ci: enable -race from matrix

Add a new test matrix dimension so all tests are run twice,
with and without race detector.

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>

.github/workflows/test.yml

@@ -21,6 +21,7 @@ jobs:
       matrix:
         go-version: [1.14.x, 1.15.x, 1.16.0-rc1]
         rootless: ["rootless", ""]
+        race: ["-race", ""]
 
     steps:
 
@@ -41,7 +42,7 @@ jobs:
         go-version: ${{ matrix.go-version }}
 
     - name: build
-      run: sudo -E PATH="$PATH" make all
+      run: sudo -E PATH="$PATH" make EXTRA_FLAGS="${{ matrix.race }}" all
 
     - name: install bats
       uses: mig4/setup-bats@v1
@@ -50,7 +51,7 @@ jobs:
 
     - name: unit test
       if: matrix.rootless != 'rootless'
-      run: sudo -E PATH="$PATH" -- make localunittest
+      run: sudo -E PATH="$PATH" -- make TESTFLAGS="${{ matrix.race }}" localunittest
 
     - name: add rootless user
       if: matrix.rootless == 'rootless'

Makefile

@@ -20,7 +20,9 @@ ifneq ($(GO111MODULE),off)
 endif
 ifeq ($(shell $(GO) env GOOS),linux)
 	ifeq (,$(filter $(shell $(GO) env GOARCH),mips mipsle mips64 mips64le ppc64))
-		GO_BUILDMODE := "-buildmode=pie"
+		ifeq (,$(findstring -race,$(EXTRA_FLAGS)))
+			GO_BUILDMODE := "-buildmode=pie"
+		endif
 	endif
 endif
 GO_BUILD := $(GO) build -trimpath $(MOD_VENDOR) $(GO_BUILDMODE) $(EXTRA_FLAGS) -tags "$(BUILDTAGS)" \