Pseudorefs should not be updated through the ref transaction API, because alternate ref backends still need to store pseudorefs in GIT_DIR (instead of wherever they store refs). Instead, change update_ref and delete_ref to call pseudoref-specific functions. Signed-off-by: David Turner <dturner@xxxxxxxxxxxxxxxx> --- refs.c | 100 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++------ 1 file changed, 92 insertions(+), 8 deletions(-) diff --git a/refs.c b/refs.c index 0d10b7b..119ac9c 100644 --- a/refs.c +++ b/refs.c @@ -2871,12 +2871,87 @@ static int is_pseudoref(const char *refname) return 1; } +static int write_pseudoref(const char *pseudoref, const unsigned char *sha1, + const unsigned char *old_sha1, struct strbuf *err) +{ + const char *filename; + int fd; + static struct lock_file lock; + struct strbuf buf = STRBUF_INIT; + int ret = -1; + + strbuf_addf(&buf, "%s\n", sha1_to_hex(sha1)); + + filename = git_path("%s", pseudoref); + fd = hold_lock_file_for_update(&lock, filename, LOCK_DIE_ON_ERROR); + if (fd < 0) { + strbuf_addf(err, "Could not open '%s' for writing: %s", + filename, strerror(errno)); + return -1; + } + + if (old_sha1) { + unsigned char actual_old_sha1[20]; + read_ref(pseudoref, actual_old_sha1); + if (hashcmp(actual_old_sha1, old_sha1)) { + strbuf_addf(err, "Unexpected sha1 when writing %s", pseudoref); + rollback_lock_file(&lock); + goto done; + } + } + + if (write_in_full(fd, buf.buf, buf.len) != buf.len) { + strbuf_addf(err, "Could not write to '%s'", filename); + rollback_lock_file(&lock); + goto done; + } + + commit_lock_file(&lock); + ret = 0; +done: + strbuf_release(&buf); + return ret; +} + +static int delete_pseudoref(const char *pseudoref, const unsigned char *old_sha1) +{ + static struct lock_file lock; + const char *filename; + + filename = git_path("%s", pseudoref); + + if (old_sha1 && !is_null_sha1(old_sha1)) { + int fd; + unsigned char actual_old_sha1[20]; + + fd = hold_lock_file_for_update(&lock, filename, + LOCK_DIE_ON_ERROR); + if (fd < 0) + die_errno(_("Could not open '%s' for writing"), filename); + read_ref(pseudoref, actual_old_sha1); + if (hashcmp(actual_old_sha1, old_sha1)) { + warning("Unexpected sha1 when deleting %s", pseudoref); + return -1; + } + + unlink(filename); + rollback_lock_file(&lock); + } else { + unlink(filename); + } + + return 0; +} + int delete_ref(const char *refname, const unsigned char *old_sha1, unsigned int flags) { struct ref_transaction *transaction; struct strbuf err = STRBUF_INIT; + if (is_pseudoref(refname)) + return delete_pseudoref(refname, old_sha1); + transaction = ref_transaction_begin(&err); if (!transaction || ref_transaction_delete(transaction, refname, old_sha1, @@ -3970,17 +4045,25 @@ int update_ref(const char *msg, const char *refname, const unsigned char *new_sha1, const unsigned char *old_sha1, unsigned int flags, enum action_on_err onerr) { - struct ref_transaction *t; + struct ref_transaction *t = NULL; struct strbuf err = STRBUF_INIT; + int ret = 0; - t = ref_transaction_begin(&err); - if (!t || - ref_transaction_update(t, refname, new_sha1, old_sha1, - flags, msg, &err) || - ref_transaction_commit(t, &err)) { + if (is_pseudoref(refname) && 0) { + ret = write_pseudoref(refname, new_sha1, old_sha1, &err); + } else { + t = ref_transaction_begin(&err); + if (!t || + ref_transaction_update(t, refname, new_sha1, old_sha1, + flags, msg, &err) || + ref_transaction_commit(t, &err)) { + ret = 1; + ref_transaction_free(t); + } + } + if (ret) { const char *str = "update_ref failed for ref '%s': %s"; - ref_transaction_free(t); switch (onerr) { case UPDATE_REFS_MSG_ON_ERR: error(str, refname, err.buf); @@ -3995,7 +4078,8 @@ int update_ref(const char *msg, const char *refname, return 1; } strbuf_release(&err); - ref_transaction_free(t); + if (t) + ref_transaction_free(t); return 0; } -- 2.0.4.315.gad8727a-twtrsrc -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html