# Copyright 2024 The Khronos Group Inc.
# SPDX-License-Identifier: Apache-2.0

# Makefile to update external files generated in other repositories when
# a public specification update is done.

# Needed to get the right version of test, apparently
SHELL  = /bin/bash

REVISION = 999

# Location of other repository clones
GIT	 = ..
SPEC	 = $(GIT)/Vulkan-Docs
HPP	 = $(GIT)/Vulkan-Hpp
REGISTRY = $(GIT)/registry/vulkan

update: consistency-check create-branch update-files push-branch

# Working branch for the update, and a test if it exists
BRANCH = update-$(REVISION)

# Switch to new branch which will contain the update
create-branch: consistency-check
	git switch -q main
	git pull -q
	# If branch already exists, do nothing
	@if test `git branch -l $(BRANCH) | wc -l` == 1 ; then \
	    echo "Branch $(BRANCH) already exists" ; \
	    git switch $(BRANCH) ; \
	else \
	    echo "Creating branch $(BRANCH)" ; \
	    git switch -c $(BRANCH) ; \
	fi

# Update headers and scripts in the new branch
update-files: remove-files update-headers update-scripts

# Vulkan SC Vulkan-Hpp headers not published in the Vulkan-Headers repository
SCHPPFILES = \
    include/vulkan/vulkansc.hpp \
    include/vulkan/vulkansc.cppm \
    include/vulkan/vulkansc_*.hpp

update-headers:
	if test ! -d $(SPEC)/gen/include/ ; then \
	    echo "No C header file source directory $(SPEC)/gen/include" ; \
	    exit 1 ; \
	fi
	if test ! -d $(HPP)/vulkan ; then \
	    echo "No C++ header file source directory $(HPP)/vulkan" ; \
	    exit 1 ; \
	fi
	cp -r $(SPEC)/gen/include/* include/
	cp -r $(HPP)/vulkan/* include/vulkan/
	rm -f $(SCHPPFILES)

# Top-level scripts / XML
SCRIPTS = \
    $(SPEC)/scripts/cgenerator.py \
    $(SPEC)/scripts/generator.py \
    $(SPEC)/scripts/parse_dependency.py \
    $(SPEC)/scripts/reg.py \
    $(SPEC)/scripts/stripAPI.py \
    $(SPEC)/scripts/apiconventions.py \
    $(SPEC)/scripts/vkconventions.py \
    $(SPEC)/xml/vk.xml \
    $(SPEC)/xml/video.xml \
    $(REGISTRY)/specs/1.3-extensions/validation/validusage.json

# Scripts in registry/spec_tools
SCRIPT_TOOLS = \
    $(SPEC)/scripts/spec_tools/conventions.py \
    $(SPEC)/scripts/spec_tools/util.py

# Profiles
PROFILES = \
    $(wildcard $(SPEC)/xml/profiles/*)

update-scripts:
	cp $(SCRIPTS) registry/
	cp $(PROFILES) registry/profiles/
	cp $(SCRIPT_TOOLS) registry/spec_tools/

# To ensure updates are caught, old versions of installed files are
# removed.

# Files in include/ to keep
HEADERS_KEEP = \
    include/vulkan/vk_icd.h \
    include/vulkan/vk_layer.h

remove-files:
	rm -rf $(filter-out $(HEADERS_KEEP), $(wildcard include/vulkan/*))
	rm -rf include/vk_video
	rm -rf registry
	mkdir include/vk_video registry registry/profiles registry/spec_tools

# Once the branch is updated, push it to upstream
# This does not actually push it for safety reasons
push-branch:
	@echo Verify that all new files are 'git add'ed and obsolete files removed, then:
	@echo git commit -m \"Update for Vulkan-Docs 1.3.$(REVISION)\"
	@echo git push --set-upstream origin $(BRANCH)
	@echo git switch main

consistency-check:
	@if test $(REVISION) = 999 ; then echo "Must specify explicit REVISION= in make invocation" ; exit 1 ; fi