On 30/11/2018 19:06, Johannes Schindelin wrote:
Hi,

On Fri, 30 Nov 2018, Phillip Wood wrote:

diff --git a/sequencer.c b/sequencer.c
index 900899ef20..11692d0b98 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -4394,24 +4394,29 @@ int sequencer_make_script(FILE *out, int argc, const
char **argv,
        return 0;
  }
-/*
- * Add commands after pick and (series of) squash/fixup commands
- * in the todo list.
- */
-int sequencer_add_exec_commands(const char *commands)
+static void todo_list_add_exec_commands(struct todo_list *todo_list,
+                                       struct string_list *commands)
{
-       const char *todo_file = rebase_path_todo();
-       struct todo_list todo_list = TODO_LIST_INIT;
-       struct strbuf *buf = &todo_list.buf;
-       size_t offset = 0, commands_len = strlen(commands);
-       int i, insert;
+       struct strbuf *buf = &todo_list->buf;
+       const char *old_buf = buf->buf;
+       size_t base_length = buf->len;
+       int i, insert, nr = 0, alloc = 0;
+       struct todo_item *items = NULL, *base_items = NULL;

-       if (strbuf_read_file(&todo_list.buf, todo_file, 0) < 0)
-               return error(_("could not read '%s'."), todo_file);
+       for (i = 0; i < commands->nr; ++i) {
+               strbuf_addstr(buf, commands->items[i].string);
+               strbuf_addch(buf, '\n');
+       }

This could cause buf->buf to be reallocated in which case all the
todo_list_item.arg pointers will be invalidated.

I guess it is a good time for me to admit that the `arg` idea was not my
best. Maybe it would be good to convert that from a pointer to an offset,
e.g. `size_t arg_offset_in_buf;`? Or maybe we should just drop the
`_in_buf` suffix and clarify in a comment next to the declaration of the
fields that they are offsets in the strbuf?

I think that sounds sensible (though I haven't looked at how much work it would be), having a comment and calling it arg_offset would be my preference.

Best Wishes

Phillip

Ciao,
Dscho


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