[PATCH v6 08/16] sequencer: refactor rearrange_squash() to work on a todo_list
- From
Alban Gruin <alban.gruin@gmail.com>
- Date
- Jan 29, 2019, 15:01 UTC
- Message-ID
- <20190129150159.10588-9-alban.gruin@gmail.com>
- In-Reply-To
- <20190129150159.10588-1-alban.gruin@gmail.com>
This refactors rearrange_squash() to work on a todo_list to avoid redundant reads and writes. The function is renamed todo_list_rearrange_squash().
The old version created a new buffer, which was directly written to the disk. This new version creates a new item list by just copying items from the old item list, without creating a new buffer. This eliminates the need to reparse the todo list, but this also means its buffer cannot be directly written to the disk.
As rebase -p still need to check the todo list from the disk, a new function is introduced, rearrange_squash_in_todo_file().
complete_action() still uses rearrange_squash_in_todo_file() for now. This will be changed in a future commit.
Signed-off-by: Alban Gruin <alban.gruin@gmail.com> --- builtin/rebase--interactive.c | 2 +- sequencer.c | 92 ++++++++++++++++++----------------- sequencer.h | 2 +- 3 files changed, 49 insertions(+), 47 deletions(-)
diff --git a/builtin/rebase--interactive.c b/builtin/rebase--interactive.c index 53056ee713..4f0eae9239 100644 --- a/builtin/rebase--interactive.c +++ b/builtin/rebase--interactive.c @@ -266,7 +266,7 @@ int cmd_rebase__interactive(int argc, const char **argv, const char *prefix) ret = check_todo_list_from_file(the_repository); break; case REARRANGE_SQUASH: - ret = rearrange_squash(the_repository); + ret = rearrange_squash_in_todo_file(the_repository); break; case ADD_EXEC: ret = sequencer_add_exec_commands(the_repository, &commands); diff --git a/sequencer.c b/sequencer.c index 3a90b419d7..11456be5cc 100644 --- a/sequencer.c +++ b/sequencer.c @@ -4777,7 +4777,7 @@ int complete_action(struct repository *r, struct replay_opts *opts, unsigned fla write_message("noop\n", 5, todo_file, 0)) return -1; - if (autosquash && rearrange_squash(r)) + if (autosquash && rearrange_squash_in_todo_file(r)) return -1; if (commands->nr) @@ -4883,21 +4883,13 @@ define_commit_slab(commit_todo_item, struct todo_item *); * message will have to be retrieved from the commit (as the oneline in the * script cannot be trusted) in order to normalize the autosquash arrangement. */ -int rearrange_squash(struct repository *r) +static int todo_list_rearrange_squash(struct todo_list *todo_list) { - const char *todo_file = rebase_path_todo(); - struct todo_list todo_list = TODO_LIST_INIT; struct hashmap subject2item; - int res = 0, rearranged = 0, *next, *tail, i; + int rearranged = 0, *next, *tail, i, nr = 0, alloc = 0; char **subjects; struct commit_todo_item commit_todo; - - if (strbuf_read_file_or_whine(&todo_list.buf, todo_file) < 0) - return -1; - if (todo_list_parse_insn_buffer(r, todo_list.buf.buf, &todo_list) < 0) { - todo_list_release(&todo_list); - return -1; - } + struct todo_item *items = NULL; init_commit_todo_item(&commit_todo); /* @@ -4910,13 +4902,13 @@ int rearrange_squash(struct repository *r) * be moved to appear after the i'th. */ hashmap_init(&subject2item, (hashmap_cmp_fn) subject2item_cmp, - NULL, todo_list.nr); - ALLOC_ARRAY(next, todo_list.nr); - ALLOC_ARRAY(tail, todo_list.nr); - ALLOC_ARRAY(subjects, todo_list.nr); - for (i = 0; i < todo_list.nr; i++) { + NULL, todo_list->nr); + ALLOC_ARRAY(next, todo_list->nr); + ALLOC_ARRAY(tail, todo_list->nr); + ALLOC_ARRAY(subjects, todo_list->nr); + for (i = 0; i < todo_list->nr; i++) { struct strbuf buf = STRBUF_INIT; - struct todo_item *item = todo_list.items + i; + struct todo_item *item = todo_list->items + i; const char *commit_buffer, *subject, *p; size_t subject_len; int i2 = -1; @@ -4929,7 +4921,6 @@ int rearrange_squash(struct repository *r) } if (is_fixup(item->command)) { - todo_list_release(&todo_list); clear_commit_todo_item(&commit_todo); return error(_("the script was already rearranged.")); } @@ -4964,7 +4955,7 @@ int rearrange_squash(struct repository *r) *commit_todo_item_at(&commit_todo, commit2)) /* found by commit name */ i2 = *commit_todo_item_at(&commit_todo, commit2) - - todo_list.items; + - todo_list->items; else { /* copy can be a prefix of the commit subject */ for (i2 = 0; i2 < i; i2++) @@ -4977,7 +4968,7 @@ int rearrange_squash(struct repository *r) } if (i2 >= 0) { rearranged = 1; - todo_list.items[i].command = + todo_list->items[i].command = starts_with(subject, "fixup!") ? TODO_FIXUP : TODO_SQUASH; if (next[i2] < 0) @@ -4995,10 +4986,8 @@ int rearrange_squash(struct repository *r) } if (rearranged) { - struct strbuf buf = STRBUF_INIT; - - for (i = 0; i < todo_list.nr; i++) { - enum todo_command command = todo_list.items[i].command; + for (i = 0; i < todo_list->nr; i++) { + enum todo_command command = todo_list->items[i].command; int cur = i; /* @@ -5009,37 +4998,50 @@ int rearrange_squash(struct repository *r) continue; while (cur >= 0) { - 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; - if (is_fixup(command)) { - strbuf_addstr(&buf, - todo_command_info[command].str); - bol += strcspn(bol, " \t"); - } - - strbuf_add(&buf, bol, eol - bol); - + ALLOC_GROW(items, nr + 1, alloc); + items[nr++] = todo_list->items[cur]; cur = next[cur]; } } - res = rewrite_file(todo_file, buf.buf, buf.len); - strbuf_release(&buf); + FREE_AND_NULL(todo_list->items); + todo_list->items = items; + todo_list->nr = nr; + todo_list->alloc = alloc; } free(next); free(tail); - for (i = 0; i < todo_list.nr; i++) + for (i = 0; i < todo_list->nr; i++) free(subjects[i]); free(subjects); hashmap_free(&subject2item, 1); - todo_list_release(&todo_list); clear_commit_todo_item(&commit_todo); - return res; + + return 0; +} + +int rearrange_squash_in_todo_file(struct repository *r) +{ + const char *todo_file = rebase_path_todo(); + struct todo_list todo_list = TODO_LIST_INIT; + int res = 0; + + if (strbuf_read_file_or_whine(&todo_list.buf, todo_file) < 0) + return -1; + if (todo_list_parse_insn_buffer(r, todo_list.buf.buf, &todo_list) < 0) { + todo_list_release(&todo_list); + return -1; + } + + res = todo_list_rearrange_squash(&todo_list); + if (!res) + res = todo_list_write_to_file(r, &todo_list, todo_file, NULL, NULL, -1, 0); + + todo_list_release(&todo_list); + + if (res) + return error_errno(_("could not write '%s'."), todo_file); + return 0; } diff --git a/sequencer.h b/sequencer.h index e79f03e213..c7bb38d6df 100644 --- a/sequencer.h +++ b/sequencer.h @@ -154,7 +154,7 @@ int complete_action(struct repository *r, struct replay_opts *opts, unsigned fla const char *shortrevisions, const char *onto_name, const char *onto, const char *orig_head, struct string_list *commands, unsigned autosquash); -int rearrange_squash(struct repository *r); +int rearrange_squash_in_todo_file(struct repository *r); extern const char sign_off_header[];
-- 2.20.1