diff options
Diffstat (limited to 'sequencer.c')
-rw-r--r-- | sequencer.c | 1398 |
1 files changed, 1272 insertions, 126 deletions
diff --git a/sequencer.c b/sequencer.c index 77d3c2346f..2db52fe800 100644 --- a/sequencer.c +++ b/sequencer.c @@ -2,12 +2,13 @@ #include "config.h" #include "lockfile.h" #include "dir.h" +#include "object-store.h" #include "object.h" #include "commit.h" #include "sequencer.h" #include "tag.h" #include "run-command.h" -#include "exec_cmd.h" +#include "exec-cmd.h" #include "utf8.h" #include "cache-tree.h" #include "diff.h" @@ -23,6 +24,12 @@ #include "hashmap.h" #include "notes-utils.h" #include "sigchain.h" +#include "unpack-trees.h" +#include "worktree.h" +#include "oidmap.h" +#include "oidset.h" +#include "commit-slab.h" +#include "alias.h" #define GIT_REFLOG_ACTION "GIT_REFLOG_ACTION" @@ -56,12 +63,12 @@ static GIT_PATH_FUNC(rebase_path_done, "rebase-merge/done") * The file to keep track of how many commands were already processed (e.g. * for the prompt). */ -static GIT_PATH_FUNC(rebase_path_msgnum, "rebase-merge/msgnum"); +static GIT_PATH_FUNC(rebase_path_msgnum, "rebase-merge/msgnum") /* * The file to keep track of how many commands are to be processed in total * (e.g. for the prompt). */ -static GIT_PATH_FUNC(rebase_path_msgtotal, "rebase-merge/end"); +static GIT_PATH_FUNC(rebase_path_msgtotal, "rebase-merge/end") /* * The commit message that is planned to be used for any changes that * need to be committed following a user interaction. @@ -118,6 +125,19 @@ static GIT_PATH_FUNC(rebase_path_stopped_sha, "rebase-merge/stopped-sha") static GIT_PATH_FUNC(rebase_path_rewritten_list, "rebase-merge/rewritten-list") static GIT_PATH_FUNC(rebase_path_rewritten_pending, "rebase-merge/rewritten-pending") + +/* + * The path of the file containig the OID of the "squash onto" commit, i.e. + * the dummy commit used for `reset [new root]`. + */ +static GIT_PATH_FUNC(rebase_path_squash_onto, "rebase-merge/squash-onto") + +/* + * The path of the file listing refs that need to be deleted after the rebase + * finishes. This is used by the `label` command to record the need for cleanup. + */ +static GIT_PATH_FUNC(rebase_path_refs_to_delete, "rebase-merge/refs-to-delete") + /* * The following files are written by git-rebase just after parsing the * command-line (and are only consumed, not modified, by the sequencer). @@ -125,6 +145,7 @@ static GIT_PATH_FUNC(rebase_path_rewritten_pending, static GIT_PATH_FUNC(rebase_path_gpg_sign_opt, "rebase-merge/gpg_sign_opt") static GIT_PATH_FUNC(rebase_path_orig_head, "rebase-merge/orig-head") static GIT_PATH_FUNC(rebase_path_verbose, "rebase-merge/verbose") +static GIT_PATH_FUNC(rebase_path_signoff, "rebase-merge/signoff") static GIT_PATH_FUNC(rebase_path_head_name, "rebase-merge/head-name") static GIT_PATH_FUNC(rebase_path_onto, "rebase-merge/onto") static GIT_PATH_FUNC(rebase_path_autostash, "rebase-merge/autostash") @@ -156,6 +177,7 @@ static int git_sequencer_config(const char *k, const char *v, void *cb) warning(_("invalid commit message cleanup mode '%s'"), s); + free((char *)s); return status; } @@ -242,9 +264,24 @@ static const char *gpg_sign_opt_quoted(struct replay_opts *opts) int sequencer_remove_state(struct replay_opts *opts) { - struct strbuf dir = STRBUF_INIT; + struct strbuf buf = STRBUF_INIT; int i; + if (is_rebase_i(opts) && + strbuf_read_file(&buf, rebase_path_refs_to_delete(), 0) > 0) { + char *p = buf.buf; + while (*p) { + char *eol = strchr(p, '\n'); + if (eol) + *eol = '\0'; + if (delete_ref("(rebase -i) cleanup", p, NULL, 0) < 0) + warning(_("could not delete '%s'"), p); + if (!eol) + break; + p = eol + 1; + } + } + free(opts->gpg_sign); free(opts->strategy); for (i = 0; i < opts->xopts_nr; i++) @@ -252,9 +289,10 @@ int sequencer_remove_state(struct replay_opts *opts) free(opts->xopts); strbuf_release(&opts->current_fixups); - strbuf_addstr(&dir, get_dir(opts)); - remove_dir_recursively(&dir, 0); - strbuf_release(&dir); + strbuf_reset(&buf); + strbuf_addstr(&buf, get_dir(opts)); + remove_dir_recursively(&buf, 0); + strbuf_release(&buf); return 0; } @@ -269,7 +307,7 @@ static const char *action_name(const struct replay_opts *opts) case REPLAY_INTERACTIVE_REBASE: return N_("rebase -i"); } - die(_("Unknown action: %d"), opts->action); + die(_("unknown action: %d"), opts->action); } struct commit_message { @@ -281,7 +319,7 @@ struct commit_message { static const char *short_commit_name(struct commit *commit) { - return find_unique_abbrev(commit->object.oid.hash, DEFAULT_ABBREV); + return find_unique_abbrev(&commit->object.oid, DEFAULT_ABBREV); } static int get_message(struct commit *commit, struct commit_message *out) @@ -320,7 +358,7 @@ static void print_advice(int show_hint, struct replay_opts *opts) * (typically rebase --interactive) wants to take care * of the commit itself so remove CHERRY_PICK_HEAD */ - unlink(git_path_cherry_pick_head()); + unlink(git_path_cherry_pick_head(the_repository)); return; } @@ -344,12 +382,14 @@ static int write_message(const void *buf, size_t len, const char *filename, if (msg_fd < 0) return error_errno(_("could not lock '%s'"), filename); if (write_in_full(msg_fd, buf, len) < 0) { + error_errno(_("could not write to '%s'"), filename); rollback_lock_file(&msg_file); - return error_errno(_("could not write to '%s'"), filename); + return -1; } if (append_eol && write(msg_fd, "\n", 1) < 0) { + error_errno(_("could not write eol to '%s'"), filename); rollback_lock_file(&msg_file); - return error_errno(_("could not write eol to '%s'"), filename); + return -1; } if (commit_lock_file(&msg_file) < 0) return error(_("failed to finalize '%s'"), filename); @@ -393,7 +433,7 @@ static int read_oneliner(struct strbuf *buf, static struct tree *empty_tree(void) { - return lookup_tree(the_hash_algo->empty_tree); + return lookup_tree(the_repository, the_repository->hash_algo->empty_tree); } static int error_dirty_index(struct replay_opts *opts) @@ -439,7 +479,8 @@ static int fast_forward_to(const struct object_id *to, const struct object_id *f transaction = ref_transaction_begin(&err); if (!transaction || ref_transaction_update(transaction, "HEAD", - to, unborn ? &null_oid : from, + to, unborn && !is_rebase_i(opts) ? + &null_oid : from, 0, sb.buf, &err) || ref_transaction_commit(transaction, &err)) { ref_transaction_free(transaction); @@ -498,8 +539,8 @@ static int do_recursive_merge(struct commit *base, struct commit *next, o.show_rename_progress = 1; head_tree = parse_tree_indirect(head); - next_tree = next ? next->tree : empty_tree(); - base_tree = base ? base->tree : empty_tree(); + next_tree = next ? get_commit_tree(next) : empty_tree(); + base_tree = base ? get_commit_tree(base) : empty_tree(); for (xopt = opts->xopts; xopt != opts->xopts + opts->xopts_nr; xopt++) parse_merge_opt(&o, *xopt); @@ -531,15 +572,29 @@ static int do_recursive_merge(struct commit *base, struct commit *next, return !clean; } +static struct object_id *get_cache_tree_oid(void) +{ + if (!active_cache_tree) + active_cache_tree = cache_tree(); + + if (!cache_tree_fully_valid(active_cache_tree)) + if (cache_tree_update(&the_index, 0)) { + error(_("unable to update cache tree")); + return NULL; + } + + return &active_cache_tree->oid; +} + static int is_index_unchanged(void) { - struct object_id head_oid; + struct object_id head_oid, *cache_tree_oid; struct commit *head_commit; if (!resolve_ref_unsafe("HEAD", RESOLVE_REF_READING, &head_oid, NULL)) return error(_("could not resolve HEAD commit")); - head_commit = lookup_commit(&head_oid); + head_commit = lookup_commit(the_repository, &head_oid); /* * If head_commit is NULL, check_commit, called from @@ -552,15 +607,10 @@ static int is_index_unchanged(void) if (parse_commit(head_commit)) return -1; - if (!active_cache_tree) - active_cache_tree = cache_tree(); - - if (!cache_tree_fully_valid(active_cache_tree)) - if (cache_tree_update(&the_index, 0)) - return error(_("unable to update cache tree")); + if (!