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git/log-tree.c
Junio C Hamano 80583c0ef6 Lift 16kB limit of log message output
Traditionally we had 16kB limit when formatting log messages for
output, because it was easier to arrange for the caller to have
a reasonably big buffer and pass it down without ever worrying
about reallocating.

This changes the calling convention of pretty_print_commit() to
lift this limit.  Instead of the buffer and remaining length, it
now takes a pointer to the pointer that points at the allocated
buffer, and another pointer to the location that stores the
allocated length, and reallocates the buffer as necessary.

To support the user format, the error return of interpolate()
needed to be changed.  It used to return a bool telling "Ok the
result fits", or "Sorry, I had to truncate it".  Now it returns
0 on success, and returns the size of the buffer it wants in
order to fit the whole result.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-13 00:41:21 -07:00

413 lines
10 KiB
C

#include "cache.h"
#include "diff.h"
#include "commit.h"
#include "log-tree.h"
#include "reflog-walk.h"
struct decoration name_decoration = { "object names" };
static void show_parents(struct commit *commit, int abbrev)
{
struct commit_list *p;
for (p = commit->parents; p ; p = p->next) {
struct commit *parent = p->item;
printf(" %s", diff_unique_abbrev(parent->object.sha1, abbrev));
}
}
static void show_decorations(struct commit *commit)
{
const char *prefix;
struct name_decoration *decoration;
decoration = lookup_decoration(&name_decoration, &commit->object);
if (!decoration)
return;
prefix = " (";
while (decoration) {
printf("%s%s", prefix, decoration->name);
prefix = ", ";
decoration = decoration->next;
}
putchar(')');
}
/*
* Search for "^[-A-Za-z]+: [^@]+@" pattern. It usually matches
* Signed-off-by: and Acked-by: lines.
*/
static int detect_any_signoff(char *letter, int size)
{
char ch, *cp;
int seen_colon = 0;
int seen_at = 0;
int seen_name = 0;
int seen_head = 0;
cp = letter + size;
while (letter <= --cp && (ch = *cp) == '\n')
continue;
while (letter <= cp) {
ch = *cp--;
if (ch == '\n')
break;
if (!seen_at) {
if (ch == '@')
seen_at = 1;
continue;
}
if (!seen_colon) {
if (ch == '@')
return 0;
else if (ch == ':')
seen_colon = 1;
else
seen_name = 1;
continue;
}
if (('A' <= ch && ch <= 'Z') ||
('a' <= ch && ch <= 'z') ||
ch == '-') {
seen_head = 1;
continue;
}
/* no empty last line doesn't match */
return 0;
}
return seen_head && seen_name;
}
static unsigned long append_signoff(char **buf_p, unsigned long *buf_sz_p,
unsigned long at, const char *signoff)
{
static const char signed_off_by[] = "Signed-off-by: ";
size_t signoff_len = strlen(signoff);
int has_signoff = 0;
char *cp;
char *buf;
unsigned long buf_sz;
buf = *buf_p;
buf_sz = *buf_sz_p;
if (buf_sz <= at + strlen(signed_off_by) + signoff_len + 3) {
buf_sz += strlen(signed_off_by) + signoff_len + 3;
buf = xrealloc(buf, buf_sz);
*buf_p = buf;
*buf_sz_p = buf_sz;
}
cp = buf;
/* First see if we already have the sign-off by the signer */
while ((cp = strstr(cp, signed_off_by))) {
has_signoff = 1;
cp += strlen(signed_off_by);
if (cp + signoff_len >= buf + at)
break;
if (strncmp(cp, signoff, signoff_len))
continue;
if (!isspace(cp[signoff_len]))
continue;
/* we already have him */
return at;
}
if (!has_signoff)
has_signoff = detect_any_signoff(buf, at);
if (!has_signoff)
buf[at++] = '\n';
strcpy(buf + at, signed_off_by);
