hack/tools.mk

# SPDX-FileCopyrightText: 2023 SAP SE or an SAP affiliate company and Gardener contributors
#
# SPDX-License-Identifier: Apache-2.0

TOOLS_BIN_DIR              := $(TOOLS_DIR)/bin
MOCKGEN                    := $(TOOLS_BIN_DIR)/mockgen

export TOOLS_BIN_DIR := $(TOOLS_BIN_DIR)
export PATH := $(abspath $(TOOLS_BIN_DIR)):$(PATH)

#########################################
# Common                                #
#########################################

# Tool targets should declare go.mod as a prerequisite, if the tool's version is managed via go modules. This causes
# make to rebuild the tool in the desired version, when go.mod is changed.
# For tools where the version is not managed via go.mod, we use a file per tool and version as an indicator for make
# whether we need to install the tool or a different version of the tool (make doesn't rerun the rule if the rule is
# changed).

# Use this "function" to add the version file as a prerequisite for the tool target: e.g.
#   $(HELM): $(call tool_version_file,$(HELM),$(HELM_VERSION))
tool_version_file = $(TOOLS_BIN_DIR)/.version_$(subst $(TOOLS_BIN_DIR)/,,$(1))_$(2)

# This target cleans up any previous version files for the given tool and creates the given version file.
# This way, we can generically determine, which version was installed without calling each and every binary explicitly.
$(TOOLS_BIN_DIR)/.version_%:
	@version_file=$@; rm -f $${version_file%_*}*
	@touch $@

.PHONY: clean-tools-bin
clean-tools-bin:
	rm -rf $(TOOLS_BIN_DIR)/*

#########################################
# Tools                                 #
#########################################

$(MOCKGEN): go.mod
	go build -o $(MOCKGEN) github.com/golang/mock/mockgen