diff options
Diffstat (limited to 'reflog-walk.c')
| -rw-r--r-- | reflog-walk.c | 369 |
1 files changed, 369 insertions, 0 deletions
diff --git a/reflog-walk.c b/reflog-walk.c new file mode 100644 index 0000000..8a4d8fa --- /dev/null +++ b/reflog-walk.c @@ -0,0 +1,369 @@ +#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; + char *short_ref; + struct reflog_info { + struct object_id ooid, noid; + char *email; + timestamp_t timestamp; + int tz; + char *message; + } *items; + int nr, alloc; +}; + +static int read_one_reflog(struct object_id *ooid, struct object_id *noid, + const char *email, timestamp_t 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; + oidcpy(&item->ooid, ooid); + oidcpy(&item->noid, noid); + item->email = xstrdup(email); + item->timestamp = timestamp; + item->tz = tz; + item->message = xstrdup(message); + array->nr++; + return 0; +} + +static void free_complete_reflog(struct complete_reflogs *array) +{ + int i; + + if (!array) + return; + + for (i = 0; i < array->nr; i++) { + free(array->items[i].email); + free(array->items[i].message); + } + free(array->items); + free(array->ref); + free(array->short_ref); + free(array); +} + +static void complete_reflogs_clear(void *util, const char *str UNUSED) +{ + struct complete_reflogs *array = util; + free_complete_reflog(array); +} + +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) { + const char *name; + void *name_to_free; + name = name_to_free = resolve_refdup(ref, RESOLVE_REF_READING, + NULL, NULL); + if (name) { + for_each_reflog_ent(name, read_one_reflog, reflogs); + free(name_to_free); + } + } + if (reflogs->nr == 0) { + char *refname = xstrfmt("refs/%s", ref); + for_each_reflog_ent(refname, read_one_reflog, reflogs); + if (reflogs->nr == 0) { + free(refname); + refname = xstrfmt("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, + timestamp_t timestamp) +{ + int i; + for (i = array->nr - 1; i >= 0; i--) + if (timestamp >= array->items[i].timestamp) + return i; + return -1; +} + +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_reflog **logs; + size_t nr, alloc; + struct string_list complete_reflogs; + struct commit_reflog *last_commit_reflog; +}; + +void init_reflog_walk(struct reflog_walk_info **info) +{ + CALLOC_ARRAY(*info, 1); + (*info)->complete_reflogs.strdup_strings = 1; +} + +void reflog_walk_info_release(struct reflog_walk_info *info) +{ + size_t i; + + if (!info) + return; + + for (i = 0; i < info->nr; i++) + free(info->logs[i]); + string_list_clear_func(&info->complete_reflogs, + complete_reflogs_clear); + free(info->logs); + free(info); +} + +int add_reflog_for_walk(struct reflog_walk_info *info, + struct commit *commit, const char *name) +{ + timestamp_t 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') { + free(branch); + branch = resolve_refdup("HEAD", 0, NULL, NULL); + if (!branch) + die("no current branch"); + + } + reflogs = read_complete_reflog(branch); + if (!reflogs || reflogs->nr == 0) { + char *b; + int ret = dwim_log(branch, strlen(branch), + NULL, &b); + if (ret > 1) + free(b); + else if (ret == 1) { + free_complete_reflog(reflogs); + free(branch); + branch = b; + reflogs = read_complete_reflog(branch); + } + } + if (!reflogs || reflogs->nr == 0) { + free_complete_reflog(reflogs); + free(branch); + return -1; + } + string_list_insert(&info->complete_reflogs, branch)->util + = reflogs; + } + free(branch); + + CALLOC_ARRAY(commit_reflog, 1); + if (recno < 0) { + commit_reflog->recno = get_reflog_recno_by_time(reflogs, timestamp); + if (commit_reflog->recno < 0) { + free(commit_reflog); + return -1; + } + } else + commit_reflog->recno = reflogs->nr - recno - 1; + commit_reflog->selector = selector; + commit_reflog->reflogs = reflogs; + + ALLOC_GROW(info->logs, info->nr + 1, info->alloc); + info->logs[info->nr++] = commit_reflog; + + return 0; +} + +void get_reflog_selector(struct strbuf *sb, + struct reflog_walk_info *reflog_info, + const struct 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; +} + +timestamp_t get_reflog_timestamp(struct reflog_walk_info *reflog_info) +{ + struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog; + struct reflog_info *info; + + if (!commit_reflog) + return 0; + + info = &commit_reflog->reflogs->items[commit_reflog->recno+1]; + return info->timestamp; +} + +void show_reflog_message(struct reflog_walk_info *reflog_info, int oneline, + const struct 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); + } +} + +int reflog_walk_empty(struct reflog_walk_info *info) +{ + return !info || !info->nr; +} + +static struct commit *next_reflog_commit(struct commit_reflog *log) +{ + for (; log->recno >= 0; log->recno--) { + struct reflog_info *entry = &log->reflogs->items[log->recno]; + struct object *obj = parse_object(the_repository, + &entry->noid); + + if (obj && obj->type == OBJ_COMMIT) + return (struct commit *)obj; + } + return NULL; +} + +static timestamp_t log_timestamp(struct commit_reflog *log) +{ + return log->reflogs->items[log->recno].timestamp; +} + +struct commit *next_reflog_entry(struct reflog_walk_info *walk) +{ + struct commit_reflog *best = NULL; + struct commit *best_commit = NULL; + size_t i; + + for (i = 0; i < walk->nr; i++) { + struct commit_reflog *log = walk->logs[i]; + struct commit *commit = next_reflog_commit(log); + + if (!commit) + continue; + + if (!best || log_timestamp(log) > log_timestamp(best)) { + best = log; + best_commit = commit; + } + } + + if (best) { + best->recno--; + walk->last_commit_reflog = best; + return best_commit; + } + + return NULL; +} |