starting to write a rubygrep

.gitignore

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Cargo.lock

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Cargo.toml

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+[package]
+name = "rubygrep"
+version = "0.1.0"
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+lib-ruby-parser = "*"
+clap = "*"
+fehler = "*"
+walkdir = "*"
+crossbeam = "*"

src/main.rs

@@ -0,0 +1,47 @@
+use walkdir::WalkDir;
+
+struct Args {
+    targets: Vec<&'static str>,
+}
+
+fn is_ruby_source(path: &std::path::Path) -> bool {
+    if let Some(ext) = path.extension() {
+        return ext == "rb";
+    }
+    false
+}
+
+fn main() {
+    let args = Args {
+        targets: vec!["."],
+    };
+
+    let (work_send, work_recv) = crossbeam::channel::unbounded();
+
+    // produce a thread which populates the channel with work
+    let producer = std::thread::spawn(move || {
+        for target in args.targets {
+            for entry in WalkDir::new(target).into_iter().filter_map(|e| e.ok()) {
+                if is_ruby_source(entry.path()) {
+                    work_send.send(entry).expect("Unable to send work from producer thread");
+                }
+            }
+        }
+    });
+
+    // produce a set of threads which
+    let workers: Vec<std::thread::JoinHandle<()>> = (0..8).map(|id| {
+        let receiver = work_recv.clone();
+        std::thread::spawn(move || {
+            while let Ok(msg) = receiver.recv() {
+                println!("thread {} processing {:?}", id, msg);
+            }
+            println!("thread {} done", id);
+        })
+    }).collect();
+
+    producer.join().unwrap();
+    for w in workers {
+        w.join().unwrap();
+    }
+}

src/pattern.rs

@@ -0,0 +1,12 @@
+#[derive(Eq, PartialEq)]
+enum NodeType {
+    Send,
+    Local,
+    Const,
+    Anything,
+}
+
+#[derive(Eq, PartialEq)]
+struct Pattern {
+    node_type: NodeType,
+}