add inject for lib2

src/default.nix

@@ -439,8 +439,7 @@
         (dreamOverrides."${dreamLock._generic.subsystem}" or {})
         (args.packageOverrides or {});
 
-      inject =
-        utils.dreamLock.decompressDependencyGraph args.inject or {};
+      inject = args.inject or {};
     };
 
     allOutputs = builderOutputs;
@@ -587,6 +586,7 @@
 
   # transform a list of resolved projects to buildable outputs
   realizeProjects = {
+    inject ? {},
     translatedProjects ? translateProjects {inherit pname settings source;},
     # alternative way of calling (for debugging)
     pname ? null,
@@ -610,7 +610,7 @@
     # extends each package with a `.resolve` attribute
     outputsForProject = proj: let
       outputs = makeOutputsForDreamLock rec {
-        inherit packageOverrides;
+        inherit inject packageOverrides;
         dreamLock = proj.dreamLock;
         sourceOverrides = oldSources: (defaultSourceOverride proj.dreamLock);
       };

src/libV2.nix

@@ -92,6 +92,7 @@
   };
 
   makeFlakeOutputsFunc = {
+    inject ? {},
     pname ? throw "Please pass `pname` to makeFlakeOutputs",
     pkgs ? null,
     packageOverrides ? {},
@@ -168,7 +169,7 @@
         };
 
         realizedProjects = dream2nix.realizeProjects {
-          inherit packageOverrides translatedProjects source;
+          inherit inject packageOverrides translatedProjects source;
         };
 
         allOutputs =

src/utils/dream-lock.nix

@@ -170,7 +170,7 @@
           versions)
         [
           oldDependencyGraph
-          inject
+          (decompressDependencyGraph inject)
         ];
     in
       lib.recursiveUpdate lock {

tests/unit/default.nix

@@ -15,5 +15,5 @@ in
   ]
   ''
     export dream2nixSrc=${dream2nixWithExternals}
-    ${python3.pkgs.pytest}/bin/pytest ${self}/tests/unit "$@"
+    ${python3.pkgs.pytest}/bin/pytest ${self}/tests/unit -v "$@"
   ''

tests/unit/test_dream_lock.py

@@ -0,0 +1,33 @@
+import pytest
+import nix_ffi
+
+exampleDreamLock = dict(
+  _generic = dict(
+    defaultPackage="example",
+    packages=dict(
+      example="1.2.3",
+    ),
+    subsystem = "nodejs",
+    _subsystemAttrs = {},
+  ),
+  dependencies = {},
+  cyclicDependencies = {},
+  sources = {},
+)
+
+def test_dream_lock_inject():
+  result = nix_ffi.callNixFunction(
+    'utils.dreamLock.injectDependencies',
+    dreamLock=exampleDreamLock,
+    inject=dict(
+      example={
+        "1.2.3": [
+          [ "injected-package", "1.0.0" ]
+        ]
+      }
+    ),
+  )
+  assert result['dependencies']['example']['1.2.3'] == [dict(
+    name="injected-package",
+    version="1.0.0",
+  )]