[PATCH 05/31] tests/docker: make docker engine choice entirely configure driven

[Alex Bennée]

Since 0b1a649047 (tests/docker: use direct RUNC call to build
containers) we ended up with the potential for the remaining docker.py
script calls to deviate from the direct RUNC calls. Fix this by
dropping the use of ENGINE in the makefile and rely entirely on what
we detect at configure time.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
 configure                     | 1 -
 tests/docker/Makefile.include | 7 ++-----
 2 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/configure b/configure
index e08127045d..707132a3ae 100755
--- a/configure
+++ b/configure
@@ -1694,7 +1694,6 @@ if test -n "$gdb_bin"; then
 fi
 
 if test "$container" != no; then
-    echo "ENGINE=$container" >> $config_host_mak
     echo "RUNC=$runc" >> $config_host_mak
 fi
 echo "SUBDIRS=$subdirs" >> $config_host_mak
diff --git a/tests/docker/Makefile.include b/tests/docker/Makefile.include
index dfabafab92..035d272be9 100644
--- a/tests/docker/Makefile.include
+++ b/tests/docker/Makefile.include
@@ -17,8 +17,7 @@ endif
 DOCKER_REGISTRY := $(if $(REGISTRY),$(REGISTRY),$(DOCKER_DEFAULT_REGISTRY))
 
 RUNC ?= docker
-ENGINE ?= auto
-DOCKER_SCRIPT=$(SRC_PATH)/tests/docker/docker.py --engine $(ENGINE)
+DOCKER_SCRIPT=$(SRC_PATH)/tests/docker/docker.py --engine $(RUNC)
 
 CUR_TIME := $(shell date +%Y-%m-%d-%H.%M.%S.$$$$)
 DOCKER_SRC_COPY := $(BUILD_DIR)/docker-src.$(CUR_TIME)
@@ -158,7 +157,7 @@ $(foreach i,$(filter-out 
$(DOCKER_PARTIAL_IMAGES),$(DOCKER_IMAGES)), \
 )
 
 docker:
-       @echo 'Build QEMU and run tests inside Docker or Podman containers'
+       @echo 'Build QEMU and run tests inside $(RUNC) containers'
        @echo
        @echo 'Available targets:'
        @echo
@@ -198,8 +197,6 @@ docker:
        @echo '    EXECUTABLE=<path>    Include executable in image.'
        @echo '    EXTRA_FILES="<path> [... <path>]"'
        @echo '                         Include extra files in image.'
-       @echo '    ENGINE=auto/docker/podman'
-       @echo '                         Specify which container engine to run.'
        @echo '    REGISTRY=url         Cache builds from registry 
(default:$(DOCKER_REGISTRY))'
 
 docker-help: docker
-- 
2.39.2