Makefile.xdsl

THIS := $(dir $(realpath $(lastword $(MAKEFILE_LIST))))

.PHONY: maybe_update_xdsl_commit force_xdsl_commit

XDSL_DIR         = $(THIS)/xdsl
XDSL_COMMIT_FILE = $(THIS)/xdsl_commit.txt

# Get the current commit hash of xdsl
CURRENT_XDSL_COMMIT := $(shell git -C $(XDSL_DIR) rev-parse HEAD)

# Read the last recorded commit hash from a file, if it exists
LAST_XDSL_COMMIT := $(shell cat $(XDSL_COMMIT_FILE) 2>/dev/null)

# Rule to update the recorded commit hash in a file
maybe_update_xdsl_commit:
	@if [ "$(CURRENT_XDSL_COMMIT)" != "$(LAST_XDSL_COMMIT)" ]; then \
		echo $(CURRENT_XDSL_COMMIT) > $(XDSL_COMMIT_FILE); \
	fi

# Phony target to force re-reading xdsl commit
force_xdsl_commit:
	$(RM) $(SUBMODULE_COMMIT_FILE)