From: Junio C Hamano Date: Mon, 27 Nov 2017 02:06:35 +0000 (+0900) Subject: Merge branch 'pw/sequencer-recover-from-unlockable-index' X-Git-Tag: v2.16.0-rc0~99 X-Git-Url: https://git.lorimer.id.au/gitweb.git/diff_plain/c2ed68342b8247d99fa1204872984ce9817fbaae?ds=inline;hp=-c Merge branch 'pw/sequencer-recover-from-unlockable-index' The sequencer machinery (used by "git cherry-pick A..B", and "git rebase -i", among other things) would have lost a commit if stopped due to an unlockable index file, which has been fixed. * pw/sequencer-recover-from-unlockable-index: sequencer: reschedule pick if index can't be locked --- c2ed68342b8247d99fa1204872984ce9817fbaae diff --combined sequencer.c index 19dd575ed9,10924ffd49..fa94ed652d --- a/sequencer.c +++ b/sequencer.c @@@ -393,7 -393,7 +393,7 @@@ static int fast_forward_to(const struc transaction = ref_transaction_begin(&err); if (!transaction || ref_transaction_update(transaction, "HEAD", - to->hash, unborn ? null_sha1 : from->hash, + to, unborn ? &null_oid : from, 0, sb.buf, &err) || ref_transaction_commit(transaction, &err)) { ref_transaction_free(transaction); @@@ -438,7 -438,8 +438,8 @@@ static int do_recursive_merge(struct co char **xopt; static struct lock_file index_lock; - hold_locked_index(&index_lock, LOCK_DIE_ON_ERROR); + if (hold_locked_index(&index_lock, LOCK_REPORT_ON_ERROR) < 0) + return -1; read_cache(); @@@ -489,7 -490,7 +490,7 @@@ static int is_index_unchanged(void struct object_id head_oid; struct commit *head_commit; - if (!resolve_ref_unsafe("HEAD", RESOLVE_REF_READING, head_oid.hash, NULL)) + if (!resolve_ref_unsafe("HEAD", RESOLVE_REF_READING, &head_oid, NULL)) return error(_("could not resolve HEAD commit\n")); head_commit = lookup_commit(&head_oid); @@@ -959,8 -960,7 +960,8 @@@ static int do_pick_commit(enum todo_com unborn = get_oid("HEAD", &head); if (unborn) oidcpy(&head, &empty_tree_oid); - if (index_differs_from(unborn ? EMPTY_TREE_SHA1_HEX : "HEAD", 0, 0)) + if (index_differs_from(unborn ? EMPTY_TREE_SHA1_HEX : "HEAD", + NULL, 0)) return error_dirty_index(opts); } discard_cache(); @@@ -1116,12 -1116,12 +1117,12 @@@ * write it at all. */ if (command == TODO_PICK && !opts->no_commit && (res == 0 || res == 1) && - update_ref(NULL, "CHERRY_PICK_HEAD", commit->object.oid.hash, NULL, - REF_NODEREF, UPDATE_REFS_MSG_ON_ERR)) + update_ref(NULL, "CHERRY_PICK_HEAD", &commit->object.oid, NULL, + REF_NO_DEREF, UPDATE_REFS_MSG_ON_ERR)) res = -1; if (command == TODO_REVERT && ((opts->no_commit && res == 0) || res == 1) && - update_ref(NULL, "REVERT_HEAD", commit->object.oid.hash, NULL, - REF_NODEREF, UPDATE_REFS_MSG_ON_ERR)) + update_ref(NULL, "REVERT_HEAD", &commit->object.oid, NULL, + REF_NO_DEREF, UPDATE_REFS_MSG_ON_ERR)) res = -1; if (res) { @@@ -1185,6 -1185,7 +1186,6 @@@ static int read_and_refresh_cache(struc refresh_index(&the_index, REFRESH_QUIET|REFRESH_UNMERGED, NULL, NULL, NULL); if (the_index.cache_changed && index_fd >= 0) { if (write_locked_index(&the_index, &index_lock, COMMIT_LOCK)) { - rollback_lock_file(&index_lock); return