D11080: run-test: act that we requires MSYS to run the test on Windows

[marmoute (Pierre-Yves David)]

marmoute created this revision.
Herald added a reviewer: hg-reviewers.
Herald added a subscriber: mercurial-patches.

REVISION SUMMARY
  If this ever change we can drop that constrains, however for now it seems clear
  to be clear about this limitation.

REPOSITORY
  rHG Mercurial

BRANCH
  default

REVISION DETAIL
  https://phab.mercurial-scm.org/D11080

AFFECTED FILES
  tests/run-tests.py

CHANGE DETAILS

diff --git a/tests/run-tests.py b/tests/run-tests.py
--- a/tests/run-tests.py
+++ b/tests/run-tests.py
@@ -3991,6 +3991,15 @@
 
 
 if __name__ == '__main__':
+    if WINDOWS and not os.getenv('MSYSTEM'):
+        print('cannot run test on Windows without MSYSTEM', file=sys.stderr)
+        print(
+            '(if you need to do so contact the mercurial devs: '
+            'mercurial at mercurial-scm.org)',
+            file=sys.stderr,
+        )
+        sys.exit(255)
+
     runner = TestRunner()
 
     try:



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