drop symlinks that point to other directories in $PATH

Signed-off-by: Lars Wirzenius <liw@liw.fi>
Sponsored-by: author

1 files changed, 10 insertions, 1 deletions

diff --git a/src/main.rs b/src/main.rs
index 5c179e7..dc2c068 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,5 @@
+use std::{collections::HashSet, fs::metadata, os::unix::fs::MetadataExt};
+
 fn main() -> anyhow::Result<()> {
     println!("{}", pathdedup(&std::env::var("PATH")?));
     Ok(())
@@ -5,10 +7,17 @@ fn main() -> anyhow::Result<()> {
 
 fn pathdedup(path: &str) -> String {
     let mut elements: Vec<&str> = vec![];
+    let mut seen: HashSet<(u64, u64)> = HashSet::new();
 
     for e in path.split(':') {
         if !elements.contains(&e) {
-            elements.push(e);
+            if let Ok(meta) = metadata(e) {
+                let key = (meta.dev(), meta.ino());
+                if !seen.contains(&key) {
+                    seen.insert(key);
+                    elements.push(e);
+                }
+            }
         }
     }