Fix leading hypen bug by updating clap.

Fixes #270

Cargo.toml

@@ -26,7 +26,7 @@ path = "tests/tests.rs"
 
 [dependencies]
 bytecount = "0.1.4"
-clap = "~2.18.0"
+clap = "~2.19.0"
 ctrlc = "2.0"
 env_logger = "0.3"
 grep = { version = "0.1.4", path = "grep" }

src/app.rs

@@ -1,6 +1,6 @@
 use std::collections::HashMap;
 
-use clap::{App, AppSettings, Arg};
+use clap::{App, AppSettings, Arg, ArgSettings};
 
 const ABOUT: &'static str = "
 ripgrep (rg) recursively searches your current directory for a regex pattern.
@@ -74,6 +74,7 @@ fn app<F>(next_line_help: bool, doc: F) -> App<'static, 'static>
         .arg(arg("path").multiple(true))
         .arg(flag("regexp").short("e")
              .takes_value(true).multiple(true).number_of_values(1)
+             .set(ArgSettings::AllowLeadingHyphen)
              .value_name("pattern"))
         .arg(flag("files")
              // This should also conflict with `pattern`, but the first file

tests/tests.rs

@@ -1263,6 +1263,18 @@ fn regression_64() {
     assert_eq!(lines, path("foo/abc\n"));
 }
 
+// See: https://github.com/BurntSushi/ripgrep/issues/270
+#[test]
+fn regression_270() {
+    let wd = WorkDir::new("regression_270");
+    wd.create("foo", "-test");
+
+    let mut cmd = wd.command();
+    cmd.arg("-e").arg("-test");
+    let lines: String = wd.stdout(&mut cmd);
+    assert_eq!(lines, path("foo:-test\n"));
+}
+
 #[test]
 fn type_list() {
     let wd = WorkDir::new("type_list");