stefankoncarevic
diff --git a/‎.ci/generate-buildkite-pipeline-premerge‎
Lines changed: 2 additions & 3 deletions b/‎.ci/generate-buildkite-pipeline-premerge‎
Lines changed: 2 additions & 3 deletions
diff --git a/‎.ci/generate_test_report.py‎
Lines changed: 88 additions & 14 deletions b/‎.ci/generate_test_report.py‎
Lines changed: 88 additions & 14 deletions
@@ -128,9 +128,8 @@ if [[ "${windows_projects}" != "" ]]; then
         limit: 2
   timeout_in_minutes: 150
   env:
-    CC: 'cl'
-    CXX: 'cl'
-    LD: 'link'
+    MAX_PARALLEL_COMPILE_JOBS: '16'
+    MAX_PARALLEL_LINK_JOBS: '4'
   commands:
   - 'C:\\BuildTools\\Common7\\Tools\\VsDevCmd.bat -arch=amd64 -host_arch=amd64'
   - 'bash .ci/monolithic-windows.sh "$(echo ${windows_projects} | tr ' ' ';')" "$(echo ${windows_check_targets})"'
 
@@ -19,12 +19,13 @@ def junit_from_xml(xml):
 
 class TestReports(unittest.TestCase):
     def test_title_only(self):
-        self.assertEqual(_generate_report("Foo", []), ("", "success"))
+        self.assertEqual(_generate_report("Foo", 0, []), ("", "success"))
 
     def test_no_tests_in_testsuite(self):
         self.assertEqual(
             _generate_report(
                 "Foo",
+                1,
                 [
                     junit_from_xml(
                         dedent(
@@ -45,6 +46,7 @@ def test_no_failures(self):
         self.assertEqual(
             _generate_report(
                 "Foo",
+                0,
                 [
                     junit_from_xml(
                         dedent(
@@ -70,10 +72,51 @@ def test_no_failures(self):
             ),
         )
 
+    def test_no_failures_build_failed(self):
+        self.assertEqual(
+            _generate_report(
+                "Foo",
+                1,
+                [
+                    junit_from_xml(
+                        dedent(
+                            """\
+          <?xml version="1.0" encoding="UTF-8"?>
+          <testsuites time="0.00">
+          <testsuite name="Passed" tests="1" failures="0" skipped="0" time="0.00">
+          <testcase classname="Bar/test_1" name="test_1" time="0.00"/>
+          </testsuite>
+          </testsuites>"""
+                        )
+                    )
+                ],
+                buildkite_info={
+                    "BUILDKITE_ORGANIZATION_SLUG": "organization_slug",
+                    "BUILDKITE_PIPELINE_SLUG": "pipeline_slug",
+                    "BUILDKITE_BUILD_NUMBER": "build_number",
+                    "BUILDKITE_JOB_ID": "job_id",
+                },
+            ),
+            (
+                dedent(
+                    """\
+              # Foo
+
+              * 1 test passed
+
+              All tests passed but another part of the build **failed**.
+
+              [Download](https://buildkite.com/organizations/organization_slug/pipelines/pipeline_slug/builds/build_number/jobs/job_id/download.txt) the build's log file to see the details."""
+                ),
+                "error",
+            ),
+        )
+
     def test_report_single_file_single_testsuite(self):
         self.assertEqual(
             _generate_report(
                 "Foo",
+                1,
                 [
                     junit_from_xml(
                         dedent(
@@ -166,6 +209,7 @@ def test_report_single_file_multiple_testsuites(self):
         self.assertEqual(
             _generate_report(
                 "ABC and DEF",
+                1,
                 [
                     junit_from_xml(
                         dedent(
@@ -198,6 +242,7 @@ def test_report_multiple_files_multiple_testsuites(self):
         self.assertEqual(
             _generate_report(
                 "ABC and DEF",
+                1,
                 [
                     junit_from_xml(
                         dedent(
@@ -238,6 +283,7 @@ def test_report_dont_list_failures(self):
         self.assertEqual(
             _generate_report(
                 "Foo",
+                1,
                 [
                     junit_from_xml(
                         dedent(
@@ -272,6 +318,7 @@ def test_report_dont_list_failures_link_to_log(self):
         self.assertEqual(
             _generate_report(
                 "Foo",
+                1,
                 [
                     junit_from_xml(
                         dedent(
@@ -312,6 +359,7 @@ def test_report_size_limit(self):
         self.assertEqual(
             _generate_report(
                 "Foo",
+                1,
                 [
                     junit_from_xml(
                         dedent(
@@ -351,12 +399,18 @@ def test_report_size_limit(self):
 # and output will not be.
 def _generate_report(
     title,
+    return_code,
     junit_objects,
     size_limit=1024 * 1024,
     list_failures=True,
     buildkite_info=None,
 ):
     if not junit_objects:
+        # Note that we do not post an empty report, therefore we can ignore a
+        # non-zero return code in situations like this.
+        #
+        # If we were going to post a report, then yes, it would be misleading
+        # to say we succeeded when the final return code was non-zero.
         return ("", "success")
 
