Make improvements

- removed reduntant integration Makefile
- changed "integration" target to run only integration tests
  this should speed up CI tests because they wont run unit tests twice
  (in `testrace` and again in `int` target)
- added help target to list available targets to be used by user
- added target to download and build redis server
  server will be downloaded and build if it's not available
  when version in get_redis.sh will be changed new server will be
  downloaded and build automatically even if previous version was
  available locally

Signed-off-by: Wojciech Szarański <wojciech.szaranski@gmail.com>

Author: wszaranski

.github/workflows/ci.yaml

@@ -16,7 +16,5 @@ jobs:
     - uses: actions/setup-go@v4
       with:
         go-version: ${{ matrix.go }}
-    - name: Install Redis
-      run: (cd ./integration && ./get_redis.sh)
     - name: Test
       run: make int testrace

Makefile

@@ -1,12 +1,32 @@
-.PHONY: all test testrace int
+.PHONY: help
+help:	### This screen. Keep it first target to be default
+ifeq ($(UNAME), Linux)
+	@grep -P '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort | \
+		awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-20s\033[0m %s\n", $$1, $$2}'
+else
+	@# this is not tested, but prepared in advance for you, Mac drivers
+	@awk -F ':.*###' '$$0 ~ FS {printf "%15s%s\n", $$1 ":", $$2}' \
+		$(MAKEFILE_LIST) | grep -v '@awk' | sort
+endif
 
-all: test
-
-test:
+.PHONY: test
+test: ### Run unit tests
 	go test ./...
 
-testrace:
+.PHONY: testrace
+testrace: ### Run unit tests with race detector
 	go test -race ./...
 
-int:
-	INT=1 go test ./...
+.PHONY: int
+int: integration/redis_src/redis-server ### Run integration tests
+	INT=1 go test ./integration/...
+
+integration/redis_src/redis-server: integration/get_redis.sh ### Download and build redis if not available or in wrong version
+	./integration/get_redis.sh
+
+.PHONY: clean
+clean: ### Cleanup integration test files (including built redis binary)
+	rm -rf \
+		integration/redis_src \
+		integration/dump.rdb \
+		integration/nodes.conf

integration/Makefile

@@ -4,6 +4,7 @@ set -eu
 
 VERSION=7.2.0
 
+cd "$(dirname "$0")"
 rm -rf ./redis_src/
 mkdir -p ./redis_src/
 cd ./redis_src/