# In order to ensure make instructions fail if there is command that fails a pipe (ie: `go test ... | tee -a ./test_results.txt`)
# the value `-o pipefail` (or `set -o pipefail`) is added to each shell command that make runs
# otherwise in the example command pipe, only the exit code of `tee` is recorded instead of `go test` which can cause 
# test to pass in CI when they should not.
SHELL = /bin/bash
ifeq ($(shell uname -s),Windows)
	.SHELLFLAGS = /o pipefile /c
else 
	.SHELLFLAGS = -o pipefail -c
endif

# SRC_ROOT is the top of the source tree.
SRC_ROOT := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))

# build tags required by any component should be defined as an independent variables and later added to GO_BUILD_TAGS below
GO_BUILD_TAGS=""
GOTEST_OPT?= -race -timeout 300s -parallel 4 --tags=$(GO_BUILD_TAGS)
GOTEST_INTEGRATION_OPT?= -race -timeout 360s -parallel 4
GOTEST_OPT_WITH_COVERAGE = $(GOTEST_OPT) -coverprofile=coverage.txt -covermode=atomic
GOTEST_OPT_WITH_INTEGRATION=$(GOTEST_INTEGRATION_OPT) -tags=integration,$(GO_BUILD_TAGS) -run=Integration -coverprofile=integration-coverage.txt -covermode=atomic
GOCMD?= go
GOTEST=$(GOCMD) test
GOOS=$(shell $(GOCMD) env GOOS)
GOARCH=$(shell $(GOCMD) env GOARCH)

# In order to help reduce toil related to managing tooling for the open telemetry collector
# this section of the makefile looks at only requiring command definitions to be defined
# as part of $(TOOLS_MOD_DIR)/tools.go, following the existing practice.
# Modifying the tools' `go.mod` file will trigger a rebuild of the tools to help
# ensure that all contributors are using the most recent version to make builds repeatable everywhere.
TOOLS_MOD_DIR    := $(SRC_ROOT)/internal/tools
TOOLS_MOD_REGEX  := "\s+_\s+\".*\""
TOOLS_PKG_NAMES  := $(shell grep -E $(TOOLS_MOD_REGEX) < $(TOOLS_MOD_DIR)/tools.go | tr -d " _\"")
TOOLS_BIN_DIR    := $(SRC_ROOT)/.tools
TOOLS_BIN_NAMES  := $(addprefix $(TOOLS_BIN_DIR)/, $(notdir $(TOOLS_PKG_NAMES)))

.PHONY: install-tools
install-tools: $(TOOLS_BIN_NAMES)

$(TOOLS_BIN_DIR):
	mkdir -p $@

$(TOOLS_BIN_NAMES): $(TOOLS_BIN_DIR) $(TOOLS_MOD_DIR)/go.mod
	cd $(TOOLS_MOD_DIR) && $(GOCMD) build -o $@ -trimpath $(filter %/$(notdir $@),$(TOOLS_PKG_NAMES))

ADDLICENCESE        := $(TOOLS_BIN_DIR)/addlicense
MDLINKCHECK         := $(TOOLS_BIN_DIR)/markdown-link-check
MISSPELL            := $(TOOLS_BIN_DIR)/misspell -error
MISSPELL_CORRECTION := $(TOOLS_BIN_DIR)/misspell -w
LINT                := $(TOOLS_BIN_DIR)/golangci-lint
MULITMOD            := $(TOOLS_BIN_DIR)/multimod
CHLOGGEN            := $(TOOLS_BIN_DIR)/chloggen
GOIMPORTS           := $(TOOLS_BIN_DIR)/goimports
PORTO               := $(TOOLS_BIN_DIR)/porto
CHECKDOC            := $(TOOLS_BIN_DIR)/checkdoc
CROSSLINK           := $(TOOLS_BIN_DIR)/crosslink
GOJUNIT             := $(TOOLS_BIN_DIR)/go-junit-report 
BUILDER             := $(TOOLS_BIN_DIR)/builder

# BUILD_TYPE should be one of (dev, release).
BUILD_TYPE?=release
RUNNING_ON_GITHUB_ACTION=$(GITHUB_ACTIONS)

ALL_PKG_DIRS := $(shell $(GOCMD) list -f '{{ .Dir }}' ./... | sort)

ALL_SRC := $(shell find $(ALL_PKG_DIRS) -name '*.go' \
                                -not -path '*/third_party/*' \
                                -not -path '*/local/*' \
                                -type f | sort)

# All source code and documents. Used in spell check.
ALL_SRC_AND_DOC := $(shell find $(ALL_PKG_DIRS) -name "*.md" -o -name "*.go" -o -name "*.yaml" \
                                -not -path '*/third_party/*' \
                                -type f | sort)

