Default to regex mode

src/app.rs

@@ -3,6 +3,7 @@ use structopt::StructOpt;
 
 #[derive(Debug, StructOpt)]
 #[structopt(
+    // hide author from help
     author = "",
     raw(setting = "structopt::clap::AppSettings::ColoredHelp"),
     raw(setting = "structopt::clap::AppSettings::NextLineHelp")
@@ -12,15 +13,15 @@ pub(crate) struct Options {
     #[structopt(short = "i", long = "input")]
     file_path: Option<String>,
 
-    /// Enable regular expressions
-    #[structopt(short = "r", long = "regex")]
-    enable_regex: bool,
+    /// Treat expressions as non-regex strings
+    #[structopt(short = "s", long = "string-mode")]
+    literal_mode: bool,
 
-    /// The string or regexp (if --regex) to search for.
+    /// The regexp or string (if --literal) to search for.
     find: String,
 
-    /// What to replace each match with. If regex is enabled,
-    /// you may use captured values like $1, $2, etc.
+    /// What to replace each match with. Unless in string mode, you may 
+    /// use captured values like $1, $2, etc.
     replace_with: String,
 }
 
@@ -28,7 +29,7 @@ pub(crate) fn run() -> Result<(), Error> {
     let args = Options::from_args();
     let source = Source::from(args.file_path);
     let mut stream: Stream = (&source).into_stream()?;
-    stream.replace(args.enable_regex, &args.find, &args.replace_with)?;
+    stream.replace(!args.literal_mode, &args.find, &args.replace_with)?;
 
     // replace file in-place, or pipe to stdout
     stream.output(&source)

src/input.rs

@@ -21,7 +21,6 @@ impl Source {
                 let mut buffer = String::new();
                 let stdin = std::io::stdin();
                 let mut handle = stdin.lock();
-
                 handle.read_to_string(&mut buffer)?;
                 Ok(Stream::new(buffer))
             }