On Sun, Jun 10, 2018 at 02:32:57PM +0000, Kirill Smelkov wrote:
> Added test shows remote with two tag objects pointing to a blob and a
> tree. The tag objects themselves are referenced from under regular
> refs/tags/* namespace. If test_expect_failure is changed to
> test_expect_success the test fails:
Interesting case. The problem is actually that upload-pack complains:
> fatal: git upload-pack: not our ref
> 038f48ad0beaffbea71d186a05084b79e3870cbf
And that sha1 is the tagged blob:
> bc4e9e1fa80662b449805b1ac29fc9b1e4c49187 refs/tags/tag-to-blob
> # <-- NOTE
> 038f48ad0beaffbea71d186a05084b79e3870cbf refs/tags/tag-to-blob^{}
> 520db1f5e1afeaa12b1a8d73ce82db72ca036ee1 refs/tags/tag-to-tree
> # <-- NOTE
> 7395c100223b7cd760f58ccfa0d3f3d2dd539bb6 refs/tags/tag-to-tree^{}
So it seems like upload-pack is at fault for not marking the object as a
tip when it peels the tag.
> For the reference, porcelain fetch 'refs/*:refs/origin/*' works:
That's because it doesn't actually issue a "want" for the peeled blob
(it doesn't need to, because it's fetching the tag itself). So it
happens to work, but I still think upload-pack is at fault for not
accepting the "want" on the blob it advertised.
Doubly interesting, it looks like this case _used_ to work, but was
broken by 5f0fc64513 (fetch-pack: eliminate spurious error messages,
2012-09-09). Which only changed the fetch-pack side. It moved the
handling of --all so that it was no longer in the "else" for
check_refname_format(). I guess the original code was rejecting those
peeled bits as "not a ref" (which makes sense).
So that seems like a bug in fetch-pack. But I'm still not convinced that
upload-pack doesn't also have a bug.
> +test_expect_failure 'test --all wrt tag to non-commits' '
> + blob_sha1=$(echo "hello blob" | git hash-object -t blob -w --stdin) &&
> + git tag -a -m "tag -> blob" tag-to-blob $blob_sha1 &&
> + tree_sha1=$(echo -e "100644 blob $blob_sha1\tfile" | git mktree) &&
I had to switch this "echo -e" to:
printf "100644 blob $blob_sha1\tfile\n"
since "-e" is a bash-ism (and my /bin/sh is dash).
-Peff
