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path: root/contrib/libs/python/gen_includes.py
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import sys
import os
import errno
from os import listdir
from os.path import dirname, relpath, join 

 
def ensure_dir_exists(path):
    try:
        os.makedirs(path)
    except OSError as e:
        if e.errno == errno.EEXIST and os.path.isdir(path):
            pass
        else:
            raise

 
def make_dir(directory):
    if not os.path.exists(directory):
        os.makedirs(directory)

 
def files(directory): 
    for dirpath, dirnames, filenames in os.walk(directory): 
        for name in filenames: 
            yield relpath(join(dirpath, name), directory) 
 
 
def headers_set(directory):
    return { 
        f for f in files(directory) 
        if f.endswith('.h') and not f.startswith('internal/') 
    } 

 
if __name__ == "__main__":

    python2_path = sys.argv[1]
    python3_path = sys.argv[2]
    output_path = sys.argv[3]

    ensure_dir_exists(join('.', python2_path))
    ensure_dir_exists(join('.', python3_path))

    only_headers2 = headers_set(python2_path) 
    only_headers3 = headers_set(python3_path) 
    all_headers = only_headers2 | only_headers3 
 
    for header in all_headers: 
        path = join(output_path, header) 
        make_dir(dirname(path)) 
        f = open(path, 'w') 
        f.write('#pragma once\n\n') 
        f.write('#ifdef USE_PYTHON3\n') 
        if (header in only_headers3): 
            f.write('#include <' + join(python3_path, header) + '>\n') 
        else: 
            f.write('#error "No <' + header + '> in Python3"\n') 
        f.write('#else\n') 
        if (header in only_headers2): 
            f.write('#include <' + join(python2_path, header) + '>\n') 
        else: 
            f.write('#error "No <' + header + '> in Python2"\n') 
        f.write('#endif\n')