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Support empty Git repositories / workdirs

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Fixes #10039.
This commit is contained in:
Eelco Dolstra 2024-02-20 11:40:02 +01:00
parent d52d91fe7a
commit 9e762454cf
5 changed files with 52 additions and 10 deletions
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25
tests/functional/fetchGit.sh
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@ -268,3 +268,28 @@ git -C "$repo" add hello .gitignore
git -C "$repo" commit -m 'Bla1'
cd "$repo"
path11=$(nix eval --impure --raw --expr "(builtins.fetchGit ./.).outPath")
# Test a workdir with no commits.
empty="$TEST_ROOT/empty"
git init "$empty"
emptyAttrs='{ lastModified = 0; lastModifiedDate = "19700101000000"; narHash = "sha256-pQpattmS9VmO3ZIQUFn66az8GSmB4IvYhTTCFn6SUmo="; rev = "0000000000000000000000000000000000000000"; revCount = 0; shortRev = "0000000"; submodules = false; }'
[[ $(nix eval --impure --expr "builtins.removeAttrs (builtins.fetchGit $empty) [\"outPath\"]") = $emptyAttrs ]]
echo foo > "$empty/x"
[[ $(nix eval --impure --expr "builtins.removeAttrs (builtins.fetchGit $empty) [\"outPath\"]") = $emptyAttrs ]]
git -C "$empty" add x
[[ $(nix eval --impure --expr "builtins.removeAttrs (builtins.fetchGit $empty) [\"outPath\"]") = '{ lastModified = 0; lastModifiedDate = "19700101000000"; narHash = "sha256-wzlAGjxKxpaWdqVhlq55q5Gxo4Bf860+kLeEa/v02As="; rev = "0000000000000000000000000000000000000000"; revCount = 0; shortRev = "0000000"; submodules = false; }' ]]
# Test a repo with an empty commit.
git -C "$empty" rm -f x
git -C "$empty" config user.email "foobar@example.com"
git -C "$empty" config user.name "Foobar"
git -C "$empty" commit --allow-empty --allow-empty-message --message ""
nix eval --impure --expr "let attrs = builtins.fetchGit $empty; in assert attrs.lastModified != 0; assert attrs.rev != \"0000000000000000000000000000000000000000\"; assert attrs.revCount == 1; true"