     failures = {}
@@ -385,7 +439,11 @@ def _generate_report(
     if not tests_run:
         return ("", None)
 
-    style = "error" if tests_failed else "success"
+    style = "success"
+    # Either tests failed, or all tests passed but something failed to build.
+    if tests_failed or return_code != 0:
+        style = "error"
+
     report = [f"# {title}", ""]
 
     tests_passed = tests_run - tests_skipped - tests_failed
@@ -400,17 +458,17 @@ def plural(num_tests):
     if tests_failed:
         report.append(f"* {tests_failed} {plural(tests_failed)} failed")
 
-    if not list_failures:
-        if buildkite_info is not None:
-            log_url = (
-                "https://buildkite.com/organizations/{BUILDKITE_ORGANIZATION_SLUG}/"
-                "pipelines/{BUILDKITE_PIPELINE_SLUG}/builds/{BUILDKITE_BUILD_NUMBER}/"
-                "jobs/{BUILDKITE_JOB_ID}/download.txt".format(**buildkite_info)
-            )
-            download_text = f"[Download]({log_url})"
-        else:
-            download_text = "Download"
+    if buildkite_info is not None:
+        log_url = (
+            "https://buildkite.com/organizations/{BUILDKITE_ORGANIZATION_SLUG}/"
+            "pipelines/{BUILDKITE_PIPELINE_SLUG}/builds/{BUILDKITE_BUILD_NUMBER}/"
+            "jobs/{BUILDKITE_JOB_ID}/download.txt".format(**buildkite_info)
+        )
+        download_text = f"[Download]({log_url})"
+    else:
+        download_text = "Download"
 
+    if not list_failures:
         report.extend(
             [
                 "",
@@ -435,11 +493,23 @@ def plural(num_tests):
                         "</details>",
                     ]
                 )
+    elif return_code != 0:
+        # No tests failed but the build was in a failed state. Bring this to the user's
+        # attention.
+        report.extend(
+            [
+                "",
+                "All tests passed but another part of the build **failed**.",
+                "",
+                f"{download_text} the build's log file to see the details.",
+            ]
+        )
 
     report = "\n".join(report)
     if len(report.encode("utf-8")) > size_limit:
         return _generate_report(
             title,
+            return_code,
             junit_objects,
             size_limit,
             list_failures=False,
@@ -449,9 +519,10 @@ def plural(num_tests):
     return report, style
 
 
-def generate_report(title, junit_files, buildkite_info):
+def generate_report(title, return_code, junit_files, buildkite_info):
     return _generate_report(
         title,
+        return_code,
         [JUnitXml.fromfile(p) for p in junit_files],
         buildkite_info=buildkite_info,
     )
@@ -463,6 +534,7 @@ def generate_report(title, junit_files, buildkite_info):
         "title", help="Title of the test report, without Markdown formatting."
     )
     parser.add_argument("context", help="Annotation context to write to.")
+    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()
 
@@ -477,7 +549,9 @@ def generate_report(title, junit_files, buildkite_info):
     if len(buildkite_info) != len(env_var_names):
         buildkite_info = None
 
-    report, style = generate_report(args.title, args.junit_files, buildkite_info)
+    report, style = generate_report(
+        args.title, args.return_code, args.junit_files, buildkite_info
+    )
 
     if report:
         p = subprocess.Popen(