(cache_tree_oid = get_cache_tree_oid())) + return -1; - return !oidcmp(&active_cache_tree->oid, - &head_commit->tree->object.oid); + return !oidcmp(cache_tree_oid, get_commit_tree_oid(head_commit)); } static int write_author_script(const char *message) @@ -604,6 +654,7 @@ missing_author: strbuf_addch(&buf, *(message++)); else strbuf_addf(&buf, "'\\\\%c'", *(message++)); + strbuf_addch(&buf, '\''); res = write_message(buf.buf, buf.len, rebase_path_author_script(), 1); strbuf_release(&buf); return res; @@ -652,6 +703,60 @@ static char *get_author(const char *message) return NULL; } +/* Read author-script and return an ident line (author <email> timestamp) */ +static const char *read_author_ident(struct strbuf *buf) +{ + const char *keys[] = { + "GIT_AUTHOR_NAME=", "GIT_AUTHOR_EMAIL=", "GIT_AUTHOR_DATE=" + }; + struct strbuf out = STRBUF_INIT; + char *in, *eol; + const char *val[3]; + int i = 0; + + if (strbuf_read_file(buf, rebase_path_author_script(), 256) <= 0) + return NULL; + + /* dequote values and construct ident line in-place */ + for (in = buf->buf; i < 3 && in - buf->buf < buf->len; i++) { + if (!skip_prefix(in, keys[i], (const char **)&in)) { + warning(_("could not parse '%s' (looking for '%s'"), + rebase_path_author_script(), keys[i]); + return NULL; + } + + eol = strchrnul(in, '\n'); + *eol = '\0'; + if (!sq_dequote(in)) { + warning(_("bad quoting on %s value in '%s'"), + keys[i], rebase_path_author_script()); + return NULL; + } + val[i] = in; + in = eol + 1; + } + + if (i < 3) { + warning(_("could not parse '%s' (looking for '%s')"), + rebase_path_author_script(), keys[i]); + return NULL; + } + + /* validate date since fmt_ident() will die() on bad value */ + if (parse_date(val[2], &out)){ + warning(_("invalid date format '%s' in '%s'"), + val[2], rebase_path_author_script()); + strbuf_release(&out); + return NULL; + } + + strbuf_reset(&out); + strbuf_addstr(&out, fmt_ident(val[0], val[1], val[2], 0)); + strbuf_swap(buf, &out); + strbuf_release(&out); + return buf->buf; +} + static const char staged_changes_advice[] = N_("you have staged changes in your working tree\n" "If these changes are meant to be squashed into the previous commit, run:\n" @@ -671,6 +776,7 @@ N_("you have staged changes in your working tree\n" #define AMEND_MSG (1<<2) #define CLEANUP_MSG (1<<3) #define VERIFY_MSG (1<<4) +#define CREATE_ROOT_COMMIT (1<<5) /* * If we are cherry-pick, and if the merge did not result in @@ -690,6 +796,40 @@ static int run_git_commit(const char *defmsg, struct replay_opts *opts, struct child_process cmd = CHILD_PROCESS_INIT; const char *value; + if ((flags & CREATE_ROOT_COMMIT) && !(flags & AMEND_MSG)) { + struct strbuf msg = STRBUF_INIT, script = STRBUF_INIT; + const char *author = is_rebase_i(opts) ? + read_author_ident(&script) : NULL; + struct object_id root_commit, *cache_tree_oid; + int res = 0; + + if (!defmsg) + BUG("root commit without message"); + + if (!(cache_tree_oid = get_cache_tree_oid())) + res = -1; + + if (!res) + res = strbuf_read_file(&msg, defmsg, 0); + + if (res <= 0) + res = error_errno(_("could not read '%s'"), defmsg); + else + res = commit_tree(msg.buf, msg.len, cache_tree_oid, + NULL, &root_commit, author, + opts->gpg_sign); + + strbuf_release(&msg); + strbuf_release(&script); + if (!res) { + update_ref(NULL, "CHERRY_PICK_HEAD", &root_commit, NULL, + REF_NO_DEREF, UPDATE_REFS_MSG_ON_ERR); + res = update_ref(NULL, "HEAD", &root_commit, NULL, 0, + UPDATE_REFS_MSG_ON_ERR); + } + return res < 0 ? error(_("writing root commit")) : 0; + } + cmd.git_cmd = 1; if (is_rebase_i(opts)) { @@ -970,7 +1110,7 @@ void print_commit_summary(const char *prefix, const struct object_id *oid, struct strbuf author_ident = STRBUF_INIT; struct strbuf committer_ident = STRBUF_INIT; - commit = lookup_commit(oid); + commit = lookup_commit(the_repository, oid); if (!commit) die(_("couldn't look up newly created commit")); if (parse_commit(commit)) @@ -1045,7 +1185,7 @@ static int parse_head(struct commit **head) if (get_oid("HEAD", &oid)) { current_head = NULL; } else { - current_head = lookup_commit_reference(&oid); + current_head = lookup_commit_reference(the_repository, &oid); if (!current_head) return error(_("could not parse HEAD")); if (oidcmp(&oid, ¤t_head->object.oid)) { @@ -1113,14 +1253,14 @@ static int try_to_commit(struct strbuf *msg, const char *author, commit_list_insert(current_head, &parents); } - if (write_cache_as_tree(tree.hash, 0, NULL)) { + if (write_index_as_tree(&tree, &the_index, get_index_file(), 0, NULL)) { res = error(_("git write-tree failed to write a tree")); goto out; } if (!(flags & ALLOW_EMPTY) && !oidcmp(current_head ? - ¤t_head->tree->object.oid : - &empty_tree_oid, &tree)) { + get_commit_tree_oid(current_head) : + the_hash_algo->empty_tree, &tree)) { res = 1; /* run 'git commit' to display error message */ goto out; } @@ -1149,6 +1289,8 @@ static int try_to_commit(struct strbuf *msg, const char *author, goto out; } + reset_ident_date(); + if (commit_tree_extended(msg->buf, msg->len, &tree, parents, oid, author, opts->gpg_sign, extra)) { res = error(_("failed to write commit object")); @@ -1178,7 +1320,8 @@ static int do_commit(const char *msg_file, const char *author, { int res = 1; - if (!(flags & EDIT_MSG) && !(flags & VERIFY_MSG)) { + if (!(flags & EDIT_MSG) && !(flags & VERIFY_MSG) && + !(flags & CREATE_ROOT_COMMIT)) { struct object_id oid; struct strbuf sb = STRBUF_INIT; @@ -1191,8 +1334,8 @@ static int do_commit(const char *msg_file, const char *author, &oid); strbuf_release(&sb); if (!res) { - unlink(git_path_cherry_pick_head()); - unlink(git_path_merge_msg()); + unlink(git_path_cherry_pick_head(the_repository)); + unlink(git_path_merge_msg(the_repository)); if (!is_rebase_i(opts)) print_commit_summary(NULL, &oid, SUMMARY_SHOW_AUTHOR_DATE); @@ -1217,12 +1360,12 @@ static int is_original_commit_empty(struct commit *commit) if (parse_commit(parent)) return error(_("could not parse parent commit %s"), oid_to_hex(&parent->object.oid)); - ptree_oid = &parent->tree->object.oid; + ptree_oid = get_commit_tree_oid(parent); } else { ptree_oid = the_hash_algo->empty_tree; /* commit is root */ } - return !oidcmp(ptree_oid, &commit->tree->object.oid); + return !oidcmp(ptree_oid, get_commit_tree_oid(commit)); } /* @@ -1278,6 +1421,9 @@ enum todo_command { TODO_SQUASH, /* commands that do something else than handling a single commit */ TODO_EXEC, + TODO_LABEL, + TODO_RESET, + TODO_MERGE, /* commands that do nothing but are counted for reporting progress */ TODO_NOOP, TODO_DROP, @@ -1296,6 +1442,9 @@ static struct { { 'f', "fixup" }, { 's', "squash" }, { 'x', "exec" }, + { 'l', "label" }, + { 't', "reset" }, + { 'm', "merge" }, { 0, "noop" }, { 'd', "drop" }, { 0, NULL } @@ -1305,7 +1454,7 @@ static const char *command_to_string(const enum todo_command command) { if (command < TODO_COMMENT) return todo_command_info[command].str; - die("Unknown command: %d", command); + die(_("unknown command: %d"), command); } static char command_to_char(const enum todo_command command) @@ -1325,6 +1474,22 @@ static int is_fixup(enum todo_command command) return command == TODO_FIXUP || command == TODO_SQUASH; } +/* Does this command create a (non-merge) commit? */ +static int is_pick_or_similar(enum todo_command command) +{ + switch (command) { + case TODO_PICK: + case TODO_REVERT: + case TODO_EDIT: + case TODO_REWORD: + case TODO_FIXUP: + case TODO_SQUASH: + return 1; + default: + return 0; + } +} + static int update_squash_messages(enum todo_command command, struct commit *commit, struct replay_opts *opts) { @@ -1355,7 +1520,7 @@ static int update_squash_messages(enum todo_command command, if (get_oid("HEAD", &head)) return error(_("need a HEAD to fixup")); - if (!