diff --git a/src/cli.rs b/src/cli.rs
new file mode 100644
index 0000000..e3387b1
--- /dev/null
+++ b/src/cli.rs
@@ -0,0 +1,23 @@
+use clap::Parser;
+use std::path::PathBuf;
+
+#[derive(Parser)]
+pub struct Cli {
+    pub(crate) pattern: String,
+
+    #[arg(value_name = "FILES", num_args = 1..)]
+    pub(crate) file_paths: Vec<PathBuf>,
+
+    #[arg(short, long)]
+    pub(crate) ignore_case: bool,
+}
+
+pub struct CliOptions {
+    pub ignore_case: bool,
+}
+
+impl Cli {
+    pub fn get_options(&self) -> CliOptions {
+        CliOptions { ignore_case: self.ignore_case }
+    }
+}
diff --git a/src/main.rs b/src/main.rs
index 2efcb61..0983088 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,21 +1,11 @@
-use std::{path::PathBuf, process::ExitCode};
+use std::process::ExitCode;
 
-use clap::Parser;
-
-use crate::{matches::Matches, parser::process_files};
+use crate::{cli::Cli, matches::Matches, parser::process_files};
+mod cli;
 mod matches;
 mod parser;
 
-#[derive(Parser)]
-struct Cli {
-    pattern: String,
-
-    #[arg(value_name = "FILES", num_args = 1..)]
-    file_paths: Vec<PathBuf>,
-
-    #[arg(short, long)]
-    ignore_case: bool,
-}
+use clap::Parser;
 
 fn main() -> ExitCode {
     match run() {
@@ -36,7 +26,7 @@ fn run() -> anyhow::Result<Matches> {
 
     // println!("{:?} {}", cli.file_paths, cli.pattern);
 
-    let matches = process_files(&cli.file_paths, &cli.pattern, &cli)?;
+    let matches = process_files(&cli.file_paths, &cli.pattern, &cli.get_options())?;
 
     Ok(matches)
 }
diff --git a/src/matches.rs b/src/matches.rs
index f161e89..9d6093c 100644
--- a/src/matches.rs
+++ b/src/matches.rs
@@ -16,7 +16,7 @@ impl Matches {
         self.items.is_empty()
     }
 
-    pub fn append(&mut self, matches: &mut Self) -> () {
+    pub fn append(&mut self, matches: &mut Self) {
         self.items.append(&mut matches.items);
     }
 }
diff --git a/src/parser.rs b/src/parser.rs
index 83cd964..38ae372 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -8,17 +8,17 @@ use anyhow::Context;
 use regex::{Regex, RegexBuilder};
 
 use crate::{
+    cli::CliOptions,
     matches::{Match, Matches},
-    Cli,
 };
 
 pub fn process_files(
     file_paths: &Vec<PathBuf>,
     pattern: &str,
-    cli: &Cli,
+    cli_options: &CliOptions,
 ) -> anyhow::Result<Matches, anyhow::Error> {
     let reg = RegexBuilder::new(pattern)
-        .case_insensitive(cli.ignore_case)
+        .case_insensitive(cli_options.ignore_case)
         .build()
         .with_context(|| format!("invalid regex: {:?}", pattern))?;
 
@@ -26,7 +26,7 @@ pub fn process_files(
 
     for file_path in file_paths {
         let lines_iter = read_lines(file_path)?;
-        let mut _matches = match_pattern(lines_iter, pattern, file_path, &reg, cli)?;
+        let mut _matches = match_pattern(lines_iter, pattern, file_path, &reg)?;
         matches.append(&mut _matches);
     }
 
@@ -66,7 +66,6 @@ pub fn match_pattern(
     pattern: &str,
     file_path: &Path,
     regex: &Regex,
-    cli: &Cli,
 ) -> anyhow::Result<Matches, anyhow::Error> {
     let mut matches = Vec::new();
 
@@ -107,8 +106,10 @@ mod tests {
         let input: Vec<std::io::Result<String>> =
             vec![Ok("hola".into()), Ok("no".into()), Ok("hola again".into())];
 
+        let reg = Regex::new("hola").unwrap();
+
         let result =
-            match_pattern(input.into_iter(), r"^hola", Path::new("/tmp/test.txt")).unwrap();
+            match_pattern(input.into_iter(), r"^hola", Path::new("/tmp/test.txt"), &reg).unwrap();
 
         assert_eq!(result.items.len(), 2);