])
+, pkgconfigSelector ? (_: [])
 , ...
 }@args:
 
@@ -467,7 +467,9 @@ let
     inherit checkMaterialization;
   }) (evalPackages.runCommand (nameAndSuffix "plan-to-nix-pkgs") {
     nativeBuildInputs = [ nix-tools dummy-ghc dummy-ghc-pkg cabal-install evalPackages.rsync evalPackages.gitMinimal evalPackages.pkgconfig ];
-    buildInputs = pkgconfSelector pkgconfPkgs;
+    # We only need the `.dev` derivation (if there is one), since it will have
+    # the pkgconfig files needed by cabal.
+    buildInputs = map pkgs.lib.getDev (builtins.concatLists (pkgconfigSelector pkgconfPkgs));
     # Needed or stack-to-nix will die on unicode inputs
     LOCALE_ARCHIVE = pkgs.lib.optionalString (evalPackages.stdenv.buildPlatform.libc == "glibc") "${evalPackages.glibcLocales}/lib/locale/locale-archive";
     LANG = "en_US.UTF-8";

lib/pkgconf-nixpkgs-map.nix

@@ -143,8 +143,7 @@ pkgs:
     "sctp"                               = [ pkgs."lksctp-tools" ]; # This is linux-specific, we should create a common attribute if we ever add sctp support for other systems.
     "sdl2"                               = [ pkgs."SDL2" ];
     "sndfile"                            = [ pkgs."libsndfile" ];
-    "sodium"                             = [ pkgs."libsodium".dev ];
-    "libsodium"                          = [ pkgs."libsodium".dev ];
+    "sodium"                             = [ pkgs."libsodium" ];
     "sqlite3"                            = [ pkgs."sqlite" ];
     "ssh2"                               = [ pkgs."libssh2" ];
     "statgrab"                           = [ pkgs."libstatgrab" ];

modules/cabal-project.nix

@@ -130,7 +130,7 @@ in {
       type = nullOr (listOf unspecified);
       default = [];
     };
-    pkgconfSelector = mkOption {
+    pkgconfigSelector = mkOption {
       type = unspecified;
       default = (_: []);
     };

overlays/cabal-pkg-config.nix

@@ -0,0 +1,38 @@
+final: prev:
+{
+  # cabal 3.8 asks pkg-config for linker options for both
+  # dynamic and static linking.
+  # For some derivations (glib for instance) pkg-config can
+  # fail when `--static` is passed.  This might be because
+  # the library only has dynamic libraries. 
+  #
+  # To work around this problem this wrapper makes cabal lazy
+  # by return a single command line option when it fails.
+  # That option should never be used and if it is hopefully
+  # the name of the option itself will be helpful.
+  #
+  # See https://github.com/input-output-hk/haskell.nix/issues/1642
+  #
+  cabalPkgConfigWrapper = prev.pkgconfig.overrideAttrs (attrs: {
+    installPhase = attrs.installPhase + ''
+      mv $out/bin/${attrs.targetPrefix}${attrs.baseBinName} \
+        $out/bin/${attrs.targetPrefix}${attrs.baseBinName}-wrapped
+
+      cat <<EOF >$out/bin/${attrs.targetPrefix}${attrs.baseBinName}      
+      #!${final.stdenv.shell}
+      if [[ "\$1" == "--libs" && "\$2" == "--static" ]]; then
+        OUTPUT=\$(mktemp)
+        ERROR=\$(mktemp)
+        if ${final.pkgconfig}/bin/pkg-config "\$@" >output 2>\$ERROR; then
+          cat \$OUTPUT
+        else
+          echo "--error-pkg-config-static-failed=\$ERROR"
+        fi
+      else
+        ${final.pkgconfig}/bin/pkg-config "\$@"
+      fi
+      EOF
+      chmod +x $out/bin/${attrs.targetPrefix}${attrs.baseBinName}
+    '';
+  });
+}

overlays/default.nix

@@ -21,6 +21,7 @@ let
     gobject-introspection = import ./gobject-introspection.nix;
     hix = import ./hix.nix;
     ghcjs = import ./ghcjs.nix;
+    cabalPkgConfig = import ./cabal-pkg-config.nix;
   };
 
   composeExtensions = f: g: final: prev:
@@ -51,6 +52,7 @@ let
     emscripten
     nix-prefetch-git-minimal
     ghcjs
+    cabalPkgConfig
     gobject-introspection
     hix
     hydra

test/exe-dlls/default.nix

@@ -7,7 +7,7 @@ let
   project = project' {
     inherit compiler-nix-name evalPackages;
     src = testSrc "exe-dlls";
-    pkgconfSelector = p: [p.libsodium];
+    pkgconfigSelector = p: [p.libsodium];
   };
 
   packages = project.hsPkgs;

test/exe-lib-dlls/default.nix

@@ -7,7 +7,7 @@ let
   project = project' {
     inherit compiler-nix-name evalPackages;
     src = testSrc "exe-lib-dlls";
-    pkgconfSelector = p: [p.libsodium];
+    pkgconfigSelector = p: [p.libsodium];
   };
 
   packages = project.hsPkgs;