(head_commit = lookup_commit_reference(&head))) + if (!(head_commit = lookup_commit_reference(the_repository, &head))) return error(_("could not read HEAD")); if (!(head_message = get_commit_buffer(head_commit, NULL))) return error(_("could not read HEAD's commit message")); @@ -1458,7 +1623,7 @@ static int do_pick_commit(enum todo_command command, struct commit *commit, struct replay_opts *opts, int final_fixup) { unsigned int flags = opts->edit ? EDIT_MSG : 0; - const char *msg_file = opts->edit ? NULL : git_path_merge_msg(); + const char *msg_file = opts->edit ? NULL : git_path_merge_msg(the_repository); struct object_id head; struct commit *base, *next, *parent; const char *base_label, *next_label; @@ -1474,13 +1639,20 @@ static int do_pick_commit(enum todo_command command, struct commit *commit, * that represents the "current" state for merge-recursive * to work on. */ - if (write_cache_as_tree(head.hash, 0, NULL)) + if (write_index_as_tree(&head, &the_index, get_index_file(), 0, NULL)) return error(_("your index file is unmerged.")); } else { unborn = get_oid("HEAD", &head); - if (unborn) + /* Do we want to generate a root commit? */ + if (is_pick_or_similar(command) && opts->have_squash_onto && + !oidcmp(&head, &opts->squash_onto)) { + if (is_fixup(command)) + return error(_("cannot fixup root commit")); + flags |= CREATE_ROOT_COMMIT; + unborn = 1; + } else if (unborn) oidcpy(&head, the_hash_algo->empty_tree); - if (index_differs_from(unborn ? EMPTY_TREE_SHA1_HEX : "HEAD", + if (index_differs_from(unborn ? empty_tree_oid_hex() : "HEAD", NULL, 0)) return error_dirty_index(opts); } @@ -1593,18 +1765,18 @@ static int do_pick_commit(enum todo_command command, struct commit *commit, flags |= CLEANUP_MSG; msg_file = rebase_path_fixup_msg(); } else { - const char *dest = git_path_squash_msg(); + const char *dest = git_path_squash_msg(the_repository); unlink(dest); if (copy_file(dest, rebase_path_squash_msg(), 0666)) return error(_("could not rename '%s' to '%s'"), rebase_path_squash_msg(), dest); - unlink(git_path_merge_msg()); + unlink(git_path_merge_msg(the_repository)); msg_file = dest; flags |= EDIT_MSG; } } - if (opts->signoff) + if (opts->signoff && !is_fixup(command)) append_signoff(&msgbuf, 0, 0); if (is_rebase_i(opts) && write_author_script(msg.message) < 0) @@ -1613,15 +1785,16 @@ static int do_pick_commit(enum todo_command command, struct commit *commit, res = do_recursive_merge(base, next, base_label, next_label, &head, &msgbuf, opts); if (res < 0) - return res; + goto leave; + res |= write_message(msgbuf.buf, msgbuf.len, - git_path_merge_msg(), 0); + git_path_merge_msg(the_repository), 0); } else { struct commit_list *common = NULL; struct commit_list *remotes = NULL; res = write_message(msgbuf.buf, msgbuf.len, - git_path_merge_msg(), 0); + git_path_merge_msg(the_repository), 0); commit_list_insert(base, &common); commit_list_insert(next, &remotes); @@ -1700,8 +1873,6 @@ static int prepare_revs(struct replay_opts *opts) if (prepare_revision_walk(opts->revs)) return error(_("revision walk setup failed")); - if (!opts->revs->commits) - return error(_("empty commit set passed")); return 0; } @@ -1725,9 +1896,14 @@ static int read_and_refresh_cache(struct replay_opts *opts) return 0; } +enum todo_item_flags { + TODO_EDIT_MERGE_MSG = 1 +}; + struct todo_item { enum todo_command command; struct commit *commit; + unsigned int flags; const char *arg; int arg_len; size_t offset_in_buf; @@ -1762,6 +1938,8 @@ static int parse_insn_line(struct todo_item *item, const char *bol, char *eol) char *end_of_object_name; int i, saved, status, padding; + item->flags = 0; + /* left-trim */ bol += strspn(bol, " \t"); @@ -1803,13 +1981,29 @@ static int parse_insn_line(struct todo_item *item, const char *bol, char *eol) return error(_("missing arguments for %s"), command_to_string(item->command)); - if (item->command == TODO_EXEC) { + if (item->command == TODO_EXEC || item->command == TODO_LABEL || + item->command == TODO_RESET) { item->commit = NULL; item->arg = bol; item->arg_len = (int)(eol - bol); return 0; } + if (item->command == TODO_MERGE) { + if (skip_prefix(bol, "-C", &bol)) + bol += strspn(bol, " \t"); + else if (skip_prefix(bol, "-c", &bol)) { + bol += strspn(bol, " \t"); + item->flags |= TODO_EDIT_MERGE_MSG; + } else { + item->flags |= TODO_EDIT_MERGE_MSG; + item->commit = NULL; + item->arg = bol; + item->arg_len = (int)(eol - bol); + return 0; + } + } + end_of_object_name = (char *) bol + strcspn(bol, " \t\n"); saved = *end_of_object_name; *end_of_object_name = '\0'; @@ -1822,7 +2016,7 @@ static int parse_insn_line(struct todo_item *item, const char *bol, char *eol) if (status < 0) return -1; - item->commit = lookup_commit_reference(&commit_oid); + item->commit = lookup_commit_reference(the_repository, &commit_oid); return !item->commit; } @@ -1871,6 +2065,23 @@ static int count_commands(struct todo_list *todo_list) return count; } +static int get_item_line_offset(struct todo_list *todo_list, int index) +{ + return index < todo_list->nr ? + todo_list->items[index].offset_in_buf : todo_list->buf.len; +} + +static const char *get_item_line(struct todo_list *todo_list, int index) +{ + return todo_list->buf.buf + get_item_line_offset(todo_list, index); +} + +static int get_item_line_length(struct todo_list *todo_list, int index) +{ + return get_item_line_offset(todo_list, index + 1) + - get_item_line_offset(todo_list, index); +} + static ssize_t strbuf_read_file_or_whine(struct strbuf *sb, const char *path) { int fd; @@ -2003,6 +2214,7 @@ static int populate_opts_cb(const char *key, const char *value, void *data) static void read_strategy_opts(struct replay_opts *opts, struct strbuf *buf) { int i; + char *strategy_opts_string; strbuf_reset(buf); if (!read_oneliner(buf, rebase_path_strategy(), 0)) @@ -2011,7 +2223,11 @@ static void read_strategy_opts(struct replay_opts *opts, struct strbuf *buf) if (!read_oneliner(buf, rebase_path_strategy_opts(), 0)) return; - opts->xopts_nr = split_cmdline(buf->buf, (const char ***)&opts->xopts); + strategy_opts_string = buf->buf; + if (*strategy_opts_string == ' ') + strategy_opts_string++; + opts->xopts_nr = split_cmdline(strategy_opts_string, + (const char ***)&opts->xopts); for (i = 0; i < opts->xopts_nr; i++) { const char *arg = opts->xopts[i]; @@ -2046,6 +2262,11 @@ static int read_populate_opts(struct replay_opts *opts) if (file_exists(rebase_path_verbose())) opts->verbose = 1; + if (file_exists(rebase_path_signoff())) { + opts->allow_ff = 0; + opts->signoff = 1; + } + read_strategy_opts(opts, &buf); strbuf_release(&buf); @@ -2059,6 +2280,12 @@ static int read_populate_opts(struct replay_opts *opts) } } + if (read_oneliner(&buf, rebase_path_squash_onto(), 0)) { + if (get_oid_hex(buf.buf, &opts->squash_onto) < 0) + return error(_("unusable squash-onto")); + opts->have_squash_onto = 1; + } + return 0; } @@ -2103,6 +2330,10 @@ static int walk_revs_populate_todo(struct todo_list *todo_list, short_commit_name(commit), subject_len, subject); unuse_commit_buffer(commit, commit_buffer); } + + if (!todo_list->nr) + return error(_("empty commit set passed")); + return 0; } @@ -2132,9 +2363,9 @@ static int save_head(const char *head) written = write_in_full(fd, buf.buf, buf.len); strbuf_release(&buf); if (written < 0) { + error_errno(_("could not write to '%s'"), git_path_head_file()); rollback_lock_file(&head_lock); - return error_errno(_("could not write to '%s'"), - git_path_head_file()); + return -1; } if (commit_lock_file(&head_lock) < 0) return error(_("failed to finalize '%s'"), git_path_head_file()); @@ -2180,8 +2411,8 @@ static int rollback_single_pick(void) { struct object_id head_oid; - if (!file_exists(git_path_cherry_pick_head()) && - !file_exists(git_path_revert_head())) + if (!file_exists(git_path_cherry_pick_head(the_repository)) && + !file_exists(git_path_revert_head(the_repository))) return error(_("no cherry-pick or revert in progress")); if (read_ref_full("HEAD", 0, &head_oid, NULL)) return error(_("cannot resolve HEAD")); @@ -2255,29 +2486,27 @@ static int save_todo(struct todo_list *todo_list, struct replay_opts *opts) fd = hold_lock_file_for_update(&todo_lock, todo_path, 0); if (fd < 0) return error_errno(_("could not lock '%s'"), todo_path); - offset = next < todo_list->nr ? - todo_list->items[next].offset_in_buf : todo_list->buf.len; + offset = get_item_line_offset(todo_list, next); if (write_in_full(fd, todo_list->buf.buf + offset, todo_list->buf.len - offset) < 0) return error_errno(_("could not write to '%s'"), todo_path); if (commit_lock_file(&todo_lock) < 0) return error(_("failed to finalize '%s'"), todo_path); - if (is_rebase_i(opts)) { - const char *done_path = rebase_path_done(); - int fd = open(done_path, O_CREAT | O_WRONLY | O_APPEND, 0666); - int prev_offset = !next ? 