Makefile.release

GO_MODULE_NAME ?= github.com/instana/go-sensor

VERSION_TAG_PREFIX ?= v
VERSION_GO_FILE ?= $(shell grep -l '^const Version = ".\+"' *.go | head -1)

GIT_REMOTE ?= origin
GIT_MAIN_BRANCH ?= $(shell git remote show $(GIT_REMOTE) | sed -n '/HEAD branch/s/.*: //p')
GIT_TREE_STATE = $(shell (git status --porcelain | grep -q .) && echo dirty || echo clean)

GITHUB_CLI = $(shell which gh 2>/dev/null)

# Search for the latest vX.Y.Z tag ignoring all others, and use the X.Y.Z part as a version
GIT_VERSION = $(shell git tag | grep "^$(VERSION_TAG_PREFIX)[0-9]\+\(\.[0-9]\+\)\{2\}" | sort -V | tail -n1 | sed "s~^$(VERSION_TAG_PREFIX)~~" )
ifeq ($(GIT_VERSION),)
	GIT_VERSION = 0.0.0
endif

# Parse semantic version X.Y.Z found in git tags
GIT_MAJOR_VERSION = $(word 1,$(subst ., ,$(GIT_VERSION)))
GIT_MINOR_VERSION = $(word 2,$(subst ., ,$(GIT_VERSION)))
GIT_PATCH_VERSION = $(word 3,$(subst ., ,$(GIT_VERSION)))

# Parse version from version.go file
VERSION = $(shell grep -hm1 '^const Version = ".\+"' ${VERSION_GO_FILE} | head -1 | sed -E 's/const Version = "([0-9\.]+)"/\1/')

# Create new release tag and publish a release from it
release :
	git tag $(VERSION_TAG_PREFIX)$(VERSION)
	git push --tags
ifneq ($(GITHUB_CLI),)
	$(GITHUB_CLI) release create $(VERSION_TAG_PREFIX)$(VERSION) \
		--draft \
		--title $(VERSION_TAG_PREFIX)$(VERSION)
else
	@echo "GitHub CLI is not installed. Please proceed with creating the release on https://github.com"
endif

# Calculate the next major version from the latest one found in git tags, update version.go, commit and push changes to remote
major : ensure-git-clean update-local-copy
	$(eval VERSION = $(shell echo $$(($(GIT_MAJOR_VERSION)+1))).0.0)
	@printf "You are about to increase the major version to $(VERSION), are you sure? [y/N]: " && read ans && [ $${ans:-N} = y ]
	sed -i '' 's/^const Version = ".*"/const Version = "$(VERSION)"/' ${VERSION_GO_FILE}
	git commit -m "Bump version to v$(VERSION)" ${VERSION_GO_FILE}
	git push $(GIT_REMOTE) HEAD

# Calculate the next minor version from the latest one found in git tags, update version.go, commit and push changes to remote
minor : ensure-git-clean update-local-copy
	$(eval VERSION = $(GIT_MAJOR_VERSION).$(shell echo $$(($(GIT_MINOR_VERSION)+1))).0)
	sed -i '' 's/^const Version = ".*"/const Version = "$(VERSION)"/' ${VERSION_GO_FILE}
	git commit -m "Bump version to v$(VERSION)" ${VERSION_GO_FILE}
	git push $(GIT_REMOTE) HEAD

# Calculate the next patch version from the latest one found in git tags, update version.go, commit and push changes to remote
patch : ensure-git-clean update-local-copy
	$(eval VERSION = $(GIT_MAJOR_VERSION).$(GIT_MINOR_VERSION).$(shell echo $$(($(GIT_PATCH_VERSION)+1))))
	sed -i '' 's/^const Version = ".*"/const Version = "$(VERSION)"/' ${VERSION_GO_FILE}
	git commit -m "Bump version to v$(VERSION)" ${VERSION_GO_FILE}
	git push $(GIT_REMOTE) HEAD

# Make sure there are no uncommitted changes in the working tree
ensure-git-clean :
ifeq ($(GIT_TREE_STATE),dirty)
	$(error "There are uncommitted changes in current working tree. Please stash or commit them before release.")
endif

# Switch to the main branch, then pull and rebase to the latest changes including tags
update-local-copy :
	git fetch --tags $(GIT_REMOTE)
	git checkout $(GIT_MAIN_BRANCH)
	git rebase $(GIT_REMOTE)/$(GIT_MAIN_BRANCH)

.PHONY : major minor patch release ensure-git-clean update-local-copy