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authorLibravatar Jonathan Nieder <jrnieder@gmail.com>2020-01-03 16:13:31 -0800
committerLibravatar Junio C Hamano <gitster@pobox.com>2020-01-06 08:44:24 -0800
commit60440d72db4c9f2fc05b841813e72159c4f08928 (patch)
tree2bc28ab59a2138996ad102578c7e4947aa222a66 /t/t4051
parentGit 2.24.1 (diff)
downloadtgif-60440d72db4c9f2fc05b841813e72159c4f08928.tar.xz
sha1-file: document how to use pretend_object_file
Like in-memory alternates, pretend_object_file contains a trap for the unwary: careless callers can use it to create references to an object that does not exist in the on-disk object store. Add a comment documenting how to use the function without risking such problems. The only current caller is blame, which uses pretend_object_file to create an in-memory commit representing the working tree state. Noticed during a discussion of how to safely use this function in operations like "git merge" which, unlike blame, are not read-only. Inspired-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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