From: Junio C Hamano Date: Wed, 13 Mar 2013 16:29:23 +0000 (-0700) Subject: Merge branch 'jc/reflog-reverse-walk' into nd/branch-show-rebase-bisect-state X-Git-Tag: v2.3.1~8^2~2 X-Git-Url: https://git.lorimer.id.au/gitweb.git/diff_plain/cdd76db373c23bbd637c76a605b3e7f571500103?ds=inline;hp=-c Merge branch 'jc/reflog-reverse-walk' into nd/branch-show-rebase-bisect-state * jc/reflog-reverse-walk: reflog: add for_each_reflog_ent_reverse() API for_each_recent_reflog_ent(): simplify opening of a reflog file for_each_reflog_ent(): extract a helper to process a single entry --- cdd76db373c23bbd637c76a605b3e7f571500103 diff --combined refs.c index 2962825308,8e24060d80..69da0d57cf --- a/refs.c +++ b/refs.c @@@ -333,12 -333,14 +333,12 @@@ struct string_slice static int ref_entry_cmp_sslice(const void *key_, const void *ent_) { - struct string_slice *key = (struct string_slice *)key_; - struct ref_entry *ent = *(struct ref_entry **)ent_; - int entlen = strlen(ent->name); - int cmplen = key->len < entlen ? key->len : entlen; - int cmp = memcmp(key->str, ent->name, cmplen); + const struct string_slice *key = key_; + const struct ref_entry *ent = *(const struct ref_entry * const *)ent_; + int cmp = strncmp(key->str, ent->name, key->len); if (cmp) return cmp; - return key->len - entlen; + return '\0' - (unsigned char)ent->name[key->len]; } /* @@@ -1200,8 -1202,6 +1200,8 @@@ int peel_ref(const char *refname, unsig if (current_ref && (current_ref->name == refname || !strcmp(current_ref->name, refname))) { if (current_ref->flag & REF_KNOWS_PEELED) { + if (is_null_sha1(current_ref->u.value.peeled)) + return -1; hashcpy(sha1, current_ref->u.value.peeled); return 0; } @@@ -1223,16 -1223,9 +1223,16 @@@ } fallback: - o = parse_object(base); - if (o && o->type == OBJ_TAG) { - o = deref_tag(o, refname, 0); + o = lookup_unknown_object(base); + if (o->type == OBJ_NONE) { + int type = sha1_object_info(base, NULL); + if (type < 0) + return -1; + o->type = type; + } + + if (o->type == OBJ_TAG) { + o = deref_tag_noverify(o); if (o) { hashcpy(sha1, o->sha1); return 0; @@@ -1742,8 -1735,7 +1742,8 @@@ static struct lock_file packlock static int repack_without_ref(const char *refname) { struct repack_without_ref_sb data; - struct ref_dir *packed = get_packed_refs(get_ref_cache(NULL)); + struct ref_cache *refs = get_ref_cache(NULL); + struct ref_dir *packed = get_packed_refs(refs); if (find_ref(packed, refname) == NULL) return 0; data.refname = refname; @@@ -1752,8 -1744,6 +1752,8 @@@ unable_to_lock_error(git_path("packed-refs"), errno); return error("cannot delete '%s' from packed refs", refname); } + clear_packed_ref_cache(refs); + packed = get_packed_refs(refs); do_for_each_ref_in_dir(packed, 0, "", repack_without_ref_fn, 0, 0, &data); return commit_lock_file(&packlock); } @@@ -1763,24 -1753,32 +1763,24 @@@ int delete_ref(const char *refname, con struct ref_lock *lock; int err, i = 0, ret = 0, flag = 0; - lock = lock_ref_sha1_basic(refname, sha1, 0, &flag); + lock = lock_ref_sha1_basic(refname, sha1, delopt, &flag); if (!lock) return 1; if (!(flag & REF_ISPACKED) || flag & REF_ISSYMREF) { /* loose */ - const char *path; - - if (!(delopt & REF_NODEREF)) { - i = strlen(lock->lk->filename) - 5; /* .lock */ - lock->lk->filename[i] = 0; - path = lock->lk->filename; - } else { - path = git_path("%s", refname); - } - err = unlink_or_warn(path); + i = strlen(lock->lk->filename) - 5; /* .lock */ + lock->lk->filename[i] = 0; + err = unlink_or_warn(lock->lk->filename); if (err && errno != ENOENT) ret = 1; - if (!(delopt & REF_NODEREF)) - lock->lk->filename[i] = '.'; + lock->lk->filename[i] = '.'; } /* removing the loose one could have resurrected an earlier * packed one. Also, if it was not loose we need to repack * without it. */ - ret |= repack_without_ref(refname); + ret |= repack_without_ref(lock->ref_name); unlink_or_warn(git_path("logs/%s", lock->ref_name)); invalidate_ref_cache(NULL); @@@ -2292,59 -2290,117 +2292,117 @@@ int read_ref_at(const char *refname, un return 1; } - int for_each_recent_reflog_ent(const char *refname, each_reflog_ent_fn fn, long ofs, void *cb_data) + static int show_one_reflog_ent(struct strbuf *sb, each_reflog_ent_fn fn, void *cb_data) + { + unsigned char osha1[20], nsha1[20]; + char *email_end, *message; + unsigned long timestamp; + int tz; + + /* old SP new SP name SP time TAB msg LF */ + if (sb->len < 83 || sb->buf[sb->len - 1] != '\n' || + get_sha1_hex(sb->buf, osha1) || sb->buf[40] != ' ' || + get_sha1_hex(sb->buf + 41, nsha1) || sb->buf[81] != ' ' || + !