Support testing with Python 3 in the OS X buildslave.

* tools/buildbot/slaves/svn-x64-macosx/setenv.sh
  (SVNBB_PYTHON3ENV): New environment variable.
* tools/buildbot/slaves/svn-x64-macosx/svncheck.sh:
   Activate a Python 3 virtualenv when given the 'pythoh3' argument.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1809586 13f79535-47bb-0310-9956-ffa450edef68

tools/buildbot/slaves/svn-x64-macosx/setenv.sh

@@ -29,6 +29,7 @@
 ##     SVNBB_APR_20_DEV         Path of APR-2.0
 ##     SVNBB_JUNIT              The path of the junit.jar
 ##     SVNBB_PARALLEL           Optional: parallelization; defaults to 2
+##     SVNBB_PYTHON3ENV         Optional: Python 3 virtual environment
 ##
 ## The invoking script will set local variable named ${scripts} that
 ## is the absolute path the parent of this file.
@@ -48,6 +49,7 @@ export SVNBB_APR_15
 export SVNBB_APR_20_DEV
 export SVNBB_JUNIT
 export SVNBB_PARALLEL
+export SVNBB_PYTHON3ENV
 
 
 # Set the absolute source path

tools/buildbot/slaves/svn-x64-macosx/svncheck.sh

@@ -63,6 +63,7 @@ scripts=$(cd $(dirname "$0") && pwd)
 . ${scripts}/setenv.sh
 
 # Parse arguments to find out which tests we should run
+use_python3=false
 check_local=false
 check_svn=false
 check_dav=false
@@ -74,6 +75,7 @@ check_bdb=false
 
 while [ ! -z "$1" ]; do
     case "$1" in
+        python3) use_python3=true;;
         local)   check_local=true;;
         svn)     check_svn=true;;
         dav)     check_dav=true;;
@@ -87,6 +89,8 @@ while [ ! -z "$1" ]; do
     shift
 done
 
+${use_python3} && test -n "${SVNBB_PYTHON3ENV}" && . ${SVNBB_PYTHON3ENV}/bin/activate
+
 ${check_local} && check_tests local
 ${check_svn} && check_tests svn
 ${check_dav} && check_tests dav