autodep env variables

autodeps.nix

@@ -1,7 +0,0 @@
-{
-  "openssl-sys" = { build = [ "openssl" ]; };
-  "libudev-sys" = { build = [ "eudev" ]; };
-  "libdbus-sys" = { build = [ "dbus" ]; };
-  "expat-sys" = { build = [ "cmake" ]; };
-  "servo-fontconfig-sys" = { build = [ "fontconfig" ]; };
-}

autodeps/default.nix

@@ -0,0 +1,47 @@
+{ lib, src, config }:
+let
+  inherit (builtins) readFile pathExists attrNames hasAttr;
+  inherit (lib) map intersectLists foldl splitString getAttrFromPath;
+
+  cargoLockDeps =
+    if pathExists (src + /Cargo.lock) then
+      let
+        cargoLock = fromTOML (readFile (src + /Cargo.lock));
+      in
+      map (package: package.name) cargoLock.package
+    else [ ];
+  availableAutoDeps = import ./deps.nix;
+  detectedDeps = intersectLists cargoLockDeps (attrNames availableAutoDeps);
+  mergedDetectedDeps =
+    if config.autodeps then
+      foldl
+        (merged: dep: {
+          build = merged.build ++ (availableAutoDeps.${dep}.build or [ ]);
+          native = merged.native ++ (availableAutoDeps.${dep}.native or [ ]);
+          env =
+            if (hasAttr "env" availableAutoDeps.${dep}) then
+              pkgs: (merged.env pkgs) // (availableAutoDeps.${dep}.env pkgs)
+            else merged.env;
+        })
+        {
+          build = [ ];
+          native = [ ];
+          env = pkgs: { };
+        }
+        detectedDeps else {
+      build = [ ];
+      native = [ ];
+      env = pkgs: { };
+    };
+  getPkgs = pkgs: deps:
+    let
+      depPaths = map (splitString ".") deps;
+    in
+    map (path: getAttrFromPath path pkgs) depPaths;
+  autoDeps = pkgs: {
+    buildInputs = getPkgs pkgs mergedDetectedDeps.build;
+    nativeBuildInputs = with pkgs; [ pkg-config ] ++ (getPkgs pkgs mergedDetectedDeps.native);
+    env = mergedDetectedDeps.env pkgs;
+  };
+in
+autoDeps

autodeps/deps.nix

@@ -0,0 +1,15 @@
+{
+  "openssl-sys" = { build = [ "openssl" ]; };
+  "libudev-sys" = { build = [ "eudev" ]; };
+  "libdbus-sys" = { build = [ "dbus" ]; };
+  "expat-sys" = { native = [ "cmake" ]; };
+  "servo-fontconfig-sys" = { build = [ "fontconfig" ]; };
+  "x11-dl" = { build = [ "xorg.libX11" "xorg.libXcursor" "xorg.libXrandr" "xorg.libXi" ]; };
+  "glutin_glx_sys" = {
+    build = [ "libGL" ];
+    env = pkgs: {
+      LD_LIBRARY_PATH = with pkgs; "/run/opengl-driver/lib/:${lib.makeLibraryPath ([libGL libGLU])}";
+    };
+  };
+  "wayland-egl" = { build = [ "egl-wayland" ]; };
+}

mill-scale.nix

@@ -4,8 +4,8 @@
 
 { lib, src, config, flakelight, inputs, ... }:
 let
-  inherit (builtins) elem readFile pathExists isAttrs attrNames match any;
-  inherit (lib) map mkDefault mkIf mkMerge mkOption warnIf assertMsg optionalAttrs types optionalString genAttrs hasInfix intersectLists foldl attrVals;
+  inherit (builtins) elem readFile pathExists isAttrs match any;
+  inherit (lib) map mkDefault mkIf mkMerge mkOption warnIf assertMsg optionalAttrs types optionalString genAttrs hasInfix intersectLists attrVals;
   inherit (lib.fileset) fileFilter toSource unions;
   inherit (flakelight.types) fileset function optFunctionTo;
 
@@ -19,33 +19,11 @@ let
   hasExamples = pathExists (src + /examples);
   hasDefaultPackage = pathExists (src + /nix/package.nix);
 
-  cargoLockDeps =
-    if pathExists (src + /Cargo.lock) then
-      let
-        cargoLock = fromTOML (readFile (src + /Cargo.lock));
-      in
-      map (package: package.name) cargoLock.package
-    else [ ];
-  availableAutoDeps = import ./autodeps.nix;
-  detectedDeps = intersectLists cargoLockDeps (attrNames availableAutoDeps);
-  mergedDetectedDeps =
-    if config.autodeps then
-      foldl
-        (merged: dep: {
-          build = merged.build ++ (availableAutoDeps.${dep}.build or [ ]);
-          native = merged.native ++ (availableAutoDeps.${dep}.native or [ ]);
-        })
-        {
-          build = [ ];
-          native = [ ];
-        }
-        detectedDeps else {
-      build = [ ];
-      native = [ ];
-    };
+  autoDeps = (import ./autodeps { inherit lib src config; });
   buildDeps = pkgs: {
-    buildInputs = (attrVals mergedDetectedDeps.build pkgs) ++ (config.buildInputs pkgs);
-    nativeBuildInputs = with pkgs; [ pkg-config ] ++ (attrVals mergedDetectedDeps.native pkgs) ++ (config.nativeBuildInputs pkgs);
+    buildInputs = (autoDeps pkgs).buildInputs ++ (config.buildInputs pkgs);
+    nativeBuildInputs = (autoDeps pkgs).nativeBuildInputs ++ (config.nativeBuildInputs pkgs);
+    env = (autoDeps pkgs).env // (config.buildEnv pkgs);
   };
 in
 warnIf (! builtins ? readFileType) "Unsupported Nix version in use."
@@ -87,6 +65,11 @@ warnIf (! builtins ? readFileType) "Unsupported Nix version in use."
       default = pkgs: [ ];
       description = "native build inputs for the package";
     };
+    buildEnv = mkOption {
+      type = function;
+      default = pkgs: { };
+      description = "build environent variables for the package";
+    };
     tools = mkOption {
       type = function;
       default = pkgs: with pkgs; [ cargo-edit bacon ];
@@ -292,9 +275,9 @@ warnIf (! builtins ? readFileType) "Unsupported Nix version in use."
             ++ (buildDeps pkgs).buildInputs
             ++ (buildDeps pkgs).nativeBuildInputs;
 
-          env = { rustPlatform, ... }: {
+          env = { rustPlatform, pkgs, ... }: {
             RUST_SRC_PATH = toString rustPlatform.rustLibSrc;
-          };
+          } // (buildDeps pkgs).env;
         };
         miri = {
           packages = pkgs: with pkgs; [ miriRustToolchain ]