policy: relax the default for in-place build
We're going to make the 'c' policy more strict, where no missing attribute
will be allowed. Since we want to run 'hg bisect' without rebuilding the C
extension modules, we'll need a looser policy for development environment.
The default for system installation isn't changed.
Note that the current 'c' policy is practically 'allow'-ish as we have lots
of adhoc fallbacks to pure functions.
--- a/mercurial/policy.py Thu May 11 14:52:02 2017 -0700
+++ b/mercurial/policy.py Wed Apr 26 23:02:43 2017 +0900
@@ -18,8 +18,10 @@
# cffi-allow - allow pure Python implementation if cffi version is missing
# py - only load pure Python modules
#
-# By default, require the C extensions for performance reasons.
-policy = b'c'
+# By default, fall back to the pure modules so the in-place build can
+# run without recompiling the C extensions. This will be overridden by
+# __modulepolicy__ generated by setup.py.
+policy = b'allow'
policynoc = (b'cffi', b'cffi-allow', b'py')
policynocffi = (b'c', b'py')
--- a/setup.py Thu May 11 14:52:02 2017 -0700
+++ b/setup.py Wed Apr 26 23:02:43 2017 +0900
@@ -372,6 +372,9 @@
def run(self):
if self.distribution.pure:
modulepolicy = 'py'
+ elif self.build_lib == '.':
+ # in-place build should run without rebuilding C extensions
+ modulepolicy = 'allow'
else:
modulepolicy = 'c'
with open("mercurial/__modulepolicy__.py", "w") as f: