syntax_data: {"ast_node_type":"other","tokens":[{"end":46,"kind":"keyword","start":0,"text":"dir.parent()"}]}
source_snippet:             dir.parent() // chop off `$target`
context_before:         let mut sysroot_dir = if dir.ends_with(crate::config::host_tuple()) {
context_after:                 .and_then(|p| p.parent()) // chop off `rustlib`