Choose CI Python version with GitHub Action

Signed-off-by: Alex Nelson <[email protected]>

Author: ajnelson-nist

.github/workflows/ci.yml

@@ -34,4 +34,4 @@ jobs:
     - name: Start from clean state
       run: make clean
     - name: Run tests
-      run: make check
+      run: make PYTHON3=python check

Makefile

@@ -13,10 +13,7 @@
 
 SHELL := /bin/bash
 
-PYTHON3 ?= $(shell which python3.8 2>/dev/null || which python3.7 2>/dev/null || which python3.6 2>/dev/null || which python3)
-ifeq ($(PYTHON3),)
-$(error python3 not found)
-endif
+PYTHON3 ?= python3
 
 # This recipe intentionally blank.
 all:

tests/Makefile

@@ -15,10 +15,7 @@ SHELL := /bin/bash
 
 top_srcdir := $(shell cd .. ; pwd)
 
-PYTHON3 ?= $(shell which python3.8 2>/dev/null || which python3.7 2>/dev/null || which python3.6 2>/dev/null || which python3)
-ifeq ($(PYTHON3),)
-$(error python3 not found)
-endif
+PYTHON3 ?= python3
 
 all: \
   .venv.done.log