go.mk: remove submodule and initialize through make

.github/actions/build/action.yml

@@ -6,7 +6,7 @@ runs:
       with:
         fetch-depth: 0
 
-    - run: git submodule update --init --recursive go.mk
+    - run: make go.mk
       shell: bash
     - uses: ./go.mk/.github/actions/setup
 

.github/workflows/docker-push.yml

@@ -18,7 +18,7 @@ jobs:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
       - uses: actions/checkout@v3
-      - run: git submodule update --init --recursive go.mk
+      - run: make go.mk
       - uses: ./go.mk/.github/actions/setup
       - name: Build Docker image
         run: make docker

.github/workflows/integ-tests.yml

@@ -22,7 +22,7 @@ jobs:
         with:
           fetch-depth: 0
 
-      - run: git submodule update --init --recursive go.mk
+      - run: make go.mk
 
       - uses: ./go.mk/.github/actions/setup
 

.github/workflows/main.yml

@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - run: git submodule update --init --recursive go.mk
+      - run: make go.mk
       - uses: ./go.mk/.github/actions/setup
       - name: Build Docker image
         run: make docker

.gitignore

@@ -16,6 +16,7 @@
 
 # Dependency directories (remove the comment below to include it)
 # vendor/
+/go.mk
 
 # Go workspace file
 go.work

Makefile

@@ -7,12 +7,42 @@ EXTRA_ARGS := -parallel 3 -count=1 -failfast
 # Dependencies
 
 # Requires: https://github.com/exoscale/go.mk
-# - install: git submodule update --init --recursive go.mk
-# - update:  git submodule update --remote
+GO_MK_REF := v1.0.0
+
+# make go.mk a dependency for all targets
+.EXTRA_PREREQS = go.mk
+
+ifndef MAKE_RESTARTS
+# This section will be processed the first time that make reads this file.
+
+# This causes make to re-read the Makefile and all included
+# makefiles after go.mk has been cloned.
+Makefile:
+	@touch Makefile
+endif
+
+.PHONY: go.mk
+.ONESHELL:
+go.mk:
+	@if [ ! -d "go.mk" ]; then
+		git clone https://github.com/exoscale/go.mk.git
+	fi
+	@cd go.mk
+	@if ! git show-ref --quiet --verify "refs/heads/${GO_MK_REF}"; then
+		git fetch
+	fi
+	@if ! git show-ref --quiet --verify "refs/tags/${GO_MK_REF}"; then
+		git fetch --tags
+	fi
+	git checkout --quiet ${GO_MK_REF}
+
+go.mk/init.mk:
 include go.mk/init.mk
+go.mk/public.mk:
 include go.mk/public.mk
 
 ## Targets
 
 # Docker
+go.mk/init.mk:
 include Makefile.docker

Makefile.docker

@@ -1,3 +1,4 @@
+go.mk/version.mk:
 include go.mk/version.mk
 
 .PHONY: docker