(email_end = strchr(sb->buf + 82, '>')) || + email_end[1] != ' ' || + !(timestamp = strtoul(email_end + 2, &message, 10)) || + !message || message[0] != ' ' || + (message[1] != '+' && message[1] != '-') || + !isdigit(message[2]) || !isdigit(message[3]) || + !isdigit(message[4]) || !isdigit(message[5])) + return 0; /* corrupt? */ + email_end[1] = '\0'; + tz = strtol(message + 1, NULL, 10); + if (message[6] != '\t') + message += 6; + else + message += 7; + return fn(osha1, nsha1, sb->buf + 82, timestamp, tz, message, cb_data); + } + + static char *find_beginning_of_line(char *bob, char *scan) + { + while (bob < scan && *(--scan) != '\n') + ; /* keep scanning backwards */ + /* + * Return either beginning of the buffer, or LF at the end of + * the previous line. + */ + return scan; + } + + int for_each_reflog_ent_reverse(const char *refname, each_reflog_ent_fn fn, void *cb_data) { - const char *logfile; - FILE *logfp; struct strbuf sb = STRBUF_INIT; - int ret = 0; + FILE *logfp; + long pos; + int ret = 0, at_tail = 1; - logfile = git_path("logs/%s", refname); - logfp = fopen(logfile, "r"); + logfp = fopen(git_path("logs/%s", refname), "r"); if (!logfp) return -1; - if (ofs) { - struct stat statbuf; - if (fstat(fileno(logfp), &statbuf) || - statbuf.st_size < ofs || - fseek(logfp, -ofs, SEEK_END) || - strbuf_getwholeline(&sb, logfp, '\n')) { - fclose(logfp); - strbuf_release(&sb); - return -1; + /* Jump to the end */ + if (fseek(logfp, 0, SEEK_END) < 0) + return error("cannot seek back reflog for %s: %s", + refname, strerror(errno)); + pos = ftell(logfp); + while (!ret && 0 < pos) { + int cnt; + size_t nread; + char buf[BUFSIZ]; + char *endp, *scanp; + + /* Fill next block from the end */ + cnt = (sizeof(buf) < pos) ? sizeof(buf) : pos; + if (fseek(logfp, pos - cnt, SEEK_SET)) + return error("cannot seek back reflog for %s: %s", + refname, strerror(errno)); + nread = fread(buf, cnt, 1, logfp); + if (nread < 0) + return error("cannot read %d bytes from reflog for %s: %s", + cnt, refname, strerror(errno)); + pos -= cnt; + + scanp = endp = buf + cnt; + if (at_tail && scanp[-1] == '\n') + /* Looking at the final LF at the end of the file */ + scanp--; + at_tail = 0; + + while (buf < scanp) { + /* + * terminating LF of the previous line, or the beginning + * of the buffer. + */ + char *bp; + + bp = find_beginning_of_line(buf, scanp); + + if (*bp != '\n') { + strbuf_splice(&sb, 0, 0, buf, endp - buf); + if (pos) + break; /* need to fill another block */ + scanp = buf - 1; /* leave loop */ + } else { + /* + * (bp + 1) thru endp is the beginning of the + * current line we have in sb + */ + strbuf_splice(&sb, 0, 0, bp + 1, endp - (bp + 1)); + scanp = bp; + endp = bp + 1; + } + ret = show_one_reflog_ent(&sb, fn, cb_data); + strbuf_reset(&sb); + if (ret) + break; } - } - while (!strbuf_getwholeline(&sb, logfp, '\n')) { - unsigned char osha1[20], nsha1[20]; - char *email_end, *message; - unsigned long timestamp; - int tz; - - /* old SP new SP name SP time TAB msg LF */ - if (sb.len < 83 || sb.buf[sb.len - 1] != '\n' || - get_sha1_hex(sb.buf, osha1) || sb.buf[40] != ' ' || - get_sha1_hex(sb.buf + 41, nsha1) || sb.buf[81] != ' ' || - !(email_end = strchr(sb.buf + 82, '>')) || - email_end[1] != ' ' || - !(timestamp = strtoul(email_end + 2, &message, 10)) || - !message || message[0] != ' ' || - (message[1] != '+' && message[1] != '-') || - !isdigit(message[2]) || !isdigit(message[3]) || - !isdigit(message[4]) || !isdigit(message[5])) - continue; /* corrupt? */ - email_end[1] = '\0'; - tz = strtol(message + 1, NULL, 10); - if (message[6] != '\t') - message += 6; - else - message += 7; - ret = fn(osha1, nsha1, sb.buf + 82, timestamp, tz, message, - cb_data); - if (ret) - break; } + if (!ret && sb.len) + ret = show_one_reflog_ent(&sb, fn, cb_data); + fclose(logfp); strbuf_release(&sb); return ret; @@@ -2352,9 -2408,20 +2410,20 @@@ int for_each_reflog_ent(const char *refname, each_reflog_ent_fn fn, void *cb_data) { - return for_each_recent_reflog_ent(refname, fn, 0, cb_data); - } + FILE *logfp; + struct strbuf sb = STRBUF_INIT; + int ret = 0; + + logfp = fopen(git_path("logs/%s", refname), "r"); + if (!logfp) + return -1; + while (!ret && !strbuf_getwholeline(&sb, logfp, '\n')) + ret = show_one_reflog_ent(&sb, fn, cb_data); + fclose(logfp); + strbuf_release(&sb); + return ret; + } /* * Call fn for each reflog in the namespace indicated by name. name * must be empty or end with '/'. Name will be used as a scratch