0 : - todo_list->items[next - 1].offset_in_buf; + if (is_rebase_i(opts) && next > 0) { + const char *done = rebase_path_done(); + int fd = open(done, O_CREAT | O_WRONLY | O_APPEND, 0666); + int ret = 0; - if (fd >= 0 && offset > prev_offset && - write_in_full(fd, todo_list->buf.buf + prev_offset, - offset - prev_offset) < 0) { - close(fd); - return error_errno(_("could not write to '%s'"), - done_path); - } - if (fd >= 0) - close(fd); + if (fd < 0) + return 0; + if (write_in_full(fd, get_item_line(todo_list, next - 1), + get_item_line_length(todo_list, next - 1)) + < 0) + ret = error_errno(_("could not write to '%s'"), done); + if (close(fd) < 0) + ret = error_errno(_("failed to finalize '%s'"), done); + return ret; } return 0; } @@ -2388,15 +2617,17 @@ static int error_with_patch(struct commit *commit, if (intend_to_amend()) return -1; - fprintf(stderr, "You can amend the commit now, with\n" - "\n" - " git commit --amend %s\n" - "\n" - "Once you are satisfied with your changes, run\n" - "\n" - " git rebase --continue\n", gpg_sign_opt_quoted(opts)); + fprintf(stderr, + _("You can amend the commit now, with\n" + "\n" + " git commit --amend %s\n" + "\n" + "Once you are satisfied with your changes, run\n" + "\n" + " git rebase --continue\n"), + gpg_sign_opt_quoted(opts)); } else if (exit_code) - fprintf(stderr, "Could not apply %s... %.*s\n", + fprintf_ln(stderr, _("Could not apply %s... %.*s"), short_commit_name(commit), subject_len, subject); return exit_code; @@ -2408,10 +2639,11 @@ static int error_failed_squash(struct commit *commit, if (copy_file(rebase_path_message(), rebase_path_squash_msg(), 0666)) return error(_("could not copy '%s' to '%s'"), rebase_path_squash_msg(), rebase_path_message()); - unlink(git_path_merge_msg()); - if (copy_file(git_path_merge_msg(), rebase_path_message(), 0666)) + unlink(git_path_merge_msg(the_repository)); + if (copy_file(git_path_merge_msg(the_repository), rebase_path_message(), 0666)) return error(_("could not copy '%s' to '%s'"), - rebase_path_message(), git_path_merge_msg()); + rebase_path_message(), + git_path_merge_msg(the_repository)); return error_with_patch(commit, subject, subject_len, opts, 1, 0); } @@ -2424,6 +2656,8 @@ static int do_exec(const char *command_line) fprintf(stderr, "Executing: %s\n", command_line); child_argv[0] = command_line; argv_array_pushf(&child_env, "GIT_DIR=%s", absolute_path(get_git_dir())); + argv_array_pushf(&child_env, "GIT_WORK_TREE=%s", + absolute_path(get_git_work_tree())); status = run_command_v_opt_cd_env(child_argv, RUN_USING_SHELL, NULL, child_env.argv); @@ -2460,6 +2694,461 @@ static int do_exec(const char *command_line) return status; } +static int safe_append(const char *filename, const char *fmt, ...) +{ + va_list ap; + struct lock_file lock = LOCK_INIT; + int fd = hold_lock_file_for_update(&lock, filename, + LOCK_REPORT_ON_ERROR); + struct strbuf buf = STRBUF_INIT; + + if (fd < 0) + return -1; + + if (strbuf_read_file(&buf, filename, 0) < 0 && errno != ENOENT) { + error_errno(_("could not read '%s'"), filename); + rollback_lock_file(&lock); + return -1; + } + strbuf_complete(&buf, '\n'); + va_start(ap, fmt); + strbuf_vaddf(&buf, fmt, ap); + va_end(ap); + + if (write_in_full(fd, buf.buf, buf.len) < 0) { + error_errno(_("could not write to '%s'"), filename); + strbuf_release(&buf); + rollback_lock_file(&lock); + return -1; + } + if (commit_lock_file(&lock) < 0) { + strbuf_release(&buf); + rollback_lock_file(&lock); + return error(_("failed to finalize '%s'"), filename); + } + + strbuf_release(&buf); + return 0; +} + +static int do_label(const char *name, int len) +{ + struct ref_store *refs = get_main_ref_store(the_repository); + struct ref_transaction *transaction; + struct strbuf ref_name = STRBUF_INIT, err = STRBUF_INIT; + struct strbuf msg = STRBUF_INIT; + int ret = 0; + struct object_id head_oid; + + if (len == 1 && *name == '#') + return error(_("illegal label name: '%.*s'"), len, name); + + strbuf_addf(&ref_name, "refs/rewritten/%.*s", len, name); + strbuf_addf(&msg, "rebase -i (label) '%.*s'", len, name); + + transaction = ref_store_transaction_begin(refs, &err); + if (!transaction) { + error("%s", err.buf); + ret = -1; + } else if (get_oid("HEAD", &head_oid)) { + error(_("could not read HEAD")); + ret = -1; + } else if (ref_transaction_update(transaction, ref_name.buf, &head_oid, + NULL, 0, msg.buf, &err) < 0 || + ref_transaction_commit(transaction, &err)) { + error("%s", err.buf); + ret = -1; + } + ref_transaction_free(transaction); + strbuf_release(&err); + strbuf_release(&msg); + + if (!ret) + ret = safe_append(rebase_path_refs_to_delete(), + "%s\n", ref_name.buf); + strbuf_release(&ref_name); + + return ret; +} + +static const char *reflog_message(struct replay_opts *opts, + const char *sub_action, const char *fmt, ...); + +static int do_reset(const char *name, int len, struct replay_opts *opts) +{ + struct strbuf ref_name = STRBUF_INIT; + struct object_id oid; + struct lock_file lock = LOCK_INIT; + struct tree_desc desc; + struct tree *tree; + struct unpack_trees_options unpack_tree_opts; + int ret = 0, i; + + if (hold_locked_index(&lock, LOCK_REPORT_ON_ERROR) < 0) + return -1; + + if (len == 10 && !strncmp("[new root]", name, len)) { + if (!opts->have_squash_onto) { + const char *hex; + if (commit_tree("", 0, the_hash_algo->empty_tree, + NULL, &opts->squash_onto, + NULL, NULL)) + return error(_("writing fake root commit")); + opts->have_squash_onto = 1; + hex = oid_to_hex(&opts->squash_onto); + if (write_message(hex, strlen(hex), + rebase_path_squash_onto(), 0)) + return error(_("writing squash-onto")); + } + oidcpy(&oid, &opts->squash_onto); + } else { + /* Determine the length of the label */ + for (i = 0; i < len; i++) + if (isspace(name[i])) + len = i; + + strbuf_addf(&ref_name, "refs/rewritten/%.*s", len, name); + if (get_oid(ref_name.buf, &oid) && + get_oid(ref_name.buf + strlen("refs/rewritten/"), &oid)) { + error(_("could not read '%s'"), ref_name.buf); + rollback_lock_file(&lock); + strbuf_release(&ref_name); + return -1; + } + } + + memset(&unpack_tree_opts, 0, sizeof(unpack_tree_opts)); + setup_unpack_trees_porcelain(&unpack_tree_opts, "reset"); + unpack_tree_opts.head_idx = 1; + unpack_tree_opts.src_index = &the_index; + unpack_tree_opts.dst_index = &the_index; + unpack_tree_opts.fn = oneway_merge; + unpack_tree_opts.merge = 1; + unpack_tree_opts.update = 1; + + if (read_cache_unmerged()) { + rollback_lock_file(&lock); + strbuf_release(&ref_name); + return error_resolve_conflict(_(action_name(opts))); + } + + if (!fill_tree_descriptor(&desc, &oid)) { + error(_("failed to find tree of %s"), oid_to_hex(&oid)); + rollback_lock_file(&lock); + free((void *)desc.buffer); + strbuf_release(&ref_name); + return -1; + } + + if (unpack_trees(1, &desc, &unpack_tree_opts)) { + rollback_lock_file(&lock); + free((void *)desc.buffer); + strbuf_release(&ref_name); + return -1; + } + + tree = parse_tree_indirect(&oid); + prime_cache_tree(&the_index, tree); + + if (write_locked_index(&the_index, &lock, COMMIT_LOCK) < 0) + ret = error(_("could not write index")); + free((void *)desc.buffer); + + if (!ret) + ret = update_ref(reflog_message(opts, "reset", "'%.