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new.py
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executable file
·194 lines (144 loc) · 5.16 KB
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#!/usr/bin/env python3
"""
Author : Ken Youens-Clark <kyclark@gmail.com>
Purpose: Python program to write a Python program
"""
import argparse
import os
import platform
import re
import subprocess
import sys
from datetime import date
from pathlib import Path
from typing import NamedTuple
class Args(NamedTuple):
program: str
name: str
email: str
purpose: str
overwrite: bool
# --------------------------------------------------
def get_args() -> Args:
"""Get arguments"""
parser = argparse.ArgumentParser(
description='Create Python argparse program',
formatter_class=argparse.ArgumentDefaultsHelpFormatter)
defaults = get_defaults()
username = os.getenv('USER') or 'Anonymous'
hostname = os.getenv('HOSTNAME') or 'localhost'
parser.add_argument('program', help='Program name', type=str)
parser.add_argument('-n',
'--name',
type=str,
default=defaults.get('name', username),
help='Name for docstring')
parser.add_argument('-e',
'--email',
type=str,
default=defaults.get('email', f'{username}@{hostname}'),
help='Email for docstring')
parser.add_argument('-p',
'--purpose',
type=str,
default=defaults.get('purpose', 'Rock the Casbah'),
help='Purpose for docstring')
parser.add_argument('-f',
'--force',
help='Overwrite existing',
action='store_true')
args = parser.parse_args()
args.program = args.program.strip().replace('-', '_')
if not args.program:
parser.error(f'Not a usable filename "{args.program}"')
return Args(args.program, args.name, args.email, args.purpose, args.force)
# --------------------------------------------------
def main() -> None:
"""Make a jazz noise here"""
args = get_args()
program = args.program
if os.path.isfile(program) and not args.overwrite:
answer = input(f'"{program}" exists. Overwrite? [yN] ')
if not answer.lower().startswith('y'):
sys.exit('Will not overwrite. Bye!')
print(body(args), file=open(program, 'wt'), end='')
if platform.system() != 'Windows':
subprocess.run(['chmod', '+x', program], check=True)
print(f'Done, see new script "{program}."')
# --------------------------------------------------
def body(args: Args) -> str:
""" The program template """
today = str(date.today())
return f"""#!/usr/bin/env python3
\"\"\"
Author : {args.name}{' <' + args.email + '>' if args.email else ''}
Date : {today}
Purpose: {args.purpose}
\"\"\"
import argparse
# --------------------------------------------------
def get_args():
\"\"\"Get command-line arguments\"\"\"
parser = argparse.ArgumentParser(
description='{args.purpose}',
formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument('positional',
metavar='str',
help='A positional argument')
parser.add_argument('-a',
'--arg',
help='A named string argument',
metavar='str',
type=str,
default='')
parser.add_argument('-i',
'--int',
help='A named integer argument',
metavar='int',
type=int,
default=0)
parser.add_argument('-f',
'--file',
help='A readable file',
metavar='FILE',
type=argparse.FileType('rt'),
default=None)
parser.add_argument('-o',
'--on',
help='A boolean flag',
action='store_true')
return parser.parse_args()
# --------------------------------------------------
def main():
\"\"\"Make a jazz noise here\"\"\"
args = get_args()
str_arg = args.arg
int_arg = args.int
file_arg = args.file
flag_arg = args.on
pos_arg = args.positional
print(f'str_arg = "{{str_arg}}"')
print(f'int_arg = "{{int_arg}}"')
print('file_arg = "{{}}"'.format(file_arg.name if file_arg else ''))
print(f'flag_arg = "{{flag_arg}}"')
print(f'positional = "{{pos_arg}}"')
# --------------------------------------------------
if __name__ == '__main__':
main()
"""
# --------------------------------------------------
def get_defaults():
"""Get defaults from ~/.new.py"""
rc = os.path.join(str(Path.home()), '.new.py')
defaults = {}
if os.path.isfile(rc):
for line in open(rc):
match = re.match('([^=]+)=([^=]+)', line)
if match:
key, val = map(str.strip, match.groups())
if key and val:
defaults[key] = val
return defaults
# --------------------------------------------------
if __name__ == '__main__':
main()