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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""Get all the dependencies of RGBDS assembly files recursively,
and output them using Make dependency syntax.
"""
# Script adapted from the Telefang disassembly / fan translation project.
from __future__ import print_function
from __future__ import unicode_literals
import argparse
import os
import re
import sys
if sys.version_info[0] < 3:
from codecs import open
INCLUDE_RE = re.compile(r"^(?:[a-zA-Z0-9_.]+:?:?)?\s*(INC(?:LUDE|BIN))", re.IGNORECASE)
def dependencies_in(asm_file_paths, build_dirs=[]):
asm_file_paths = list(asm_file_paths)
dependencies = {}
for path in asm_file_paths:
if path not in dependencies:
asm_dependencies, bin_dependencies = shallow_dependencies_of(path, build_dirs)
dependencies[path] = asm_dependencies | bin_dependencies
asm_file_paths += asm_dependencies
return dependencies
def shallow_dependencies_of(asm_file_path, build_dirs=[]):
asm_dependencies = set()
bin_dependencies = set()
with open(asm_file_path, 'r', encoding='utf-8') as f:
for line in f:
m = INCLUDE_RE.match(line)
if m is None:
continue
keyword = m.group(1).upper()
line = line.split(';', 1)[0]
# RGBDS treats absolute(-looking) paths as relative,
# so leading slashes should be stripped.
path = line[line.index('"') + 1:line.rindex('"')].lstrip('/')
if keyword == 'INCLUDE':
asm_dependencies.add(path)
else:
if os.path.isfile(path) or not build_dirs:
bin_dependencies.add(path)
else:
bin_dependencies.update(os.path.join(d, path) for d in build_dirs)
return asm_dependencies, bin_dependencies
def main(argv):
script_name = os.path.basename(__file__)
parser = argparse.ArgumentParser(prog=script_name, add_help=False)
parser.add_argument('-h', '--help', action='help', help="Show this help and exit.")
parser.add_argument('-b', metavar="build directories", action='append', default=[],
help="Build directory to generate dependencies for "
"if files don't exist at the exact path specified. "
"Multiple build directories may be specified.")
parser.add_argument('files', metavar='file', nargs='+',
help="An assembly file to generate dependencies for.")
args = parser.parse_args(argv)
for path, dependencies in dependencies_in(args.files, args.b).items():
# It seems that if A depends on B which depends on C, and
# C is modified, Make needs you to change the modification
# time of B too. That's the reason for the "@touch $@".
# This does mean mtimes on .asm files are updated when building,
# but the alternative opens up a whole can of problems.
if dependencies:
print("{}: {}\n\t@touch $@".format(path, ' '.join(dependencies)))
if __name__ == '__main__':
main(sys.argv[1:])
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