From 1ace63bc39a339a1616477644d6c43f570716bcb Mon Sep 17 00:00:00 2001 From: Johannes Schindelin Date: Thu, 9 Aug 2018 02:41:11 -0700 Subject: rebase --exec: make it work with --rebase-merges The idea of `--exec` is to append an `exec` call after each `pick`. Since the introduction of fixup!/squash! commits, this idea was extended to apply to "pick, possibly followed by a fixup/squash chain", i.e. an exec would not be inserted between a `pick` and any of its corresponding `fixup` or `squash` lines. The current implementation uses a dirty trick to achieve that: it assumes that there are only pick/fixup/squash commands, and then *inserts* the `exec` lines before any `pick` but the first, and appends a final one. With the todo lists generated by `git rebase --rebase-merges`, this simple implementation shows its problems: it produces the exact wrong thing when there are `label`, `reset` and `merge` commands. Let's change the implementation to do exactly what we want: look for `pick` lines, skip any fixup/squash chains, and then insert the `exec` line. Lather, rinse, repeat. Note: we take pains to insert *before* comment lines whenever possible, as empty commits are represented by commented-out pick lines (and we want to insert a preceding pick's exec line *before* such a line, not afterward). While at it, also add `exec` lines after `merge` commands, because they are similar in spirit to `pick` commands: they add new commits. Signed-off-by: Johannes Schindelin Signed-off-by: Junio C Hamano --- sequencer.c | 42 +++++++++++++++++++++++++++++++----------- t/t3430-rebase-merges.sh | 2 +- 2 files changed, 32 insertions(+), 12 deletions(-) diff --git a/sequencer.c b/sequencer.c index 31038472fd..278d34ce9d 100644 --- a/sequencer.c +++ b/sequencer.c @@ -4244,10 +4244,9 @@ 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); @@ -4257,19 +4256,40 @@ int sequencer_add_exec_commands(const char *commands) return error(_("unusable todo list: '%s'"), todo_file); } - first = 1; - /* insert 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 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 */ - strbuf_add(buf, commands, commands_len); + /* insert or append final */ + 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); diff --git a/t/t3430-rebase-merges.sh b/t/t3430-rebase-merges.sh index 0bf5eaa376..90ae613e23 100755 --- a/t/t3430-rebase-merges.sh +++ b/t/t3430-rebase-merges.sh @@ -363,7 +363,7 @@ test_expect_success 'octopus merges' ' EOF ' -test_expect_failure 'with --autosquash and --exec' ' +test_expect_success 'with --autosquash and --exec' ' git checkout -b with-exec H && echo Booh >B.t && test_tick && -- cgit v1.2.3