error(_("git %s: failed to refresh the index"), _(action_name(opts))); } @@@ -1630,7 -1631,7 +1631,7 @@@ static int rollback_single_pick(void if (!file_exists(git_path_cherry_pick_head()) && !file_exists(git_path_revert_head())) return error(_("no cherry-pick or revert in progress")); - if (read_ref_full("HEAD", 0, head_oid.hash, NULL)) + if (read_ref_full("HEAD", 0, &head_oid, NULL)) return error(_("cannot resolve HEAD")); if (is_null_oid(&head_oid)) return error(_("cannot abort from a branch yet to be born")); @@@ -2129,8 -2130,8 +2130,8 @@@ cleanup_head_ref } msg = reflog_message(opts, "finish", "%s onto %s", head_ref.buf, buf.buf); - if (update_ref(msg, head_ref.buf, head.hash, orig.hash, - REF_NODEREF, UPDATE_REFS_MSG_ON_ERR)) { + if (update_ref(msg, head_ref.buf, &head, &orig, + REF_NO_DEREF, UPDATE_REFS_MSG_ON_ERR)) { res = error(_("could not update %s"), head_ref.buf); goto cleanup_head_ref; @@@ -2284,7 -2285,7 +2285,7 @@@ int sequencer_continue(struct replay_op if (res) goto release_todo_list; } - if (index_differs_from("HEAD", 0, 0)) { + if (index_differs_from("HEAD", NULL, 0)) { res = error_dirty_index(opts); goto release_todo_list; } @@@ -2670,19 -2671,6 +2671,19 @@@ leave_check return res; } +static int rewrite_file(const char *path, const char *buf, size_t len) +{ + int rc = 0; + int fd = open(path, O_WRONLY | O_TRUNC); + if (fd < 0) + return error_errno(_("could not open '%s' for writing"), path); + if (write_in_full(fd, buf, len) < 0) + rc = error_errno(_("could not write to '%s'"), path); + if (close(fd) && !rc) + rc = error_errno(_("could not close '%s'"), path); + return rc; +} + /* skip picking commits whose parents are unchanged */ int skip_unnecessary_picks(void) { @@@ -2755,11 -2743,29 +2756,11 @@@ } close(fd); - fd = open(rebase_path_todo(), O_WRONLY, 0666); - if (fd < 0) { - error_errno(_("could not open '%s' for writing"), - rebase_path_todo()); - todo_list_release(&todo_list); - return -1; - } - if (write_in_full(fd, todo_list.buf.buf + offset, - todo_list.buf.len - offset) < 0) { - error_errno(_("could not write to '%s'"), - rebase_path_todo()); - close(fd); - todo_list_release(&todo_list); - return -1; - } - if (ftruncate(fd, todo_list.buf.len - offset) < 0) { - error_errno(_("could not truncate '%s'"), - rebase_path_todo()); + if (rewrite_file(rebase_path_todo(), todo_list.buf.buf + offset, + todo_list.buf.len - offset) < 0) { todo_list_release(&todo_list); - close(fd); return -1; } - close(fd); todo_list.current = i; if (is_fixup(peek_command(&todo_list, 0))) @@@ -2944,7 -2950,15 +2945,7 @@@ int rearrange_squash(void } } - fd = open(todo_file, O_WRONLY); - if (fd < 0) - res = error_errno(_("could not open '%s'"), todo_file); - else if (write(fd, buf.buf, buf.len) < 0) - res = error_errno(_("could not write to '%s'"), todo_file); - else if (ftruncate(fd, buf.len) < 0) - res = error_errno(_("could not truncate '%s'"), - todo_file); - close(fd); + res = rewrite_file(todo_file, buf.buf, buf.len); strbuf_release(&buf); }