Brandon Williams <bmw...@google.com> writes:
> The 'submodule.update' config was historically used and respected by the
> 'submodule update' command because update handled a variety of different
> ways it updated a submodule. As we begin teaching other commands about
> submodules it makes more sense for the different settings of
> 'submodule.update' to be handled by the individual commands themselves
> (checkout, rebase, merge, etc) so it shouldn't be respected by the
> native checkout command.
Soooo... what's the externally observable effect of this change? Is
it something that can be illustrated in a set of new tests?
IOW does this commit by itself want to change the behaviour of
"submodule update" and existing (indirect) users of unpack-trees?
Or does it want to keep the documented behaviour of "submodule
update" while correcting unintended triggering in other (indirect)
users of unpack-trees of the same machinery that is being removed in
this patch?
> - switch (sub->update_strategy.type) {
> - case SM_UPDATE_UNSPECIFIED:
> - case SM_UPDATE_CHECKOUT:
> - if (submodule_move_head(ce->name, old_id, new_id, flags))
> - return o->gently ? -1 :
> - add_rejected_path(o,
> ERROR_WOULD_LOSE_SUBMODULE, ce->name);
> - return 0;
> - case SM_UPDATE_NONE:
> - return 0;
> - case SM_UPDATE_REBASE:
> - case SM_UPDATE_MERGE:
> - case SM_UPDATE_COMMAND:
> - default:
> - warning(_("submodule update strategy not supported for
> submodule '%s'"), ce->name);
> - return -1;
> - }
> + if (submodule_move_head(ce->name, old_id, new_id, flags))
> + return o->gently ? -1 :
> + add_rejected_path(o,
> ERROR_WOULD_LOSE_SUBMODULE, ce->name);
> + return 0;
With this update, we always behave as if update_strategy.type were
either left unspecified or explicitly set to checkout. Other arms
in this switch (and the other switch too), especially "none", were
not expecting a call to submodule_move_head() to be made, but now
the call is unconditional.
> }
>
> static void reload_gitmodules_file(struct index_state *index,
> @@ -293,7 +282,6 @@ static void reload_gitmodules_file(struct index_state
> *index,
> submodule_free();
> checkout_entry(ce, state, NULL);
> gitmodules_config();
> - git_config(submodule_config, NULL);
> } else
> break;
> }
> @@ -308,19 +296,9 @@ static void unlink_entry(const struct cache_entry *ce)
> {
> const struct submodule *sub = submodule_from_ce(ce);
> if (sub) {
> - switch (sub->update_strategy.type) {
> - case SM_UPDATE_UNSPECIFIED:
> - case SM_UPDATE_CHECKOUT:
> - case SM_UPDATE_REBASE:
> - case SM_UPDATE_MERGE:
> - /* state.force is set at the caller. */
> - submodule_move_head(ce->name, "HEAD", NULL,
> - SUBMODULE_MOVE_HEAD_FORCE);
> - break;
> - case SM_UPDATE_NONE:
> - case SM_UPDATE_COMMAND:
> - return; /* Do not touch the submodule. */
> - }
> + /* state.force is set at the caller. */
> + submodule_move_head(ce->name, "HEAD", NULL,
> + SUBMODULE_MOVE_HEAD_FORCE);
> }
> if (!check_leading_path(ce->name, ce_namelen(ce)))
> return;
