[PATCH v5 07/11] runtest.sh: Prepare Python bindings for in-tree testing

Export the in-tree Python binding directory so tests can import the build
output without installing it.

Also export the Python interpreter selected by the build as
DTRACE_PYTHON.  runtest.sh preserves that setting when invoked by make,
accepts it from a caller that sources the runner, and otherwise falls
back to PYTHON or python3.

Signed-off-by: Alan Maguire <[email protected]>
---
 Makecheck  | 3 +++
 runtest.sh | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/Makecheck b/Makecheck
index 928fadb5..87db1065 100644
--- a/Makecheck
+++ b/Makecheck
@@ -19,6 +19,9 @@
 # DTrace:
 # check-qa-smoke: Runs the smoke testsuite.
 
+DTRACE_PYTHON := $(PYTHON)
+export DTRACE_PYTHON
+
 ifndef always-installed
 git_version=.git-version
 RUNTEST=./runtest.sh
diff --git a/runtest.sh b/runtest.sh
index 9f06a499..ca230ca7 100755
--- a/runtest.sh
+++ b/runtest.sh
@@ -19,6 +19,8 @@ unset CDPATH
 unset POSIXLY_CORRECT  # Interferes with 'wait'
 export LC_COLLATE="C"
 export dtrace="/usr/sbin/dtrace"
+DTRACE_PYTHON="${DTRACE_PYTHON:-${PYTHON:-python3}}"
+export DTRACE_PYTHON
 
 arch="$(uname -m)"
 
@@ -552,6 +554,7 @@ export LANGUAGE=C
 
 if [[ -z $USE_INSTALLED ]]; then
     dtrace="$(pwd)/build*/dtrace"
+    PYTHONPATH="$(pwd)/build/bindings/python${PYTHONPATH:+:$PYTHONPATH}"
     test_libdir="$(pwd)/build/dlibs"
     test_ldflags="-L$(pwd)/build"
     test_cppflags="-I$(pwd)/include -I$(pwd)/uts/common -I$(pwd)/build -I$(pwd)/libdtrace -DARCH_$arch"
@@ -562,6 +565,7 @@ if [[ -z $USE_INSTALLED ]]; then
     dtprobed_flags="-n $helper_device -s${tmpdir}/run/dtrace -F"
     export DTRACE_DOF_INIT_DEVNAME="/dev/$helper_device"
     export DTRACE_OPT_DOFSTASHPATH="${tmpdir}/run/dtrace"
+    export PYTHONPATH
 
     if [[ -z $(eval echo $dtrace) ]]; then
     	echo "No dtraces available." >&2
-- 
2.43.5