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#!/usr/bin/env python
import argparse
import io
import os
import re
max_name_len = 60
re_name = re.compile(r'^[a-z][a-z0-9_]*$')
re_group = re.compile(r'//BEGIN')
re_option = re.compile(r'extern (Bounded)?Option<[^>]+>')
re_default = re.compile(r' *// *= *(.*)')
groups = []
root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
script = os.path.relpath(__file__, root)
# =============================================================================
class Group(object):
# -------------------------------------------------------------------------
def __init__(self, desc):
self.desc = desc
self.options = []
# -------------------------------------------------------------------------
def append(self, option):
self.options.append(option)
# =============================================================================
class Option(object):
# -------------------------------------------------------------------------
def __init__(self, name, dval, decl, desc):
if re_name.match(name) is None:
raise ValueError('{!r} is not a valid option name'.format(name))
if len(name) > max_name_len:
raise ValueError(
'{!r} (length={:d}) exceeds the maximum length {:d}'.format(
name, len(name), max_name_len))
self.desc = u'\n'.join(desc)
self.decl = decl[7:]
self.name = name
self.dval = dval
# -------------------------------------------------------------------------
def write_declaration(self, out):
out.write(u'{} {} = {{\n'.format(self.decl, self.name))
out.write(u' "{}",\n'.format(self.name))
out.write(u' u8R"__(\n{}\n)__"'.format(self.desc))
if self.dval is not None:
out.write(u',\n {}'.format(self.dval))
out.write(u'\n};\n\n')
# %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
# -----------------------------------------------------------------------------
def extract_default(decl):
m = re_default.match(decl)
if m:
return m.group(1)
return None
# -----------------------------------------------------------------------------
def write_banner(out, args):
out.write(
u'/**\n'
u' * @file {out_name}\n'
u' * Declaration and initializers for all options.\n'
u' * Automatically generated by <code>{script}</code>\n'
u' * from {in_name}.\n'
u' */\n'
u'\n'.format(
in_name=os.path.basename(args.header),
out_name=os.path.basename(args.output),
script=script))
# -----------------------------------------------------------------------------
def write_declarations(out, args):
for group in groups:
for option in group.options:
option.write_declaration(out)
# -----------------------------------------------------------------------------
def write_registrations(out, args):
for group in groups:
out.write(u'\n begin_option_group(u8R"__(\n{}\n)__");\n\n'.format(
group.desc))
for option in group.options:
out.write(u' register_option(&options::{});\n'.format(
option.name))
# -----------------------------------------------------------------------------
def main():
parser = argparse.ArgumentParser(description='Generate options.cpp')
parser.add_argument('output', type=str,
help='location of options.cpp to write')
parser.add_argument('header', type=str,
help='location of options.h to read')
parser.add_argument('template', type=str,
help='location of options.cpp.in to use as template')
args = parser.parse_args()
with io.open(args.header, 'rt', encoding='utf-8') as f:
desc = []
for line in iter(f.readline, ''):
line = line.strip()
if re_group.match(line):
groups.append(Group(line[8:]))
elif not len(line):
desc = []
elif line == '//':
desc.append('')
elif line.startswith('// '):
desc.append(line[3:])
elif re_option.match(line):
n, d = f.readline().split(';')
o = Option(n, extract_default(d.strip()), line, desc)
groups[-1].append(o)
replacements = {
u'##BANNER##': write_banner,
u'##DECLARATIONS##': write_declarations,
u'##REGISTRATIONS##': write_registrations,
}
with io.open(args.output, 'wt', encoding='utf-8') as out:
with io.open(args.template, 'rt', encoding='utf-8') as t:
for line in t:
directive = line.strip()
if directive in replacements:
replacements[directive](out, args)
else:
out.write(line)
# %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
if __name__ == '__main__':
main()
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