Ignore case and allowing the user to specify a path

Also ran rustfmt over the code.

src/main.rs

@@ -1,5 +1,6 @@
+use std::fs::{self, File};
 use std::io;
-use std::fs::{self};
+use std::io::prelude::*;
 use std::path::Path;
 
 extern crate term;
@@ -9,13 +10,20 @@ mod config;
 fn main() {
     let config = config::Config::from_args();
 
-    let path = Path::new(".");
+    let search_path = &config.path;
+    let path = match search_path.starts_with('/') {
+        true => Path::new(search_path),
+        false => {
+            let p: &'static str = Box::leak(Box::new(String::from("./") + search_path));
+            Path::new(p)
+        }
+    };
 
     let results = traverse_dir(&config, path, |config, path| check_file(config, path));
     match results {
         Result::Ok(matches) if matches.len() == 0 => println!("No matches :("),
         Result::Ok(matches) => print_report(&matches),
-        Result::Err(msg) => println!("Error while parsing: {}", msg)
+        Result::Err(msg) => println!("Error while parsing: {}", msg),
     }
 }
 
@@ -55,7 +63,7 @@ fn traverse_dir(
 #[derive(Debug)]
 struct FileMatch {
     file_name: String,
-    matches: Vec<Match>
+    matches: Vec<Match>,
 }
 
 impl FileMatch {
@@ -73,12 +81,18 @@ impl FileMatch {
 
             let mut last_position = 0;
             for (idx, match_index) in mat.match_indexes.iter().enumerate() {
-                print!("{}", mat.text.get(last_position..match_index.start).unwrap());
+                print!(
+                    "{}",
+                    mat.text.get(last_position..match_index.start).unwrap()
+                );
                 term.fg(term::color::BRIGHT_RED).unwrap();
-                print!("{}", mat.text.get(match_index.start..match_index.end).unwrap());
+                print!(
+                    "{}",
+                    mat.text.get(match_index.start..match_index.end).unwrap()
+                );
                 term.reset().unwrap();
 
-                if idx == mat.match_indexes.len() -1 {
+                if idx == mat.match_indexes.len() - 1 {
                     println!("{}", mat.text.get(match_index.end..mat.text.len()).unwrap());
                     last_position = 0;
                 } else {
@@ -94,43 +108,55 @@ impl FileMatch {
 struct Match {
     line_number: usize,
     match_indexes: Vec<MatchIndex>,
-    text: String
+    text: String,
 }
 
 #[derive(Debug, Clone)]
 struct MatchIndex {
     start: usize,
-    end: usize
+    end: usize,
 }
 
 fn check_file(config: &config::Config, path: &Path) -> io::Result<FileMatch> {
-    let pattern = &config.pattern;
+    let mut pattern = config.pattern.clone();
 
-    // TODO: Use BufRead and read_line instead of reading the entire file into memory.
-    let content = fs::read_to_string(&path)?;
+    let file = File::open(&path)?;
+    let file = io::BufReader::new(file);
     let mut matches = Vec::new();
-    for (number, line) in content.lines().enumerate() {
-        if line.contains(pattern) {
+
+    for (number, line) in file.lines().enumerate() {
+        let mut line = line?;
+        let orig_line = line.clone();
+        if config.ignore_case {
+            line = line.to_lowercase();
+            pattern = pattern.to_lowercase();
+        }
+
+        if line.contains(&pattern) {
             let mut indexes = Vec::<MatchIndex>::new();
-            for m in line.trim().match_indices(pattern) {
-                indexes.push(MatchIndex { start: m.0, end: m.0 + pattern.len() });
+            for m in line.trim().match_indices(&pattern) {
+                indexes.push(MatchIndex {
+                    start: m.0,
+                    end: m.0 + pattern.len(),
+                });
             }
 
-            matches.push(Match { line_number: number + 1, text: line.trim().to_string(), match_indexes: indexes });
+            matches.push(Match {
+                line_number: number + 1,
+                text: orig_line.trim().to_string(),
+                match_indexes: indexes,
+            });
         }
     }
 
-    Ok(FileMatch { file_name: path.to_str().unwrap().to_string(), matches: matches })
+    Ok(FileMatch {
+        file_name: path.to_str().unwrap().trim_start_matches("./").to_string(),
+        matches: matches,
+    })
 }
 
 fn print_report(matches: &Vec<FileMatch>) {
     for file in matches {
         file.print()
-        // println!("{}:", file.file_name);
-        // for mat in &file.matches {
-        //     println!("{}", mat.text);
-        // }
-        // println!();
     }
 }
-