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Don't dereference top-level regular files

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Since this yielded an empty directory as far back as Nix 2.3, we don't
really need special handling for executables vs non-executables.
This commit is contained in:
Eelco Dolstra 2024-07-29 14:34:02 +02:00
parent e0012b97ab
commit 7c18b4d060
3 changed files with 3 additions and 17 deletions
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3
src/libfetchers/git-utils.cc
View file

@ -491,14 +491,13 @@ struct GitRepoImpl : GitRepo, std::enable_shared_from_this<GitRepoImpl>
{
auto oid = hashToOID(oid_);
/* If the root directory contains */
auto _tree = lookupObject(*this, oid, GIT_OBJECT_TREE);
auto tree = (const git_tree *) &*_tree;
if (git_tree_entrycount(tree) == 1) {
auto entry = git_tree_entry_byindex(tree, 0);
auto mode = git_tree_entry_filemode(entry);
if (mode == GIT_FILEMODE_BLOB || mode == GIT_FILEMODE_TREE)
if (mode == GIT_FILEMODE_TREE)
oid = *git_tree_entry_id(entry);
}

7
src/libfetchers/git-utils.hh
View file

@ -101,12 +101,7 @@ struct GitRepo
/**
* If the specified Git object is a directory with a single entry
* that is a directory or a non-executable regular file, return
* the ID of that object.
*
* Note: We don't do this for executable files because they don't
* have a tree hash in the Git object model that distinguishes
* them from non-executable files.
* that is a directory, return the ID of that object.
*/
virtual Hash dereferenceSingletonDirectory(const Hash & oid) = 0;
};

10
tests/functional/tarball.sh
View file

@ -92,15 +92,7 @@ path="$(nix flake prefetch --json "tarball+file://$TEST_ROOT/tar.tar" | jq -r .s
[[ -d "$path/foo" ]]
[[ -d "$path/bar" ]]
# Test a tarball that has a single non-executable regular file.
rm -rf "$TEST_ROOT/tar_root"
mkdir -p "$TEST_ROOT/tar_root"
echo bar > "$TEST_ROOT/tar_root/foo"
tar cvf "$TEST_ROOT/tar.tar" -C "$TEST_ROOT/tar_root" .
path="$(nix flake prefetch --refresh --json "tarball+file://$TEST_ROOT/tar.tar" | jq -r .storePath)"
[[ $(cat "$path") = bar ]]
# Test a tarball that has a single executable regular file.
# Test a tarball that has a single regular file.
rm -rf "$TEST_ROOT/tar_root"
mkdir -p "$TEST_ROOT/tar_root"
echo bar > "$TEST_ROOT/tar_root/foo"