at += strlen(signed_off_by);
strcpy(buf + at, signoff);
at += signoff_len;
buf[at++] = '\n';
buf[at] = 0;
return at;
}
static unsigned int digits_in_number(unsigned int number)
{
unsigned int i = 10, result = 1;
while (i <= number) {
i *= 10;
result++;
}
return result;
}
void show_log(struct rev_info *opt, const char *sep)
{
char *msgbuf = NULL;
unsigned long msgbuf_len = 0;
struct log_info *log = opt->loginfo;
struct commit *commit = log->commit, *parent = log->parent;
int abbrev = opt->diffopt.abbrev;
int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
const char *extra;
int len;
const char *subject = NULL, *extra_headers = opt->extra_headers;
opt->loginfo = NULL;
if (!opt->verbose_header) {
if (opt->left_right) {
if (commit->object.flags & BOUNDARY)
putchar('-');
else if (commit->object.flags & SYMMETRIC_LEFT)
putchar('<');
else
putchar('>');
}
fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
if (opt->parents)
show_parents(commit, abbrev_commit);
show_decorations(commit);
putchar(opt->diffopt.line_termination);
return;
}
/*
* The "oneline" format has several special cases:
* - The pretty-printed commit lacks a newline at the end
* of the buffer, but we do want to make sure that we
* have a newline there. If the separator isn't already
* a newline, add an extra one.
* - unlike other log messages, the one-line format does
* not have an empty line between entries.
*/
extra = "";
if (*sep != '\n' && opt->commit_format == CMIT_FMT_ONELINE)
extra = "\n";
if (opt->shown_one && opt->commit_format != CMIT_FMT_ONELINE)
putchar(opt->diffopt.line_termination);
opt->shown_one = 1;
/*
* Print header line of header..
*/
if (opt->commit_format == CMIT_FMT_EMAIL) {
char *sha1 = sha1_to_hex(commit->object.sha1);
if (opt->total > 0) {
static char buffer[64];
snprintf(buffer, sizeof(buffer),
"Subject: [%s %0*d/%d] ",
opt->subject_prefix,
digits_in_number(opt->total),
opt->nr, opt->total);
subject = buffer;
} else if (opt->total == 0) {
static char buffer[256];
snprintf(buffer, sizeof(buffer),
"Subject: [%s] ",
opt->subject_prefix);
subject = buffer;
} else {
subject = "Subject: ";
}
printf("From %s Mon Sep 17 00:00:00 2001\n", sha1);
if (opt->message_id)
printf("Message-Id: <%s>\n", opt->message_id);
if (opt->ref_message_id)
printf("In-Reply-To: <%s>\nReferences: <%s>\n",
opt->ref_message_id, opt->ref_message_id);
if (opt->mime_boundary) {
static char subject_buffer[1024];
static char buffer[1024];
snprintf(subject_buffer, sizeof(subject_buffer) - 1,
"%s"
"MIME-Version: 1.0\n"
"Content-Type: multipart/mixed;"
" boundary=\"%s%s\"\n"
"\n"
"This is a multi-part message in MIME "
"format.\n"
"--%s%s\n"
"Content-Type: text/plain; "
"charset=UTF-8; format=fixed\n"
"Content-Transfer-Encoding: 8bit\n\n",
extra_headers ? extra_headers : "",
mime_boundary_leader, opt->mime_boundary,
mime_boundary_leader, opt->mime_boundary);
extra_headers = subject_buffer;
snprintf(buffer, sizeof(buffer) - 1,
"--%s%s\n"
"Content-Type: text/x-patch;"
" name=\"%s.diff\"\n"
"Content-Transfer-Encoding: 8bit\n"
"Content-Disposition: %s;"
" filename=\"%s.diff\"\n\n",
mime_boundary_leader, opt->mime_boundary,
sha1,
opt->no_inline ? "attachment" : "inline",
sha1);
opt->diffopt.stat_sep = buffer;
}
} else if (opt->commit_format != CMIT_FMT_USERFORMAT) {
fputs(diff_get_color(opt->diffopt.color_diff, DIFF_COMMIT),
stdout);
if (opt->commit_format != CMIT_FMT_ONELINE)
fputs("commit ", stdout);
