git/trailer.h
Linus Arver 3452d17324 trailer: finish formatting unification
Rename format_trailer_info() to format_trailers(). Finally, both
interpret-trailers and format_trailers_from_commit() can call
"format_trailers()"!

Update the comment in <trailer.h> to remove the (now obsolete) caveats
about format_trailers_from_commit(). Those caveats come from
a388b10fc1 (pretty: move trailer formatting to trailer.c, 2017-08-15)
where it says:

    pretty: move trailer formatting to trailer.c

    The next commit will add many features to the %(trailer)
    placeholder in pretty.c. We'll need to access some internal
    functions of trailer.c for that, so our options are either:

      1. expose those functions publicly

    or

      2. make an entry point into trailer.c to do the formatting

    Doing (2) ends up exposing less surface area, though do note
    that caveats in the docstring of the new function.

which suggests format_trailers_from_commit() started out from pretty.c
and did not have access to all of the trailer implementation internals,
and was never intended to replace (unify) the formatting machinery in
trailer.c. The refactors leading up to this commit (as well as
additional refactors that will follow) expose additional functions
publicly, and is therefore choosing option (1) as described in
a388b10fc1.

Signed-off-by: Linus Arver <linusa@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-03-15 10:10:25 -07:00

162 lines
4.1 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_block_start.
*/
int blank_line_before_trailer;
/*
* Offsets to the trailer block start and end positions in the input
* string. If no trailer block is found, these are both set to the
* "true" end of the input (find_end_of_log_message()).
*/
size_t trailer_block_start, trailer_block_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 parse_trailers_from_config(struct list_head *config_head);
void parse_trailers_from_command_line_args(struct list_head *arg_head,
struct list_head *new_trailer_head);
void process_trailers_lists(struct list_head *head,
struct list_head *arg_head);
void parse_trailers(const struct process_trailer_options *,
struct trailer_info *,
const char *str,
struct list_head *head);
void trailer_info_get(const struct process_trailer_options *,
const char *str,
struct trailer_info *);
void trailer_info_release(struct trailer_info *info);
void trailer_config_init(void);
void format_trailers(const struct process_trailer_options *,
struct list_head *trailers,
struct strbuf *out);
void free_trailers(struct list_head *);
/*
* Convenience function to format the trailers from the commit msg "msg" into
* the strbuf "out". Reuses format_trailers() internally.
*/
void format_trailers_from_commit(const struct process_trailer_options *,
const char *msg,
struct strbuf *out);
/*
* 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 */