refs.c: change read_ref_at to use the reflog iterators
read_ref_at has its own parsing of the reflog file for no really good reason so lets change this to use the existing reflog iterators. This removes one instance where we manually unmarshall the reflog file format. Remove the now redundant ref_msg function. Log messages for errors are changed slightly. We no longer print the file name for the reflog, instead we refer to it as 'Log for ref <refname>'. This might be a minor useability regression, but I don't really think so, since experienced users would know where the log is anyway and inexperienced users would not know what to do about/how to repair 'Log ... has gap ...' anyway. Adapt the t1400 test to handle the change in log messages. Signed-off-by: Ronnie Sahlberg <sahlberg@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ronnie Sahlberg
Junio C Hamano
parent
e156455ea4
commit
4207ed285f
202
refs.c
202
refs.c
@ -2930,119 +2930,117 @@ int create_symref(const char *ref_target, const char *refs_heads_master,
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return 0;
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}
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static char *ref_msg(const char *line, const char *endp)
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struct read_ref_at_cb {
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const char *refname;
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unsigned long at_time;
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int cnt;
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int reccnt;
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unsigned char *sha1;
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int found_it;
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unsigned char osha1[20];
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unsigned char nsha1[20];
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int tz;
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unsigned long date;
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char **msg;
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unsigned long *cutoff_time;
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int *cutoff_tz;
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int *cutoff_cnt;
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};
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static int read_ref_at_ent(unsigned char *osha1, unsigned char *nsha1,
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const char *email, unsigned long timestamp, int tz,
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const char *message, void *cb_data)
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{
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const char *ep;
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line += 82;
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ep = memchr(line, '\n', endp - line);
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if (!ep)
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ep = endp;
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return xmemdupz(line, ep - line);
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struct read_ref_at_cb *cb = cb_data;
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cb->reccnt++;
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cb->tz = tz;
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cb->date = timestamp;
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if (timestamp <= cb->at_time || cb->cnt == 0) {
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if (cb->msg)
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*cb->msg = xstrdup(message);
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if (cb->cutoff_time)
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*cb->cutoff_time = timestamp;
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if (cb->cutoff_tz)
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*cb->cutoff_tz = tz;
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if (cb->cutoff_cnt)
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*cb->cutoff_cnt = cb->reccnt - 1;
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/*
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* we have not yet updated cb->[n|o]sha1 so they still
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* hold the values for the previous record.
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*/
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if (!is_null_sha1(cb->osha1)) {
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hashcpy(cb->sha1, nsha1);
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if (hashcmp(cb->osha1, nsha1))
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warning("Log for ref %s has gap after %s.",
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cb->refname, show_date(cb->date, cb->tz, DATE_RFC2822));
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}
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else if (cb->date == cb->at_time)
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hashcpy(cb->sha1, nsha1);
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else if (hashcmp(nsha1, cb->sha1))
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warning("Log for ref %s unexpectedly ended on %s.",
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cb->refname, show_date(cb->date, cb->tz,
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DATE_RFC2822));
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hashcpy(cb->osha1, osha1);
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hashcpy(cb->nsha1, nsha1);
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cb->found_it = 1;
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return 1;
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}
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hashcpy(cb->osha1, osha1);
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hashcpy(cb->nsha1, nsha1);
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if (cb->cnt > 0)
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cb->cnt--;
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return 0;
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}
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static int read_ref_at_ent_oldest(unsigned char *osha1, unsigned char *nsha1,
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const char *email, unsigned long timestamp,
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int tz, const char *message, void *cb_data)
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{
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struct read_ref_at_cb *cb = cb_data;
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if (cb->msg)
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*cb->msg = xstrdup(message);
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if (cb->cutoff_time)
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*cb->cutoff_time = timestamp;
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if (cb->cutoff_tz)
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*cb->cutoff_tz = tz;
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if (cb->cutoff_cnt)
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*cb->cutoff_cnt = cb->reccnt;
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hashcpy(cb->sha1, osha1);
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if (is_null_sha1(cb->sha1))
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hashcpy(cb->sha1, nsha1);
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/* We just want the first entry */
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return 1;
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}
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int read_ref_at(const char *refname, unsigned long at_time, int cnt,
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unsigned char *sha1, char **msg,
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unsigned long *cutoff_time, int *cutoff_tz, int *cutoff_cnt)
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{
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const char *logfile, *logdata, *logend, *rec, *lastgt, *lastrec;
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char *tz_c;
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int logfd, tz, reccnt = 0;
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struct stat st;
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unsigned long date;
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unsigned char logged_sha1[20];
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void *log_mapped;
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size_t mapsz;
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struct read_ref_at_cb cb;
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logfile = git_path("logs/%s", refname);
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logfd = open(logfile, O_RDONLY, 0);
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if (logfd < 0)
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die_errno("Unable to read log '%s'", logfile);
