Adjust Makefile to detect TTY input for 'docker run' command

Signed-off-by: Mike Dougherty <[email protected]>

Author: mikedougherty

Diff for: Makefile

@@ -16,7 +16,8 @@ GIT_BRANCH := $(shell git rev-parse --abbrev-ref HEAD 2>/dev/null)
 LIBCOMPOSE_IMAGE := libcompose-dev$(if $(GIT_BRANCH),:$(GIT_BRANCH))
 
 DAEMON_VERSION := $(if $(DAEMON_VERSION),$(DAEMON_VERSION),"default")
-DOCKER_RUN_LIBCOMPOSE := docker run --rm -it --privileged -e DAEMON_VERSION="$(DAEMON_VERSION)" $(LIBCOMPOSE_ENVS) $(LIBCOMPOSE_MOUNT) "$(LIBCOMPOSE_IMAGE)"
+TTY := $(shell [ -t 0 ] && echo "-t")
+DOCKER_RUN_LIBCOMPOSE := docker run --rm -i $(TTY) --privileged -e DAEMON_VERSION="$(DAEMON_VERSION)" $(LIBCOMPOSE_ENVS) $(LIBCOMPOSE_MOUNT) "$(LIBCOMPOSE_IMAGE)"
 
 default: binary