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parse-options: add parse_opt_unknown_cb()

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Add a new callback function, parse_opt_unknown_cb(), which returns -2 to
indicate that the corresponding option is unknown. This can be used to
add "-h" documentation for an option that will be handled externally to
parse_options().

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Michael Haggerty 2016-09-05 11:44:52 +02:00 committed by Junio C Hamano
parent 433860f3d0
commit ce564eb1bd
2 changed files with 13 additions and 0 deletions
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12
parse-options-cb.c
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@ -153,6 +153,18 @@ int parse_opt_noop_cb(const struct option *opt, const char *arg, int unset)
return 0;
}
/**
* Report that the option is unknown, so that other code can handle
* it. This can be used as a callback together with
* OPTION_LOWLEVEL_CALLBACK to allow an option to be documented in the
* "-h" output even if it's not being handled directly by
* parse_options().
*/
int parse_opt_unknown_cb(const struct option *opt, const char *arg, int unset)
{
return -2;
}
/**
* Recreates the command-line option in the strbuf.
*/

1
parse-options.h
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@ -228,6 +228,7 @@ extern int parse_opt_commits(const struct option *, const char *, int);
extern int parse_opt_tertiary(const struct option *, const char *, int);
extern int parse_opt_string_list(const struct option *, const char *, int);
extern int parse_opt_noop_cb(const struct option *, const char *, int);
extern int parse_opt_unknown_cb(const struct option *, const char *, int);
extern int parse_opt_passthru(const struct option *, const char *, int);
extern int parse_opt_passthru_argv(const struct option *, const char *, int);