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#include "cache.h"
#include "commit.h"
#include "refs.h"
#include "diff.h"
#include "revision.h"
#include "string-list.h"
#include "reflog-walk.h"
struct complete_reflogs {
char *ref;
const char *short_ref;
struct reflog_info {
unsigned char osha1[20], nsha1[20];
char *email;
unsigned long timestamp;
int tz;
char *message;
} *items;
int nr, alloc;
};
static int read_one_reflog(unsigned char *osha1, unsigned char *nsha1,
const char *email, unsigned long timestamp, int tz,
const char *message, void *cb_data)
{
struct complete_reflogs *array = cb_data;
struct reflog_info *item;
ALLOC_GROW(array->items, array->nr + 1, array->alloc);
item = array->items + array->nr;
hashcpy(item->osha1, osha1);
hashcpy(item->nsha1, nsha1);
item->email = xstrdup(email);
item->timestamp = timestamp;
item->tz = tz;
item->message = xstrdup(message);
array->nr++;
return 0;
}
static struct complete_reflogs *read_complete_reflog(const char *ref)
{
struct complete_reflogs *reflogs =
xcalloc(1, sizeof(struct complete_reflogs));
reflogs->ref = xstrdup(ref);
for_each_reflog_ent(ref, read_one_reflog, reflogs);
if (reflogs->nr == 0) {
unsigned char sha1[20];
const char *name;
void *name_to_free;
name = name_to_free = resolve_refdup(ref, RESOLVE_REF_READING,
sha1, NULL);
if (name) {
for_each_reflog_ent(name, read_one_reflog, reflogs);
free(name_to_free);
}
}
if (reflogs->nr == 0) {
int len = strlen(ref);
char *refname = xmalloc(len + 12);
sprintf(refname, "refs/%s", ref);
for_each_reflog_ent(refname, read_one_reflog, reflogs);
if (reflogs->nr == 0) {
sprintf(refname, "refs/heads/%s", ref);
for_each_reflog_ent(refname, read_one_reflog, reflogs);
}
free(refname);
}
return reflogs;
}
static int get_reflog_recno_by_time(struct complete_reflogs *array,
unsigned long timestamp)
{
int i;
for (i = array->nr - 1; i >= 0; i--)
if (timestamp >= array->items[i].timestamp)
return i;
return -1;
}
struct commit_info_lifo {
struct commit_info {
struct commit *commit;
void *util;
} *items;
int nr, alloc;
};
static struct commit_info *get_commit_info(struct commit *commit,
struct commit_info_lifo *lifo, int pop)
{
int i;
for (i = 0; i < lifo->nr; i++)
if (lifo->items[i].commit == commit) {
struct commit_info *result = &lifo->items[i];
if (pop) {
if (i + 1 < lifo->nr)
memmove(lifo->items + i,
lifo->items + i + 1,
(lifo->nr - i) *
sizeof(struct commit_info));
lifo->nr--;
}
return result;
}
return NULL;
}
static void add_commit_info(struct commit *commit, void *util,
struct commit_info_lifo *lifo)
{
struct commit_info *info;
ALLOC_GROW(lifo->items, lifo->nr + 1, lifo->alloc);
info = lifo->items + lifo->nr;
info->commit = commit;
info->util = util;
lifo->nr++;
}
struct commit_reflog {
int recno;
enum selector_type {
SELECTOR_NONE,
SELECTOR_INDEX,
SELECTOR_DATE
} selector;
struct complete_reflogs *reflogs;
};
struct reflog_walk_info {
struct commit_info_lifo reflogs;
struct string_list complete_reflogs;
struct commit_reflog *last_commit_reflog;
};
void init_reflog_walk(struct reflog_walk_info **info)
{
*info = xcalloc(1, sizeof(struct reflog_walk_info));
}
int add_reflog_for_walk(struct reflog_walk_info *info,
struct commit *commit, const char *name)
{
unsigned long timestamp = 0;
int recno = -1;
struct string_list_item *item;
struct complete_reflogs *reflogs;
char *branch, *at = strchr(name, '@');
struct commit_reflog *commit_reflog;
enum selector_type selector = SELECTOR_NONE;
if (commit->object.flags & UNINTERESTING)
die ("Cannot walk reflogs for %s", name);
branch = xstrdup(name);
if (at && at[1] == '{') {
char *ep;
branch[at - name] = '\0';
recno = strtoul(at + 2, &ep, 10);
if (*ep != '}') {
recno = -1;
timestamp = approxidate(at + 2);
selector = SELECTOR_DATE;
}
else
selector = SELECTOR_INDEX;
} else
recno = 0;
item = string_list_lookup(&info->complete_reflogs, branch);
if (item)
reflogs = item->util;
else {
if (*branch == '\0') {
