Struct Options 

pub struct Options<'a> {
    pub unit: Option<&'a str>,
    pub stale: bool,
    pub rustc_key: Option<&'a str>,
    pub husks: bool,
    pub older_than: Option<&'a str>,
    pub work_dirs: bool,
    pub work_dir: Option<&'a str>,
    pub work: Option<&'a str>,
    pub crate_name: Option<&'a str>,
    pub tier: Tier,
    pub force: bool,
    pub delete: bool,
}

What the user asked to evict.

Fields

unit: Option<&'a str>

Unit query: dir name, dir hash fragment, or package name.

stale: bool

Every unit on a stale toolchain generation (the bulk selector).

rustc_key: Option<&'a str>

Exact (or prefix) rustc fingerprint identity.

husks: bool

Units whose artifacts are already missing (fingerprint husks).

older_than: Option<&'a str>

Units untouched for longer than this (e.g. 30d).

work_dirs: bool

The per-job working-dir tier: collect work/<job-id>/ views (its own selector; default age 7 days).

work_dir: Option<&'a str>

Remove ONE job dir now (name, work/<id>, or a path under work/): explicit choices bypass the GC age window; a locked dir is refused.

work: Option<&'a str>

Surgical view operation: unlink units from ONE view only (build, a work/<id> job dir, or a path). Never touches the vault.

crate_name: Option<&'a str>

Package selector for --work (dashes and underscores both match).

tier: Tier

Which tier an eviction touches: the store, the views, or both.

force: bool

Also allow evicting current-generation units.

delete: bool

Actually delete (without this it is a dry run).