[CI] Add rich build information for github workflows

.ci/generate_test_report_github.py

@@ -0,0 +1,23 @@
+# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+# See https://llvm.org/LICENSE.txt for license information.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+"""Script to generate a build report for Github."""
+
+import argparse
+
+import generate_test_report_lib
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "title", help="Title of the test report, without Markdown formatting."
+    )
+    parser.add_argument("return_code", help="The build's return code.", type=int)
+    parser.add_argument("junit_files", help="Paths to JUnit report files.", nargs="*")
+    args = parser.parse_args()
+
+    report, _ = generate_test_report_lib.generate_report_from_files(
+        args.title, args.return_code, args.junit_files, None
+    )
+
+    print(report)

.ci/monolithic-linux.sh

@@ -40,6 +40,9 @@ function at-exit {
   then
     python3 "${MONOREPO_ROOT}"/.ci/generate_test_report_buildkite.py ":linux: Linux x64 Test Results" \
       "linux-x64-test-results" $retcode "${BUILD_DIR}"/test-results.*.xml
+  else
+    python3 "${MONOREPO_ROOT}"/.ci/generate_test_report_github.py ":linux: Linux x64 Test Results" \
+      $retcode "${BUILD_DIR}"/test-results.*.xml >> $GITHUB_STEP_SUMMARY
   fi
 }
 trap at-exit EXIT

.ci/monolithic-windows.sh

@@ -39,6 +39,9 @@ function at-exit {
   then
     python "${MONOREPO_ROOT}"/.ci/generate_test_report_buildkite.py ":windows: Windows x64 Test Results" \
       "windows-x64-test-results" $retcode "${BUILD_DIR}"/test-results.*.xml
+  else
+    python "${MONOREPO_ROOT}"/.ci/generate_test_report_github.py ":windows: Windows x64 Test Results" \
+      $retcode "${BUILD_DIR}"/test-results.*.xml >> $GITHUB_STEP_SUMMARY
   fi
 }
 trap at-exit EXIT