Re: [PATCH 2/5] makedocbook: Use sys.exit()

Hi,

I'm no committer, so don't take my comment as such.

On 2022-11-04 14:49, Jon Turney wrote:
> Use sys.exit() to write a message to stderr and terminate with a
> non-zero exit code.
> ---
>   newlib/doc/makedocbook.py | 16 ++++++----------
>   1 file changed, 6 insertions(+), 10 deletions(-)
> 
> diff --git a/newlib/doc/makedocbook.py b/newlib/doc/makedocbook.py
> index 5e46082df..57cd23bfd 100755
> --- a/newlib/doc/makedocbook.py
> +++ b/newlib/doc/makedocbook.py
> @@ -214,8 +214,7 @@ def function(c, l):
>   
>       # FUNCTION implies starting a new refentry
>       if refentry is not None:
> -        print("multiple FUNCTIONs without NEWPAGE", file=sys.stderr)
> -        exit(1)
> +        sys.exit("multiple FUNCTIONs without NEWPAGE")
>   
>       # create the refentry
>       refentry = lxml.etree.SubElement(rootelement, 'refentry')
> @@ -308,17 +307,15 @@ def synopsis(c, t):
>   
>               # a prototype without a terminating ';' is an error
>               if s.endswith(')'):
> -                print("'%s' missing terminating semicolon" % l, file=sys.stderr)
> +                sys.exit("'%s' missing terminating semicolon" % l)

I'm not sure when it was introduced in python, but you can use this syntax:
sys.exit(f"'{l}' missing terminating semicolon")

If you don't want to use this fancy syntax, consider to at least do:
sys.exit("'%s' missing terminating semicolon" % (l,))


Kind regards,
Torbjörn

>                   s = s + ';'
> -                exit(1)
>   
>               if ';' in s:
>                   synopsis_for_prototype(funcsynopsis, s)
>                   s = ''
>   
>       if s.strip():
> -        print("surplus synopsis '%s'" % s, file=sys.stderr)
> -        exit(1)
> +        sys.exit("surplus synopsis '%s'" % s)
>   
>   def synopsis_for_prototype(funcsynopsis, s):
>       s = s.strip()
> @@ -591,8 +588,7 @@ def t_eof(t):
>   
>   # Error handling rule
>   def t_error(t):
> -    print("tokenization error, remaining text '%s'" % t.value, file=sys.stderr)
> -    exit(1)
> +    sys.exit("tokenization error, remaining text '%s'" % t.value)
>   
>   lexer = lex.lex()
>   
> @@ -795,8 +791,8 @@ def p_multitable(p):
>       parser_verbose(p)
>   
>   def p_error(t):
> -    print('parse error at line %d, token %s, next token %s' % (t.lineno, t, parser.token()), file=sys.stderr)
> -    exit(1)
> +    sys.exit('parse error at line %d, token %s, next token %s' % (t.lineno, t, parser.token()))
> +
>   
>   # protect creating the parser with a lockfile, so that when multiple processes
>   # are running this script simultaneously, we don't get one of them generating a