git/builtin/interpret-trailers.c
Jeff King 1688c9a489 interpret-trailers: allow suppressing "---" divider
Even with the newly-tightened "---" parser, it's still
possible for a commit message to trigger a false positive if
it contains something like "--- foo". If the caller knows
that it has only a single commit message, it can now tell us
with the "--no-divider" option, eliminating any false
positives.

If we were designing this from scratch, I'd probably make
this the default. But we've advertised the "---" behavior in
the documentation since interpret-trailers has existed.
Since it's meant to be scripted, breaking that would be a
bad idea.

Note that the logic is in the underlying trailer.c code,
which is used elsewhere. The default there will keep the
current behavior, but many callers will benefit from setting
this new option. That's left for future patches.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-08-23 10:08:51 -07:00

136 lines
3.6 KiB
C

/*
* Builtin "git interpret-trailers"
*
* Copyright (c) 2013, 2014 Christian Couder <chriscool@tuxfamily.org>
*
*/
#include "cache.h"
#include "builtin.h"
#include "parse-options.h"
#include "string-list.h"
#include "trailer.h"
static const char * const git_interpret_trailers_usage[] = {
N_("git interpret-trailers [--in-place] [--trim-empty] [(--trailer <token>[(=|:)<value>])...] [<file>...]"),
NULL
};
static enum trailer_where where;
static enum trailer_if_exists if_exists;
static enum trailer_if_missing if_missing;
static int option_parse_where(const struct option *opt,
const char *arg, int unset)
{
return trailer_set_where(&where, arg);
}
static int option_parse_if_exists(const struct option *opt,
const char *arg, int unset)
{
return trailer_set_if_exists(&if_exists, arg);
}
static int option_parse_if_missing(const struct option *opt,
const char *arg, int unset)
{
return trailer_set_if_missing(&if_missing, arg);
}
static void new_trailers_clear(struct list_head *trailers)
{
struct list_head *pos, *tmp;
struct new_trailer_item *item;
list_for_each_safe(pos, tmp, trailers) {
item = list_entry(pos, struct new_trailer_item, list);
list_del(pos);
free(item);
}
}
static int option_parse_trailer(const struct option *opt,
const char *arg, int unset)
{
struct list_head *trailers = opt->value;
struct new_trailer_item *item;
if (unset) {
new_trailers_clear(trailers);
return 0;
}
if (!arg)
return -1;
item = xmalloc(sizeof(*item));
item->text = arg;
item->where = where;
item->if_exists = if_exists;
item->if_missing = if_missing;
list_add_tail(&item->list, trailers);
return 0;
}
static int parse_opt_parse(const struct option *opt, const char *arg,
int unset)
{
struct process_trailer_options *v = opt->value;
v->only_trailers = 1;
v->only_input = 1;
v->unfold = 1;
return 0;
}
int cmd_interpret_trailers(int argc, const char **argv, const char *prefix)
{
struct process_trailer_options opts = PROCESS_TRAILER_OPTIONS_INIT;
LIST_HEAD(trailers);
struct option options[] = {
OPT_BOOL(0, "in-place", &opts.in_place, N_("edit files in place")),
OPT_BOOL(0, "trim-empty", &opts.trim_empty, N_("trim empty trailers")),
OPT_CALLBACK(0, "where", NULL, N_("action"),
N_("where to place the new trailer"), option_parse_where),
OPT_CALLBACK(0, "if-exists", NULL, N_("action"),
N_("action if trailer already exists"), option_parse_if_exists),
OPT_CALLBACK(0, "if-missing", NULL, N_("action"),
N_("action if trailer is missing"), option_parse_if_missing),
OPT_BOOL(0, "only-trailers", &opts.only_trailers, N_("output only the trailers")),
OPT_BOOL(0, "only-input", &opts.only_input, N_("do not apply config rules")),
OPT_BOOL(0, "unfold", &opts.unfold, N_("join whitespace-continued values")),
{ OPTION_CALLBACK, 0, "parse", &opts, NULL, N_("set parsing options"),
PARSE_OPT_NOARG | PARSE_OPT_NONEG, parse_opt_parse },
OPT_BOOL(0, "no-divider", &opts.no_divider, N_("do not treat --- specially")),
OPT_CALLBACK(0, "trailer", &trailers, N_("trailer"),
N_("trailer(s) to add"), option_parse_trailer),
OPT_END()
};
argc = parse_options(argc, argv, prefix, options,
git_interpret_trailers_usage, 0);
if (opts.only_input && !list_empty(&trailers))
usage_msg_opt(
_("--trailer with --only-input does not make sense"),
git_interpret_trailers_usage,
options);
if (argc) {
int i;
for (i = 0; i < argc; i++)
process_trailers(argv[i], &opts, &trailers);
} else {
if (opts.in_place)
die(_("no input file given for in-place editing"));
process_trailers(NULL, &opts, &trailers);
}
new_trailers_clear(&trailers);
return 0;
}