[PATCH v2] python: Unify python extension make command

[Nir Soffer]

Replace the python Makefile inplace target with environment variable,
fixing the tests after the top Makefile was simplified to use:

$(SUBDIRS):
	$(MAKE) -C $@

When running tox, we build sanlock extension inside the tox relevant tox
environment (e.g. .tox/py27/...). This will be helpful for supporting
python 3.

On Travis we still build in the python directory - sanlock import fails
if we build it elsewhere. This is not an issue for python 3 since on
Travis we have separate build for every python version.

Fixes: 6133e3471ca3
Signed-off-by: Nir Soffer <nsoffer(a)redhat.com&gt;
---
 .travis.yml     | 5 ++---
 python/Makefile | 5 +----
 tox.ini         | 4 +---
 3 files changed, 4 insertions(+), 10 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 8cc2859..37643f4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,8 @@
 dist: xenial
 language: python
+python: 2.7
 
 addons:
   apt:
     sources:
     - ubuntu-toolchain-r-test
@@ -14,10 +15,8 @@ before_install:
 
 env:
     - CC="gcc-8"
 
 script:
-    - make -C wdmd
-    - make -C src
-    - make -C python inplace
+    - make BUILDARGS="--build-lib=."
     - source tests/env.sh
     - pytest
diff --git a/python/Makefile b/python/Makefile
index 06c2201..c97e45a 100644
--- a/python/Makefile
+++ b/python/Makefile
@@ -3,14 +3,11 @@
 # This copyrighted material is made available to anyone wishing to use,
 # modify, copy, or redistribute it subject to the terms and conditions
 # of the GNU General Public License v.2.
 
 all:
-	python2 setup.py build
-
-inplace:
-	python2 setup.py build_ext --inplace
+	python2 setup.py build $(BUILDARGS)
 
 install:
 	python2 setup.py install --root=$(DESTDIR)
 
 clean:
diff --git a/tox.ini b/tox.ini
index f65f487..1c2349e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,17 +12,15 @@ skip_missing_interpreters = True
 passenv = USER
 setenv =
     LD_LIBRARY_PATH={env:PWD}/wdmd:{env:PWD}/src
     SANLOCK_PRIVILEGED=0
     SANLOCK_RUN_DIR=/tmp/sanlock
-    PYTHONPATH={env:PWD}/python
-sitepackages = True
 whitelist_externals = make
 deps =
     pytest==4.0
 commands =
-    make
+    make BUILDARGS="--build-lib={envsitepackagesdir}"
     pytest {posargs}
 
 [pytest]
 # Notes:
 # --basetemp: we must use /var/tmp as sanlock uses direct I/O.
-- 
2.17.2