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path-walk: allow consumer to specify object types

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We add the ability to filter the object types in the path-walk API so
the callback function is called fewer times.

This adds the ability to ask for the commits in a list, as well. We
re-use the empty string for this set of objects because these are passed
directly to the callback function instead of being part of the
'path_stack'.

Future changes will add the ability to visit annotated tags.

Signed-off-by: Derrick Stolee <stolee@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Derrick Stolee
2024-12-20 16:21:12 +00:00
committed by Junio C Hamano
parent d190124f27
commit c8dba310d7
5 changed files with 170 additions and 50 deletions
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9
Documentation/technical/api-path-walk.txt
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@ -39,6 +39,15 @@ It is also important that you do not specify the `--objects` flag for the
the objects will be walked in a separate way based on those starting
commits.
`commits`, `blobs`, `trees`::
By default, these members are enabled and signal that the path-walk
API should call the `path_fn` on objects of these types. Specialized
applications could disable some options to make it simpler to walk
the objects or to have fewer calls to `path_fn`.
+
While it is possible to walk only commits in this way, consumers would be
better off using the revision walk API instead.
Examples
--------