*s'", + len, name), "HEAD", &oid, + NULL, 0, UPDATE_REFS_MSG_ON_ERR); + + strbuf_release(&ref_name); + return ret; +} + +static struct commit *lookup_label(const char *label, int len, + struct strbuf *buf) +{ + struct commit *commit; + + strbuf_reset(buf); + strbuf_addf(buf, "refs/rewritten/%.*s", len, label); + commit = lookup_commit_reference_by_name(buf->buf); + if (!commit) { + /* fall back to non-rewritten ref or commit */ + strbuf_splice(buf, 0, strlen("refs/rewritten/"), "", 0); + commit = lookup_commit_reference_by_name(buf->buf); + } + + if (!commit) + error(_("could not resolve '%s'"), buf->buf); + + return commit; +} + +static int do_merge(struct commit *commit, const char *arg, int arg_len, + int flags, struct replay_opts *opts) +{ + int run_commit_flags = (flags & TODO_EDIT_MERGE_MSG) ? + EDIT_MSG | VERIFY_MSG : 0; + struct strbuf ref_name = STRBUF_INIT; + struct commit *head_commit, *merge_commit, *i; + struct commit_list *bases, *j, *reversed = NULL; + struct commit_list *to_merge = NULL, **tail = &to_merge; + struct merge_options o; + int merge_arg_len, oneline_offset, can_fast_forward, ret, k; + static struct lock_file lock; + const char *p; + + if (hold_locked_index(&lock, LOCK_REPORT_ON_ERROR) < 0) { + ret = -1; + goto leave_merge; + } + + head_commit = lookup_commit_reference_by_name("HEAD"); + if (!head_commit) { + ret = error(_("cannot merge without a current revision")); + goto leave_merge; + } + + /* + * For octopus merges, the arg starts with the list of revisions to be + * merged. The list is optionally followed by '#' and the oneline. + */ + merge_arg_len = oneline_offset = arg_len; + for (p = arg; p - arg < arg_len; p += strspn(p, " \t\n")) { + if (!*p) + break; + if (*p == '#' && (!p[1] || isspace(p[1]))) { + p += 1 + strspn(p + 1, " \t\n"); + oneline_offset = p - arg; + break; + } + k = strcspn(p, " \t\n"); + if (!k) + continue; + merge_commit = lookup_label(p, k, &ref_name); + if (!merge_commit) { + ret = error(_("unable to parse '%.*s'"), k, p); + goto leave_merge; + } + tail = &commit_list_insert(merge_commit, tail)->next; + p += k; + merge_arg_len = p - arg; + } + + if (!to_merge) { + ret = error(_("nothing to merge: '%.*s'"), arg_len, arg); + goto leave_merge; + } + + if (opts->have_squash_onto && + !oidcmp(&head_commit->object.oid, &opts->squash_onto)) { + /* + * When the user tells us to "merge" something into a + * "[new root]", let's simply fast-forward to the merge head. + */ + rollback_lock_file(&lock); + if (to_merge->next) + ret = error(_("octopus merge cannot be executed on " + "top of a [new root]")); + else + ret = fast_forward_to(&to_merge->item->object.oid, + &head_commit->object.oid, 0, + opts); + goto leave_merge; + } + + if (commit) { + const char *message = get_commit_buffer(commit, NULL); + const char *body; + int len; + + if (!message) { + ret = error(_("could not get commit message of '%s'"), + oid_to_hex(&commit->object.oid)); + goto leave_merge; + } + write_author_script(message); + find_commit_subject(message, &body); + len = strlen(body); + ret = write_message(body, len, git_path_merge_msg(the_repository), 0); + unuse_commit_buffer(commit, message); + if (ret) { + error_errno(_("could not write '%s'"), + git_path_merge_msg(the_repository)); + goto leave_merge; + } + } else { + struct strbuf buf = STRBUF_INIT; + int len; + + strbuf_addf(&buf, "author %s", git_author_info(0)); + write_author_script(buf.buf); + strbuf_reset(&buf); + + if (oneline_offset < arg_len) { + p = arg + oneline_offset; + len = arg_len - oneline_offset; + } else { + strbuf_addf(&buf, "Merge %s '%.*s'", + to_merge->next ? "branches" : "branch", + merge_arg_len, arg); + p = buf.buf; + len = buf.len; + } + + ret = write_message(p, len, git_path_merge_msg(the_repository), 0); + strbuf_release(&buf); + if (ret) { + error_errno(_("could not write '%s'"), + git_path_merge_msg(the_repository)); + goto leave_merge; + } + } + + /* + * If HEAD is not identical to the first parent of the original merge + * commit, we cannot fast-forward. + */ + can_fast_forward = opts->allow_ff && commit && commit->parents && + !oidcmp(&commit->parents->item->object.oid, + &head_commit->object.oid); + + /* + * If any merge head is different from the original one, we cannot + * fast-forward. + */ + if (can_fast_forward) { + struct commit_list *p = commit->parents->next; + + for (j = to_merge; j && p; j = j->next, p = p->next) + if (oidcmp(&j->item->object.oid, + &p->item->object.oid)) { + can_fast_forward = 0; + break; + } + /* + * If the number of merge heads differs from the original merge + * commit, we cannot fast-forward. + */ + if (j || p) + can_fast_forward = 0; + } + + if (can_fast_forward) { + rollback_lock_file(&lock); + ret = fast_forward_to(&commit->object.oid, + &head_commit->object.oid, 0, opts); + goto leave_merge; + } + + if (to_merge->next) { + /* Octopus merge */ + struct child_process cmd = CHILD_PROCESS_INIT; + + if (read_env_script(&cmd.env_array)) { + const char *gpg_opt = gpg_sign_opt_quoted(opts); + + ret = error(_(staged_changes_advice), gpg_opt, gpg_opt); + goto leave_merge; + } + + cmd.git_cmd = 1; + argv_array_push(&cmd.args, "merge"); + argv_array_push(&cmd.args, "-s"); + argv_array_push(&cmd.args, "octopus"); + argv_array_push(&cmd.args, "--no-edit"); + argv_array_push(&cmd.args, "--no-ff"); + argv_array_push(&cmd.args, "--no-log"); + argv_array_push(&cmd.args, "--no-stat"); + argv_array_push(&cmd.args, "-F"); + argv_array_push(&cmd.args, git_path_merge_msg(the_repository)); + if (opts->gpg_sign) + argv_array_push(&cmd.args, opts->gpg_sign); + + /* Add the tips to be merged */ + for (j = to_merge; j; j = j->next) + argv_array_push(&cmd.args, + oid_to_hex(&j->item->object.oid)); + + strbuf_release(&ref_name); + unlink(git_path_cherry_pick_head(the_repository)); + rollback_lock_file(&lock); + + rollback_lock_file(&lock); + ret = run_command(&cmd); + + /* force re-reading of the cache */ + if (!ret && (discard_cache() < 0 || read_cache() < 0)) + ret = error(_("could not read index")); + goto leave_merge; + } + + merge_commit = to_merge->item; + write_message(oid_to_hex(&merge_commit->object.oid), GIT_SHA1_HEXSZ, + git_path_merge_head(the_repository), 0); + write_message("no-ff", 5, git_path_merge_mode(the_repository), 0); + + bases = get_merge_bases(head_commit, merge_commit); + if (bases && !oidcmp(&merge_commit->object.oid, + &bases->item->object.oid)) { + ret = 0; + /* skip merging an ancestor of HEAD */ + goto leave_merge; + } + + for (j = bases; j; j = j->next) + commit_list_insert(j->item, &reversed); + free_commit_list(bases); + + read_cache(); + init_merge_options(&o); + o.branch1 = "HEAD"; + o.branch2 = ref_name.buf; + o.buffer_output = 2; + + ret = merge_recursive(&o, head_commit, merge_commit, reversed, &i); + if (ret <= 0) + fputs(o.obuf.buf, stdout); + strbuf_release(&o.obuf); + if (ret < 0) { + error(_("could not even attempt to merge '%.