# ALL_PKGS is used with 'go cover'
ALL_PKGS := $(shell $(GOCMD) list $(sort $(dir $(ALL_SRC))))

pwd:
	@pwd

all-pkgs:
	@echo $(ALL_PKGS) | tr ' ' '\n' | sort

all-srcs:
	@echo $(ALL_SRC) | tr ' ' '\n' | sort

all-pkg-dirs:
	@echo $(ALL_PKG_DIRS) | tr ' ' '\n' | sort

.DEFAULT_GOAL := common

.PHONY: common
common: checklicense lint misspell

.PHONY: test
test:
	if [ "$(RUNNING_ON_GITHUB_ACTION)" = "true" ]; then \
		$(GOTEST) $(GOTEST_OPT) -v ./... 2>&1 | tee -a ./foresight-test-report.txt; \
	else \
		$(GOTEST) $(GOTEST_OPT) ./...; \
	fi
	
.PHONY: do-unit-tests-with-cover
do-unit-tests-with-cover:
	@echo "running $(GOCMD) unit test ./... + coverage in `pwd`"
	@if [ "$(RUNNING_ON_GITHUB_ACTION)" = "true" ]; then \
		$(GOTEST) $(GOTEST_OPT_WITH_COVERAGE) -v ./... 2>&1 | tee -a ./foresight-test-report-unit-tests-with-cover.txt; \
	else \
		$(GOTEST) $(GOTEST_OPT_WITH_COVERAGE) ./...; \
	fi
	$(GOCMD) tool cover -html=coverage.txt -o coverage.html

.PHONY: do-integration-tests-with-cover
do-integration-tests-with-cover:
	@echo "running $(GOCMD) integration test ./... + coverage in `pwd`"
	@if [ "$(RUNNING_ON_GITHUB_ACTION)" = "true" ]; then \
		$(GOTEST) $(GOTEST_OPT_WITH_INTEGRATION) -v ./... 2>&1 | tee -a ./foresight-test-report-integration-tests-with-cover.txt; \
	else \
		$(GOTEST) $(GOTEST_OPT_WITH_INTEGRATION) ./...; \
	fi
	@if [ -e integration-coverage.txt ]; then \
  		$(GOCMD) tool cover -html=integration-coverage.txt -o integration-coverage.html; \
  	fi

.PHONY: benchmark
benchmark:
	$(GOTEST) -bench=. -run=notests --tags=$(GO_BUILD_TAGS) $(ALL_PKGS)

.PHONY: addlicense
addlicense: $(ADDLICENCESE)
	@ADDLICENCESEOUT=`$(ADDLICENCESE) -y "" -c 'The OpenTelemetry Authors' $(ALL_SRC) 2>&1`; \
		if [ "$$ADDLICENCESEOUT" ]; then \
			echo "$(ADDLICENCESE) FAILED => add License errors:\n"; \
			echo "$$ADDLICENCESEOUT\n"; \
			exit 1; \
		else \
			echo "Add License finished successfully"; \
		fi

.PHONY: checklicense
checklicense: $(ADDLICENCESE)
	@ADDLICENCESEOUT=`$(ADDLICENCESE) -check $(ALL_SRC) 2>&1`; \
		if [ "$$ADDLICENCESEOUT" ]; then \
			echo "$(ADDLICENCESE) FAILED => add License errors:\n"; \
			echo "$$ADDLICENCESEOUT\n"; \
			echo "Use 'make addlicense' to fix this."; \
			exit 1; \
		else \
			echo "Check License finished successfully"; \
		fi

.PHONY: checklinks
checklinks:
	command -v $(MDLINKCHECK) >/dev/null 2>&1 || { echo >&2 "$(MDLINKCHECK) not installed. Run 'npm install -g markdown-link-check'"; exit 1; }
	find . -name \*.md -print0 | xargs -0 -n1 \
		$(MDLINKCHECK) -q -c $(SRC_ROOT)/.github/workflows/check_links_config.json || true

.PHONY: fmt
fmt: $(GOIMPORTS)
	gofmt  -w -s ./
	$(GOIMPORTS) -w  -local github.com/open-telemetry/opentelemetry-collector-contrib ./

.PHONY: lint
lint: $(LINT) checklicense misspell
	$(LINT) run --allow-parallel-runners --build-tags integration

.PHONY: tidy
tidy:
	rm -fr go.sum
	$(GOCMD) mod tidy -compat=1.18

.PHONY: misspell
misspell: $(TOOLS_BIN_DIR)/misspell
	@echo "running $(MISSPELL)"
	@$(MISSPELL) $(ALL_SRC_AND_DOC)

.PHONY: misspell-correction
misspell-correction: $(TOOLS_BIN_DIR)/misspell
	$(MISSPELL_CORRECTION) $(ALL_SRC_AND_DOC)

.PHONY: moddownload
moddownload:
	$(GOCMD) mod download

.PHONY: updatedep
updatedep:
	$(PWD)/internal/buildscripts/update-dep
	@$(MAKE) tidy