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fix: symlinks

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This commit is contained in:
LynithDev 2026-09-13 01:59:25 +02:00
parent 54980fa73a
commit 5d8db4abf7
1 changed files with 47 additions and 2 deletions
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49
packages/polyio/src/file.rs
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@ -620,6 +620,10 @@ pub async fn symlink_metadata(path: impl AsRef<std::path::Path>) -> PolyIOResult
})
}
fn resolved_target(original: &std::path::Path) -> PathBuf {
crate::canonicalize(original).unwrap_or_else(|_| original.to_path_buf())
}
/// Symlink on Unix hard link on Windows so both paths must be on one volume
#[tracing::instrument(
level = "debug",
@ -633,7 +637,8 @@ pub async fn symlink_file(
original: impl AsRef<std::path::Path>,
link: impl AsRef<std::path::Path>,
) -> PolyIOResult<()> {
let original = original.as_ref();
let original = resolved_target(original.as_ref());
let original = original.as_path();
let link = link.as_ref();
#[cfg(windows)]
@ -723,7 +728,8 @@ pub async fn symlink_dir(
original: impl AsRef<std::path::Path>,
link: impl AsRef<std::path::Path>,
) -> PolyIOResult<()> {
let original = original.as_ref();
let original = resolved_target(original.as_ref());
let original = original.as_path();
let link = link.as_ref();
#[cfg(windows)]
@ -846,6 +852,45 @@ mod tests {
assert_eq!(write_buffer_size(Some(0)), DEFAULT_WRITE_BUFFER);
}
#[cfg(unix)]
#[tokio::test]
async fn a_link_target_is_stored_resolved() {
let root = scratch("resolved-target");
let real = root.join("var").join("home");
std::fs::create_dir_all(&real).unwrap();
std::os::unix::fs::symlink(&real, root.join("home")).unwrap();
let pack = real.join("pack.zip");
std::fs::write(&pack, b"pack").unwrap();
let through_link = root.join("home").join("pack.zip");
let link = root.join("resourcepacks.zip");
symlink_file(&through_link, &link).await.unwrap();
assert_eq!(
read_link(&link).await.unwrap(),
crate::canonicalize(&pack).unwrap(),
"the stored target must be the resolved path, not the spelling we were given"
);
std::fs::remove_dir_all(&root).ok();
}
#[cfg(unix)]
#[tokio::test]
async fn a_missing_target_is_stored_as_given() {
let root = scratch("unresolved-target");
let missing = root.join("not-here.zip");
let link = root.join("link.zip");
symlink_file(&missing, &link).await.unwrap();
assert_eq!(read_link(&link).await.unwrap(), missing);
std::fs::remove_dir_all(&root).ok();
}
fn scratch(tag: &str) -> PathBuf {
static N: AtomicU64 = AtomicU64::new(0);
let dir = std::env::temp_dir().join(format!(