git/pretty.h
Jeff King b2086b5183 log: avoid loading decorations for userformats that don't need it
If no --decorate option is given, we default to auto-decoration. And
when that kicks in, cmd_log_init_finish() will unconditionally load the
decoration refs.

However, if we are using a user-format that does not include "%d" or
"%D", we won't show the decorations at all, so we don't need to load
them. We can detect this case and auto-disable them by adding a new
field to our userformat_want helper. We can do this even when the user
explicitly asked for --decorate, because it can't affect the output at
all.

This patch consistently reduces the time to run "git log -1 --format=%H"
on my git.git clone (with ~2k refs) from 34ms to 7ms. On a much more
extreme real-world repository (with ~220k refs), it goes from 2.5s to
4ms.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-06-28 20:30:17 -07:00

167 lines
4.5 KiB
C

#ifndef PRETTY_H
#define PRETTY_H
#include "cache.h"
#include "string-list.h"
struct commit;
struct strbuf;
struct process_trailer_options;
/* Commit formats */
enum cmit_fmt {
CMIT_FMT_RAW,
CMIT_FMT_MEDIUM,
CMIT_FMT_DEFAULT = CMIT_FMT_MEDIUM,
CMIT_FMT_SHORT,
CMIT_FMT_FULL,
CMIT_FMT_FULLER,
CMIT_FMT_ONELINE,
CMIT_FMT_EMAIL,
CMIT_FMT_MBOXRD,
CMIT_FMT_USERFORMAT,
CMIT_FMT_UNSPECIFIED
};
struct pretty_print_describe_status {
unsigned int max_invocations;
};
struct pretty_print_context {
/*
* Callers should tweak these to change the behavior of pp_* functions.
*/
enum cmit_fmt fmt;
int abbrev;
const char *after_subject;
int preserve_subject;
struct date_mode date_mode;
unsigned date_mode_explicit:1;
int print_email_subject;
int expand_tabs_in_log;
int need_8bit_cte;
char *notes_message;
struct reflog_walk_info *reflog_info;
struct rev_info *rev;
const char *output_encoding;
struct string_list *mailmap;
int color;
struct ident_split *from_ident;
unsigned encode_email_headers:1;
struct pretty_print_describe_status *describe_status;
/*
* Fields below here are manipulated internally by pp_* functions and
* should not be counted on by callers.
*/
struct string_list in_body_headers;
int graph_width;
};
/* Check whether commit format is mail. */
static inline int cmit_fmt_is_mail(enum cmit_fmt fmt)
{
return (fmt == CMIT_FMT_EMAIL || fmt == CMIT_FMT_MBOXRD);
}
/*
* Examine the user-specified format given by "fmt" (or if NULL, the global one
* previously saved by get_commit_format()), and set flags based on which items
* the format will need when it is expanded.
*/
struct userformat_want {
unsigned notes:1;
unsigned source:1;
unsigned decorate:1;
};
void userformat_find_requirements(const char *fmt, struct userformat_want *w);
/*
* Shortcut for invoking pretty_print_commit if we do not have any context.
* Context would be set empty except "fmt".
*/
void pp_commit_easy(enum cmit_fmt fmt, const struct commit *commit,
struct strbuf *sb);
/*
* Get information about user and date from "line", format it and
* put it into "sb".
* Format of "line" must be readable for split_ident_line function.
* The resulting format is "what: name <email> date".
*/
void pp_user_info(struct pretty_print_context *pp, const char *what,
struct strbuf *sb, const char *line,
const char *encoding);
/*
* Format title line of commit message taken from "msg_p" and
* put it into "sb".
* First line of "msg_p" is also affected.
*/
void pp_title_line(struct pretty_print_context *pp, const char **msg_p,
struct strbuf *sb, const char *encoding,
int need_8bit_cte);
/*
* Get current state of commit message from "msg_p" and continue formatting
* by adding indentation and '>' signs. Put result into "sb".
*/
void pp_remainder(struct pretty_print_context *pp, const char **msg_p,
struct strbuf *sb, int indent);
/*
* Create a text message about commit using given "format" and "context".
* Put the result to "sb".
* Please use this function for custom formats.
*/
void repo_format_commit_message(struct repository *r,
const struct commit *commit,
const char *format, struct strbuf *sb,
const struct pretty_print_context *context);
#ifndef NO_THE_REPOSITORY_COMPATIBILITY_MACROS
#define format_commit_message(c, f, s, con) \
repo_format_commit_message(the_repository, c, f, s, con)
#endif
/*
* Parse given arguments from "arg", check it for correctness and
* fill struct rev_info.
*/
void get_commit_format(const char *arg, struct rev_info *);
/*
* Make a commit message with all rules from given "pp"
* and put it into "sb".
* Please use this function if you have a context (candidate for "pp").
*/
void pretty_print_commit(struct pretty_print_context *pp,
const struct commit *commit,
struct strbuf *sb);
/*
* Change line breaks in "msg" to "line_separator" and put it into "sb".
* Return "msg" itself.
*/
const char *format_subject(struct strbuf *sb, const char *msg,
const char *line_separator);
/* Check if "cmit_fmt" will produce an empty output. */
int commit_format_is_empty(enum cmit_fmt);
/* Make subject of commit message suitable for filename */
void format_sanitized_subject(struct strbuf *sb, const char *msg, size_t len);
/*
* Set values of fields in "struct process_trailer_options"
* according to trailers arguments.
*/
int format_set_trailers_options(struct process_trailer_options *opts,
struct string_list *filter_list,
struct strbuf *sepbuf,
struct strbuf *kvsepbuf,
const char **arg,
char **invalid_arg);
#endif /* PRETTY_H */