exewrapper: add comments about PYTHONHOME
This has been a repeating source of confusion for users of HackableMercurial.
Note that users of HackableMercurial should *not* and are *not* expected to set
PYTHONHOME.
--- a/mercurial/exewrapper.c Wed Oct 14 12:23:04 2015 +0200
+++ b/mercurial/exewrapper.c Wed Oct 14 12:23:49 2015 +0200
@@ -67,10 +67,19 @@
}
pydll = NULL;
+ /*
+ We first check, that environment variable PYTHONHOME is *not* set.
+ This just mimicks the behavior of the regular python.exe, which uses
+ PYTHONHOME to find its installation directory (if it has been set).
+ Note: Users of HackableMercurial are expected to *not* set PYTHONHOME!
+ */
if (GetEnvironmentVariable("PYTHONHOME", envpyhome,
sizeof(envpyhome)) == 0)
{
- /* environment var PYTHONHOME is not set */
+ /*
+ Environment var PYTHONHOME is *not* set. Let's see if we are
+ running inside a HackableMercurial.
+ */
p = strrchr(pyhome, '\\');
if (p == NULL) {