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tag: v1.7.0-rc1
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#include "cache.h"
#include "diff.h"
#include "commit.h"
#include "tag.h"
#include "graph.h"
#include "log-tree.h"
#include "reflog-walk.h"
#include "refs.h"
#include "string-list.h"

struct decoration name_decoration = { "object names" };

static void add_name_decoration(const char *prefix, const char *name, struct object *obj)
{
int plen = strlen(prefix);
int nlen = strlen(name);
struct name_decoration *res = xmalloc(sizeof(struct name_decoration) + plen + nlen);
memcpy(res->name, prefix, plen);
memcpy(res->name + plen, name, nlen + 1);
res->next = add_decoration(&name_decoration, obj, res);
}

static int add_ref_decoration(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
{
struct object *obj = parse_object(sha1);
if (!obj)
return 0;
if (!cb_data || *(int *)cb_data == DECORATE_SHORT_REFS)
refname = prettify_refname(refname);
add_name_decoration("", refname, obj);
while (obj->type == OBJ_TAG) {
obj = ((struct tag *)obj)->tagged;
if (!obj)
break;
add_name_decoration("tag: ", refname, obj);
}
return 0;
}

void load_ref_decorations(int flags)
{
static int loaded;
if (!loaded) {
loaded = 1;
for_each_ref(add_ref_decoration, &flags);
head_ref(add_ref_decoration, &flags);
}
}

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", find_unique_abbrev(parent->object.sha1, abbrev));
}
}

void show_decorations(struct rev_info *opt, struct commit *commit)
{
const char *prefix;
struct name_decoration *decoration;

if (opt->show_source && commit->util)
printf("\t%s", (char *) commit->util);
if (!opt->show_decorations)
return;
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 *cp;
int seen_colon = 0;
int seen_at = 0;
int seen_name = 0;
int seen_head = 0;

cp = letter + size;
while (letter <= --cp && *cp == '\n')
continue;

while (letter <= cp) {
char 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 void append_signoff(struct strbuf *sb, const char *signoff)
{
static const char signed_off_by[] = "Signed-off-by: ";
size_t signoff_len = strlen(signoff);
int has_signoff = 0;
char *cp;

cp = sb->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 >= sb->buf + sb->len)
break;
if (strncmp(cp, signoff, signoff_len))
continue;
if (!isspace(cp[signoff_len]))
continue;
/* we already have him */
return;
}

if (!has_signoff)
has_signoff = detect_any_signoff(sb->buf, sb->len);

if (!has_signoff)
strbuf_addch(sb, '\n');

strbuf_addstr(sb, signed_off_by);
strbuf_add(sb, signoff, signoff_len);
strbuf_addch(sb, '\n');
}

static unsigned int digits_in_number(unsigned int number)
{
unsigned int i = 10, result = 1;
while (i <= number) {
i *= 10;
result++;
}
return result;
}

void get_patch_filename(struct commit *commit, int nr, const char *suffix,
struct strbuf *buf)
{
int suffix_len = strlen(suffix) + 1;
int start_len = buf->len;

strbuf_addf(buf, commit ? "%04d-" : "%d", nr);
if (commit) {
int max_len = start_len + FORMAT_PATCH_NAME_MAX - suffix_len;
struct pretty_print_context ctx = {0};
ctx.date_mode = DATE_NORMAL;

format_commit_message(commit, "%f", buf, &ctx);
if (max_len < buf->len)
strbuf_setlen(buf, max_len);
strbuf_addstr(buf, suffix);
}
}

void log_write_email_headers(struct rev_info *opt, struct commit *commit,
const char **subject_p,
const char **extra_headers_p,
int *need_8bit_cte_p)
{
const char *subject = NULL;
const char *extra_headers = opt->extra_headers;
const char *name = sha1_to_hex(commit->object.sha1);

*need_8bit_cte_p = 0; /* unknown */
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 && opt->subject_prefix && *opt->subject_prefix) {
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", name);
graph_show_oneline(opt->graph);
if (opt->message_id) {
printf("Message-Id: <%s>\n", opt->message_id);
graph_show_oneline(opt->graph);
}
if (opt->ref_message_ids && opt->ref_message_ids->nr > 0) {
int i, n;
n = opt->ref_message_ids->nr;
printf("In-Reply-To: <%s>\n", opt->ref_message_ids->items[n-1].string);
for (i = 0; i < n; i++)
printf("%s<%s>\n", (i > 0 ? "\t" : "References: "),
opt->ref_message_ids->items[i].string);
graph_show_oneline(opt->graph);
}
if (opt->mime_boundary) {
static char subject_buffer[1024];
static char buffer[1024];
struct strbuf filename = STRBUF_INIT;
*need_8bit_cte_p = -1; /* NEVER */
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;

get_patch_filename(opt->numbered_files ? NULL : commit, opt->nr,
opt->patch_suffix, &filename);
snprintf(buffer, sizeof(buffer) - 1,
"\n--%s%s\n"
"Content-Type: text/x-patch;"
" name=\"%s\"\n"
"Content-Transfer-Encoding: 8bit\n"
"Content-Disposition: %s;"
" filename=\"%s\"\n\n",
mime_boundary_leader, opt->mime_boundary,
filename.buf,
opt->no_inline ? "attachment" : "inline",
filename.buf);
opt->diffopt.stat_sep = buffer;
strbuf_release(&filename);
}
*subject_p = subject;
*extra_headers_p = extra_headers;
}

