From b1dbaa726f280dfbb6131b98fe2cc8621728ef64 Mon Sep 17 00:00:00 2001
From: Jonathan Strong <jstrong@mmcxi.com>
Date: Thu, 16 Mar 2023 23:10:47 -0400
Subject: [PATCH] handle piped input

$ echo "1.2.3" | ./increment_version.sh -p
1.2.4
---
 increment_version.sh | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/increment_version.sh b/increment_version.sh
index bdba2b4..ad77a4a 100755
--- a/increment_version.sh
+++ b/increment_version.sh
@@ -15,7 +15,12 @@ done
 
 shift $(($OPTIND - 1))
 
-version=$1
+if [ -t 0 ]
+then
+    version=$1
+else
+    version=$(cat)
+fi
 
 # Build array from version string.