gitlab-ci: Check for dynamic msys2 dependencies

Both #20878 and #21196 were caused by unwanted dynamic dependencies
being introduced by boot libraries. Ensure that we catch this in CI by
attempting to run GHC in an environment with a minimal PATH.

(cherry picked from commit fcc7dc4c2848d46439bcbfae3f9eaf0a1f400ab4)

1 files changed, 13 insertions, 0 deletions

diff --git a/.gitlab/ci.sh b/.gitlab/ci.sh
index 30dd0ff757..24de6cead4 100755
--- a/.gitlab/ci.sh
+++ b/.gitlab/ci.sh
@@ -445,6 +445,17 @@ function determine_metric_baseline() {
   info "Using $PERF_BASELINE_COMMIT for performance metric baseline..."
 }
 
+function check_msys2_deps() {
+  # Ensure that GHC on Windows doesn't have any dynamic dependencies on msys2
+  case "$(uname)" in
+    MSYS_*|MINGW*)
+      sysroot="$(cygpath "$SYSTEMROOT")"
+      PATH="$sysroot/System32:$sysroot;$sysroot/Wbem" $@ \
+          || fail "'$@' failed; there may be unwanted dynamic dependencies."
+      ;;
+  esac
+}
+
 # If RELEASE_JOB = yes then we skip builds with a validate flavour.
 # This has the effect of
 #  (1) Skipping validate jobs when trying to do release builds
@@ -466,6 +477,7 @@ function test_make() {
     return
   fi
 
+  check_msys2_deps inplace/bin/ghc-stage2 --version
   check_release_build
 
   run "$MAKE" test_bindist TEST_PREP=YES
@@ -496,6 +508,7 @@ function test_hadrian() {
     return
   fi
 
+  check_msys2_deps _build/stage1/bin/ghc --version
   check_release_build
 
   # Ensure that statically-linked builds are actually static