Mountain/ProcessManagement/NodeResolver/TryFnm.rs
1
2//! fnm shim lookup. `FNM_MULTISHELL_PATH` (active shell) wins; otherwise
3//! probe the per-OS multishell cache directories.
4
5use std::path::PathBuf;
6
7use crate::ProcessManagement::NodeResolver::{NodeExecutableName, NodeSource, ResolvedNode};
8
9pub fn Fn() -> Option<ResolvedNode::Struct> {
10 if let Ok(Multishell) = std::env::var("FNM_MULTISHELL_PATH") {
11 let Candidate = PathBuf::from(Multishell).join("bin").join(NodeExecutableName::Fn());
12
13 if Candidate.exists() {
14 return Some(ResolvedNode::Struct { Path:Candidate, Source:NodeSource::Enum::Fnm });
15 }
16 }
17
18 let Home = std::env::var("HOME").ok()?;
19
20 for Relative in ["/.local/share/fnm/current/bin", "/Library/Caches/fnm_multishells/current/bin"] {
21 let Candidate = PathBuf::from(&Home)
22 .join(Relative.trim_start_matches('/'))
23 .join(NodeExecutableName::Fn());
24
25 if Candidate.exists() {
26 return Some(ResolvedNode::Struct { Path:Candidate, Source:NodeSource::Enum::Fnm });
27 }
28 }
29
30 None
31}