diff options
Diffstat (limited to 'reflog-walk.c')
| -rw-r--r-- | reflog-walk.c | 317 |
1 files changed, 317 insertions, 0 deletions
diff --git a/reflog-walk.c b/reflog-walk.c new file mode 100644 index 0000000000..da71a85851 --- /dev/null +++ b/reflog-walk.c @@ -0,0 +1,317 @@ +#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; + + if (array->nr >= array->alloc) { + array->alloc = alloc_nr(array->nr + 1); + array->items = xrealloc(array->items, array->alloc * + sizeof(struct reflog_info)); + } + item = array->items + array->nr; + memcpy(item->osha1, osha1, 20); + memcpy(item->nsha1, nsha1, 20); + 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(sizeof(struct complete_reflogs), 1); + reflogs->ref = xstrdup(ref); + for_each_reflog_ent(ref, read_one_reflog, reflogs); + if (reflogs->nr == 0) { + unsigned char sha1[20]; + const char *name = resolve_ref(ref, sha1, 1, NULL); + if (name) { + name = xstrdup(name); + for_each_reflog_ent(name, read_one_reflog, reflogs); + free((char *)name); + } + } + 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; + if (lifo->nr >= lifo->alloc) { + lifo->alloc = alloc_nr(lifo->nr + 1); + lifo->items = xrealloc(lifo->items, + lifo->alloc * sizeof(struct commit_info)); + } + info = lifo->items + lifo->nr; + info->commit = commit; + info->util = util; + lifo->nr++; +} + +struct commit_reflog { + int flag, recno; + 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(sizeof(struct reflog_walk_info), 1); +} + +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; + + 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); + } + } else + recno = 0; + + item = string_list_lookup(&info->complete_reflogs, branch); + if (item) + reflogs = item->util; + else { + if (*branch == '\0') { + unsigned char sha1[20]; + const char *head = resolve_ref("HEAD", sha1, 0, NULL); + if (!head) + die ("No current branch"); + free(branch); + branch = xstrdup(head); + } + 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(sizeof(struct commit_reflog), 1); + if (recno < 0) { + commit_reflog->flag = 1; + 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->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(sizeof(struct commit_list), 1); + commit->parents->item = commit_info->commit; +} + +void get_reflog_selector(struct strbuf *sb, + struct reflog_walk_info *reflog_info, + enum date_mode dmode, + 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->flag || dmode) { + 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); +} + +void show_reflog_message(struct reflog_walk_info *reflog_info, int oneline, + enum date_mode dmode) +{ + 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, 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); + } +} |