1 files changed, 35 insertions, 4 deletions
diff --git a/pkgs/build-support/flutter/default.nix b/pkgs/build-support/flutter/default.nix
index bcee31506df1e..dcf14438cb642 100644
--- a/pkgs/build-support/flutter/default.nix
+++ b/pkgs/build-support/flutter/default.nix
@@ -3,11 +3,13 @@
 , runCommand
 , makeWrapper
 , wrapGAppsHook
-, fetchDartDeps
 , buildDartApplication
 , cacert
 , glib
 , flutter
+, jq
+, yq
+, moreutils
 }:
 
 # absolutely no mac support for now
@@ -20,7 +22,6 @@
 
 (buildDartApplication.override {
   dart = flutter;
-  fetchDartDeps = fetchDartDeps.override { dart = flutter; };
 }) (args // {
   sdkSetupScript = ''
     # Pub needs SSL certificates. Dart normally looks in a hardcoded path.
@@ -50,7 +51,24 @@
 
   inherit pubGetScript;
 
-  nativeBuildInputs = (args.nativeBuildInputs or [ ]) ++ [ wrapGAppsHook ];
+  sdkSourceBuilders = {
+    # https://github.com/dart-lang/pub/blob/68dc2f547d0a264955c1fa551fa0a0e158046494/lib/src/sdk/flutter.dart#L81
+    "flutter" = name: runCommand "flutter-sdk-${name}" { } ''
+      for path in '${flutter}/packages/${name}' '${flutter}/bin/cache/pkg/${name}'; do
+        if [ -d "$path" ]; then
+          ln -s "$path" "$out"
+          break
+        fi
+      done
+
+      if [ ! -e "$out" ]; then
+        echo 1>&2 'The Flutter SDK does not contain the requested package: ${name}!'
+        exit 1
+      fi
+    '';
+  };
+
+  nativeBuildInputs = (args.nativeBuildInputs or [ ]) ++ [ wrapGAppsHook jq yq moreutils ];
   buildInputs = (args.buildInputs or [ ]) ++ [ glib ];
 
   dontDartBuild = true;
@@ -59,7 +77,15 @@
 
     mkdir -p build/flutter_assets/fonts
 
-    doPubGet flutter pub get --offline -v
+    # https://github.com/flutter/flutter/blob/3.13.8/packages/flutter_tools/lib/src/dart/pub.dart#L755
+    if [ "$(yq '.flutter.generate // false' pubspec.yaml)" = "true" ]; then
+      jq '.packages |= . + [{
+        name: "flutter_gen",
+        rootUri: "flutter_gen",
+        languageVersion: "2.12",
+      }]' .dart_tool/package_config.json | sponge .dart_tool/package_config.json
+    fi
+
     flutter build linux -v --release --split-debug-info="$debug" ${builtins.concatStringsSep " " (map (flag: "\"${flag}\"") flutterBuildFlags)}
 
     runHook postBuild
@@ -94,6 +120,11 @@
       fi
     done
 
+    # Install the package_config.json file.
+    # This is normally done by dartInstallHook, but we disable it.
+    mkdir -p "$pubcache"
+    cp .dart_tool/package_config.json "$pubcache/package_config.json"
+
     runHook postInstall
   '';