From d591867b356566bb419433cca8fab8de5ed01104 Mon Sep 17 00:00:00 2001
From: Sam Stephenson <sam@37signals.com>
Date: Fri, 30 Dec 2011 14:12:15 -0600
Subject: [PATCH] Add -v/--version

---
 libexec/bats   | 13 ++++++++++++-
 test/bats.bats |  8 +++++++-
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/libexec/bats b/libexec/bats
index 9a22cfa..67f9ab3 100755
--- a/libexec/bats
+++ b/libexec/bats
@@ -1,6 +1,10 @@
 #!/usr/bin/env bash
 set -e
 
+version() {
+  echo "Bats 0.1.0"
+}
+
 resolve_link() {
   $(type -p greadlink readlink | head -1) "$1"
 }
@@ -31,9 +35,16 @@ BATS_LIBEXEC="$(abs_dirname "$0")"
 export BATS_PREFIX="$(abs_dirname "$BATS_LIBEXEC")"
 export PATH="$BATS_LIBEXEC:$PATH"
 
+if [ "$1" = "-v" ] || [ "$1" = "--version" ]; then
+  version
+  exit 0
+fi
+
 filename="$1"
 if [ -z "$filename" ]; then
-  echo "usage: $0 <filename>" >&2
+  { version
+    echo "usage: $0 <filename>"
+  } >&2
   exit 1
 else
   shift
diff --git a/test/bats.bats b/test/bats.bats
index 8a57b55..f230ab3 100755
--- a/test/bats.bats
+++ b/test/bats.bats
@@ -10,7 +10,13 @@ teardown() {
 @test "no arguments prints usage instructions" {
   run bats
   [ $status -eq 1 ]
-  [ $(expr "$output" : "usage:") -ne 0 ]
+  [ $(expr "${lines[1]}" : "usage:") -ne 0 ]
+}
+
+@test "-v and --version print version number" {
+  run bats -v
+  [ $status -eq 0 ]
+  [ $(expr "$output" : "Bats [0-9][0-9.]*") -ne 0 ]
 }
 
 @test "invalid filename prints an error" {