ci: preserve certain environment variables

We want to increase testing timeouts for GitLab CI, where we use our own
runners and observe stalls and high disk pressure when several vinyl
tests are run in parallel. The idea is to set variables in GitLab CI web
interface and read them from test-run (see [1]).

First, we need to pass the variables into inner environments. GitLab CI
jobs run the testing using packpack, Docker or VirtualBox.

Packpack already preserves environment variables that are listed in the
PRESERVE_ENVVARS variable (see [2]).

This commit passes the variables that are listed in the PRESERVE_ENVVARS
variable into Docker and VirtualBox environment. So, all jobs will have
given variables in the enviroment. (Also dropped unused EXTRA_ENV
variable.)

The next commit will update the test-run submodule with support of
setting timeouts using environment variables.

[1]: https://github.com/tarantool/test-run/issues/258
[2]: https://github.com/packpack/packpack/pull/135

.gitlab.mk

@@ -85,6 +85,16 @@ perf_cleanup: perf_clone_benchs_repo perf_cleanup_image
 # Run tests under a virtual machine
 # #################################
 
+# Transform the ${PRESERVE_ENVVARS} comma separated variables list
+# to the 'key="value" key="value" <...>' string.
+#
+# Add PRESERVE_ENVVARS itself to the list to allow to use this
+# make script again from the inner environment (if there will be
+# a need).
+comma := ,
+ENVVARS := PRESERVE_ENVVARS $(subst $(comma), ,$(PRESERVE_ENVVARS))
+PRESERVE_ENV := $(foreach var,$(ENVVARS),$(var)="$($(var))")
+
 vms_start:
 	VBoxManage controlvm ${VMS_NAME} poweroff || true
 	VBoxManage snapshot ${VMS_NAME} restore ${VMS_NAME}
@@ -93,9 +103,7 @@ vms_start:
 vms_test_%:
 	tar czf - ../tarantool | ssh ${VMS_USER}@127.0.0.1 -p ${VMS_PORT} tar xzf -
 	ssh ${VMS_USER}@127.0.0.1 -p ${VMS_PORT} "/bin/bash -c \
-		'${EXTRA_ENV} \
-		cd tarantool && \
-		${TRAVIS_MAKE} $(subst vms_,,$@)'"
+		'cd tarantool && ${PRESERVE_ENV} ${TRAVIS_MAKE} $(subst vms_,,$@)'"
 
 vms_shutdown:
 	VBoxManage controlvm ${VMS_NAME} poweroff

.travis.mk

@@ -20,6 +20,16 @@ LEIN_URL="https://raw.githubusercontent.com/technomancy/leiningen/stable/bin/lei
 TERRAFORM_NAME="terraform_0.13.1_linux_amd64.zip"
 TERRAFORM_URL="https://releases.hashicorp.com/terraform/0.13.1/"$(TERRAFORM_NAME)
 
+# Transform the ${PRESERVE_ENVVARS} comma separated variables list
+# to the '-e key="value" -e key="value" <...>' string.
+#
+# Add PRESERVE_ENVVARS itself to the list to allow to use this
+# make script again from the inner environment (if there will be
+# a need).
+comma := ,
+ENVVARS := PRESERVE_ENVVARS $(subst $(comma), ,$(PRESERVE_ENVVARS))
+DOCKER_ENV := $(foreach var,$(ENVVARS),-e $(var)="$($(var))")
+
 all: package
 
 package:
@@ -50,6 +60,7 @@ docker_%:
 		-e APT_EXTRA_FLAGS="${APT_EXTRA_FLAGS}" \
 		-e CC=${CC} \
 		-e CXX=${CXX} \
+		${DOCKER_ENV} \
 		${DOCKER_IMAGE} \
 		make -f .travis.mk $(subst docker_,,$@)
 
@@ -232,8 +243,14 @@ test_static_build_cmake_linux:
 # ###################
 
 test_debian_docker_luacheck:
-	docker run -w ${OOS_SRC_PATH} -v ${PWD}:${OOS_SRC_PATH} --privileged \
-		--cap-add=sys_nice --network=host -i ${DOCKER_IMAGE_TARANTOOL} \
+	docker run                       \
+		-w ${OOS_SRC_PATH}           \
+		-v ${PWD}:${OOS_SRC_PATH}    \
+		--privileged                 \
+		--cap-add=sys_nice           \
+		--network=host               \
+		${DOCKER_ENV}                \
+		-i ${DOCKER_IMAGE_TARANTOOL} \
 		make -f .travis.mk test_debian_luacheck
 
 test_debian_install_luacheck:
@@ -264,6 +281,7 @@ test_oos_build:
 	docker run --network=host -w ${OOS_SRC_PATH} \
 		--mount type=bind,source="${PWD}",target=${OOS_SRC_PATH},readonly,bind-propagation=rslave \
 		--tmpfs ${OOS_BUILD_PATH}:exec \
+		${DOCKER_ENV} \
 		-i ${DOCKER_IMAGE_TARANTOOL} \
 		make -f .travis.mk ${OOS_BUILD_RULE}