add settings argument to lib2.makeFlakeOutputs

src/default.nix

@@ -489,15 +489,18 @@ let
 
   resolveProjectsFromSource =
     {
-      discoveredProjects ? dlib.discoverers.discoverProjects { inherit tree; },
+      discoveredProjects ? dlib.discoverers.discoverProjects
+        {inherit settings tree;},
       source ?
         throw "Pass either `source` or `tree` to resolveProjectsFromSource",
       tree ? dlib.prepareSourceTree { inherit source; },
       pname,
+      settings ? [],
     }@args:
 
     let
 
+      # This influences error messages only
       flakeMode = ! builtins ? currentSystem;
 
       getTranslator = subsystem: translatorName:
@@ -548,7 +551,7 @@ let
             impure = isImpure project translator;
             key = getProjectKey project;
             resolved = isResolved self;
-            translator = l.head project.translators;
+            translator = project.translator or (l.head project.translators);
           }; in self))
           discoveredProjects;
 
@@ -610,8 +613,7 @@ let
         if flakeMode then
           b.trace ''
             ${"\n"}
-            The dream-lock.json for some projects doesn't exist or is outdated.
+            Evaluating project data on the fly...
-            ...Falling back to on-the-fly evaluation (possibly slow).
             To speed up future evalutations run once:
               nix run .#resolve
           ''
@@ -619,8 +621,7 @@ let
         else
           b.trace ''
             ${"\n"}
-            The dream-lock.json for some projects doesn't exist or is outdated.
+            Evaluating project data on the fly...
-            ...Falling back to on-the-fly evaluation (possibly slow).
           ''
           dreamLocks
       else
@@ -629,11 +630,13 @@ let
   # transform a list of resolved projects to buildable outputs
   realizeProjects =
     {
-      dreamLocks ? resolveProjectsFromSource { inherit pname source; },
+      dreamLocks ? resolveProjectsFromSource { inherit pname settings source; },
 
       # alternative way of calling (for debugging)
       pname ? null,
       source ? null,
+
+      settings ? [],
     }:
     let
 

src/discoverers/default.nix

@@ -17,11 +17,40 @@ let
     {
       source ? throw "Pass either `source` or `tree` to discoverProjects",
       tree ? dlib.prepareSourceTree { inherit source; },
-    }:
+      settings ? [],
-      l.flatten
+    }: let
-        (l.map
+      discovered =
-          (discoverer: discoverer.discover { inherit tree; })
+        l.flatten
-          allDiscoverers);
+          (l.map
+            (discoverer: discoverer.discover { inherit tree; })
+            allDiscoverers);
+    in
+      applyProjectSettings discovered settings;
+
+  applyProjectSettings = projects: settingsList:
+    let
+      settingsListForProject = project:
+        l.filter
+          (settings:
+            if ! settings ? filter then true
+            else settings.filter project)
+          settingsList;
+
+      applySettings = project: settings:
+        l.recursiveUpdate project settings;
+
+      applyAllSettings = project:
+        l.foldl'
+          (proj: settings: applySettings proj settings)
+          project
+          (settingsListForProject project);
+
+      settingsApplied =
+        l.forEach projects
+          (proj: applyAllSettings proj);
+
+    in settingsApplied;
+
 
   discoverers = l.genAttrs subsystems (subsystem:
     (import (./. + "/${subsystem}") { inherit dlib lib subsystem; })
@@ -30,6 +59,7 @@ in
 
 {
   inherit
+    applyProjectSettings
     discoverProjects
     discoverers
   ;

src/libV2.nix

@@ -108,6 +108,7 @@ let
     {
       pname ? throw "Please pass `pname` to makeFlakeOutputs",
       pkgs ? null,
+      settings ? [],
       source,
       systems ? [],
       translator ? null,
@@ -122,6 +123,7 @@ let
       forAllSystems = f: b.mapAttrs f allPkgs;
       dream2nixFor = forAllSystems (dream2nixForSystem config);
       discoveredProjects = dlib.discoverers.discoverProjects {
+        inherit settings;
         tree = dlib.prepareSourceTree { inherit source; };
       };
 
@@ -132,7 +134,7 @@ let
               dream2nix = dream2nixFor."${system}";
 
               dreamLocks = dream2nix.resolveProjectsFromSource {
-                inherit pname source;
+                inherit pname settings source;
               };
             in
               dream2nix.realizeProjects {