#
# Main Makefile
# ~~~~~~~~~~~~~
# This is a main makefile, used to create, sync and update design projects
#

SHELL				=bash
PYTHON_EXEC			:=python3.8
GIT_EXEC 			:=git
OPTIONS 			=
PORT 				:=8001
GITHUB_COM			?=github
OPENPHY_OWNER		?=ganeshgore
GIT_OPTIONS  		?=


.ONESHELL:
.SILENT:

define copy_files
	# Script Files
	ln -$(1) ../src/generate_top_qlap3.py .
	ln -$(1) ../src/PostOpenFPGAScript.sh .
	ln -$(1) ../src/Makefile .
	ln -$(1) ../src/RestructureNetlist_QLAP3.py .
	ln -$(1) ../src/generate_scandef_and_case_analysis.sh .

	# Design Planning
	echo "Linking PnR Scripts in project folder"
	mkdir -p dp/fpga_top
	mkdir -p pnr
	ln -$(1) ../../../src/dp/fpga_top/custom_scripts dp/fpga_top/
	ln -$(1) ../../../src/dp/fpga_top/extra_scripts dp/fpga_top/
	ln -$(1) ../../../src/dp/fpga_top/rm_setup dp/fpga_top/
	ln -$(1) ../../../src/dp/fpga_top/rm_icc2_dp_scripts dp/fpga_top/
	ln -$(1) ../../../src/dp/fpga_top/Makefile dp/fpga_top/

	# Place and route
	ln -$(1) ../../src/pnr/custom_pnr_scripts pnr/
	ln -$(1) ../../src/pnr/PrimeTimeScripts pnr/
	ln -$(1) ../../src/pnr/rm_icc2_pnr_scripts pnr/
	ln -$(1) ../../src/pnr/rm_setup_common pnr/
	echo "PnR Scripts linked in project folder"
endef

# Put it first so that "make" without argument is like "make help".
export COMMENT_EXTRACT
help:
# Prints help message for this makefile
	@${PYTHON_EXEC} -c "$$COMMENT_EXTRACT"

docs:
# Hosts the docs branch of hit repository over python http server
#
# Most of the physical design projects are closed source and hosted on
# the private repository, making hosting documentation on ``readthedocs``
# or ``Github pages`` challenging. In this framework, as soon as the
# documentation is updated in the repository, it is compiled using a configured
# runner, and output HTML is stored in a separate branch named ``docs``.
#
# ``make docs`` command allows you to pull the docs branch and host HTMlL pages
# using a local python webserver.
#
	${GIT_EXEC} fetch origin docs
	${GIT_EXEC} checkout origin/docs -- docs/_build/html
	git rm -r --cached docs/_build/html
	echo "Hosting server on $$PORT port"
	${PYTHON_EXEC} -m http.server ${PORT} --directory docs/_build/html &

create_project: FORCE
# This command creates design project
#
# This command requires mandatory argument ``PROJ_NAME`` which should be in
# ``FPGA<XX>x<YY>_<name>`` format where ``XX`` and ``YY`` is FPGA grid
# dimensions and ``name`` is any unique project name for the design
#
	[ -z "$$PROJ_NAME" ] && echo "PROJ_NAME variable not provided" && exit
	[ -d "$${PROJ_NAME}_pnr" ] && echo "Project $$PROJ_NAME already exists" && exit
	[[ $$PROJ_NAME != FPGA[0-9]*x[0-9]*_* ]] && echo  "Project name format is wrong $$PROJ_NAME " && exit
	echo -n "Do you want to create project directory $${PROJ_NAME}_pnr (y/n)? "
	read answer
	if [ "$$answer" != "$${answer#[Yy]}" ] ;then
		echo "Creating project directory"
		mkdir -p $${PROJ_NAME}_pnr && cd $${PROJ_NAME}_pnr
		# Move and rename example
		cp -r ../src/Example_OpenFPGA_task .
		mv Example_OpenFPGA_task $${PROJ_NAME}_task
		cp ../src/config.sh .
		sed -i "s/PROJ_NAME=.*\#/PROJ_NAME=$${PROJ_NAME} \#/g" config.sh
		$(call copy_files,s)
	else
		echo "Skipping project initialization"
	fi

FORCE: ;

pull_openfpga_physical:
# This target pushes the local changes to openfpga-physical main repository
#
# ``BRANCH`` To specify pull from specific branch
#
# This target pushes the local changes to openfpga-physical main repository
#
# ``BRANCH`` To specify pull from specific branch
#
	BRANCH=$${BRANCH:='main'}
	git config alias.merge merge --no-commit
	echo "Executing ${GIT_EXEC} subtree pull --prefix=openfpga-physical \
	git@${GITHUB_COM}.com:${OPENPHY_OWNER}/openfpga-physical.git $${BRANCH} --squash "
	${GIT_EXEC} subtree --squash --prefix=openfpga-physical pull \
	git@${GITHUB_COM}.com:${OPENPHY_OWNER}/openfpga-physical.git $${BRANCH} $${GIT_OPTIONS}
	echo "Pulling new changes to openfpga-physical script"
	git config -unset alias.merge

push_openfpga_physical:
# This target pushes the local changes to openfpga-physical main repository
	BRANCH=$${BRANCH:='main'}
	if [[ "$${BRANCH}" == "main" ]]; then
		echo "**** Use make push BRNACH_NAME=<name> ****"
		echo "subtree push to main branch is not supported "
		exit
	fi
	echo "Trying to push subtree to $${BRANCH}"

	current_dir=$$(pwd)
	gitroot=$$(git rev-parse --show-toplevel)
	rel_path=$$(realpath --relative-to=$${gitroot} $$current_dir)

	echo "current_dir $${current_dir}"
	echo "gitroot     $${gitroot}"
	echo "rel_path    $${rel_path}"

	${GIT_EXEC} subtree push --prefix=openfpga-physical \
			git@${GITHUB_COM}.com:${OPENPHY_OWNER}/openfpga-physical.git $${BRANCH} $${GIT_OPTIONS}

#  >>> deprecated pull_openfpga_physical target performs merge wth no commit <<
#
# diff_openfpga_physical:
# # This target shows diff of local subtree with remote repository
# #
# 	BRANCH=$${BRANCH:='main'}
# 	if ! ${GIT_EXEC} remote | grep "openfpga-physical" > /dev/null; then
# 		echo "[ INFO] Adding openfpga-physical in remote"
# 		git remote add openfpga-physical git@${GITHUB_COM}.com:${OPENPHY_OWNER}/openfpga-physical.git
# 	fi
# 	git fetch --depth 1 openfpga-physical $${BRANCH}
# 	git diff openfpga-physical/$${BRANCH} HEAD:openfpga-physical --name-only

openfpga_physical_version:
# This target shows current version of openfpga-physical in the repository
	echo "TODO"
	echo "Show version from readme file"
	echo "Showlast upadated option"


define COMMENT_EXTRACT
import re
with open ('Makefile', 'r' ) as f:
    matches = re.finditer('^([a-zA-Z-_]*):.*\n#(.*)', f.read(), flags=re.M)
    for _, match in enumerate(matches, start=1):
        header, content = match[1], match[2]
        print(f"  {header:10} {content}")
endef