use golangci-lint v1.20

.travis.yml

@@ -8,7 +8,7 @@ git:
   depth: 1
 install: true
 before_script:
-- curl -sfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh| sh -s -- -b ${GOPATH}/bin v1.17.1
+- curl -sfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b ${GOPATH}/bin v1.20.0
 - go get github.com/mitchellh/gox@v1.0.1
 script:
 - make fmt check build-cross

Makefile

@@ -32,10 +32,11 @@ BINARIES  := k3d
 
 # Go Package required
 PKG_GOX := github.com/mitchellh/gox@v1.0.1
-PKG_GOLANGCI_LINT := github.com/golangci/golangci-lint/cmd/golangci-lint@v1.17.1
+PKG_GOLANGCI_LINT_VERSION := v1.20.0
+PKG_GOLANGCI_LINT := github.com/golangci/golangci-lint/cmd/golangci-lint@${PKG_GOLANGCI_LINT_VERSION}
 
 # configuration adjustments for golangci-lint
-GOLANGCI_LINT_DISABLED_LINTERS := typecheck # disabling typecheck, because it currently (06.09.2019) fails with Go 1.13
+GOLANGCI_LINT_DISABLED_LINTERS := "" # disabling typecheck, because it currently (06.09.2019) fails with Go 1.13
 
 # Use Go Modules for everything
 export GO111MODULE=on
@@ -44,7 +45,7 @@ export GO111MODULE=on
 # DIRS defines a single level directly, we only look at *.go in this directory.
 # REC_DIRS defines a source code tree. All go files are analyzed recursively.
 DIRS :=  .
-REC_DIRS := cmd
+REC_DIRS := cli
 
 # Rules for finding all go source files using 'DIRS' and 'REC_DIRS'
 GO_SRC := $(foreach dir,$(DIRS),$(wildcard $(dir)/*.go))
@@ -58,7 +59,7 @@ LINT_DIRS := $(DIRS) $(foreach dir,$(REC_DIRS),$(dir)/...)
 all: clean fmt check build
 
 build:
-	$(GO) build -i $(GOFLAGS) -tags '$(TAGS)' -ldflags '$(LDFLAGS)' -o '$(BINDIR)/$(BINARIES)'
+	CGO_ENABLED=0 $(GO) build -i $(GOFLAGS) -tags '$(TAGS)' -ldflags '$(LDFLAGS)' -o '$(BINDIR)/$(BINARIES)'
 
 build-cross: LDFLAGS += -extldflags "-static"
 build-cross:
@@ -68,8 +69,8 @@ clean:
 	@rm -rf $(BINDIR) _dist/
 
 extra-clean: clean
-	go clean -i $(PKG_GOX)
-	go clean -i $(PKG_GOLANGCI_LINT)
+	$(GO) clean -i $(PKG_GOX)
+	$(GO) clean -i $(PKG_GOLANGCI_LINT)
 
 # fmt will fix the golang source style in place.
 fmt:
@@ -90,8 +91,8 @@ HAS_GOLANGCI  := $(shell command -v golangci-lint 2> /dev/null)
 
 install-tools:
 ifndef HAS_GOX
-	(go get $(PKG_GOX))
+	($(GO) get $(PKG_GOX))
 endif
 ifndef HAS_GOLANGCI
-	(curl -sfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh| sh -s -- -b ${GOPATH}/bin v1.19.1)
+	(curl -sfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh| sh -s -- -b ${GOPATH}/bin ${PKG_GOLANGCI_LINT_VERSION})
 endif