[PATCH v3 7/8] parse-options: add parse_opt_unknown_cb()
From: Michael Haggerty <hidden>
Date: 2016-09-05 09:45:44
Subsystem:
the rest · Maintainer:
Linus Torvalds
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 <redacted> --- See the next patch for the reason I implemented this change. Let me know if there is an easier way to do this. parse-options-cb.c | 12 ++++++++++++ parse-options.h | 1 + 2 files changed, 13 insertions(+)
diff --git a/parse-options-cb.c b/parse-options-cb.c
index 9667bc7..b5d9209 100644
--- a/parse-options-cb.c
+++ b/parse-options-cb.c@@ -159,6 +159,18 @@ int parse_opt_noop_cb(const struct option *opt, const char *arg, int unset) } /** + * 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. */ static int recreate_opt(struct strbuf *sb, const struct option *opt,
diff --git a/parse-options.h b/parse-options.h
index 78f8384..dcd8a09 100644
--- a/parse-options.h
+++ b/parse-options.h@@ -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);
--
2.9.3