void show_log(struct rev_info *opt)
{
struct strbuf msgbuf = STRBUF_INIT;
struct log_info *log = opt->loginfo;
struct commit *commit = log->commit, *parent = log->parent;
int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
const char *extra_headers = opt->extra_headers;
struct pretty_print_context ctx = {0};

opt->loginfo = NULL;
ctx.show_notes = opt->show_notes;
if (!opt->verbose_header) {
graph_show_commit(opt->graph);

if (!opt->graph) {
if (commit->object.flags & BOUNDARY)
putchar('-');
else if (commit->object.flags & UNINTERESTING)
putchar('^');
else if (opt->left_right) {
if (commit->object.flags & SYMMETRIC_LEFT)
putchar('<');
else
putchar('>');
}
}
fputs(find_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
if (opt->print_parents)
show_parents(commit, abbrev_commit);
show_decorations(opt, commit);
if (opt->graph && !graph_is_commit_finished(opt->graph)) {
putchar('\n');
graph_show_remainder(opt->graph);
}
putchar(opt->diffopt.line_termination);
return;
}

/*
* If use_terminator is set, we already handled any record termination
* at the end of the last record.
* Otherwise, add a diffopt.line_termination character before all
* entries but the first. (IOW, as a separator between entries)
*/
if (opt->shown_one && !opt->use_terminator) {
/*
* If entries are separated by a newline, the output
* should look human-readable. If the last entry ended
* with a newline, print the graph output before this
* newline. Otherwise it will end up as a completely blank
* line and will look like a gap in the graph.
*
* If the entry separator is not a newline, the output is
* primarily intended for programmatic consumption, and we
* never want the extra graph output before the entry
* separator.
*/
if (opt->diffopt.line_termination == '\n' &&
!opt->missing_newline)
graph_show_padding(opt->graph);
putchar(opt->diffopt.line_termination);
}
opt->shown_one = 1;

/*
* If the history graph was requested,
* print the graph, up to this commit's line
*/
graph_show_commit(opt->graph);

/*
* Print header line of header..
*/

if (opt->commit_format == CMIT_FMT_EMAIL) {
log_write_email_headers(opt, commit, &ctx.subject, &extra_headers,
&ctx.need_8bit_cte);
} else if (opt->commit_format != CMIT_FMT_USERFORMAT) {
fputs(diff_get_color_opt(&opt->diffopt, DIFF_COMMIT), stdout);
if (opt->commit_format != CMIT_FMT_ONELINE)
fputs("commit ", stdout);

if (!opt->graph) {
if (commit->object.flags & BOUNDARY)
putchar('-');
else if (commit->object.flags & UNINTERESTING)
putchar('^');
else if (opt->left_right) {
if (commit->object.flags & SYMMETRIC_LEFT)
putchar('<');
else
putchar('>');
}
}
fputs(find_unique_abbrev(commit->object.sha1, abbrev_commit),
stdout);
if (opt->print_parents)
show_parents(commit, abbrev_commit);
if (parent)
printf(" (from %s)",
find_unique_abbrev(parent->object.sha1,
abbrev_commit));
show_decorations(opt, commit);
printf("%s", diff_get_color_opt(&opt->diffopt, DIFF_RESET));
if (opt->commit_format == CMIT_FMT_ONELINE) {
putchar(' ');
} else {
putchar('\n');
graph_show_oneline(opt->graph);
}
if (opt->reflog_info) {
/*
* setup_revisions() ensures that opt->reflog_info
* and opt->graph cannot both be set,
* so we don't need to worry about printing the
* graph info here.
*/
show_reflog_message(opt->reflog_info,
opt->commit_format == CMIT_FMT_ONELINE,
opt->date_mode_explicit ?
opt->date_mode :
DATE_NORMAL);
if (opt->commit_format == CMIT_FMT_ONELINE)
return;
}
}

if (!commit->buffer)
return;

/*
* And then the pretty-printed message itself
*/
if (ctx.need_8bit_cte >= 0)
ctx.need_8bit_cte = has_non_ascii(opt->add_signoff);
ctx.date_mode = opt->date_mode;
ctx.abbrev = opt->diffopt.abbrev;
ctx.after_subject = extra_headers;
ctx.reflog_info = opt->reflog_info;
pretty_print_commit(opt->commit_format, commit, &msgbuf, &ctx);

if (opt->add_signoff)
append_signoff(&msgbuf, opt->add_signoff);
if (opt->show_log_size) {
printf("log size %i\n", (int)msgbuf.len);
graph_show_oneline(opt->graph);
}

/*
* Set opt->missing_newline if msgbuf doesn't
* end in a newline (including if it is empty)
*/
if (!msgbuf.len || msgbuf.buf[msgbuf.len - 1] != '\n')
opt->missing_newline = 1;
else
opt->missing_newline = 0;

if (opt->graph)
graph_show_commit_msg(opt->graph, &msgbuf);
else
fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout);
if (opt->use_terminator) {
if (!opt->missing_newline)
graph_show_padding(opt->graph);
putchar('\n');
}

strbuf_release(&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);
if ((opt->diffopt.output_format & ~DIFF_FORMAT_NO_OUTPUT) &&
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 && !DIFF_OPT_TST(&opt->diffopt, EXIT_WITH_STATUS))
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;
maybe_flush_or_die(stdout, "stdout");
return shown;
}
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