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git-lfs/t/t-alternates.sh

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fs: support multiple object alternates Like in upstream Git, Git LFS supports "object database alternates" (described in [1]) to link several object databases together. We have supported this feature since [2] but read the entire .git/objects/info/alternates in one single buffer via ioutil.ReadFile and checked if a directory existed at that location. If a user specified multiple alternates, then this will fail. Git LFS will look for a directory that has newlines in it, when what it should be doing is splitting that list by the '\n' character and checking each directory if it exists. Let's do that, and also return a []string, instead of a single string, to indicate that there might be multiple alternates in a repository. [1]: https://git-scm.com/docs/gitrepository-layout#gitrepository-layout-objectsinfoalternates [2]: https://github.com/git-lfs/git-lfs/pull/1007/files
2018-07-09 15:28:23 +00:00
#!/usr/bin/env bash
t: ensure alternates test runs automatically The test for alternates was named test-alternates.sh, but only tests matching "t-*.sh" are run automatically. Since we want to make sure that alternates continue to work, rename this file. Update the source command to use the correct directory as well.
2019-08-08 14:50:39 +00:00
. "$(dirname "$0")/testlib.sh"
fs: support multiple object alternates Like in upstream Git, Git LFS supports "object database alternates" (described in [1]) to link several object databases together. We have supported this feature since [2] but read the entire .git/objects/info/alternates in one single buffer via ioutil.ReadFile and checked if a directory existed at that location. If a user specified multiple alternates, then this will fail. Git LFS will look for a directory that has newlines in it, when what it should be doing is splitting that list by the '\n' character and checking each directory if it exists. Let's do that, and also return a []string, instead of a single string, to indicate that there might be multiple alternates in a repository. [1]: https://git-scm.com/docs/gitrepository-layout#gitrepository-layout-objectsinfoalternates [2]: https://github.com/git-lfs/git-lfs/pull/1007/files
2018-07-09 15:28:23 +00:00
begin_test "alternates (single)"
(
set -e
reponame="alternates-single-alternate"
setup_remote_repo_with_file "$reponame" "a.txt"
pushd "$TRASHDIR" > /dev/null
clone_repo "$reponame" "${reponame}_alternate"
popd > /dev/null
rm -rf .git/lfs/objects
alternate="$TRASHDIR/${reponame}_alternate/.git/objects"
echo "$alternate" > .git/objects/info/alternates
GIT_TRACE=1 git lfs fetch origin master 2>&1 | tee fetch.log
[ "0" -eq "$(grep -c "sending batch of size 1" fetch.log)" ]
)
end_test
begin_test "alternates (multiple)"
(
set -e
reponame="alternates-multiple-alternates"
setup_remote_repo_with_file "$reponame" "a.txt"
pushd "$TRASHDIR" > /dev/null
clone_repo "$reponame" "${reponame}_alternate_stale"
rm -rf .git/lfs/objects
popd > /dev/null
pushd "$TRASHDIR" > /dev/null
clone_repo "$reponame" "${reponame}_alternate"
popd > /dev/null
rm -rf .git/lfs/objects
alternate_stale="$TRASHDIR/${reponame}_alternate_stale/.git/objects"
alternate="$TRASHDIR/${reponame}_alternate/.git/objects"
echo "$alternate" > .git/objects/info/alternates
echo "$alternate_stale" >> .git/objects/info/alternates
GIT_TRACE=1 git lfs fetch origin master 2>&1 | tee fetch.log
[ "0" -eq "$(grep -c "sending batch of size 1" fetch.log)" ]
)
end_test
begin_test "alternates (commented)"
(
set -e
reponame="alternates-commented-alternate"
setup_remote_repo_with_file "$reponame" "a.txt"
pushd "$TRASHDIR" > /dev/null
clone_repo "$reponame" "${reponame}_alternate"
popd > /dev/null
rm -rf .git/lfs/objects
alternate="$TRASHDIR/${reponame}_alternate/.git/objects"
echo "# $alternate" > .git/objects/info/alternates
GIT_TRACE=1 git lfs fetch origin master 2>&1 | tee fetch.log
[ "1" -eq "$(grep -c "sending batch of size 1" fetch.log)" ]
)
end_test
begin_test "alternates (quoted)"
(
set -e
reponame="alternates-quoted-alternate"
setup_remote_repo_with_file "$reponame" "a.txt"
pushd "$TRASHDIR" > /dev/null
clone_repo "$reponame" "${reponame}_alternate"
popd > /dev/null
rm -rf .git/lfs/objects
alternate="$TRASHDIR/${reponame}_alternate/.git/objects"
echo "\"$alternate\"" > .git/objects/info/alternates
GIT_TRACE=1 git lfs fetch origin master 2>&1 | tee fetch.log
[ "0" -eq "$(grep -c "sending batch of size 1" fetch.log)" ]
)
end_test
fs/fs.go: support alternates from environment variable The Git documentation also mentions that the "$GIT_ALTERNATE_OBJECT_DIRECTORIES" environment variable is a valid way to configure object database remotes [1]: 2. You could be using the `objects/info/alternates` or `$GIT_ALTERNATE_OBJECT_DIRECTORIES` mechanisms to borrow objects from other object stores. Let's support the same by using the last commit, taking in a handle on the operating-system configuration and using that in addition to the list found in .git/objects/info/alternates. [1]: https://git-scm.com/docs/gitrepository-layout#gitrepository-layout-objectsinfoalternates
2018-07-09 16:23:27 +00:00
begin_test "alternates (OS environment, single)"
(
set -e
reponame="alternates-environment-single-alternate"
setup_remote_repo_with_file "$reponame" "a.txt"
pushd "$TRASHDIR" > /dev/null
clone_repo "$reponame" "${reponame}_alternate"
popd > /dev/null
rm -rf .git/lfs/objects
alternate="$TRASHDIR/${reponame}_alternate/.git/objects"
GIT_ALTERNATE_OBJECT_DIRECTORIES="$alternate" \
GIT_TRACE=1 \
git lfs fetch origin master 2>&1 | tee fetch.log
[ "0" -eq "$(grep -c "sending batch of size 1" fetch.log)" ]
)
end_test
begin_test "alternates (OS environment, multiple)"
(
set -e
reponame="alternates-environment-multiple-alternates"
setup_remote_repo_with_file "$reponame" "a.txt"
pushd "$TRASHDIR" > /dev/null
clone_repo "$reponame" "${reponame}_alternate_stale"
rm -rf .git/lfs/objects
popd > /dev/null
pushd "$TRASHDIR" > /dev/null
clone_repo "$reponame" "${reponame}_alternate"
popd > /dev/null
rm -rf .git/lfs/objects
alternate_stale="$TRASHDIR/${reponame}_alternate_stale/.git/objects"
alternate="$TRASHDIR/${reponame}_alternate/.git/objects"
sep="$(native_path_list_separator)"
GIT_ALTERNATE_OBJECT_DIRECTORIES="$alternate_stale$sep$alternate" \
GIT_TRACE=1 \
git lfs fetch origin master 2>&1 | tee fetch.log
[ "0" -eq "$(grep -c "sending batch of size 1" fetch.log)" ]
)
end_test
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