diff options
Diffstat (limited to 'sequencer.c')
| -rw-r--r-- | sequencer.c | 1310 |
1 files changed, 1199 insertions, 111 deletions
diff --git a/sequencer.c b/sequencer.c index f9d1001dee..cca968043e 100644 --- a/sequencer.c +++ b/sequencer.c @@ -7,7 +7,7 @@ #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 +23,11 @@ #include "hashmap.h" #include "notes-utils.h" #include "sigchain.h" +#include "unpack-trees.h" +#include "worktree.h" +#include "oidmap.h" +#include "oidset.h" +#include "alias.h" #define GIT_REFLOG_ACTION "GIT_REFLOG_ACTION" @@ -74,13 +79,6 @@ static GIT_PATH_FUNC(rebase_path_message, "rebase-merge/message") * previous commit and from the first squash/fixup commit are written * to it. The commit message for each subsequent squash/fixup commit * is appended to the file as it is processed. - * - * The first line of the file is of the form - * # This is a combination of $count commits. - * where $count is the number of commits whose messages have been - * written to the file so far (including the initial "pick" commit). - * Each time that a commit message is processed, this line is read and - * updated. It is deleted just before the combined commit is made. */ static GIT_PATH_FUNC(rebase_path_squash_msg, "rebase-merge/message-squash") /* @@ -92,6 +90,11 @@ static GIT_PATH_FUNC(rebase_path_squash_msg, "rebase-merge/message-squash") */ static GIT_PATH_FUNC(rebase_path_fixup_msg, "rebase-merge/message-fixup") /* + * This file contains the list fixup/squash commands that have been + * accumulated into message-fixup or message-squash so far. + */ +static GIT_PATH_FUNC(rebase_path_current_fixups, "rebase-merge/current-fixups") +/* * A script to set the GIT_AUTHOR_NAME, GIT_AUTHOR_EMAIL, and * GIT_AUTHOR_DATE that will be used for the commit that is currently * being rebased. @@ -120,6 +123,19 @@ 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). @@ -127,6 +143,7 @@ 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") @@ -244,18 +261,35 @@ 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++) free(opts->xopts[i]); 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; } @@ -282,7 +316,7 @@ 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) @@ -345,12 +379,14 @@ 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); @@ -440,7 +476,8 @@ 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); @@ -499,8 +536,8 @@ 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); @@ -532,9 +569,23 @@ 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)) @@ -553,15 +604,10 @@ 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) @@ -653,6 +699,52 @@ 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=" + }; + char *in, *out, *eol; + int i = 0, len; + + if (strbuf_read_file(buf, rebase_path_author_script(), 256) <= 0) + return NULL; + + /* dequote values and construct ident line in-place */ + for (in = out = 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'; + sq_dequote(in); + len = strlen(in); + + if (i > 0) /* separate values by spaces */ + *(out++) = ' '; + if (i == 1) /* email needs to be surrounded by <...> */ + *(out++) = '<'; + memmove(out, in, len); + out += len; + if (i == 1) /* email needs to be surrounded by <...> */ + *(out++) = '>'; + in = eol + 1; + } + + if (i < 3) { + warning("could not parse '%s' (looking for '%s')", + rebase_path_author_script(), keys[i]); + return NULL; + } + + buf->len = out - buf->buf; + 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" @@ -672,6 +764,7 @@ 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 @@ -691,6 +784,40 @@ 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) { + 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)) { @@ -717,6 +844,8 @@ static int run_git_commit(const char *defmsg, struct replay_opts *opts, argv_array_pushf(&cmd.args, "-S%s", opts->gpg_sign); if (defmsg) argv_array_pushl(&cmd.args, "-F", defmsg, NULL); + else if (!