Modify tests to only run if non-static files have been modified

.semaphoreci/cleanup.sh

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+set -e
+
+sudo rm -rf static

.semaphoreci/job1.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+set -e
+
+if [ -n "$SHOULD_TEST" ]; then ci_retry make pull-images; fi
+
+if [ -n "$SHOULD_TEST" ]; then ci_retry make test-integration; fi

.semaphoreci/job2.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+set -e
+
+ci_retry make validate
+
+if [ -n "$SHOULD_TEST" ]; then ci_retry make test-unit; fi
+
+if [ -n "$SHOULD_TEST" ]; then make -j${N_MAKE_JOBS} crossbinary-default-parallel; fi

.semaphoreci/setup.sh

@@ -1,11 +1,16 @@
 #!/usr/bin/env bash
 set -e
 
-sudo -E apt-get -yq update
-sudo -E apt-get -yq --no-install-suggests --no-install-recommends --force-yes install docker-ce=${DOCKER_VERSION}*
-docker version
+export DOCKER_VERSION=17.03.1
 
-pip install --user -r requirements.txt
+source .semaphoreci/vars
 
-make pull-images
-ci_retry make validate
+if [ -z "${PULL_REQUEST_NUMBER}" ]; then SHOULD_TEST="-*-"; else TEMP_STORAGE=$(curl --silent https://patch-diff.githubusercontent.com/raw/containous/traefik/pull/${PULL_REQUEST_NUMBER}.diff | patch --dry-run -p1 -R); fi
+
+if [ -n "$TEMP_STORAGE" ]; then SHOULD_TEST=$(echo $TEMP_STORAGE | grep -Ev '(.md|.yaml|.yml)' || :); fi
+
+if [ -n "$SHOULD_TEST" ]; then sudo -E apt-get -yq update; fi
+
+if [ -n "$SHOULD_TEST" ]; then sudo -E apt-get -yq --no-install-suggests --no-install-recommends --force-yes install docker-ce=${DOCKER_VERSION}*; fi
+
+if [ -n "$SHOULD_TEST" ]; then   docker version; fi

.semaphoreci/tests.sh

@@ -1,6 +0,0 @@
-#!/usr/bin/env bash
-set -e
-
-make test-unit
-ci_retry make test-integration
-make -j${N_MAKE_JOBS} crossbinary-default-parallel