dart: Spoof Git dependency version checks

3 files changed, 22 insertions, 2 deletions

diff --git a/pkgs/build-support/dart/build-dart-application/hooks/dart-config-hook.sh b/pkgs/build-support/dart/build-dart-application/hooks/dart-config-hook.sh
index ee610f673d2b9..3e901995237d9 100644
--- a/pkgs/build-support/dart/build-dart-application/hooks/dart-config-hook.sh
+++ b/pkgs/build-support/dart/build-dart-application/hooks/dart-config-hook.sh
@@ -4,7 +4,7 @@ dartConfigHook() {
     echo "Executing dartConfigHook"
 
     echo "Installing dependencies"
-    eval "$pubGetScript" --offline
+    eval doPubGet "$pubGetScript" --offline
 
     echo "Finished dartConfigHook"
 }
diff --git a/pkgs/build-support/dart/fetch-dart-deps/default.nix b/pkgs/build-support/dart/fetch-dart-deps/default.nix
index 9deb99648c08a..8c45722109bb2 100644
--- a/pkgs/build-support/dart/fetch-dart-deps/default.nix
+++ b/pkgs/build-support/dart/fetch-dart-deps/default.nix
@@ -1,6 +1,7 @@
 { stdenvNoCC
 , lib
 , makeSetupHook
+, writeShellScriptBin
 , dart
 , git
 , cacert
@@ -170,12 +171,26 @@ let
     '';
   } // buildDrvInheritArgs);
 
+  # As of Dart 3.0.0, Pub checks the revision of cached Git-sourced packages.
+  # Git must be wrapped to return a positive result, as the real .git directory is wiped
+  # to produce a deteministic dependency derivation output.
+  # https://github.com/dart-lang/pub/pull/3791/files#diff-1639c4669c428c26e68cfebd5039a33f87ba568795f2c058c303ca8528f62b77R631
+  gitSourceWrapper = writeShellScriptBin "git" ''
+    args=("$@")
+    if [[ "''${args[0]}" == "rev-list" && "''${args[1]}" == "--max-count=1" ]]; then
+      revision="''${args[''${#args[@]}-1]}"
+      echo "$revision"
+    else
+      ${git}/bin/git "''${args[@]}"
+    fi
+  '';
+
   hook = (makeSetupHook {
     # The setup hook should not be part of the fixed-output derivation.
     # Updates to the hook script should not change vendor hashes, and it won't
     # work at all anyway due to https://github.com/NixOS/nix/issues/6660.
     name = "${name}-dart-deps-setup-hook";
-    substitutions = { inherit deps; };
+    substitutions = { inherit gitSourceWrapper deps; };
     propagatedBuildInputs = [ dart git ];
     passthru = {
       files = deps.outPath;
diff --git a/pkgs/build-support/dart/fetch-dart-deps/setup-hook.sh b/pkgs/build-support/dart/fetch-dart-deps/setup-hook.sh
index 37ef74aa62ddd..689e0e8c5b5fc 100644
--- a/pkgs/build-support/dart/fetch-dart-deps/setup-hook.sh
+++ b/pkgs/build-support/dart/fetch-dart-deps/setup-hook.sh
@@ -39,3 +39,8 @@ _setupPubCache() {
         exit 1
     fi
 }
+
+# Performs the given pub get command with an appropriate environment.
+doPubGet() {
+    PATH="@gitSourceWrapper@/bin:$PATH" "$@"
+}