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common: Add feature to ease using argparse's usage().

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* common/argparse.c (show_help): Take care of flag value
(usage): Ditto.
--

It is common that the long usage note starts with the short usage
note.  The new flag feature allows to combine both.

Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch 2015-03-17 11:22:28 +01:00
parent eb5f2c0af6
commit 9078b75a73
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GPG Key ID: E3FDFF218E45B72B
1 changed files with 20 additions and 0 deletions
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20
common/argparse.c
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@ -1239,6 +1239,14 @@ show_help (ARGPARSE_OPTS *opts, unsigned int flags)
show_version ();
writestrings (0, "\n", NULL);
s = strusage (42);
if (s && *s == '1')
{
s = strusage (40);
writestrings (1, s, NULL);
if (*s && s[strlen(s)] != '\n')
writestrings (1, "\n", NULL);
}
s = strusage(41);
writestrings (0, s, "\n", NULL);
if ( opts[0].description )
@ -1432,6 +1440,14 @@ usage (int level)
}
else if (level == 2)
{
p = strusage (42);
if (p && *p == '1')
{
p = strusage (40);
writestrings (1, p, NULL);
if (*p && p[strlen(p)] != '\n')
writestrings (1, "\n", NULL);
}
writestrings (0, strusage(41), "\n", NULL);
exit (0);
}
@ -1455,6 +1471,10 @@ usage (int level)
*30..39: Additional program info (with LFs)
* 40: short usage note (with LF)
* 41: long usage note (with LF)
* 42: Flag string:
* First char is '1':
* The short usage notes needs to be printed
* before the long usage note.
*/
const char *
strusage( int level )