[Request] [+ ] D9815: run-tests: work around the Windows firewall popup for server processes

[mharbison72 (Matt Harbison)]

mharbison72 created this revision.
Herald added a reviewer: hg-reviewers.
Herald added a subscriber: mercurial-patches.

REVISION SUMMARY
  Windows doesn't have a `python3` executable, so cc0b332ab9fc <https://phab.mercurial-scm.org/rHGcc0b332ab9fc60aeda2a4b52b1ff8f5dd41376b1> attempted to work
  around the issue by copying the current python to `python3.exe`.  That put it in
  `_tmpbindir` because of failures in `test-run-tests.t` when using `_bindir`,
  which looked like a process was trying to open it to write out a copy while it
  was in use.  (Interestingly, I couldn't reproduce this running the test by
  itself in a loop for a couple of hours, but it happens constantly when running
  all tests.)  The problem with using `_tmpbindir` is that it is the randomly
  generated path for the test run, and instead of Windows Firewall remembering the
  executable signature or image hash when allowing the process to open a server
  port, it apparently remembers the image path.  That means every run will trigger
  a popup to allow it, which is bad for firing off a test run and walking away.
  
  I tried to symlink to the python executable, but that currently requires admin
  priviledges[1].  This will prompt the first time if the underlying python binary
  has never opened a server port, but appears to avoid it on subsequent runs.
  
  [1] https://bugs.python.org/issue40687

REPOSITORY
  rHG Mercurial

BRANCH
  default

REVISION DETAIL
  https://phab.mercurial-scm.org/D9815

AFFECTED FILES
  .hgignore
  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
@@ -3470,14 +3470,13 @@
                         raise
         else:
             # Windows doesn't have `python3.exe`, and MSYS cannot understand the
-            # reparse point with that name provided by Microsoft.  Copy the
-            # current interpreter to PATH with that name so the shebang lines
-            # work.
+            # reparse point with that name provided by Microsoft.  Create a
+            # simple script on PATH with that name that delegates to the py3
+            # launcher so the shebang lines work.
             if os.getenv('MSYSTEM'):
-                shutil.copy(
-                    sys.executable,
-                    _bytes2sys(self._tmpbindir + b'/python3.exe'),
-                )
+                with open(osenvironb[b'RUNTESTDIR'] + b'/python3', 'wb') as f:
+                    f.write(b'#!/bin/sh\n')
+                    f.write(b'py -3 "$@"\n')
 
             exedir, exename = os.path.split(sysexecutable)
             vlog(
diff --git a/.hgignore b/.hgignore
--- a/.hgignore
+++ b/.hgignore
@@ -26,6 +26,7 @@
 tests/hypothesis-generated
 tests/annotated
 tests/exceptions
+tests/python3
 tests/*.err
 tests/htmlcov
 build



To: mharbison72, #hg-reviewers
Cc: mercurial-patches, mercurial-devel
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