git/trailer.h
Linus Arver 13211ae23f trailer: separate public from internal portion of trailer_iterator
The fields here are not meant to be used by downstream callers, so put
them behind an anonymous struct named as "internal" to warn against
their use. This follows the pattern in 576de3d956 (unpack_trees: start
splitting internal fields from public API, 2023-02-27).

Signed-off-by: Linus Arver <linusa@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-09-11 10:01:18 -07:00

152 lines
3.8 KiB
C

#ifndef TRAILER_H
#define TRAILER_H
#include "list.h"
#include "strbuf.h"
enum trailer_where {
WHERE_DEFAULT,
WHERE_END,
WHERE_AFTER,
WHERE_BEFORE,
WHERE_START
};
enum trailer_if_exists {
EXISTS_DEFAULT,
EXISTS_ADD_IF_DIFFERENT_NEIGHBOR,
EXISTS_ADD_IF_DIFFERENT,
EXISTS_ADD,
EXISTS_REPLACE,
EXISTS_DO_NOTHING
};
enum trailer_if_missing {
MISSING_DEFAULT,
MISSING_ADD,
MISSING_DO_NOTHING
};
int trailer_set_where(enum trailer_where *item, const char *value);
int trailer_set_if_exists(enum trailer_if_exists *item, const char *value);
int trailer_set_if_missing(enum trailer_if_missing *item, const char *value);
struct trailer_info {
/*
* True if there is a blank line before the location pointed to by
* trailer_start.
*/
int blank_line_before_trailer;
/*
* Pointers to the start and end of the trailer block found. If there
* is no trailer block found, these 2 pointers point to the end of the
* input string.
*/
const char *trailer_start, *trailer_end;
/*
* Array of trailers found.
*/
char **trailers;
size_t trailer_nr;
};
/*
* A list that represents newly-added trailers, such as those provided
* with the --trailer command line option of git-interpret-trailers.
*/
struct new_trailer_item {
struct list_head list;
const char *text;
enum trailer_where where;
enum trailer_if_exists if_exists;
enum trailer_if_missing if_missing;
};
struct process_trailer_options {
int in_place;
int trim_empty;
int only_trailers;
int only_input;
int unfold;
int no_divider;
int key_only;
int value_only;
const struct strbuf *separator;
const struct strbuf *key_value_separator;
int (*filter)(const struct strbuf *, void *);
void *filter_data;
};
#define PROCESS_TRAILER_OPTIONS_INIT {0}
void process_trailers(const char *file,
const struct process_trailer_options *opts,
struct list_head *new_trailer_head);
void trailer_info_get(struct trailer_info *info, const char *str,
const struct process_trailer_options *opts);
void trailer_info_release(struct trailer_info *info);
/*
* Format the trailers from the commit msg "msg" into the strbuf "out".
* Note two caveats about "opts":
*
* - this is primarily a helper for pretty.c, and not
* all of the flags are supported.
*
* - this differs from process_trailers slightly in that we always format
* only the trailer block itself, even if the "only_trailers" option is not
* set.
*/
void format_trailers_from_commit(struct strbuf *out, const char *msg,
const struct process_trailer_options *opts);
/*
* An interface for iterating over the trailers found in a particular commit
* message. Use like:
*
* struct trailer_iterator iter;
* trailer_iterator_init(&iter, msg);
* while (trailer_iterator_advance(&iter))
* ... do something with iter.key and iter.val ...
* trailer_iterator_release(&iter);
*/
struct trailer_iterator {
struct strbuf key;
struct strbuf val;
/* private */
struct {
struct trailer_info info;
size_t cur;
} internal;
};
/*
* Initialize "iter" in preparation for walking over the trailers in the commit
* message "msg". The "msg" pointer must remain valid until the iterator is
* released.
*
* After initializing, note that key/val will not yet point to any trailer.
* Call advance() to parse the first one (if any).
*/
void trailer_iterator_init(struct trailer_iterator *iter, const char *msg);
/*
* Advance to the next trailer of the iterator. Returns 0 if there is no such
* trailer, and 1 otherwise. The key and value of the trailer can be
* fetched from the iter->key and iter->value fields (which are valid
* only until the next advance).
*/
int trailer_iterator_advance(struct trailer_iterator *iter);
/*
* Release all resources associated with the trailer iteration.
*/
void trailer_iterator_release(struct trailer_iterator *iter);
#endif /* TRAILER_H */