cmake: better logging

ci/azure-steps.yml

@@ -154,6 +154,11 @@ steps:
      where.exe python
      python --version
 
+     echo ""
+     echo "Locating cl, rc:"
+     where.exe cl
+     where.exe rc
+
      echo ""
      echo "=== Start running tests ==="
      # Starting from VS2019 Powershell(?) will fail the test run

run_project_tests.py

@@ -227,6 +227,10 @@ def validate_install(srcdir, installdir, compiler, env):
     for fname in found:
         if fname not in expected:
             ret_msg += 'Extra file {0} found.\n'.format(fname)
+    if ret_msg != '':
+        ret_msg += '\nInstall dir contents:\n'
+        for i in found:
+            ret_msg += '  - {}'.format(i)
     return ret_msg
 
 def log_text_file(logfile, testdir, stdo, stde):
@@ -670,6 +674,12 @@ def _run_tests(all_tests, log_name_base, failfast, extra_args):
                         # print the meson log if available since it's a superset
                         # of stdout and often has very useful information.
                         failing_logs.append(result.mlog)
+                    elif under_ci:
+                        # Always print the complete meson log when running in
+                        # a CI. This helps debugging issues that only occur in
+                        # a hard to reproduce environment
+                        failing_logs.append(result.mlog)
+                        failing_logs.append(result.stdo)
                     else:
                         failing_logs.append(result.stdo)
                     failing_logs.append(result.stde)