#!/usr/bin/env bash

#  Copyright 2020 The Kubernetes Authors.
#
#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
#  limitations under the License.

# If you update this file, please follow
# https://suva.sh/posts/well-documented-makefiles

## --------------------------------------
## General
## --------------------------------------

SHELL:=/usr/bin/env bash
.DEFAULT_GOAL:=help

#
# Go.
#
GO_VERSION ?= 1.22.5

# Use GOPROXY environment variable if set
GOPROXY := $(shell go env GOPROXY)
ifeq ($(GOPROXY),)
GOPROXY := https://proxy.golang.org
endif
export GOPROXY

# Active module mode, as we use go modules to manage dependencies
export GO111MODULE=on

# Hosts running SELinux need :z added to volume mounts
SELINUX_ENABLED := $(shell cat /sys/fs/selinux/enforce 2> /dev/null || echo 0)

ifeq ($(SELINUX_ENABLED),1)
  DOCKER_VOL_OPTS?=:z
endif

# Tools.
TOOLS_DIR := hack/tools
TOOLS_BIN_DIR := $(abspath $(TOOLS_DIR)/bin)
GOLANGCI_LINT := $(abspath $(TOOLS_BIN_DIR)/golangci-lint)
GO_APIDIFF := $(TOOLS_BIN_DIR)/go-apidiff
CONTROLLER_GEN := $(TOOLS_BIN_DIR)/controller-gen
ENVTEST_DIR := $(abspath tools/setup-envtest)
SCRATCH_ENV_DIR := $(abspath examples/scratch-env)
GO_INSTALL := ./hack/go-install.sh

# The help will print out all targets with their descriptions organized bellow their categories. The categories are represented by `##@` and the target descriptions by `##`.
# The awk commands is responsible to read the entire set of makefiles included in this invocation, looking for lines of the file as xyz: ## something, and then pretty-format the target and help. Then, if there's a line with ##@ something, that gets pretty-printed as a category.
# More info over the usage of ANSI control characters for terminal formatting: https://en.wikipedia.org/wiki/ANSI_escape_code#SGR_parameters
# More info over awk command: http://linuxcommand.org/lc3_adv_awk.php
.PHONY: help
help:  ## Display this help
	@awk 'BEGIN {FS = ":.*##"; printf "\nUsage:\n  make \033[36m<target>\033[0m\n"} /^[a-zA-Z_0-9-]+:.*?##/ { printf "  \033[36m%-15s\033[0m %s\n", $$1, $$2 } /^##@/ { printf "\n\033[1m%s\033[0m\n", substr($$0, 5) } ' $(MAKEFILE_LIST)

## --------------------------------------
## Testing
## --------------------------------------

.PHONY: test
test: test-tools ## Run the script check-everything.sh which will check all.
	TRACE=1 ./hack/check-everything.sh

.PHONY: test-tools
test-tools: ## tests the tools codebase (setup-envtest)
	cd tools/setup-envtest && go test ./...

## --------------------------------------
## Binaries
## --------------------------------------

GO_APIDIFF_VER := v0.8.2
GO_APIDIFF_BIN := go-apidiff
GO_APIDIFF := $(abspath $(TOOLS_BIN_DIR)/$(GO_APIDIFF_BIN)-$(GO_APIDIFF_VER))
GO_APIDIFF_PKG := github.com/joelanford/go-apidiff

$(GO_APIDIFF): # Build go-apidiff from tools folder.
	GOBIN=$(TOOLS_BIN_DIR) $(GO_INSTALL) $(GO_APIDIFF_PKG) $(GO_APIDIFF_BIN) $(GO_APIDIFF_VER)

CONTROLLER_GEN_VER := v0.14.0
CONTROLLER_GEN_BIN := controller-gen
CONTROLLER_GEN := $(abspath $(TOOLS_BIN_DIR)/$(CONTROLLER_GEN_BIN)-$(CONTROLLER_GEN_VER))
CONTROLLER_GEN_PKG := sigs.k8s.io/controller-tools/cmd/controller-gen

$(CONTROLLER_GEN): # Build controller-gen from tools folder.
	GOBIN=$(TOOLS_BIN_DIR) $(GO_INSTALL) $(CONTROLLER_GEN_PKG) $(CONTROLLER_GEN_BIN) $(CONTROLLER_GEN_VER)

GOLANGCI_LINT_BIN := golangci-lint
GOLANGCI_LINT_VER := $(shell cat .github/workflows/golangci-lint.yml | grep [[:space:]]version: | sed 's/.*version: //')
GOLANGCI_LINT := $(abspath $(TOOLS_BIN_DIR)/$(GOLANGCI_LINT_BIN)-$(GOLANGCI_LINT_VER))
GOLANGCI_LINT_PKG := github.com/golangci/golangci-lint/cmd/golangci-lint

$(GOLANGCI_LINT): # Build golangci-lint from tools folder.
	GOBIN=$(TOOLS_BIN_DIR) $(GO_INSTALL) $(GOLANGCI_LINT_PKG) $(GOLANGCI_LINT_BIN) $(GOLANGCI_LINT_VER)