(flags & EDIT_MSG)) + argv_array_pushl(&cmd.args, "-C", "HEAD", NULL); if ((flags & CLEANUP_MSG)) argv_array_push(&cmd.args, "--cleanup=strip"); if ((flags & EDIT_MSG)) @@ -1112,14 +1241,14 @@ 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_cache_as_tree(&tree, 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; } @@ -1148,6 +1277,8 @@ 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")); @@ -1177,7 +1308,8 @@ 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; @@ -1216,12 +1348,12 @@ 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)); } /* @@ -1277,6 +1409,9 @@ 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, @@ -1295,6 +1430,9 @@ static struct { { 'f', "fixup" }, { 's', "squash" }, { 'x', "exec" }, + { 'l', "label" }, + { 't', "reset" }, + { 'm', "merge" }, { 0, "noop" }, { 'd', "drop" }, { 0, NULL } @@ -1324,38 +1462,43 @@ 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) { struct strbuf buf = STRBUF_INIT; - int count, res; + int res; const char *message, *body; - if (file_exists(rebase_path_squash_msg())) { + if (opts->current_fixup_count > 0) { struct strbuf header = STRBUF_INIT; - char *eol, *p; + char *eol; - if (strbuf_read_file(&buf, rebase_path_squash_msg(), 2048) <= 0) + if (strbuf_read_file(&buf, rebase_path_squash_msg(), 9) <= 0) return error(_("could not read '%s'"), rebase_path_squash_msg()); - p = buf.buf + 1; - eol = strchrnul(buf.buf, '\n'); - if (buf.buf[0] != comment_line_char || - (p += strcspn(p, "0123456789\n")) == eol) - return error(_("unexpected 1st line of squash message:" - "\n\n\t%.*s"), - (int)(eol - buf.buf), buf.buf); - count = strtol(p, NULL, 10); - - if (count < 1) - return error(_("invalid 1st line of squash message:\n" - "\n\t%.*s"), - (int)(eol - buf.buf), buf.buf); + eol = buf.buf[0] != comment_line_char ? + buf.buf : strchrnul(buf.buf, '\n'); strbuf_addf(&header, "%c ", comment_line_char); - strbuf_addf(&header, - _("This is a combination of %d commits."), ++count); + strbuf_addf(&header, _("This is a combination of %d commits."), + opts->current_fixup_count + 2); strbuf_splice(&buf, 0, eol - buf.buf, header.buf, header.len); strbuf_release(&header); } else { @@ -1378,10 +1521,8 @@ static int update_squash_messages(enum todo_command command, rebase_path_fixup_msg()); } - count = 2; strbuf_addf(&buf, "%c ", comment_line_char); - strbuf_addf(&buf, _("This is a combination of %d commits."), - count); + strbuf_addf(&buf, _("This is a combination of %d commits."), 2); strbuf_addf(&buf, "\n%c ", comment_line_char); strbuf_addstr(&buf, _("This is the 1st commit message:")); strbuf_addstr(&buf, "\n\n"); @@ -1398,13 +1539,14 @@ static int update_squash_messages(enum todo_command command, if (command == TODO_SQUASH) { unlink(rebase_path_fixup_msg()); strbuf_addf(&buf, "\n%c ", comment_line_char); - strbuf_addf(&buf, _("This is the commit message #%d:"), count); + strbuf_addf(&buf, _("This is the commit message #%d:"), + ++opts->current_fixup_count); strbuf_addstr(&buf, "\n\n"); strbuf_addstr(&buf, body); } else if (command == TODO_FIXUP) { strbuf_addf(&buf, "\n%c ", comment_line_char); strbuf_addf(&buf, _("The commit message #%d will be skipped:"), - count); + ++opts->current_fixup_count); strbuf_addstr(&buf, "\n\n"); strbuf_add_commented_lines(&buf, body, strlen(body)); } else @@ -1413,6 +1555,17 @@ static int update_squash_messages(enum todo_command command, res = write_message(buf.buf, buf.len, rebase_path_squash_msg(), 0); strbuf_release(&buf); + + if (!res) { + strbuf_addf(&opts->current_fixups, "%s%s %s", + opts->current_fixups.len ? "\n" : "", + command_to_string(command), + oid_to_hex(&commit->object.oid)); + res = write_message(opts->current_fixups.buf, + opts->current_fixups.len, + rebase_path_current_fixups(), 