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fstat(logfd, &st);
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if (!st.st_size)
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die("Log %s is empty.", logfile);
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mapsz = xsize_t(st.st_size);
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log_mapped = xmmap(NULL, mapsz, PROT_READ, MAP_PRIVATE, logfd, 0);
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logdata = log_mapped;
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close(logfd);
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memset(&cb, 0, sizeof(cb));
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cb.refname = refname;
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cb.at_time = at_time;
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cb.cnt = cnt;
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cb.msg = msg;
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cb.cutoff_time = cutoff_time;
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cb.cutoff_tz = cutoff_tz;
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cb.cutoff_cnt = cutoff_cnt;
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cb.sha1 = sha1;
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lastrec = NULL;
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rec = logend = logdata + st.st_size;
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while (logdata < rec) {
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reccnt++;
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if (logdata < rec && *(rec-1) == '\n')
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rec--;
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lastgt = NULL;
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while (logdata < rec && *(rec-1) != '\n') {
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rec--;
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if (*rec == '>')
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lastgt = rec;
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}
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if (!lastgt)
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die("Log %s is corrupt.", logfile);
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date = strtoul(lastgt + 1, &tz_c, 10);
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if (date <= at_time || cnt == 0) {
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tz = strtoul(tz_c, NULL, 10);
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if (msg)
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*msg = ref_msg(rec, logend);
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if (cutoff_time)
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*cutoff_time = date;
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if (cutoff_tz)
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*cutoff_tz = tz;
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if (cutoff_cnt)
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*cutoff_cnt = reccnt - 1;
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if (lastrec) {
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if (get_sha1_hex(lastrec, logged_sha1))
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die("Log %s is corrupt.", logfile);
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if (get_sha1_hex(rec + 41, sha1))
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die("Log %s is corrupt.", logfile);
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if (hashcmp(logged_sha1, sha1)) {
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warning("Log %s has gap after %s.",
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logfile, show_date(date, tz, DATE_RFC2822));
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}
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}
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else if (date == at_time) {
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if (get_sha1_hex(rec + 41, sha1))
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die("Log %s is corrupt.", logfile);
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}
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else {
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if (get_sha1_hex(rec + 41, logged_sha1))
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die("Log %s is corrupt.", logfile);
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if (hashcmp(logged_sha1, sha1)) {
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warning("Log %s unexpectedly ended on %s.",
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logfile, show_date(date, tz, DATE_RFC2822));
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}
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}
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munmap(log_mapped, mapsz);
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return 0;
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}
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lastrec = rec;
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if (cnt > 0)
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cnt--;
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}
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for_each_reflog_ent_reverse(refname, read_ref_at_ent, &cb);
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rec = logdata;
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while (rec < logend && *rec != '>' && *rec != '\n')
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rec++;
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if (rec == logend || *rec == '\n')
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die("Log %s is corrupt.", logfile);
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date = strtoul(rec + 1, &tz_c, 10);
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tz = strtoul(tz_c, NULL, 10);
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if (get_sha1_hex(logdata, sha1))
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die("Log %s is corrupt.", logfile);
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if (is_null_sha1(sha1)) {
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if (get_sha1_hex(logdata + 41, sha1))
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die("Log %s is corrupt.", logfile);
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}
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if (msg)
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*msg = ref_msg(logdata, logend);
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munmap(log_mapped, mapsz);
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if (!cb.reccnt)
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die("Log for %s is empty.", refname);
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if (cb.found_it)
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return 0;
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for_each_reflog_ent(refname, read_ref_at_ent_oldest, &cb);
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if (cutoff_time)
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*cutoff_time = date;
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if (cutoff_tz)
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*cutoff_tz = tz;
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if (cutoff_cnt)
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*cutoff_cnt = reccnt;
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return 1;
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}
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@ -235,7 +235,7 @@ test_expect_success \
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'rm -f o e &&
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git rev-parse --verify "master@{2005-05-26 23:33:01}" >o 2>e &&
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test '"$B"' = $(cat o) &&
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test "warning: Log .git/logs/'"$m has gap after $gd"'." = "$(cat e)"'
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test "warning: Log for ref '"$m has gap after $gd"'." = "$(cat e)"'
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test_expect_success \
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'Query "master@{2005-05-26 23:38:00}" (middle of history)' \
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'rm -f o e &&
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@ -253,7 +253,7 @@ test_expect_success \
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'rm -f o e &&
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git rev-parse --verify "master@{2005-05-28}" >o 2>e &&
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test '"$D"' = $(cat o) &&
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test "warning: Log .git/logs/'"$m unexpectedly ended on $ld"'." = "$(cat e)"'
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test "warning: Log for ref '"$m unexpectedly ended on $ld"'." = "$(cat e)"'
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rm -f .git/$m .git/logs/$m expect
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