minimal grep on stdin

.gitignore

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

Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "tsed"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+clap = { version = "3.0.10", features = ["derive"] }
+regex = "1"

src/main.rs

@@ -0,0 +1,25 @@
+use clap::Parser;
+use regex::Regex;
+use std::io;
+
+#[derive(Parser, Debug)]
+#[clap(author, version, about, long_about = None)]
+struct Cli {
+    /// The pattern to find
+    #[clap()]
+    pattern: String
+}
+
+fn main() {
+    let args = Cli::parse();
+    let stdin = io::stdin();
+
+    let regex = Regex::new(&args.pattern).unwrap();
+    let mut buf = String::new();
+    while stdin.read_line(&mut buf).unwrap() != 0 {
+        if regex.is_match(&buf) {
+            print!("{}", buf);
+        }
+        buf.clear();
+    }
+}