2 files changed, 28 insertions, 8 deletions

diff --git a/rust-cli/grrs/src/lib.rs b/rust-cli/grrs/src/lib.rs
new file mode 100644
index 0000000..f91064f
--- /dev/null
+++ b/rust-cli/grrs/src/lib.rs
@@ -0,0 +1,13 @@
+use std::{io::{BufReader, BufRead, Error}, fs::File};
+
+pub fn find_matches(file: &File, pattern: &str) -> Result<Vec<String>, Error> {
+    let reader = BufReader::new(file);
+    let mut result = Vec::<String>::new();
+    for line in reader.lines() {
+        let line_val = line.unwrap();
+        if line_val.contains(&pattern) {
+            result.push(line_val);
+        }
+    }
+    return Ok(result);
+}
\ No newline at end of file
diff --git a/rust-cli/grrs/src/main.rs b/rust-cli/grrs/src/main.rs
index 09e2d3a..e5ed13b 100644
--- a/rust-cli/grrs/src/main.rs
+++ b/rust-cli/grrs/src/main.rs
@@ -1,5 +1,4 @@
-use std::io::{BufReader, BufRead};
-use std::fs::File;
+use std::fs::{File};
 use::clap::Parser;
 
 #[derive(Parser)]
@@ -8,14 +7,22 @@ struct Cli {
     path: std::path::PathBuf,
 }
 
-
 fn main() {
     let args = Cli::parse();
-    //println!("pattern: {}, path: {}",args.pattern, args.path.display());
+    if !args.path.exists() {
+        eprintln!("The file at '{}' does not exist", &args.path.display());
+        return;
+    }
+    if args.pattern.is_empty() {
+        eprintln!("No pattern was supplied, see --help");
+        return;
+    }
     let file = File::open(args.path).expect("could not read file");
-    let mut reader = BufReader::new(file);
-    for line in reader.lines() {
-        if line.unwrap_or_default().contains(&args.pattern) {
-        }
+    let matches = grrs::find_matches(&file, &args.pattern).unwrap();
+    if matches.len() < 1 {
+        return;
+    }
+    for line in matches {
+        println!("{}", line);
     }
 }