From c1a691d965182c34c56140c56f7ea92cce7cf90c Mon Sep 17 00:00:00 2001
From: Cory Boyd <corytheboyd@gmail.com>
Date: Sun, 7 Feb 2016 14:06:55 -0800
Subject: [PATCH] Check for correct number of arguments.

Otherwise, print some usage info.
---
 git-blame-someone-else | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/git-blame-someone-else b/git-blame-someone-else
index 41590e0..d76642c 100644
--- a/git-blame-someone-else
+++ b/git-blame-someone-else
@@ -1,5 +1,10 @@
 #!/usr/bin/env bash
 
+if [ $# -ne 2 ]; then
+  >&2 echo "Usage: $0 <author> <commit>"
+  exit 1
+fi
+
 AUTHOR=$1
 AUTHOR_NAME=$(echo $AUTHOR | perl -wlne '/^(.*)\s*<.*>$/ and print $1')
 AUTHOR_EMAIL=$(echo $AUTHOR | perl -wlne '/^.*\s*<(.*)>$/ and print $1')
@@ -11,4 +16,4 @@ COMMIT=$(git rev-parse --short $2)
   git rebase --continue
 } &> /dev/null
 
-echo "$AUTHOR_NAME is now the author of $COMMIT. You're officially an asshole.";
\ No newline at end of file
+echo "$AUTHOR_NAME is now the author of $COMMIT. You're officially an asshole.";