*s'"), + merge_arg_len, arg); + goto leave_merge; + } + /* + * The return value of merge_recursive() is 1 on clean, and 0 on + * unclean merge. + * + * Let's reverse that, so that do_merge() returns 0 upon success and + * 1 upon failed merge (keeping the return value -1 for the cases where + * we will want to reschedule the `merge` command). + */ + ret = !ret; + + if (active_cache_changed && + write_locked_index(&the_index, &lock, COMMIT_LOCK)) { + ret = error(_("merge: Unable to write new index file")); + goto leave_merge; + } + + rollback_lock_file(&lock); + if (ret) + rerere(opts->allow_rerere_auto); + else + /* + * In case of problems, we now want to return a positive + * value (a negative one would indicate that the `merge` + * command needs to be rescheduled). + */ + ret = !!run_git_commit(git_path_merge_msg(the_repository), opts, + run_commit_flags); + +leave_merge: + strbuf_release(&ref_name); + rollback_lock_file(&lock); + free_commit_list(to_merge); + return ret; +} + static int is_final_fixup(struct todo_list *todo_list) { int i = todo_list->current; @@ -2550,9 +3239,20 @@ static const char *reflog_message(struct replay_opts *opts, return buf.buf; } +static const char rescheduled_advice[] = +N_("Could not execute the todo command\n" +"\n" +" %.*s" +"\n" +"It has been rescheduled; To edit the command before continuing, please\n" +"edit the todo list first:\n" +"\n" +" git rebase --edit-todo\n" +" git rebase --continue\n"); + static int pick_commits(struct todo_list *todo_list, struct replay_opts *opts) { - int res = 0; + int res = 0, reschedule = 0; setenv(GIT_REFLOG_ACTION, action_name(opts), 0); if (opts->allow_ff) @@ -2595,6 +3295,11 @@ static int pick_commits(struct todo_list *todo_list, struct replay_opts *opts) opts, is_final_fixup(todo_list)); if (is_rebase_i(opts) && res < 0) { /* Reschedule */ + advise(_(rescheduled_advice), + get_item_line_length(todo_list, + todo_list->current), + get_item_line(todo_list, + todo_list->current)); todo_list->current--; if (save_todo(todo_list, opts)) return -1; @@ -2618,10 +3323,27 @@ static int pick_commits(struct todo_list *todo_list, struct replay_opts *opts) intend_to_amend(); return error_failed_squash(item->commit, opts, item->arg_len, item->arg); - } else if (res && is_rebase_i(opts)) + } else if (res && is_rebase_i(opts) && item->commit) { + int to_amend = 0; + struct object_id oid; + + /* + * If we are rewording and have either + * fast-forwarded already, or are about to + * create a new root commit, we want to amend, + * otherwise we do not. + */ + if (item->command == TODO_REWORD && + !get_oid("HEAD", &oid) && + (!oidcmp(&item->commit->object.oid, &oid) || + (opts->have_squash_onto && + !oidcmp(&opts->squash_onto, &oid)))) + to_amend = 1; + return res | error_with_patch(item->commit, - item->arg, item->arg_len, opts, res, - item->command == TODO_REWORD); + item->arg, item->arg_len, opts, + res, to_amend); + } } else if (item->command == TODO_EXEC) { char *end_of_arg = (char *)(item->arg + item->arg_len); int saved = *end_of_arg; @@ -2644,9 +3366,44 @@ static int pick_commits(struct todo_list *todo_list, struct replay_opts *opts) /* `current` will be incremented below */ todo_list->current = -1; } + } else if (item->command == TODO_LABEL) { + if ((res = do_label(item->arg, item->arg_len))) + reschedule = 1; + } else if (item->command == TODO_RESET) { + if ((res = do_reset(item->arg, item->arg_len, opts))) + reschedule = 1; + } else if (item->command == TODO_MERGE) { + if ((res = do_merge(item->commit, + item->arg, item->arg_len, + item->flags, opts)) < 0) + reschedule = 1; + else if (item->commit) + record_in_rewritten(&item->commit->object.oid, + peek_command(todo_list, 1)); + if (res > 0) + /* failed with merge conflicts */ + return error_with_patch(item->commit, + item->arg, + item->arg_len, opts, + res, 0); } else if (!is_noop(item->command)) return error(_("unknown command %d"), item->command); + if (reschedule) { + advise(_(rescheduled_advice), + get_item_line_length(todo_list, + todo_list->current), + get_item_line(todo_list, todo_list->current)); + todo_list->current--; + if (save_todo(todo_list, opts)) + return -1; + if (item->commit) + return error_with_patch(item->commit, + item->arg, + item->arg_len, opts, + res, 0); + } + todo_list->current++; if (res) return res; @@ -2767,8 +3524,8 @@ static int continue_single_pick(void) { const char *argv[] = { "commit", NULL }; - if (!file_exists(git_path_cherry_pick_head()) && - !file_exists(git_path_revert_head())) + if (!file_exists(git_path_cherry_pick_head(the_repository)) && + !file_exists(git_path_revert_head(the_repository))) return error(_("no cherry-pick or revert in progress")); return run_command_v_opt(argv, RUN_GIT_CMD); } @@ -2871,7 +3628,7 @@ static int commit_staged_changes(struct replay_opts *opts, } if (is_clean) { - const char *cherry_pick_head = git_path_cherry_pick_head(); + const char *cherry_pick_head = git_path_cherry_pick_head(the_repository); if (file_exists(cherry_pick_head) && unlink(cherry_pick_head)) return error(_("could not remove CHERRY_PICK_HEAD")); @@ -2921,8 +3678,8 @@ int sequencer_continue(struct replay_opts *opts) if (!is_rebase_i(opts)) { /* Verify that the conflict has been resolved */ - if (file_exists(git_path_cherry_pick_head()) || - file_exists(git_path_revert_head())) { + if (file_exists(git_path_cherry_pick_head(the_repository)) || + file_exists(git_path_revert_head(the_repository))) { res = continue_single_pick(); if (res) goto release_todo_list; @@ -2974,8 +3731,10 @@ int sequencer_pick_revisions(struct replay_opts *opts) continue; if (!get_oid(name, &oid)) { - if (!lookup_commit_reference_gently(&oid, 1)) { - enum object_type type = sha1_object_info(oid.hash, NULL); + if (!lookup_commit_reference_gently(the_repository, &oid, 1)) { + enum object_type type = oid_object_info(the_repository, + &oid, + NULL); return error(_("%s: can't cherry-pick a %s"), name, type_name(type)); } @@ -2998,8 +3757,10 @@ int sequencer_pick_revisions(struct replay_opts *opts) if (prepare_revision_walk(opts->revs)) return error(_("revision walk setup failed")); cmit = get_revision(opts->revs); - if (!cmit || get_revision(opts->revs)) - return error("BUG: expected exactly one commit from walk"); + if (!cmit) + return error(_("empty commit set passed")); + if (get_revision(opts->revs)) + BUG("unexpected extra commit from walk"); return single_pick(cmit, opts); } @@ -3085,6 +3846,346 @@ void append_signoff(struct strbuf *msgbuf, int ignore_footer, unsigned flag) strbuf_release(&sob); } +struct labels_entry { + struct hashmap_entry entry; + char label[FLEX_ARRAY]; +}; + +static int labels_cmp(const void *fndata, const struct labels_entry *a, + const struct labels_entry *b, const void *key) +{ + return key ? strcmp(a->label, key) : strcmp(a->label, b->label); +} + +struct string_entry { + struct oidmap_entry entry; + char string[FLEX_ARRAY]; +}; + +struct label_state { + struct oidmap commit2label; + struct hashmap labels; + struct strbuf buf; +}; + +static const char *label_oid(struct object_id *oid, const char *label, + struct label_state *state) +{ + struct labels_entry *labels_entry; + struct string_entry *string_entry; + struct object_id dummy; + size_t len; + int i; + + string_entry = oidmap_get(&state->commit2label, oid); + if (string_entry) + return string_entry->string; + + /* + * For "uninteresting" commits, i.e. commits that are not to be + * rebased, and which can therefore not be labeled, we use a unique + * abbreviation of the commit name. This is slightly more complicated + * than calling find_unique_abbrev() because we also need to make + * sure that the abbreviation does not conflict with any other + * label. + * + * We disallow "interesting" commits to be labeled by a string that + * is a valid full-length hash, to ensure that we always can find an + * abbreviation for any uninteresting commit's names that does not + * clash with any other label. + */ + if (!label) { + char *p; + + strbuf_reset(&state->buf); + strbuf_grow(&state->buf, GIT_SHA1_HEXSZ); + label = p = state->buf.buf; + + find_unique_abbrev_r(p, oid, default_abbrev); + + /* + * We may need to extend the abbreviated hash so that