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csum-file: refactor finalize_hashfile() method

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If we want to use a hashfile on the temporary file for a lockfile, then
we need finalize_hashfile() to fully write the trailing hash but also keep
the file descriptor open.

Do this by adding a new CSUM_HASH_IN_STREAM flag along with a functional
change that checks this flag before writing the checksum to the stream.
This differs from previous behavior since it would be written if either
CSUM_CLOSE or CSUM_FSYNC is provided.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Derrick Stolee
2018-04-02 16:34:15 -04:00
committed by Junio C Hamano
parent f2af9f5e02
commit cfe83216e4
6 changed files with 14 additions and 12 deletions
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4
builtin/pack-objects.c
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@ -837,9 +837,9 @@ static void write_pack_file(void)
* If so, rewrite it like in fast-import
*/
if (pack_to_stdout) {
finalize_hashfile(f, oid.hash, CSUM_CLOSE);
finalize_hashfile(f, oid.hash, CSUM_HASH_IN_STREAM | CSUM_CLOSE);
} else if (nr_written == nr_remaining) {
finalize_hashfile(f, oid.hash, CSUM_FSYNC);
finalize_hashfile(f, oid.hash, CSUM_HASH_IN_STREAM | CSUM_FSYNC | CSUM_CLOSE);
} else {
int fd = finalize_hashfile(f, oid.hash, 0);
fixup_pack_header_footer(fd, oid.hash, pack_tmp_name,