Brandon Williams <bmw...@google.com> writes:

>  static void show_ce_entry(const char *tag, const struct cache_entry *ce)
>  {
> +     struct strbuf name = STRBUF_INIT;
>       int len = max_prefix_len;
> +     if (submodule_prefix)
> +             strbuf_addstr(&name, submodule_prefix);
> +     strbuf_addstr(&name, ce->name);

Continuing with the previous review, which concentrated on what
happens in the superproject; let's see what happens in the recursive
invocation in a submodule.

So a recursively spawned "ls-files --submodule-prefix=sub/" finds
a path in the index PATH and forms "sub/PATH" in "name".  From here
on, where we used to match pathspec against ce->name, we would be
matching it against name->buf.

> +     if (recurse_submodules && S_ISGITLINK(ce->ce_mode) &&
> +         submodule_path_match(&pathspec, name.buf, ps_matched)) {
>               show_gitlink(ce);

This is primarily what happens in the superproject to decide if the
submodule is worth showing.  When we are in a submodule, we can
descend into subsubmodule (if our ls-files run in the superproject
passed --recurse-submodule down) from here.

> +     } else if (match_pathspec(&pathspec, name.buf, name.len,
> +                               len, ps_matched,
> +                               S_ISDIR(ce->ce_mode) ||
> +                               S_ISGITLINK(ce->ce_mode))) {

This is interesting bit to see what happens in the recursive
invocation.  It uses the usual match_pathspec(), as we want to be
precise and correct, iow, we do not want to use DO_MATCH_SUBMODULE,
aka "it might be worth descending into submodule".

> +             if (tag && *tag && show_valid_bit &&
> +                 (ce->ce_flags & CE_VALID)) {
> +...
> +             }
> +             write_eolinfo(ce, ce->name);
> +             write_name(ce->name);

The prefixing is taken care of by write_name(), so it is correct to
use ce->name here.

> ...  
> +     strbuf_release(&name);
>  }

OK, everything I saw so far for the recursive invocation here makes
sense.

Thanks.

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