Initial commit

Author: hmarr

.gitignore

@@ -0,0 +1 @@
+/target

Cargo.lock

@@ -0,0 +1,14 @@
+[package]
+name = "codeowners-rs"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+walkdir = "2.0"
+anyhow = "1.0.66"
+regex = "1.6.0"
+
+[profile.release]
+debug = true

Cargo.toml

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+use std::{collections::HashMap, fs::File};
+
+use anyhow::Result;
+use nfa::PatternNFA;
+
+mod nfa;
+mod parser;
+
+fn main() -> Result<()> {
+    let rules = parser::parse_rules(File::open("./CODEOWNERS")?);
+
+    let mut nfa = PatternNFA::new();
+    let rule_ids = rules
+        .iter()
+        .enumerate()
+        .map(|(i, rule)| (nfa.add_pattern(&rule.pattern), i))
+        .collect::<HashMap<_, _>>();
+
+    let root = ".";
+    for entry in walk_files(root) {
+        let path = entry
+            .path()
+            .strip_prefix(".") // TODO strip root?
+            .unwrap_or_else(|_| entry.path());
+
+        match nfa.matching_patterns(path.to_str().unwrap()).iter().max() {
+            Some(id) => {
+                let rule = &rules[*rule_ids.get(id).unwrap()];
+                println!("{:<70}  {}", path.display(), rule.owners.join(" ")) // TODO join alloc?
+            }
+            None => println!("{:<70}  (unowned)", path.display()),
+        }
+    }
+
+    Ok(())
+}
+
+fn walk_files(root: &str) -> impl Iterator<Item = walkdir::DirEntry> {
+    walkdir::WalkDir::new(root)
+        .min_depth(1)
+        .into_iter()
+        .filter_map(|e| e.ok())
+        .filter(|entry| entry.file_type().is_file())
+        .filter(|entry| !entry.path().starts_with("./.git"))
+}