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c29c46fa2e
Older versions of pack-refs did not write peel lines for refs outside of refs/tags. This meant that on reading the pack-refs file, we might set the REF_KNOWS_PEELED flag for such a ref, even though we do not know anything about its peeled value. The previous commit updated the writer to always peel, no matter what the ref is. That means that packed-refs files written by newer versions of git are fine to be read by both old and new versions of git. However, we still have the problem of reading packed-refs files written by older versions of git, or by other implementations which have not yet learned the same trick. The simplest fix would be to always unset the REF_KNOWS_PEELED flag for refs outside of refs/tags that do not have a peel line (if it has a peel line, we know it is valid, but we cannot assume a missing peel line means anything). But that loses an important optimization, as upload-pack should not need to load the object pointed to by refs/heads/foo to determine that it is not a tag. Instead, we add a "fully-peeled" trait to the packed-refs file. If it is set, we know that we can trust a missing peel line to mean that a ref cannot be peeled. Otherwise, we fall back to assuming nothing. [commit message and tests by Jeff King <peff@peff.net>] Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
65 lines
1.7 KiB
Bash
Executable file
65 lines
1.7 KiB
Bash
Executable file
#!/bin/sh
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test_description='tests for the peel_ref optimization of packed-refs'
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. ./test-lib.sh
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test_expect_success 'create annotated tag in refs/tags' '
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test_commit base &&
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git tag -m annotated foo
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'
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test_expect_success 'create annotated tag outside of refs/tags' '
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git update-ref refs/outside/foo refs/tags/foo
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'
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# This matches show-ref's output
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print_ref() {
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echo "$(git rev-parse "$1") $1"
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}
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test_expect_success 'set up expected show-ref output' '
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{
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print_ref "refs/heads/master" &&
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print_ref "refs/outside/foo" &&
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print_ref "refs/outside/foo^{}" &&
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print_ref "refs/tags/base" &&
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print_ref "refs/tags/foo" &&
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print_ref "refs/tags/foo^{}"
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} >expect
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'
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test_expect_success 'refs are peeled outside of refs/tags (loose)' '
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git show-ref -d >actual &&
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test_cmp expect actual
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'
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test_expect_success 'refs are peeled outside of refs/tags (packed)' '
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git pack-refs --all &&
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git show-ref -d >actual &&
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test_cmp expect actual
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'
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test_expect_success 'create old-style pack-refs without fully-peeled' '
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# Git no longer writes without fully-peeled, so we just write our own
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# from scratch; we could also munge the existing file to remove the
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# fully-peeled bits, but that seems even more prone to failure,
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# especially if the format ever changes again. At least this way we
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# know we are emulating exactly what an older git would have written.
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{
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echo "# pack-refs with: peeled " &&
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print_ref "refs/heads/master" &&
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print_ref "refs/outside/foo" &&
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print_ref "refs/tags/base" &&
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print_ref "refs/tags/foo" &&
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echo "^$(git rev-parse "refs/tags/foo^{}")"
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} >tmp &&
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mv tmp .git/packed-refs
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'
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test_expect_success 'refs are peeled outside of refs/tags (old packed)' '
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git show-ref -d >actual &&
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test_cmp expect actual
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'
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test_done
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