indygreg created this revision.
Herald added subscribers: mercurial-devel, mjpieters.
Herald added a reviewer: hg-reviewers.

REVISION SUMMARY
  Debian appears to cripple the venv module by default by
  removing the associated ensurepip functionality. (The module
  isn't present at all.) This caused test-install.t to fail when
  using the Debian python3 unless the python3-venv package was
  installed.
  
  This commit introduces a new hghave requirement for detecting
  ensurepip and makes the Python 3 install variant conditional on
  its presence. This should make test-install.t pass when
  using an incomplete Debian Python.

REPOSITORY
  rHG Mercurial

BRANCH
  stable

REVISION DETAIL
  https://phab.mercurial-scm.org/D7228

AFFECTED FILES
  tests/hghave.py
  tests/test-install.t

CHANGE DETAILS

diff --git a/tests/test-install.t b/tests/test-install.t
--- a/tests/test-install.t
+++ b/tests/test-install.t
@@ -241,12 +241,15 @@
 shell environment in order to make the virtualenv work reliably.
 
 On Python 3, we use the venv module, which is part of the standard library.
+But some Linux distros strip out this module's functionality involving pip,
+so we have to look for the ensurepip module, which these distros strip out
+completely.
 On Python 2, we use the 3rd party virtualenv module, if available.
 
   $ cd $TESTTMP
   $ unset PYTHONPATH
 
-#if py3
+#if py3 ensurepip
   $ "$PYTHON" -m venv installenv >> pip.log
 
 Note: we use this weird path to run pip and hg to avoid platform differences,
diff --git a/tests/hghave.py b/tests/hghave.py
--- a/tests/hghave.py
+++ b/tests/hghave.py
@@ -829,6 +829,17 @@
     return os.path.exists('/dev/full')
 
 
+@check("ensurepip", "ensurepip module")
+def has_ensurepip():
+    try:
+        import ensurepip
+
+        ensurepip.bootstrap
+        return True
+    except ImportError:
+        return False
+
+
 @check("virtualenv", "Python virtualenv support")
 def has_virtualenv():
     try:



To: indygreg, #hg-reviewers
Cc: mjpieters, mercurial-devel
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