object-name: diagnose trees in index properly

When running 'git show :<path>' where '<path>' is a directory, then
there is a subtle difference between a full checkout and a sparse
checkout. The error message from diagnose_invalid_index_path() reports
whether the path is on disk or not. The full checkout will have the
directory on disk, but the path will not be in the index. The sparse
checkout could have the directory not exist, specifically when that
directory is outside of the sparse-checkout cone.

In the case of a sparse index, we have yet another state: the path can
be a sparse directory in the index. In this case, the error message from
diagnose_invalid_index_path() would erroneously say "path '<path>' is in
the index, but not at stage 0", which is false.

Add special casing around sparse directory entries so we get to the
correct error message. This requires two checks in order to get parity
with the normal sparse-checkout case.

Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Derrick Stolee
2022-04-26 20:43:19 +00:00
committed by Junio C Hamano
parent 561287d342
commit 4925adb4da
2 changed files with 16 additions and 8 deletions

View File

@ -1832,7 +1832,8 @@ static void diagnose_invalid_index_path(struct repository *r,
pos = -pos - 1;
if (pos < istate->cache_nr) {
ce = istate->cache[pos];
if (ce_namelen(ce) == namelen &&
if (!S_ISSPARSEDIR(ce->ce_mode) &&
ce_namelen(ce) == namelen &&
!memcmp(ce->name, filename, namelen))
die(_("path '%s' is in the index, but not at stage %d\n"
"hint: Did you mean ':%d:%s'?"),
@ -1848,7 +1849,8 @@ static void diagnose_invalid_index_path(struct repository *r,
pos = -pos - 1;
if (pos < istate->cache_nr) {
ce = istate->cache[pos];
if (ce_namelen(ce) == fullname.len &&
if (!S_ISSPARSEDIR(ce->ce_mode) &&
ce_namelen(ce) == fullname.len &&
!memcmp(ce->name, fullname.buf, fullname.len))
die(_("path '%s' is in the index, but not '%s'\n"
"hint: Did you mean ':%d:%s' aka ':%d:./%s'?"),