if (commit->object.flags & BOUNDARY)
putchar('-');
else if (opt->left_right) {
if (commit->object.flags & SYMMETRIC_LEFT)
putchar('<');
else
putchar('>');
}
fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit),
stdout);
if (opt->parents)
show_parents(commit, abbrev_commit);
if (parent)
printf(" (from %s)",
diff_unique_abbrev(parent->object.sha1,
abbrev_commit));
show_decorations(commit);
printf("%s",
diff_get_color(opt->diffopt.color_diff, DIFF_RESET));
putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
if (opt->reflog_info) {
show_reflog_message(opt->reflog_info,
opt->commit_format == CMIT_FMT_ONELINE,
opt->date_mode);
if (opt->commit_format == CMIT_FMT_ONELINE) {
printf("%s", sep);
return;
}
}
}
/*
* And then the pretty-printed message itself
*/
len = pretty_print_commit(opt->commit_format, commit, ~0u,
&msgbuf, &msgbuf_len, abbrev, subject,
extra_headers, opt->date_mode);
if (opt->add_signoff)
len = append_signoff(&msgbuf, &msgbuf_len, len,
opt->add_signoff);
printf("%s%s%s", msgbuf, extra, sep);
free(msgbuf);
}
int log_tree_diff_flush(struct rev_info *opt)
{
diffcore_std(&opt->diffopt);
if (diff_queue_is_empty()) {
int saved_fmt = opt->diffopt.output_format;
opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
diff_flush(&opt->diffopt);
opt->diffopt.output_format = saved_fmt;
return 0;
}
if (opt->loginfo && !opt->no_commit_id) {
/* When showing a verbose header (i.e. log message),
* and not in --pretty=oneline format, we would want
* an extra newline between the end of log and the
* output for readability.
*/
show_log(opt, opt->diffopt.msg_sep);
if (opt->verbose_header &&
opt->commit_format != CMIT_FMT_ONELINE) {
int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
if ((pch & opt->diffopt.output_format) == pch)
printf("---");
putchar('\n');
}
}
diff_flush(&opt->diffopt);
return 1;
}
static int do_diff_combined(struct rev_info *opt, struct commit *commit)
{
unsigned const char *sha1 = commit->object.sha1;
diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
return !opt->loginfo;
}
/*
* Show the diff of a commit.
*
* Return true if we printed any log info messages
*/
static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
{
int showed_log;
struct commit_list *parents;
unsigned const char *sha1 = commit->object.sha1;
if (!opt->diff)
return 0;
/* Root commit? */
parents = commit->parents;
if (!parents) {
if (opt->show_root_diff) {
diff_root_tree_sha1(sha1, "", &opt->diffopt);
log_tree_diff_flush(opt);
}
return !opt->loginfo;
}
/* More than one parent? */
if (parents && parents->next) {
if (opt->ignore_merges)
return 0;
else if (opt->combine_merges)
return do_diff_combined(opt, commit);
/* If we show individual diffs, show the parent info */
log->parent = parents->item;
}
showed_log = 0;
for (;;) {
struct commit *parent = parents->item;
diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
log_tree_diff_flush(opt);
showed_log |= !opt->loginfo;
/* Set up the log info for the next parent, if any.. */
parents = parents->next;
if (!parents)
break;
log->parent = parents->item;
opt->loginfo = log;
}
return showed_log;
}
int log_tree_commit(struct rev_info *opt, struct commit *commit)
{
struct log_info log;
int shown;
log.commit = commit;
log.parent = NULL;
opt->loginfo = &log;
shown = log_tree_diff(opt, commit, &log);
if (!shown && opt->loginfo && opt->always_show_header) {
log.parent = NULL;
show_log(opt, "");
shown = 1;
}
opt->loginfo = NULL;
return shown;
}