unsigned char sha1[20];
free(branch);
branch = resolve_refdup("HEAD", 0, sha1, NULL);
if (!branch)
die ("No current branch");
}
reflogs = read_complete_reflog(branch);
if (!reflogs || reflogs->nr == 0) {
unsigned char sha1[20];
char *b;
if (dwim_log(branch, strlen(branch), sha1, &b) == 1) {
if (reflogs) {
free(reflogs->ref);
free(reflogs);
}
free(branch);
branch = b;
reflogs = read_complete_reflog(branch);
}
}
if (!reflogs || reflogs->nr == 0)
return -1;
string_list_insert(&info->complete_reflogs, branch)->util
= reflogs;
}
commit_reflog = xcalloc(1, sizeof(struct commit_reflog));
if (recno < 0) {
commit_reflog->recno = get_reflog_recno_by_time(reflogs, timestamp);
if (commit_reflog->recno < 0) {
free(branch);
free(commit_reflog);
return -1;
}
} else
commit_reflog->recno = reflogs->nr - recno - 1;
commit_reflog->selector = selector;
commit_reflog->reflogs = reflogs;
add_commit_info(commit, commit_reflog, &info->reflogs);
return 0;
}
void fake_reflog_parent(struct reflog_walk_info *info, struct commit *commit)
{
struct commit_info *commit_info =
get_commit_info(commit, &info->reflogs, 0);
struct commit_reflog *commit_reflog;
struct reflog_info *reflog;
info->last_commit_reflog = NULL;
if (!commit_info)
return;
commit_reflog = commit_info->util;
if (commit_reflog->recno < 0) {
commit->parents = NULL;
return;
}
reflog = &commit_reflog->reflogs->items[commit_reflog->recno];
info->last_commit_reflog = commit_reflog;
commit_reflog->recno--;
commit_info->commit = (struct commit *)parse_object(reflog->osha1);
if (!commit_info->commit) {
commit->parents = NULL;
return;
}
commit->parents = xcalloc(1, sizeof(struct commit_list));
commit->parents->item = commit_info->commit;
}
void get_reflog_selector(struct strbuf *sb,
struct reflog_walk_info *reflog_info,
enum date_mode dmode, int force_date,
int shorten)
{
struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
struct reflog_info *info;
const char *printed_ref;
if (!commit_reflog)
return;
if (shorten) {
if (!commit_reflog->reflogs->short_ref)
commit_reflog->reflogs->short_ref
= shorten_unambiguous_ref(commit_reflog->reflogs->ref, 0);
printed_ref = commit_reflog->reflogs->short_ref;
} else {
printed_ref = commit_reflog->reflogs->ref;
}
strbuf_addf(sb, "%s@{", printed_ref);
if (commit_reflog->selector == SELECTOR_DATE ||
(commit_reflog->selector == SELECTOR_NONE && force_date)) {
info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
strbuf_addstr(sb, show_date(info->timestamp, info->tz, dmode));
} else {
strbuf_addf(sb, "%d", commit_reflog->reflogs->nr
- 2 - commit_reflog->recno);
}
strbuf_addch(sb, '}');
}
void get_reflog_message(struct strbuf *sb,
struct reflog_walk_info *reflog_info)
{
struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
struct reflog_info *info;
size_t len;
if (!commit_reflog)
return;
info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
len = strlen(info->message);
if (len > 0)
len--; /* strip away trailing newline */
strbuf_add(sb, info->message, len);
}
const char *get_reflog_ident(struct reflog_walk_info *reflog_info)
{
struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
struct reflog_info *info;
if (!commit_reflog)
return NULL;
info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
return info->email;
}
void show_reflog_message(struct reflog_walk_info *reflog_info, int oneline,
enum date_mode dmode, int force_date)
{
if (reflog_info && reflog_info->last_commit_reflog) {
struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
struct reflog_info *info;
struct strbuf selector = STRBUF_INIT;
info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
get_reflog_selector(&selector, reflog_info, dmode, force_date, 0);
if (oneline) {
printf("%s: %s", selector.buf, info->message);
}
else {
printf("Reflog: %s (%s)\nReflog message: %s",
selector.buf, info->email, info->message);
}
strbuf_release(&selector);
}
}
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