GO_MOD_CHECK_DIR := $(abspath ./hack/tools/cmd/gomodcheck)
GO_MOD_CHECK := $(abspath $(TOOLS_BIN_DIR)/gomodcheck)
GO_MOD_CHECK_IGNORE := $(abspath .gomodcheck.yaml)
.PHONY: $(GO_MOD_CHECK)
$(GO_MOD_CHECK): # Build gomodcheck
	go build -C $(GO_MOD_CHECK_DIR) -o $(GO_MOD_CHECK)

## --------------------------------------
## Linting
## --------------------------------------

.PHONY: lint
lint: $(GOLANGCI_LINT) ## Lint codebase
	$(GOLANGCI_LINT) run -v $(GOLANGCI_LINT_EXTRA_ARGS)
	cd tools/setup-envtest; $(GOLANGCI_LINT) run -v $(GOLANGCI_LINT_EXTRA_ARGS)

.PHONY: lint-fix
lint-fix: $(GOLANGCI_LINT) ## Lint the codebase and run auto-fixers if supported by the linter.
	GOLANGCI_LINT_EXTRA_ARGS=--fix $(MAKE) lint

## --------------------------------------
## Generate
## --------------------------------------

.PHONY: modules
modules: ## Runs go mod to ensure modules are up to date.
	go mod tidy
	cd $(TOOLS_DIR); go mod tidy
	cd $(ENVTEST_DIR); go mod tidy
	cd $(SCRATCH_ENV_DIR); go mod tidy

## --------------------------------------
## Release
## --------------------------------------

RELEASE_DIR := tools/setup-envtest/out

.PHONY: $(RELEASE_DIR)
$(RELEASE_DIR):
	mkdir -p $(RELEASE_DIR)/

.PHONY: release
release: clean-release $(RELEASE_DIR) ## Build release.
	@if ! [ -z "$$(git status --porcelain)" ]; then echo "Your local git repository contains uncommitted changes, use git clean before proceeding."; exit 1; fi

	# Build binaries first.
	$(MAKE) release-binaries

.PHONY: release-binaries
release-binaries: ## Build release binaries.
	RELEASE_BINARY=setup-envtest-linux-amd64       GOOS=linux   GOARCH=amd64   $(MAKE) release-binary
	RELEASE_BINARY=setup-envtest-linux-arm64       GOOS=linux   GOARCH=arm64   $(MAKE) release-binary
	RELEASE_BINARY=setup-envtest-linux-ppc64le     GOOS=linux   GOARCH=ppc64le $(MAKE) release-binary
	RELEASE_BINARY=setup-envtest-linux-s390x       GOOS=linux   GOARCH=s390x   $(MAKE) release-binary
	RELEASE_BINARY=setup-envtest-darwin-amd64      GOOS=darwin  GOARCH=amd64   $(MAKE) release-binary
	RELEASE_BINARY=setup-envtest-darwin-arm64      GOOS=darwin  GOARCH=arm64   $(MAKE) release-binary
	RELEASE_BINARY=setup-envtest-windows-amd64.exe GOOS=windows GOARCH=amd64   $(MAKE) release-binary

.PHONY: release-binary
release-binary: $(RELEASE_DIR)
	docker run \
		--rm \
		-e CGO_ENABLED=0 \
		-e GOOS=$(GOOS) \
		-e GOARCH=$(GOARCH) \
		-e GOCACHE=/tmp/ \
		--user $$(id -u):$$(id -g) \
		-v "$$(pwd):/workspace$(DOCKER_VOL_OPTS)" \
		-w /workspace/tools/setup-envtest \
		golang:$(GO_VERSION) \
		go build -a -trimpath -ldflags "-extldflags '-static'" \
		-o ./out/$(RELEASE_BINARY) ./

## --------------------------------------
## Cleanup / Verification
## --------------------------------------

.PHONY: clean
clean: ## Cleanup.
	$(GOLANGCI_LINT) cache clean
	$(MAKE) clean-bin

.PHONY: clean-bin
clean-bin: ## Remove all generated binaries.
	rm -rf hack/tools/bin

.PHONY: clean-release
clean-release: ## Remove the release folder
	rm -rf $(RELEASE_DIR)

.PHONY: verify-modules
verify-modules: modules $(GO_MOD_CHECK) ## Verify go modules are up to date
	@if !(git diff --quiet HEAD -- go.sum go.mod $(TOOLS_DIR)/go.mod $(TOOLS_DIR)/go.sum $(ENVTEST_DIR)/go.mod $(ENVTEST_DIR)/go.sum $(SCRATCH_ENV_DIR)/go.sum); then \
		git diff; \
		echo "go module files are out of date, please run 'make modules'"; exit 1; \
	fi
	$(GO_MOD_CHECK) $(GO_MOD_CHECK_IGNORE)

APIDIFF_OLD_COMMIT ?= $(shell git rev-parse origin/main)

.PHONY: apidiff
verify-apidiff: $(GO_APIDIFF) ## Check for API differences
	$(GO_APIDIFF) $(APIDIFF_OLD_COMMIT) --print-compatible

## --------------------------------------
## Helpers
## --------------------------------------

##@ helpers:

go-version: ## Print the go version we use to compile our binaries and images
	@echo $(GO_VERSION)