diff options
Diffstat (limited to 'refs.c')
| -rw-r--r-- | refs.c | 181 |
1 files changed, 136 insertions, 45 deletions
@@ -6,6 +6,7 @@ /* ISSYMREF=01 and ISPACKED=02 are public interfaces */ #define REF_KNOWS_PEELED 04 +#define REF_BROKEN 010 struct ref_list { struct ref_list *next; @@ -275,8 +276,10 @@ static struct ref_list *get_ref_dir(const char *base, struct ref_list *list) list = get_ref_dir(ref, list); continue; } - if (!resolve_ref(ref, sha1, 1, &flag)) + if (!resolve_ref(ref, sha1, 1, &flag)) { hashclr(sha1); + flag |= REF_BROKEN; + } list = add_ref(ref, sha1, flag, list, NULL); } free(ref); @@ -286,6 +289,7 @@ static struct ref_list *get_ref_dir(const char *base, struct ref_list *list) } struct warn_if_dangling_data { + FILE *fp; const char *refname; const char *msg_fmt; }; @@ -304,13 +308,17 @@ static int warn_if_dangling_symref(const char *refname, const unsigned char *sha if (!resolves_to || strcmp(resolves_to, d->refname)) return 0; - printf(d->msg_fmt, refname); + fprintf(d->fp, d->msg_fmt, refname); return 0; } -void warn_dangling_symref(const char *msg_fmt, const char *refname) +void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname) { - struct warn_if_dangling_data data = { refname, msg_fmt }; + struct warn_if_dangling_data data; + + data.fp = fp; + data.refname = refname; + data.msg_fmt = msg_fmt; for_each_rawref(warn_if_dangling_symref, &data); } @@ -518,6 +526,13 @@ const char *resolve_ref(const char *ref, unsigned char *sha1, int reading, int * return ref; } +/* The argument to filter_refs */ +struct ref_filter { + const char *pattern; + each_ref_fn *fn; + void *cb_data; +}; + int read_ref(const char *ref, unsigned char *sha1) { if (resolve_ref(ref, sha1, 1, NULL)) @@ -531,10 +546,10 @@ static int do_one_ref(const char *base, each_ref_fn fn, int trim, { if (strncmp(base, entry->name, trim)) return 0; - /* Is this a "negative ref" that represents a deleted ref? */ - if (is_null_sha1(entry->sha1)) - return 0; + if (!(flags & DO_FOR_EACH_INCLUDE_BROKEN)) { + if (entry->flag & REF_BROKEN) + return 0; /* ignore dangling symref */ if (!has_sha1_file(entry->sha1)) { error("%s does not point to a valid object!", entry->name); return 0; @@ -544,6 +559,15 @@ static int do_one_ref(const char *base, each_ref_fn fn, int trim, return fn(entry->name + trim, entry->sha1, entry->flag, cb_data); } +static int filter_refs(const char *ref, const unsigned char *sha, int flags, + void *data) +{ + struct ref_filter *filter = (struct ref_filter *)data; + if (fnmatch(filter->pattern, ref, 0)) + return 0; + return filter->fn(ref, sha, flags, filter->cb_data); +} + int peel_ref(const char *ref, unsigned char *sha1) { int flag; @@ -668,6 +692,46 @@ int for_each_remote_ref(each_ref_fn fn, void *cb_data) return for_each_ref_in("refs/remotes/", fn, cb_data); } +int for_each_replace_ref(each_ref_fn fn, void *cb_data) +{ + return do_for_each_ref("refs/replace/", fn, 13, 0, cb_data); +} + +int for_each_glob_ref_in(each_ref_fn fn, const char *pattern, + const char *prefix, void *cb_data) +{ + struct strbuf real_pattern = STRBUF_INIT; + struct ref_filter filter; + int ret; + + if (!prefix && prefixcmp(pattern, "refs/")) + strbuf_addstr(&real_pattern, "refs/"); + else if (prefix) + strbuf_addstr(&real_pattern, prefix); + strbuf_addstr(&real_pattern, pattern); + + if (!has_glob_specials(pattern)) { + /* Append implied '/' '*' if not present. */ + if (real_pattern.buf[real_pattern.len - 1] != '/') + strbuf_addch(&real_pattern, '/'); + /* No need