Add ways to test other channels

Signed-off-by: Eli Uriegas <eli.uriegas@docker.com>

.gitignore

@@ -1 +1,2 @@
 *.log
+build/

Makefile

@@ -1,29 +1,34 @@
 SHELL:=/bin/bash
 VERIFY_INSTALL_DISTROS:=$(addprefix verify-install-,centos-7 fedora-24 fedora-25 debian-wheezy debian-jessie debian-stretch ubuntu-trusty ubuntu-xenial ubuntu-yakkety ubuntu-zesty)
+CHANNEL_TO_TEST:=test
 EXPECTED_VERSION?=
 EXPECTED_GITCOMMIT?=
 
+.PHONY: needs_version
 needs_version:
 ifndef EXPECTED_VERSION
 	$(error EXPECTED_VERSION is undefined)
 endif
 
+.PHONY: needs_gitcommit
 needs_gitcommit:
 ifndef EXPECTED_GITCOMMIT
 	$(error EXPECTED_GITCOMMIT is undefined)
 endif
 
+.PHONY: check
 check: $(VERIFY_INSTALL_DISTROS)
 
+.PHONY: clean
 clean:
 	$(RM) *.log
 
 verify-install-%.log: needs_version needs_gitcommit
+	mkdir -p build
+	sed 's/DEFAULT_CHANNEL_VALUE="test"/DEFAULT_CHANNEL_VALUE="$(CHANNEL_TO_TEST)"/' install.sh > build/install.sh
 	set -o pipefail && docker run \
 		--rm \
 		-v $(CURDIR):/v \
 		-w /v \
 		$(subst -,:,$*) \
 		bash verify-docker-install "$(EXPECTED_VERSION)" "$(EXPECTED_GITCOMMIT)" | tee $@
-
-# TODO: Add a target for uploading final script to s3

verify-docker-install

@@ -3,7 +3,7 @@ expected_version=$1
 expected_gitcommit=$2
 (
 	echo "Executing installation script!"
-	sh install.sh
+	sh build/install.sh
 )
 docker_version=$(docker --version)
 if [ $? -ne 0 ]; then