there is + * no conflicting label. + */ + if (hashmap_get_from_hash(&state->labels, strihash(p), p)) { + size_t i = strlen(p) + 1; + + oid_to_hex_r(p, oid); + for (; i < GIT_SHA1_HEXSZ; i++) { + char save = p[i]; + p[i] = '\0'; + if (!hashmap_get_from_hash(&state->labels, + strihash(p), p)) + break; + p[i] = save; + } + } + } else if (((len = strlen(label)) == the_hash_algo->hexsz && + !get_oid_hex(label, &dummy)) || + (len == 1 && *label == '#') || + hashmap_get_from_hash(&state->labels, + strihash(label), label)) { + /* + * If the label already exists, or if the label is a valid full + * OID, or the label is a '#' (which we use as a separator + * between merge heads and oneline), we append a dash and a + * number to make it unique. + */ + struct strbuf *buf = &state->buf; + + strbuf_reset(buf); + strbuf_add(buf, label, len); + + for (i = 2; ; i++) { + strbuf_setlen(buf, len); + strbuf_addf(buf, "-%d", i); + if (!hashmap_get_from_hash(&state->labels, + strihash(buf->buf), + buf->buf)) + break; + } + + label = buf->buf; + } + + FLEX_ALLOC_STR(labels_entry, label, label); + hashmap_entry_init(labels_entry, strihash(label)); + hashmap_add(&state->labels, labels_entry); + + FLEX_ALLOC_STR(string_entry, string, label); + oidcpy(&string_entry->entry.oid, oid); + oidmap_put(&state->commit2label, string_entry); + + return string_entry->string; +} + +static int make_script_with_merges(struct pretty_print_context *pp, + struct rev_info *revs, FILE *out, + unsigned flags) +{ + int keep_empty = flags & TODO_LIST_KEEP_EMPTY; + int rebase_cousins = flags & TODO_LIST_REBASE_COUSINS; + struct strbuf buf = STRBUF_INIT, oneline = STRBUF_INIT; + struct strbuf label = STRBUF_INIT; + struct commit_list *commits = NULL, **tail = &commits, *iter; + struct commit_list *tips = NULL, **tips_tail = &tips; + struct commit *commit; + struct oidmap commit2todo = OIDMAP_INIT; + struct string_entry *entry; + struct oidset interesting = OIDSET_INIT, child_seen = OIDSET_INIT, + shown = OIDSET_INIT; + struct label_state state = { OIDMAP_INIT, { NULL }, STRBUF_INIT }; + + int abbr = flags & TODO_LIST_ABBREVIATE_CMDS; + const char *cmd_pick = abbr ? "p" : "pick", + *cmd_label = abbr ? "l" : "label", + *cmd_reset = abbr ? "t" : "reset", + *cmd_merge = abbr ? "m" : "merge"; + + oidmap_init(&commit2todo, 0); + oidmap_init(&state.commit2label, 0); + hashmap_init(&state.labels, (hashmap_cmp_fn) labels_cmp, NULL, 0); + strbuf_init(&state.buf, 32); + + if (revs->cmdline.nr && (revs->cmdline.rev[0].flags & BOTTOM)) { + struct object_id *oid = &revs->cmdline.rev[0].item->oid; + FLEX_ALLOC_STR(entry, string, "onto"); + oidcpy(&entry->entry.oid, oid); + oidmap_put(&state.commit2label, entry); + } + + /* + * First phase: + * - get onelines for all commits + * - gather all branch tips (i.e. 2nd or later parents of merges) + * - label all branch tips + */ + while ((commit = get_revision(revs))) { + struct commit_list *to_merge; + const char *p1, *p2; + struct object_id *oid; + int is_empty; + + tail = &commit_list_insert(commit, tail)->next; + oidset_insert(&interesting, &commit->object.oid); + + is_empty = is_original_commit_empty(commit); + if (!is_empty && (commit->object.flags & PATCHSAME)) + continue; + + strbuf_reset(&oneline); + pretty_print_commit(pp, commit, &oneline); + + to_merge = commit->parents ? commit->parents->next : NULL; + if (!to_merge) { + /* non-merge commit: easy case */ + strbuf_reset(&buf); + if (!keep_empty && is_empty) + strbuf_addf(&buf, "%c ", comment_line_char); + strbuf_addf(&buf, "%s %s %s", cmd_pick, + oid_to_hex(&commit->object.oid), + oneline.buf); + + FLEX_ALLOC_STR(entry, string, buf.buf); + oidcpy(&entry->entry.oid, &commit->object.oid); + oidmap_put(&commit2todo, entry); + + continue; + } + + /* Create a label */ + strbuf_reset(&label); + if (skip_prefix(oneline.buf, "Merge ", &p1) && + (p1 = strchr(p1, '\'')) && + (p2 = strchr(++p1, '\''))) + strbuf_add(&label, p1, p2 - p1); + else if (skip_prefix(oneline.buf, "Merge pull request ", + &p1) && + (p1 = strstr(p1, " from "))) + strbuf_addstr(&label, p1 + strlen(" from ")); + else + strbuf_addbuf(&label, &oneline); + + for (p1 = label.buf; *p1; p1++) + if (isspace(*p1)) + *(char *)p1 = '-'; + + strbuf_reset(&buf); + strbuf_addf(&buf, "%s -C %s", + cmd_merge, oid_to_hex(&commit->object.oid)); + + /* label the tips of merged branches */ + for (; to_merge; to_merge = to_merge->next) { + oid = &to_merge->item->object.oid; + strbuf_addch(&buf, ' '); + + if (!oidset_contains(&interesting, oid)) { + strbuf_addstr(&buf, label_oid(oid, NULL, + &state)); + continue; + } + + tips_tail = &commit_list_insert(to_merge->item, + tips_tail)->next; + + strbuf_addstr(&buf, label_oid(oid, label.buf, &state)); + } + strbuf_addf(&buf, " # %s", oneline.buf); + + FLEX_ALLOC_STR(entry, string, buf.buf); + oidcpy(&entry->entry.oid, &commit->object.oid); + oidmap_put(&commit2todo, entry); + } + + /* + * Second phase: + * - label branch points + * - add HEAD to the branch tips + */ + for (iter = commits; iter; iter = iter->next) { + struct commit_list *parent = iter->item->parents; + for (; parent; parent = parent->next) { + struct object_id *oid = &parent->item->object.oid; + if (!oidset_contains(&interesting, oid)) + continue; + if (!oidset_contains(&child_seen, oid)) + oidset_insert(&child_seen, oid); + else + label_oid(oid, "branch-point", &state); + } + + /* Add HEAD as implict "tip of branch" */ + if (!iter->next) + tips_tail = &commit_list_insert(iter->item, + tips_tail)->next; + } + + /* + * Third phase: output the todo list. This is a bit tricky, as we + * want to avoid jumping back and forth between revisions. To + * accomplish that goal, we walk backwards from the branch tips, + * gathering commits not yet shown, reversing the list on the fly, + * then outputting that list (labeling revisions as needed). + */ + fprintf(out, "%s onto\n", cmd_label); + for (iter = tips; iter; iter = iter->next) { + struct commit_list *list = NULL, *iter2; + + commit = iter->item; + if (oidset_contains(&shown, &commit->object.oid)) + continue; + entry = oidmap_get(&state.commit2label, &commit->object.oid); + + if (entry) + fprintf(out, "\n%c Branch %s\n", comment_line_char, entry->string); + else + fprintf(out, "\n"); + + while (oidset_contains(&interesting, &commit->object.oid) && + !oidset_contains(&shown, &commit->object.oid)) { + commit_list_insert(commit, &list); + if (!commit->parents) { + commit = NULL; + break; + } + commit = commit->parents->item; + } + + if (!commit) + fprintf(out, "%s %s\n", cmd_reset, + rebase_cousins ? "onto" : "[new root]"); + else { + const char *to = NULL; + + entry = oidmap_get(&state.commit2label, + &commit->object.oid); + if (entry) + to = entry->string; + else if (!rebase_cousins) + to = label_oid(&commit->object.oid, NULL, + &state); + + if (!to || !strcmp(to, "onto")) + fprintf(out, "%s onto\n", cmd_reset); + else { + strbuf_reset(&oneline); + pretty_print_commit(pp, commit, &oneline); + fprintf(out, "%s %s # %s\n", + cmd_reset, to, oneline.buf); + } + } + + for (iter2 = list; iter2; iter2 = iter2->next) { + struct object_id *oid = &iter2->item->object.oid; + entry = oidmap_get(&commit2todo, oid); + /* only show if not already upstream */ + if (entry) + fprintf(out, "%s\n", entry->string); + entry = oidmap_get(&state.commit2label, oid); + if (entry) + fprintf(out, "%s %s\n", + cmd_label, entry->string); + oidset_insert(&shown, oid); + } + + free_commit_list(list); + } + + free_commit_list(commits); + free_commit_list(tips); + + strbuf_release(&label); + strbuf_release(&oneline); + strbuf_release(&buf); + + oidmap_free(&commit2todo, 1); + oidmap_free(&state.commit2label, 1); + hashmap_free(&state.labels, 1); + strbuf_release(&state.buf); + + return 0; +} + int sequencer_make_script(FILE *out, int argc, const