refactor: remove pattern from matches as it's not needed on each

instance

src/main.rs

@@ -27,6 +27,9 @@ fn run() -> anyhow::Result<Matches> {
     // println!("{:?} {}", cli.file_paths, cli.pattern);
 
     let matches = process_files(&cli.file_paths, &cli.pattern, &cli.get_options())?;
+    if !matches.is_empty() {
+        println!("Matches for pattern {}:", cli.pattern);
+    }
 
     Ok(matches)
 }

src/matches.rs

@@ -8,7 +8,6 @@ pub struct Match {
 
 pub struct Matches {
     pub items: Vec<Match>,
-    pub pattern: String,
 }
 
 impl Matches {
@@ -29,8 +28,6 @@ impl Display for Match {
 
 impl Display for Matches {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        writeln!(f, "Matches for pattern {}:", self.pattern)?;
-
         for (idx, item) in self.items.iter().enumerate() {
             if idx > 0 {
                 writeln!(f)?;

src/parser.rs

@@ -22,8 +22,9 @@ pub fn process_files(
         .build()
         .with_context(|| format!("invalid regex: {:?}", pattern))?;
 
-    let mut matches = Matches { items: vec![], pattern: String::from(pattern) };
+    let mut matches = Matches { items: vec![] };
 
+    // fails and stops everything when one file fails
     for file_path in file_paths {
         let lines_iter = read_lines(file_path)?;
         let mut _matches = match_pattern(lines_iter, pattern, file_path, &reg)?;
@@ -71,7 +72,7 @@ pub fn match_pattern(
         }
     }
 
-    Ok(Matches { items: matches, pattern: String::from(pattern) })
+    Ok(Matches { items: matches })
 }
 
 #[cfg(test)]