Add make check-licenses rule for the ability to manually check licenses in vendored dependencies

This is a follow-up for c687536956

.github/workflows/check-licenses.yml

@@ -16,11 +16,8 @@ jobs:
         with:
           go-version: 1.16
         id: go
-      - name: Dependencies
-        run: |
-          go get -u github.com/frapposelli/wwhrd
       - name: Code checkout
         uses: actions/checkout@master
       - name: Check License
         run: |
-          wwhrd check
+          make check-licenses

.wwhrd.yml

@@ -1,6 +1,4 @@
-blacklist:
+allowlist:
-  - GPL-2.0
-whitelist:
   - Apache-2.0
   - MIT
   - BSD-3-Clause

Makefile

@@ -190,7 +190,7 @@ lint: install-golint
 	golint app/...
 
 install-golint:
-	which golint || go install golang.org/x/lint/golint
+	which golint || GO111MODULE=off go get golang.org/x/lint/golint
 
 errcheck: install-errcheck
 	errcheck -exclude=errcheck_excludes.txt ./lib/...
@@ -205,7 +205,7 @@ errcheck: install-errcheck
 	errcheck -exclude=errcheck_excludes.txt ./app/vmctl/...
 
 install-errcheck:
-	which errcheck || go install github.com/kisielk/errcheck
+	which errcheck || GO111MODULE=off go get github.com/kisielk/errcheck
 
 check-all: fmt vet lint errcheck golangci-lint
 
@@ -254,7 +254,7 @@ quicktemplate-gen: install-qtc
 	qtc
 
 install-qtc:
-	which qtc || go install github.com/valyala/quicktemplate/qtc
+	which qtc || GO111MODULE=off go get github.com/valyala/quicktemplate/qtc
 
 
 golangci-lint: install-golangci-lint
@@ -263,6 +263,12 @@ golangci-lint: install-golangci-lint
 install-golangci-lint:
 	which golangci-lint || curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(shell go env GOPATH)/bin v1.29.0
 
+install-wwhrd:
+	which wwhrd || GO111MODULE=off go get github.com/frapposelli/wwhrd
+
+check-licenses: install-wwhrd
+	wwhrd check -f .wwhrd.yml
+
 copy-docs:
 	echo "---\nsort: ${ORDER}\n---\n" > ${DST}
 	cat ${SRC} >> ${DST}