char **argv, unsigned flags) { @@ -3095,11 +4196,13 @@ int sequencer_make_script(FILE *out, int argc, const char **argv, struct commit *commit; int keep_empty = flags & TODO_LIST_KEEP_EMPTY; const char *insn = flags & TODO_LIST_ABBREVIATE_CMDS ? "p" : "pick"; + int rebase_merges = flags & TODO_LIST_REBASE_MERGES; init_revisions(&revs, NULL); revs.verbose_header = 1; - revs.max_parents = 1; - revs.cherry_pick = 1; + if (!rebase_merges) + revs.max_parents = 1; + revs.cherry_mark = 1; revs.limited = 1; revs.reverse = 1; revs.right_only = 1; @@ -3123,9 +4226,16 @@ int sequencer_make_script(FILE *out, int argc, const char **argv, if (prepare_revision_walk(&revs) < 0) return error(_("make_script: error preparing revisions")); + if (rebase_merges) + return make_script_with_merges(&pp, &revs, out, flags); + while ((commit = get_revision(&revs))) { + int is_empty = is_original_commit_empty(commit); + + if (!is_empty && (commit->object.flags & PATCHSAME)) + continue; strbuf_reset(&buf); - if (!keep_empty && is_original_commit_empty(commit)) + if (!keep_empty && is_empty) strbuf_addf(&buf, "%c ", comment_line_char); strbuf_addf(&buf, "%s %s ", insn, oid_to_hex(&commit->object.oid)); @@ -3145,10 +4255,9 @@ int sequencer_add_exec_commands(const char *commands) { const char *todo_file = rebase_path_todo(); struct todo_list todo_list = TODO_LIST_INIT; - struct todo_item *item; struct strbuf *buf = &todo_list.buf; size_t offset = 0, commands_len = strlen(commands); - int i, first; + int i, insert; if (strbuf_read_file(&todo_list.buf, todo_file, 0) < 0) return error(_("could not read '%s'."), todo_file); @@ -3158,19 +4267,40 @@ int sequencer_add_exec_commands(const char *commands) return error(_("unusable todo list: '%s'"), todo_file); } - first = 1; - /* insert <commands> before every pick except the first one */ - for (item = todo_list.items, i = 0; i < todo_list.nr; i++, item++) { - if (item->command == TODO_PICK && !first) { - strbuf_insert(buf, item->offset_in_buf + offset, - commands, commands_len); + /* + * Insert <commands> after every pick. Here, fixup/squash chains + * are considered part of the pick, so we insert the commands *after* + * those chains if there are any. + */ + insert = -1; + for (i = 0; i < todo_list.nr; i++) { + enum todo_command command = todo_list.items[i].command; + + if (insert >= 0) { + /* skip fixup/squash chains */ + if (command == TODO_COMMENT) + continue; + else if (is_fixup(command)) { + insert = i + 1; + continue; + } + strbuf_insert(buf, + todo_list.items[insert].offset_in_buf + + offset, commands, commands_len); offset += commands_len; + insert = -1; } - first = 0; + + if (command == TODO_PICK || command == TODO_MERGE) + insert = i + 1; } - /* append final <commands> */ - strbuf_add(buf, commands, commands_len); + /* insert or append final <commands> */ + if (insert >= 0 && insert < todo_list.nr) + strbuf_insert(buf, todo_list.items[insert].offset_in_buf + + offset, commands, commands_len); + else if (insert >= 0 || !offset) + strbuf_add(buf, commands, commands_len); i = write_message(buf->buf, buf->len, todo_file, 0); todo_list_release(&todo_list); @@ -3212,8 +4342,16 @@ int transform_todos(unsigned flags) short_commit_name(item->commit) : oid_to_hex(&item->commit->object.oid); + if (item->command == TODO_MERGE) { + if (item->flags & TODO_EDIT_MERGE_MSG) + strbuf_addstr(&buf, " -c"); + else + strbuf_addstr(&buf, " -C"); + } + strbuf_addf(&buf, " %s", oid); } + /* add all the rest */ if (!item->arg_len) strbuf_addch(&buf, '\n'); @@ -3246,6 +4384,7 @@ static enum check_level get_missing_commit_check_level(void) return CHECK_IGNORE; } +define_commit_slab(commit_seen, unsigned char); /* * Check if the user dropped some commits by mistake * Behaviour determined by rebase.missingCommitsCheck. @@ -3259,6 +4398,9 @@ int check_todo_list(void) struct todo_list todo_list = TODO_LIST_INIT; struct strbuf missing = STRBUF_INIT; int advise_to_edit_todo = 0, res = 0, i; + struct commit_seen commit_seen; + + init_commit_seen(&commit_seen); strbuf_addstr(&todo_file, rebase_path_todo()); if (strbuf_read_file_or_whine(&todo_list.buf, todo_file.buf) < 0) { @@ -3275,7 +4417,7 @@ int check_todo_list(void) for (i = 0; i < todo_list.nr; i++) { struct commit *commit = todo_list.items[i].commit; if (commit) - commit->util = (void *)1; + *commit_seen_at(&commit_seen, commit) = 1; } todo_list_release(&todo_list); @@ -3291,11 +4433,11 @@ int check_todo_list(void) for (i = todo_list.nr - 1; i >= 0; i--) { struct todo_item *item = todo_list.items + i; struct commit *commit = item->commit; - if (commit && !commit->util) { + if (commit && !*commit_seen_at(&commit_seen, commit)) { strbuf_addf(&missing, " - %s %.*s\n", short_commit_name(commit), item->arg_len, item->arg); - commit->util = (void *)1; + *commit_seen_at(&commit_seen, commit) = 1; } } @@ -3321,6 +4463,7 @@ int check_todo_list(void) "The possible behaviours are: ignore, warn, error.\n\n")); leave_check: + clear_commit_seen(&commit_seen); strbuf_release(&todo_file); todo_list_release(&todo_list); @@ -3393,8 +4536,7 @@ int skip_unnecessary_picks(void) oid = &item->commit->object.oid; } if (i > 0) { - int offset = i < todo_list.nr ? - todo_list.items[i].offset_in_buf : todo_list.buf.len; + int offset = get_item_line_offset(&todo_list, i); const char *done_path = rebase_path_done(); fd = open(done_path, O_CREAT | O_WRONLY | O_APPEND, 0666); @@ -3442,6 +4584,8 @@ static int subject2item_cmp(const void *fndata, return key ? strcmp(a->subject, key) : strcmp(a->subject, b->subject); } +define_commit_slab(commit_todo_item, struct todo_item *); + /* * Rearrange the todo list that has both "pick commit-id msg" and "pick * commit-id fixup!/squash! msg" in it so that the latter is put immediately @@ -3458,6 +4602,7 @@ int rearrange_squash(void) struct hashmap subject2item; int res = 0, rearranged = 0, *next, *tail, i; char **subjects; + struct commit_todo_item commit_todo; if (strbuf_read_file_or_whine(&todo_list.buf, todo_file) < 0) return -1; @@ -3466,6 +4611,7 @@ int rearrange_squash(void) return -1; } + init_commit_todo_item(&commit_todo); /* * The hashmap maps onelines to the respective todo list index. * @@ -3489,17 +4635,18 @@ int rearrange_squash(void) struct subject2item_entry *entry; next[i] = tail[i] = -1; - if (item->command >= TODO_EXEC) { + if (!item->commit || item->command == TODO_DROP) { subjects[i] = NULL; continue; } if (is_fixup(item->command)) { todo_list_release(&todo_list); + clear_commit_todo_item(&commit_todo); return error(_("the script was already rearranged.")); } - item->commit->util = item; + *commit_todo_item_at(&commit_todo, item->commit) = item; parse_commit(item->commit); commit_buffer = get_commit_buffer(item->commit, NULL); @@ -3526,9 +4673,9 @@ int rearrange_squash(void) else if (!strchr(p, ' ') && (commit2 = lookup_commit_reference_by_name(p)) && - commit2->util) + *commit_todo_item_at(&commit_todo, commit2)) /* found by commit name */ - i2 = (struct todo_item *)commit2->util + i2 = *commit_todo_item_at(&commit_todo, commit2) - todo_list.items; else { /* copy can be a prefix of the commit subject */ @@ -3574,12 +4721,10 @@ int rearrange_squash(void) continue; while (cur >= 0) { - int offset = todo_list.items[cur].offset_in_buf; - int end_offset = cur + 1 < todo_list.nr ? - todo_list.items[cur + 1].offset_in_buf : - todo_list.buf.len; - char *bol = todo_list.buf.buf + offset; - char *eol = todo_list.buf.buf + end_offset; + const char *bol = + get_item_line(&todo_list, cur); + const char *eol = + get_item_line(&todo_list, cur + 1); /* replace 'pick', by 'fixup' or 'squash' */ command = todo_list.items[cur].command; @@ -3607,5 +4752,6 @@ int rearrange_squash(void) hashmap_free(&subject2item, 1); todo_list_release(&todo_list); + clear_commit_todo_item(&commit_todo); return res; } |