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pretty: make empty userformats truly empty 

If the user provides an empty format with "--format=", we
end up putting in extra whitespace that the user cannot
prevent. This comes from two places:

  1. If the format is missing a terminating newline, we add
     one automatically. This makes sense for --format=%h, but
     not for a truly empty format.

  2. We add an extra newline between the pretty-printed
     format and a diff or diffstat. If the format is empty,
     there's no point in doing so if there's nothing to
     separate.

With this patch, one can get a diff with no other cruft out
of "diff-tree --format= $commit".

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2014-07-29 13:56:48 -04:00 committed by Junio C Hamano
parent c75e7ad28a
commit b9c7d6e433
4 changed files with 11 additions and 3 deletions
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3
combine-diff.c
View File

@ -1397,7 +1397,8 @@ void diff_tree_combined(const unsigned char *sha1,
show_log(rev);
if (rev->verbose_header && opt->output_format &&
opt->output_format != DIFF_FORMAT_NO_OUTPUT)
opt->output_format != DIFF_FORMAT_NO_OUTPUT &&
!commit_format_is_empty(rev->commit_format))
printf("%s%c", diff_line_prefix(opt),
opt->line_termination);
}

1
commit.h
View File

@ -159,6 +159,7 @@ extern void get_commit_format(const char *arg, struct rev_info *);
extern const char *format_subject(struct strbuf *sb, const char *msg,
const char *line_separator);
extern void userformat_find_requirements(const char *fmt, struct userformat_want *w);
extern int commit_format_is_empty(enum cmit_fmt);
extern void format_commit_message(const struct commit *commit,
const char *format, struct strbuf *sb,
const struct pretty_print_context *context);

5
log-tree.c
View File

@ -649,7 +649,7 @@ void show_log(struct rev_info *opt)
graph_show_commit_msg(opt->graph, &msgbuf);
else
fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout);
if (opt->use_terminator) {
if (opt->use_terminator && !commit_format_is_empty(opt->commit_format)) {
if (!opt->missing_newline)
graph_show_padding(opt->graph);
putchar(opt->diffopt.line_termination);
@ -676,7 +676,8 @@ int log_tree_diff_flush(struct rev_info *opt)
show_log(opt);
if ((opt->diffopt.output_format & ~DIFF_FORMAT_NO_OUTPUT) &&
opt->verbose_header &&
opt->commit_format != CMIT_FMT_ONELINE) {
opt->commit_format != CMIT_FMT_ONELINE &&
!commit_format_is_empty(opt->commit_format)) {
/*
* When showing a verbose header (i.e. log message),
* and not in --pretty=oneline format, we would want

5
pretty.c
View File

@ -24,6 +24,11 @@ static size_t commit_formats_len;
static size_t commit_formats_alloc;
static struct cmt_fmt_map *find_commit_format(const char *sought);
int commit_format_is_empty(enum cmit_fmt fmt)
{
return fmt == CMIT_FMT_USERFORMAT && !*user_format;
}
static void save_user_format(struct rev_info *rev, const char *cp, int is_tformat)
{
free(user_format);