"Heather Lapointe via GitGitGadget" <gitgitgadget@xxxxxxxxx> writes:
> @@ -47,40 +48,73 @@ int read_tree_at(struct repository *r,
> return -1;
> }
>
> - if (S_ISDIR(entry.mode))
> + if (S_ISDIR(entry.mode)) {
> oidcpy(&oid, &entry.oid);
> - else if (S_ISGITLINK(entry.mode)) {
> - struct commit *commit;
>
> - commit = lookup_commit(r, &entry.oid);
> + len = tree_entry_len(&entry);
> + strbuf_add(base, entry.path, len);
> + strbuf_addch(base, '/');
> + retval = read_tree_at(r, lookup_tree(r, &oid),
> + base, pathspec,
> + fn, context);
> + strbuf_setlen(base, oldlen);
> + if (retval)
> + return -1;
> + } else if (pathspec->recurse_submodules && S_ISGITLINK(entry.mode)) {
> + struct commit *commit;
> + struct repository subrepo;
> + struct repository* subrepo_p = &subrepo;
> + struct tree* submodule_tree;
> + char *submodule_rel_path;
> + int name_base_len = 0;
> +
> + len = tree_entry_len(&entry);
> + strbuf_add(base, entry.path, len);
> + submodule_rel_path = base->buf;
> + // repo_submodule_init expects a path relative to submodule_prefix
> + if (r->submodule_prefix) {
> + name_base_len = strlen(r->submodule_prefix);
> + // we should always expect to start with submodule_prefix
> + assert(!strncmp(submodule_rel_path, r->submodule_prefix, name_base_len));
> + // strip the prefix
> + submodule_rel_path += name_base_len;
> + // if submodule_prefix doesn't end with a /, we want to get rid of that too
> + if (is_dir_sep(submodule_rel_path[0])) {
> + submodule_rel_path++;
> + }
> + }
> +
> + if (repo_submodule_init(subrepo_p, r, submodule_rel_path, null_oid()))
> + die("couldn't init submodule %s", base->buf);
> +
> + if (repo_read_index(subrepo_p) < 0)
> + die("index file corrupt");
> +
> + commit = lookup_commit(subrepo_p, &entry.oid);
> if (!commit)
> - die("Commit %s in submodule path %s%s not found",
> + die("Commit %s in submodule path %s not found",
> oid_to_hex(&entry.oid),
> - base->buf, entry.path);
> -
> - // FIXME: This is the wrong repo instance (it refers to the superproject)
> - // it will always fail as is (will fix in later patch)
> - // This current codepath isn't executed by any existing callbacks
> - // so it wouldn't show up as an issue at this time.
> - if (repo_parse_commit(r, commit))
> - die("Invalid commit %s in submodule path %s%s",
> + base->buf);
> +
> + if (repo_parse_commit(subrepo_p, commit))
> + die("Invalid commit %s in submodule path %s",
> oid_to_hex(&entry.oid),
> - base->buf, entry.path);
> + base->buf);
>
> - oidcpy(&oid, get_commit_tree_oid(commit));
> - }
> - else
> - continue;
> + submodule_tree = repo_get_commit_tree(subrepo_p, commit);
> + oidcpy(&oid, submodule_tree ? &submodule_tree->object.oid : NULL);
>
> - len = tree_entry_len(&entry);
> - strbuf_add(base, entry.path, len);
> - strbuf_addch(base, '/');
> - retval = read_tree_at(r, lookup_tree(r, &oid),
> - base, pathspec,
> - fn, context);
> - strbuf_setlen(base, oldlen);
> - if (retval)
> - return -1;
> + strbuf_addch(base, '/');
> +
> + retval = read_tree_at(subrepo_p, lookup_tree(subrepo_p, &oid),
> + base, pathspec,
> + fn, context);
> + if (retval)
> + die("failed to read tree for %s", base->buf);
> + strbuf_setlen(base, oldlen);
> + repo_clear(subrepo_p);
> + }
> + // else, this is a file (or a submodule, but no pathspec->recurse_submodules)
In this patch, we say that we can ignore a submodule when
pathspec->recurse_submodules is 0, but unless I'm missing something, I
don't think that's the case. The preimage is:
else if (S_ISGITLINK(entry.mode)) {
struct commit *commit;
commit = lookup_commit(r, &entry.oid);
if (!commit)
die("Commit %s in submodule path %s%s not found",
oid_to_hex(&entry.oid),
base->buf, entry.path);
/* ... */
if (repo_parse_commit(r, commit))
die("Invalid commit %s in submodule path %s%s",
oid_to_hex(&entry.oid),
base->buf, entry.path);
oidcpy(&oid, get_commit_tree_oid(commit));
}
else
continue;
len = tree_entry_len(&entry);
strbuf_add(base, entry.path, len);
strbuf_addch(base, '/');
retval = read_tree_at(r, lookup_tree(r, &oid),
base, pathspec,
fn, context);
which isn't a no-op since we actually do recurse into the gitlink. I
don't know whether the subsequent call actually succeeds though (e.g.
maybe it always failed and it was just a de facto no-op?), but that's
much harder to prove. Since this function has callers outside of "git
archive", it would be better to be conservative and keep the original
behavior in the S_ISGITLINK(entry.mode) && !pathspec->recurse_submodules
case.
> }
> return 0;
> }
> --
> gitgitgadget
