BIN ?= bin
GOPLS_VERSION ?= v0.15.1
GOPLS_DIR ?= $(abspath $(BIN))/gopls
GOPLS_VERSION_DIR ?= $(GOPLS_DIR)/$(GOPLS_VERSION)
GOPLS_TEMP_FILE := $(shell mktemp)

.PHONY: gopls-install gopls-run

# Install gopls
gopls-install:
	@rm -rf $(GOPLS_DIR)
	@mkdir $(GOPLS_DIR)
	@GOBIN=$(GOPLS_VERSION_DIR) go install golang.org/x/tools/gopls@$(GOPLS_VERSION)

$(GOPLS_VERSION_DIR): gopls-install

# Run gopls
gopls-run: $(GOPLS_VERSION_DIR)
	$(GOPLS_VERSION_DIR)/gopls check $(SOURCES) 2>&1 >$(GOPLS_TEMP_FILE)
	@if [[ $$(wc -l < $(GOPLS_TEMP_FILE)) -ne 0 ]]; then \
		cat $(GOPLS_TEMP_FILE); \
		exit 1; \
	fi
	rm $(GOPLS_TEMP_FILE)