Cache hit still triggers “No such file or directory” on dep-info writes

[knylbyte]

My Docker-based CI (cargo chef + sccache 0.11.0) still fails on cache hits with

error writing dependencies to `/src/target/<rust-target>/release/deps/<crate>.d`: No such file or directory (os error 2)

or

error writing dependencies to `/src/target/release/deps/<crate>.d`: No such file or directory (os error 2)

even though #2076 is closed. The published crate from crates.io still lacks a parent-directory guard before writing the dep-info file.

Environment:

• sccache 0.11.0 (cargo install --locked sccache --version 0.11.0)
• cargo-chef 0.1.73
• rustc 1.90.0 (from rust:1.90.0-trixie docker image)
• BuildKit (Docker) on ubuntu-24.04 runner
• sccache cache mounts provided via buildkit-cache-dance (binds /usr/local/cargo/registry, /usr/local/cargo/git, /var/cache/sccache)

Failing step:
cargo chef cook --release --locked --target x86_64-unknown-linux-musl --recipe-path backend-recipe.json

Expected:
Cache hits should succeed without manual directory preparation.

Suggested fix (from: codex-5-high:
Add a directory guard in rewrite() before recreating the dep-info file (src/compiler/rust.rs#L2285-L2289):

if let Some(parent) = dep_info.parent() {
    fs::create_dir_all(parent).with_context(|| {
        format!("Failed to create dep-info directory {}", parent.display())
    })?;
}
let mut file = fs::File::create(&dep_info)
    .context("Failed to recreate dep info file")?;
file.write_all(deps.as_bytes())?;