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attr: be careful about sparse directories 

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Reviewed-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Derrick Stolee 2021-09-08 01:42:31 +00:00 committed by Junio C Hamano
parent 02155c8c00
commit 77efbb366a
1 changed files with 15 additions and 0 deletions
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15
attr.c
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@ -14,6 +14,7 @@
#include "utf8.h"
#include "quote.h"
#include "thread-utils.h"
#include "dir.h"
const char git_attr__true[] = "(builtin)true";
const char git_attr__false[] = "\0(builtin)false";
@ -744,6 +745,20 @@ static struct attr_stack *read_attr_from_index(struct index_state *istate,
if (!istate)
return NULL;
/*
* The .gitattributes file only applies to files within its
* parent directory. In the case of cone-mode sparse-checkout,
* the .gitattributes file is sparse if and only if all paths
* within that directory are also sparse. Thus, don't load the
* .gitattributes file since it will not matter.
*
* In the case of a sparse index, it is critical that we don't go
* looking for a .gitattributes file, as doing so would cause the
* index to expand.
*/
if (!path_in_cone_mode_sparse_checkout(path, istate))
return NULL;
buf = read_blob_data_from_index(istate, path, NULL);
if (!buf)
return NULL;