Use golangci-lint instead of golint

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

.cirrus.yml

@@ -53,6 +53,7 @@ validate_task:
         cpu: 4
         memory: 8
     script: |
+        curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.52.2
         make validate-local
         make vendor && hack/tree_status.sh
 
@@ -91,7 +92,7 @@ osx_task:
         export PATH=$GOPATH/bin:$PATH
         brew update
         brew install gpgme go go-md2man
-        go install golang.org/x/lint/golint@latest
+        curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.52.2
     test_script: |
         export PATH=$GOPATH/bin:$PATH
         go version

Makefile

@@ -227,7 +227,7 @@ test-all-local: validate-local validate-docs test-unit-local
 validate-local:
 	hack/validate-git-marks.sh
 	hack/validate-gofmt.sh
-	hack/validate-lint.sh
+	GOBIN=$(GOBIN) hack/validate-lint.sh
 	BUILDTAGS="${BUILDTAGS}" hack/validate-vet.sh
 
 # This invokes bin/skopeo, hence cannot be run as part of validate-local

hack/validate-lint.sh

@@ -1,27 +1,15 @@
 #!/bin/bash
 
-IFS=$'\n'
-files=( $(find . -name '*.go' | grep -v '^\./vendor/' | sort || true) )
-unset IFS
+errors=$($GOBIN/golangci-lint run --build-tags "${BUILDTAGS}" 2>&1)
 
-errors=()
-for f in "${files[@]}"; do
-	failedLint=$(golint "$f")
-	if [ "$failedLint" ]; then
-		errors+=( "$failedLint" )
-	fi
-done
-
-if [ ${#errors[@]} -eq 0 ]; then
+if [ -z "$errors" ]; then
 	echo 'Congratulations!  All Go source files have been linted.'
 else
 	{
-		echo "Errors from golint:"
-		for err in "${errors[@]}"; do
-			echo "$err"
-		done
+		echo "Errors from golangci-lint:"
+		echo "$errors"
 		echo
-		echo 'Please fix the above errors. You can test via "golint" and commit the result.'
+		echo 'Please fix the above errors. You can test via "golangci-lint" and commit the result.'
 		echo
 	} >&2
 	exit 1