to check for '*', there is none. */ + strbuf_addch(&real_pattern, '*'); + } + + filter.pattern = real_pattern.buf; + filter.fn = fn; + filter.cb_data = cb_data; + ret = for_each_ref(filter_refs, &filter); + + strbuf_release(&real_pattern); + return ret; +} + +int for_each_glob_ref(each_ref_fn fn, const char *pattern, void *cb_data) +{ + return for_each_glob_ref_in(fn, pattern, NULL, cb_data); +} + int for_each_rawref(each_ref_fn fn, void *cb_data) { return do_for_each_ref("refs/", fn, 0, @@ -967,8 +1031,10 @@ static int repack_without_ref(const char *refname) if (!found) return 0; fd = hold_lock_file_for_update(&packlock, git_path("packed-refs"), 0); - if (fd < 0) + if (fd < 0) { + unable_to_lock_error(git_path("packed-refs"), errno); return error("cannot delete '%s' from packed refs", refname); + } for (list = packed_ref_list; list; list = list->next) { char line[PATH_MAX + 100]; @@ -1024,6 +1090,15 @@ int delete_ref(const char *refname, const unsigned char *sha1, int delopt) return ret; } +/* + * People using contrib's git-new-workdir have .git/logs/refs -> + * /some/other/path/.git/logs/refs, and that may live on another device. + * + * IOW, to avoid cross device rename errors, the temporary renamed log must + * live into logs/refs. + */ +#define TMP_RENAMED_LOG "logs/refs/.tmp-renamed-log" + int rename_ref(const char *oldref, const char *newref, const char *logmsg) { static const char renamed_ref[] = "RENAMED-REF"; @@ -1057,8 +1132,8 @@ int rename_ref(const char *oldref, const char *newref, const char *logmsg) if (write_ref_sha1(lock, orig_sha1, logmsg)) return error("unable to save current sha1 in %s", renamed_ref); - if (log && rename(git_path("logs/%s", oldref), git_path("tmp-renamed-log"))) - return error("unable to move logfile logs/%s to tmp-renamed-log: %s", + if (log && rename(git_path("logs/%s", oldref), git_path(TMP_RENAMED_LOG))) + return error("unable to move logfile logs/%s to "TMP_RENAMED_LOG": %s", oldref, strerror(errno)); if (delete_ref(oldref, orig_sha1, REF_NODEREF)) { @@ -1084,7 +1159,7 @@ int rename_ref(const char *oldref, const char *newref, const char *logmsg) } retry: - if (log && rename(git_path("tmp-renamed-log"), git_path("logs/%s", newref))) { + if (log && rename(git_path(TMP_RENAMED_LOG), git_path("logs/%s", newref))) { if (errno==EISDIR || errno==ENOTDIR) { /* * rename(a, b) when b is an existing @@ -1097,7 +1172,7 @@ int rename_ref(const char *oldref, const char *newref, const char *logmsg) } goto retry; } else { - error("unable to move logfile tmp-renamed-log to logs/%s: %s", + error("unable to move logfile "TMP_RENAMED_LOG" to logs/%s: %s", newref, strerror(errno)); goto rollback; } @@ -1137,8 +1212,8 @@ int rename_ref(const char *oldref, const char *newref, const char *logmsg) error("unable to restore logfile %s from %s: %s", oldref, newref, strerror(errno)); if (!logmoved && log && - rename(git_path("tmp-renamed-log"), git_path("logs/%s", oldref))) - error("unable to restore logfile %s from tmp-renamed-log: %s", + rename(git_path(TMP_RENAMED_LOG), git_path("logs/%s", oldref))) + error("unable to restore logfile %s from "TMP_RENAMED_LOG": %s", oldref, strerror(errno)); return 1; @@ -1196,51 +1271,65 @@ static int copy_msg(char *buf, const char *msg) return cp - buf; } -static int log_ref_write(const char *ref_name, const unsigned char *old_sha1, - const unsigned char *new_sha1, const char *msg) +int log_ref_setup(const char *ref_name, char *logfile, int bufsize) { - int logfd, written, oflags = O_APPEND | O_WRONLY; - unsigned maxlen, len; - int msglen; - char log_file[PATH_MAX]; - char *logrec; - const char *committer; - - if (log_all_ref_updates < 0) - log_all_ref_updates = !is_bare_repository(); - - git_snpath(log_file, sizeof(log_file), "logs/%s", ref_name); + int logfd, oflags = O_APPEND | O_WRONLY; + git_snpath(logfile, bufsize, "logs/%s", ref_name); if (log_all_ref_updates && (!prefixcmp(ref_name, "refs/heads/") || !prefixcmp(ref_name, "refs/remotes/") || + !prefixcmp(ref_name, "refs/notes/") || !strcmp(ref_name, "HEAD"))) { - if (safe_create_leading_directories(log_file) < 0) + if (safe_create_leading_directories(logfile) < 0) return error("unable to create directory for %s", - log_file); + logfile); oflags |= O_CREAT; } - logfd = open(log_file, oflags, 0666); + logfd = open(logfile, oflags, 0666); if (logfd < 0) { if (!(oflags & O_CREAT) && errno == ENOENT) return 0; if ((oflags & O_CREAT) && errno == EISDIR) { - if (remove_empty_directories(log_file)) { + if (remove_empty_directories(logfile)) { return error("There are still logs under '%s'", - log_file); + logfile); } - logfd = open(log_file, oflags, 0666); + logfd = open(logfile, oflags, 0666); } if (logfd < 0) return error("Unable to append to %s: %s", - log_file, strerror(errno)); + logfile, strerror(errno)); } - adjust_shared_perm(log_file); + adjust_shared_perm(logfile); + close(logfd); + return 0; +} +static int log_ref_write(const char *ref_name, const unsigned char *old_sha1, + const unsigned char *new_sha1, const char *msg) +{ + int logfd, result, written, oflags = O_APPEND | O_WRONLY; + unsigned maxlen, len; + int msglen; + char log_file[PATH_MAX]; + char *logrec; + const char *committer; + + if (log_all_ref_updates < 0) + log_all_ref_updates = !is_bare_repository(); + + result = log_ref_setup(ref_name, log_file, sizeof(log_file)); + if (result) + return result; + + logfd = open(log_file, oflags); + if (logfd < 0) + return 0; msglen = msg ? strlen(msg) : 0; committer = git_committer_info(0); maxlen = strlen(committer) + msglen + 100; @@ -1513,7 +1602,7 @@ int for_each_recent_reflog_ent(const char *ref, each_reflog_ent_fn fn, long ofs, { const char *logfile; FILE *logfp; - char buf[1024]; + struct strbuf sb = STRBUF_INIT; int ret = 0; logfile = git_path("logs/%s", ref); @@ -1526,24 +1615,24 @@ int for_each_recent_reflog_ent(const char *ref, each_reflog_ent_fn fn, long ofs, if (fstat(fileno(logfp), &statbuf) || statbuf.st_size < ofs || fseek(logfp, -ofs, SEEK_END) || - fgets(buf, sizeof(buf), logfp)) { + strbuf_getwholeline(&sb, logfp, '\n')) { fclose(logfp); + strbuf_release(&sb); return -1; } } - while (fgets(buf, sizeof(buf), logfp)) { + while (!strbuf_getwholeline(&sb, logfp, '\n')) { unsigned char osha1[20], nsha1[20]; char *email_end, *message; unsigned long timestamp; - int len, tz; + int tz; /* old SP new SP name <email> SP time TAB msg LF */ - len = strlen(buf); - if (len < 83 || buf[len-1] != '\n' || - get_sha1_hex(buf, osha1) || buf[40] != ' ' || - get_sha1_hex(buf + 41, nsha1) || buf[81] != ' ' || - !(email_end = strchr(buf + 82, '>')) || + 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] != ' ' || @@ -1557,11 +1646,13 @@ int for_each_recent_reflog_ent(const char *ref, each_reflog_ent_fn fn, long ofs, message += 6; else message += 7; - ret = fn(osha1, nsha1, buf+82, timestamp, tz, message, cb_data); + ret = fn(osha1, nsha1, sb.buf + 82, timestamp, tz, message, + cb_data); if (ret) break; } fclose(logfp); + strbuf_release(&sb); return ret; } |