0); + } + return res; } @@ -1474,13 +1627,20 @@ 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_cache_as_tree(&head, 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); } @@ -1604,7 +1764,7 @@ static int do_pick_commit(enum todo_command command, struct commit *commit, } } - 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) @@ -1675,6 +1835,9 @@ fast_forward_edit: if (!res && final_fixup) { unlink(rebase_path_fixup_msg()); unlink(rebase_path_squash_msg()); + unlink(rebase_path_current_fixups()); + strbuf_reset(&opts->current_fixups); + opts->current_fixup_count = 0; } leave: @@ -1722,9 +1885,14 @@ 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; @@ -1759,6 +1927,8 @@ 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"); @@ -1800,13 +1970,29 @@ 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'; @@ -1868,6 +2054,23 @@ 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; @@ -2043,9 +2246,30 @@ 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); + if (read_oneliner(&opts->current_fixups, + rebase_path_current_fixups(), 1)) { + const char *p = opts->current_fixups.buf; + opts->current_fixup_count = 1; + while ((p = strchr(p, '\n'))) { + opts->current_fixup_count++; + p++; + } + } + + 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; } @@ -2119,9 +2343,9 @@ 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()); @@ -2242,29 +2466,27 @@ 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; } @@ -2392,10 +2614,9 @@ static int error_with_patch(struct commit *commit, static int error_failed_squash(struct commit *commit, struct replay_opts *opts, int subject_len, const char *subject) { - if (rename(rebase_path_squash_msg(), rebase_path_message())) - return error(_("could not rename '%s' to '%s'"), + 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(rebase_path_fixup_msg()); unlink(git_path_merge_msg()); if (copy_file(git_path_merge_msg(), rebase_path_message(), 0666)) return error(_("could not copy '%s' to '%s'"), @@ -2448,6 +2669,377 @@ 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 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 merge_options o; + int merge_arg_len, oneline_offset, can_fast_forward, ret; + 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; + } + + oneline_offset = arg_len; + merge_arg_len = strcspn(arg, " \t\n"); + p = arg + merge_arg_len; + p += strspn(p, " \t\n"); + if (*p == '#' && (!p[1] || isspace(p[1]))) { + p += 1 + strspn(p + 1, " \t\n"); + oneline_offset = p - arg; + } else if (p - arg < arg_len) + BUG("octopus merges are not supported yet: '%s'", p); + + strbuf_addf(&ref_name, "refs/rewritten/%.*s", merge_arg_len, arg); + merge_commit = lookup_commit_reference_by_name(ref_name.buf); + if (!merge_commit) { + /* fall back to non-rewritten ref or commit */ + strbuf_splice(&ref_name, 0, strlen("refs/rewritten/"), "", 0); + merge_commit = lookup_commit_reference_by_name(ref_name.buf); + } + + if (!merge_commit) { + ret = error(_("could not resolve '%s'"), ref_name.buf); + 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); + ret = fast_forward_to(&merge_commit->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(), 0); + unuse_commit_buffer(commit, message); + if (ret) { + error_errno(_("could not write '%s'"), + git_path_merge_msg()); + 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 branch '%.