#!/usr/bin/make -f

#
# \brief  Tool for assembling a source archive
# \author Norman Feske
# \date   2016-05-13
#

define HELP_MESSAGE

  Tool for assembling a source archive

  usage:

    $(firstword $(MAKEFILE_LIST)) <src-name> USER=<user>

    <src-name>   name of the source archive
    <user>       identity of the archive creator

endef

export GENODE_DIR := $(realpath $(dir $(MAKEFILE_LIST))/../../..)

include $(GENODE_DIR)/tool/depot/mk/front_end.inc

#
# The target is the name of the archive
#
ARCHIVE  := $(TARGET)
TAG_FILE := LICENSE

ifeq ($(USER),)
$(error USER undefined)
endif

#
# Define location of recipe and the exported archive
#
RECIPE_DIR    := $(call recipe_dir,src/$(ARCHIVE))
REP_DIR       := $(RECIPE_DIR:/recipes/src/$(ARCHIVE)=)
DEPOT_SUB_DIR := $(DEPOT_DIR)/$(USER)/src

#
# Customize command executed whenever an archive version is automatically
# updated. Whenever the version of a src archive is automatically increased,
# make sure that the depot is void of any binary archives matching the new
# version number.
#
VERSION_UPDATED_CMD = ( cd $(DEPOT_DIR); \
                        for stale in $(USER)/bin/*/$(ARCHIVE)/$(RECIPE_VERSION); do \
                          echo "removing stale binary archive $$stale"; \
                          rm -rf $$stale; \
                        done )

#
# Include common archive-creation steps
#
include $(GENODE_DIR)/tool/depot/mk/extract.inc
include $(GENODE_DIR)/tool/depot/mk/extract_content.inc

#
# Add used_apis information, supplemented with the current API hashes
#
ifneq ($(wildcard $(RECIPE_DIR)/used_apis),)
$(DEPOT_ARCHIVE_DIR).hash: $(DEPOT_ARCHIVE_DIR)/used_apis
endif

$(DEPOT_ARCHIVE_DIR)/used_apis: $(DEPOT_ARCHIVE_DIR)
$(DEPOT_ARCHIVE_DIR)/used_apis: $(RECIPE_DIR)/used_apis
	$(VERBOSE) \
	for api in $(shell cat $<); do \
	  hash_file=$(GENODE_DIR)/repos/**/recipes/api/$$api/hash; \
	  if [ ! -f $$hash_file ]; then \
	    echo "Error: archive $(ARCHIVE) depends on nonexisting API '$$api',"; \
	    echo "       expected $$hash_file"; \
	    rm -r $(DEPOT_ARCHIVE_DIR); \
	    result=false; \
	    break; \
	  fi; \
	  hash_file_content=$$(< $$hash_file); \
	  version=$${hash_file_content%% *}; \
	  echo "$$api/$$version" >> $@; \
	done; $$result

#
# If the archive is a library, add the hash of its implemented API
#
ifneq ($(wildcard $(RECIPE_DIR)/api),)
$(DEPOT_ARCHIVE_DIR).hash: $(DEPOT_ARCHIVE_DIR)/api
endif
$(DEPOT_ARCHIVE_DIR)/api: $(DEPOT_ARCHIVE_DIR)
$(DEPOT_ARCHIVE_DIR)/api: $(RECIPE_DIR)/api
	$(VERBOSE) \
	api=$$(< $<); \
	  hash_file=$(GENODE_DIR)/repos/**/recipes/api/$$api/hash; \
	  if [ ! -f $$hash_file ]; then \
	    echo "Error: library '$(ARCHIVE)' implements unknown API '$$api',"; \
	    echo "       expected $$hash_file"; \
	    rm -r $(DEPOT_ARCHIVE_DIR); \
	    exit -1; \
	  fi; \
	  hash_file_content=$$(< $$hash_file); \
	  version=$${hash_file_content%% *}; \
	  echo "$$api/$$version" >> $@;