Add source

Cargo.lock

@@ -0,0 +1,162 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
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Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "unambig-path"
+version = "0.1.0"
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+dirs = "3.0"

src/main.rs

@@ -0,0 +1,63 @@
+use std::io::Result;
+
+fn main() -> Result<()> {
+    let mut path = std::env::current_dir()?;
+
+    let mut segments = Vec::new();
+
+    let mut is_home = false;
+    while let Some(parent) = path.parent() {
+        if Some(&path) == dirs::home_dir().as_ref() {
+            segments.push(("~".to_string(), false));
+            is_home = true;
+            break;
+        }
+
+        let dir = path.file_name().unwrap().to_str().expect("Invalid utf-8 in path");
+
+        let mut largest_shared_prefix_len = 0;
+        for other_path in std::fs::read_dir(&parent)?.filter_map(|x| x.ok()).map(|x| x.file_name()) {
+            let other: &str = match other_path.to_str() {
+                Some(x) => x,
+                None => continue,
+            };
+
+            if other == dir { continue; }
+
+            let mut shared_prefix_len = 0;
+
+            for (ch1, ch2) in dir.chars().zip(other.chars()) {
+                if ch1 == ch2 {
+                    shared_prefix_len += 1;
+                } else {
+                    break;
+                }
+            }
+
+            largest_shared_prefix_len = largest_shared_prefix_len.max(shared_prefix_len);
+        }
+
+        if largest_shared_prefix_len >= dir.chars().count() - 2 {
+            segments.push((dir.to_string(), false));
+        } else {
+            let segment = dir.chars().take(largest_shared_prefix_len + 1).collect::<String>();
+            segments.push((segment, true));
+        }
+        path = parent.to_path_buf();
+    }
+
+    let mut res = std::path::PathBuf::new();
+    if !is_home {
+        res.push("/");
+    }
+    for (segment, is_prefix) in segments.into_iter().rev() {
+        if is_prefix {
+            res.push(segment + "…");
+        } else {
+            res.push(segment);
+        }
+    }
+    print!("{}/", res.to_str().unwrap());
+
+    Ok(())
+}