*s'", + merge_arg_len, arg); + p = buf.buf; + len = buf.len; + } + + ret = write_message(p, len, git_path_merge_msg(), 0); + strbuf_release(&buf); + if (ret) { + error_errno(_("could not write '%s'"), + git_path_merge_msg()); + 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 the merge head is different from the original one, we cannot + * fast-forward. + */ + if (can_fast_forward) { + struct commit_list *second_parent = commit->parents->next; + + if (second_parent && !second_parent->next && + oidcmp(&merge_commit->object.oid, + &second_parent->item->object.oid)) + can_fast_forward = 0; + } + + if (can_fast_forward && commit->parents->next && + !commit->parents->next->next && + !oidcmp(&commit->parents->next->item->object.oid, + &merge_commit->object.oid)) { + rollback_lock_file(&lock); + ret = fast_forward_to(&commit->object.oid, + &head_commit->object.oid, 0, opts); + goto leave_merge; + } + + write_message(oid_to_hex(&merge_commit->object.oid), GIT_SHA1_HEXSZ, + git_path_merge_head(), 0); + write_message("no-ff", 5, git_path_merge_mode(), 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(), opts, + run_commit_flags); + +leave_merge: + strbuf_release(&ref_name); + rollback_lock_file(&lock); + return ret; +} + static int is_final_fixup(struct todo_list *todo_list) { int i = todo_list->current; @@ -2538,9 +3130,20 @@ 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) @@ -2583,6 +3186,11 @@ 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; @@ -2606,7 +3214,7 @@ 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) return res | error_with_patch(item->commit, item->arg, item->arg_len, opts, res, item->command == TODO_REWORD); @@ -2632,9 +3240,44 @@ 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; @@ -2761,19 +3404,16 @@ static int continue_single_pick(void) return run_command_v_opt(argv, RUN_GIT_CMD); } -static int commit_staged_changes(struct replay_opts *opts) +static int commit_staged_changes(struct replay_opts *opts, + struct todo_list *todo_list) { unsigned int flags = ALLOW_EMPTY | EDIT_MSG; + unsigned int final_fixup = 0, is_clean; if (has_unstaged_changes(1)) return error(_("cannot rebase: You have unstaged changes.")); - if (!has_uncommitted_changes(0)) { - const char *cherry_pick_head = git_path_cherry_pick_head(); - if (file_exists(cherry_pick_head) && unlink(cherry_pick_head)) - return error(_("could not remove CHERRY_PICK_HEAD")); - return 0; - } + is_clean = !has_uncommitted_changes(0); if (file_exists(rebase_path_amend())) { struct strbuf rev = STRBUF_INIT; @@ -2786,19 +3426,107 @@ static int commit_staged_changes(struct replay_opts *opts) if (get_oid_hex(rev.buf, &to_amend)) return error(_("invalid contents: '%s'"), rebase_path_amend()); - if (oidcmp(&head, &to_amend)) + if (!is_clean && oidcmp(&head, &to_amend)) return error(_("\nYou have uncommitted changes in your " "working tree. Please, commit them\n" "first and then run 'git rebase " "--continue' again.")); + /* + * When skipping a failed fixup/squash, we need to edit the + * commit message, the current fixup list and count, and if it + * was the last fixup/squash in the chain, we need to clean up + * the commit message and if there was a squash, let the user + * edit it. + */ + if (is_clean && !oidcmp(&head, &to_amend) && + opts->current_fixup_count > 0 && + file_exists(rebase_path_stopped_sha())) { + const char *p = opts->current_fixups.buf; + int len = opts->current_fixups.len; + + opts->current_fixup_count--; + if (!len) + BUG("Incorrect current_fixups:\n%s", p); + while (len && p[len - 1] != '\n') + len--; + strbuf_setlen(&opts->current_fixups, len); + if (write_message(p, len, rebase_path_current_fixups(), + 0) < 0) + return error(_("could not write file: '%s'"), + rebase_path_current_fixups()); + + /* + * If a fixup/squash in a fixup/squash chain failed, the + * commit message is already correct, no need to commit + * it again. + * + * Only if it is the final command in the fixup/squash + * chain, and only if the chain is longer than a single + * fixup/squash command (which was just skipped), do we + * actually need to re-commit with a cleaned up commit + * message. + */ + if (opts->current_fixup_count > 0 && + !is_fixup(peek_command(todo_list, 