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pack-objects: create pack.useSparse setting

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The '--sparse' flag in 'git pack-objects' changes the algorithm
used to enumerate objects to one that is faster for individual
users pushing new objects that change only a small cone of the
working directory. The sparse algorithm is not recommended for a
server, which likely sends new objects that appear across the
entire working directory.

Create a 'pack.useSparse' setting that enables this new algorithm.
This allows 'git push' to use this algorithm without passing a
'--sparse' flag all the way through four levels of run_command()
calls.

If the '--no-sparse' flag is set, then this config setting is
overridden.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Derrick Stolee
2019-01-16 10:26:00 -08:00
committed by Junio C Hamano
parent d5d2e93577
commit 3d036eb0d2
3 changed files with 28 additions and 0 deletions
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15
t/t5322-pack-objects-sparse.sh
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@ -118,4 +118,19 @@ test_expect_success 'sparse pack-objects' '
test_cmp expect_sparse_objects.txt sparse_objects.txt
'
test_expect_success 'pack.useSparse enables algorithm' '
git config pack.useSparse true &&
git pack-objects --stdout --revs <packinput.txt >sparse.pack &&
git index-pack -o sparse.idx sparse.pack &&
git show-index <sparse.idx | awk "{print \$2}" >sparse_objects.txt &&
test_cmp expect_sparse_objects.txt sparse_objects.txt
'
test_expect_success 'pack.useSparse overridden' '
git pack-objects --stdout --revs --no-sparse <packinput.txt >sparse.pack &&
git index-pack -o sparse.idx sparse.pack &&
git show-index <sparse.idx | awk "{print \$2}" >sparse_objects.txt &&
test_cmp required_objects.txt sparse_objects.txt
'
test_done