hghave: add "absimport" feature to check "absolute_import" in __future__
This patch adds "absimport" feature to check whether "absolute_import"
exists in __future__, which means supporting module loading by
absolute name.
This check is needed for portability of test code using
"absolute_import", because Python earlier than 2.5 doesn't support it.
--- a/tests/hghave.py Tue Oct 01 17:43:54 2013 -0700
+++ b/tests/hghave.py Sat Oct 05 01:02:22 2013 +0900
@@ -277,6 +277,11 @@
def has_aix():
return sys.platform.startswith("aix")
+def has_absimport():
+ import __future__
+ from mercurial import util
+ return util.safehasattr(__future__, "absolute_import")
+
checks = {
"true": (lambda: True, "yak shaving"),
"false": (lambda: False, "nail clipper"),
@@ -318,4 +323,5 @@
"windows": (has_windows, "Windows"),
"msys": (has_msys, "Windows with MSYS"),
"aix": (has_aix, "AIX"),
+ "absimport": (has_absimport, "absolute_import in __future__"),
}