0))) { + final_fixup = 1; + /* + * If there was not a single "squash" in the + * chain, we only need to clean up the commit + * message, no need to bother the user with + * opening the commit message in the editor. + */ + if (!starts_with(p, "squash ") && + !strstr(p, "\nsquash ")) + flags = (flags & ~EDIT_MSG) | CLEANUP_MSG; + } else if (is_fixup(peek_command(todo_list, 0))) { + /* + * We need to update the squash message to skip + * the latest commit message. + */ + struct commit *commit; + const char *path = rebase_path_squash_msg(); + + if (parse_head(&commit) || + !(p = get_commit_buffer(commit, NULL)) || + write_message(p, strlen(p), path, 0)) { + unuse_commit_buffer(commit, p); + return error(_("could not write file: " + "'%s'"), path); + } + unuse_commit_buffer(commit, p); + } + } strbuf_release(&rev); flags |= AMEND_MSG; } - if (run_git_commit(rebase_path_message(), opts, flags)) + if (is_clean) { + const char *cherry_pick_head = git_path_cherry_pick_head(); + + if (file_exists(cherry_pick_head) && unlink(cherry_pick_head)) + return error(_("could not remove CHERRY_PICK_HEAD")); + if (!final_fixup) + return 0; + } + + if (run_git_commit(final_fixup ? NULL : rebase_path_message(), + opts, flags)) return error(_("could not commit staged changes.")); unlink(rebase_path_amend()); + if (final_fixup) { + unlink(rebase_path_fixup_msg()); + unlink(rebase_path_squash_msg()); + } + if (opts->current_fixup_count > 0) { + /* + * Whether final fixup or not, we just cleaned up the commit + * message... + */ + unlink(rebase_path_current_fixups()); + strbuf_reset(&opts->current_fixups); + opts->current_fixup_count = 0; + } return 0; } @@ -2810,14 +3538,16 @@ int sequencer_continue(struct replay_opts *opts) if (read_and_refresh_cache(opts)) return -1; + if (read_populate_opts(opts)) + return -1; if (is_rebase_i(opts)) { - if (commit_staged_changes(opts)) + if ((res = read_populate_todo(&todo_list, opts))) + goto release_todo_list; + if (commit_staged_changes(opts, &todo_list)) return -1; } else if (!file_exists(get_todo_path(opts))) return continue_single_pick(); - if (read_populate_opts(opts)) - return -1; - if ((res = read_populate_todo(&todo_list, opts))) + else if ((res = read_populate_todo(&todo_list, opts))) goto release_todo_list; if (!is_rebase_i(opts)) { @@ -2876,7 +3606,9 @@ int sequencer_pick_revisions(struct replay_opts *opts) if (!get_oid(name, &oid)) { if (!lookup_commit_reference_gently(&oid, 1)) { - enum object_type type = sha1_object_info(oid.hash, NULL); + enum object_type type = oid_object_info(the_repository, + &oid, + NULL); return error(_("%s: can't cherry-pick a %s"), name, type_name(type)); } @@ -2986,6 +3718,348 @@ 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; + int is_octopus; + 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; + } + + is_octopus = to_merge && to_merge->next; + + if (is_octopus) + BUG("Octopus merges not yet supported"); + + /* 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 tip of merged branch */ + oid = &to_merge->item->object.oid; + strbuf_addch(&buf, ' '); + + if (!oidset_contains(&interesting, oid)) + strbuf_addstr(&buf, label_oid(oid, NULL, &state)); + else { + 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# Branch %s\n", 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) { @@ -2996,11 +4070,13 @@ 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; @@ -3024,9 +4100,16 @@ 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)); @@ -3113,8 +4196,16 @@ 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'); @@ -3294,8 +4385,7 @@ 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); @@ -3390,7 +4480,7 @@ 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; } @@ -3475,12 +4565,10 @@ 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; |