# sfdupes is pure Go; disable cgo so builds never touch the host C
# toolchain.
export CGO_ENABLED = 0

BINARY := sfdupes
VERSION := $(shell git describe --tags --always --dirty 2>/dev/null || echo dev)
LDFLAGS := -X main.Version=$(VERSION)

.PHONY: all build test lint fmt fmt-check check docker hooks clean

all: check build

build:
	go build -ldflags "$(LDFLAGS)" -o $(BINARY)

test:
	@go test -timeout 30s -cover ./... || \
		{ echo "--- Rerunning with -v for details ---"; \
		  go test -timeout 30s -v ./...; exit 1; }

lint:
	golangci-lint run --config .golangci.yml ./...

fmt:
	gofmt -s -w .

fmt-check:
	@files="$$(gofmt -l -s .)"; if [ -n "$$files" ]; then \
		echo "gofmt: files not formatted:"; echo "$$files"; exit 1; fi

check: test lint fmt-check

docker:
	docker build -t $(BINARY) .

# Hooks are shared between the main checkout and all worktrees, so
# resolve the common git dir instead of assuming .git is a directory.
HOOKS_DIR := $(shell git rev-parse --git-common-dir)/hooks

hooks:
	@printf '#!/bin/sh\nset -e\n' > $(HOOKS_DIR)/pre-commit
	@printf 'go mod tidy\ngo fmt ./...\n' >> $(HOOKS_DIR)/pre-commit
	@printf 'git diff --exit-code -- go.mod go.sum || { echo "go mod tidy changed files; please stage and retry"; exit 1; }\n' >> $(HOOKS_DIR)/pre-commit
	@printf 'make check\n' >> $(HOOKS_DIR)/pre-commit
	@chmod +x $(HOOKS_DIR)/pre-commit

clean:
	rm -f $(BINARY) files.dat