Re: [PATCH v8 4/7] scripts: add block-coroutine-wrapper.py

[Eric Blake <eblake@redhat.com>]

On 9/15/20 11:44 AM, Vladimir Sementsov-Ogievskiy wrote:
> We have a very frequent pattern of creating coroutine from function
> with several arguments:
> 

> +++ b/scripts/block-coroutine-wrapper.py
> @@ -0,0 +1,187 @@
> +#!/usr/bin/env python3
> +"""Generate coroutine wrappers for block subsystem.

Looking at the generated file after patch 5 is applied,...


> +
> +def gen_header():
> +    copyright = re.sub('^.*Copyright', 'Copyright', __doc__, flags=re.DOTALL)
> +    copyright = re.sub('^(?=.)', ' * ', copyright.strip(), flags=re.MULTILINE)
> +    copyright = re.sub('^$', ' *', copyright, flags=re.MULTILINE)
> +    return f"""\

This generated comment...


> +
> +
> +def gen_wrappers_file(input_code: str) -> str:
> +    res = gen_header()

...is getting inserted into the generated file...

> +    for func in func_decl_iter(input_code):
> +        res += '\n\n\n'
> +        res += gen_wrapper(func)
> +
> +    return prettify(res)  # prettify to wrap long lines
> +
> +
> +if __name__ == '__main__':
> +    if len(sys.argv) < 3:
> +        exit(f'Usage: {sys.argv[0]} OUT_FILE.c IN_FILE.[ch]...')
> +
> +    with open(sys.argv[1], 'w') as f_out:
> +        for fname in sys.argv[2:]:
> +            with open(fname) as f_in:
> +                f_out.write(gen_wrappers_file(f_in.read()))

multiple times.  You'll want to hoist the call to gen_header outside the 
loop over fname in sys.argv[2:].

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3226
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