From 6b3ee18dc5c620d7cb4324e009339b5ca9ac488c Mon Sep 17 00:00:00 2001 From: Paul Tan Date: Sun, 14 Jun 2015 16:41:48 +0800 Subject: parse-options-cb: implement parse_opt_passthru() Certain git commands, such as git-pull, are simply wrappers around other git commands like git-fetch, git-merge and git-rebase. As such, these wrapper commands will typically need to "pass through" command-line options of the commands they wrap. Implement the parse_opt_passthru() parse-options callback, which will reconstruct the command-line option into an char* string, such that it can be passed to another git command. Helped-by: Johannes Schindelin Helped-by: Junio C Hamano Helped-by: Stefan Beller Signed-off-by: Paul Tan Signed-off-by: Junio C Hamano --- parse-options-cb.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) (limited to 'parse-options-cb.c') diff --git a/parse-options-cb.c b/parse-options-cb.c index be8c413cfe..68bc593341 100644 --- a/parse-options-cb.c +++ b/parse-options-cb.c @@ -134,3 +134,52 @@ int parse_opt_noop_cb(const struct option *opt, const char *arg, int unset) { return 0; } + +/** + * Recreates the command-line option in the strbuf. + */ +static int recreate_opt(struct strbuf *sb, const struct option *opt, + const char *arg, int unset) +{ + strbuf_reset(sb); + + if (opt->long_name) { + strbuf_addstr(sb, unset ? "--no-" : "--"); + strbuf_addstr(sb, opt->long_name); + if (arg) { + strbuf_addch(sb, '='); + strbuf_addstr(sb, arg); + } + } else if (opt->short_name && !unset) { + strbuf_addch(sb, '-'); + strbuf_addch(sb, opt->short_name); + if (arg) + strbuf_addstr(sb, arg); + } else + return -1; + + return 0; +} + +/** + * For an option opt, recreates the command-line option in opt->value which + * must be an char* initialized to NULL. This is useful when we need to pass + * the command-line option to another command. Since any previous value will be + * overwritten, this callback should only be used for options where the last + * one wins. + */ +int parse_opt_passthru(const struct option *opt, const char *arg, int unset) +{ + static struct strbuf sb = STRBUF_INIT; + char **opt_value = opt->value; + + if (recreate_opt(&sb, opt, arg, unset) < 0) + return -1; + + if (*opt_value) + free(*opt_value); + + *opt_value = strbuf_detach(&sb, NULL); + + return 0; +} -- cgit v1.3