configure: Use the ./configure step to find pytest

Fixes #1544

Signed-off-by: Christian Decker <decker.christian@gmail.com>

Makefile

@@ -36,7 +36,6 @@ ifneq ($(NO_COMPAT),1)
 COMPAT_CFLAGS=-DCOMPAT_V052=1
 endif
 
-PYTEST := $(shell command -v pytest 2> /dev/null)
 PYTEST_OPTS := -v -x
 
 # This is where we add new features as bitcoin adds them.

configure

@@ -60,6 +60,16 @@ add_var()
     [ -z "$3" ] || echo "#define $1 $2" >> "$3"
 }
 
+find_pytest()
+{
+    PYTEST_BINS="pytest-3 pytest3 pytest py.test"
+    for PYTEST in $PYTEST_BINS; do
+	if [ "$(which $PYTEST)" != "" ] ; then
+	    break
+	fi
+    done
+}
+
 for opt in "$@"; do
     case "$opt" in
 	--reconfigure)
@@ -102,6 +112,8 @@ rm -f $CONFIG_VAR_FILE.$$
 $CONFIGURATOR --autotools-style --var-file=$CONFIG_VAR_FILE.$$ --header-file=$CONFIG_HEADER --configurator-cc="$CONFIGURATOR_CC" "$CC" $CWARNFLAGS $CDEBUGFLAGS
 mv $CONFIG_VAR_FILE.$$ $CONFIG_VAR_FILE
 
+find_pytest
+
 add_var PREFIX "$PREFIX"
 add_var CC "$CC"
 add_var CONFIGURATOR_CC "$CONFIGURATOR_CC"
@@ -110,3 +122,4 @@ add_var CDEBUGFLAGS "$CDEBUGFLAGS"
 add_var VALGRIND "$VALGRIND"
 add_var DEVELOPER "$DEVELOPER" $CONFIG_HEADER
 add_var COMPAT "$COMPAT" $CONFIG_HEADER
+add_var PYTEST "$(which $PYTEST)"