#!/bin/sh test_description='handling of duplicate objects in incoming packfiles' . ./test-lib.sh . "$TEST_DIRECTORY"/lib-pack.sh # The sha1s we have in our pack. It's important that these have the same # starting byte, so that they end up in the same fanout section of the index. # That lets us make sure we are exercising the binary search with both sets. LO_SHA1=e68fe8129b546b101aee9510c5328e7f21ca1d18 HI_SHA1=e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 # And here's a "missing sha1" which will produce failed lookups. It must also # be in the same fanout section, and should be between the two (so that during # our binary search, we are sure to end up looking at one or the other of the # duplicate runs). MISSING_SHA1='e69d000000000000000000000000000000000000' # git will never intentionally create packfiles with # duplicate objects, so we have to construct them by hand. # # $1 is the name of the packfile to create # # $2 is the number of times to duplicate each object create_pack () { pack_header "$((2 * $2))" >"$1" && for i in $(test_seq 1 "$2"); do pack_obj $LO_SHA1 && pack_obj $HI_SHA1 done >>"$1" && pack_trailer "$1" } # double-check that create_pack actually works test_expect_success 'pack with no duplicates' ' create_pack no-dups.pack 1 && git index-pack --stdin <no-dups.pack ' test_expect_success 'index-pack will allow duplicate objects by default' ' clear_packs && create_pack dups.pack 100 && git index-pack --stdin <dups.pack ' test_expect_success 'create batch-check test vectors' ' cat >input <<-EOF && $LO_SHA1 $HI_SHA1 $MISSING_SHA1 EOF cat >expect <<-EOF $LO_SHA1 blob 2 $HI_SHA1 blob 0 $MISSING_SHA1 missing EOF ' test_expect_success 'lookup in duplicated pack (binary search)' ' git cat-file --batch-check <input >actual && test_cmp expect actual ' test_expect_success 'lookup in duplicated pack (GIT_USE_LOOKUP)' ' ( GIT_USE_LOOKUP=1 && export GIT_USE_LOOKUP && git cat-file --batch-check <input >actual ) && test_cmp expect actual ' test_expect_success 'index-pack can reject packs with duplicates' ' clear_packs && create_pack dups.pack 2 && test_must_fail git index-pack --strict --stdin <dups.pack && test_expect_code 1 git cat-file -e $LO_SHA1 ' test_done