From: Matthijs Kooijman <matthijs@stdin.nl>
Date: Wed, 7 Jan 2009 20:56:18 +0000 (+0100)
Subject: Add starts_with function.
X-Git-Url: https://git.stderr.nl/gitweb?a=commitdiff_plain;h=ac915b2a77c0bcbcacc8b07042c7d3d2eeebb79a;p=matthijs%2Fupstream%2Fbackupninja.git

Add starts_with function.

This function compares two strings (paths) and checks if the first
starts with the second (the first path lies within the second).
---

diff --git a/lib/tools.in b/lib/tools.in
index fe7d54a..b180950 100644
--- a/lib/tools.in
+++ b/lib/tools.in
@@ -89,3 +89,11 @@ function interpolate() {
 	# Do the actual interpolation
 	echo $path | sed "$expr"
 }
+
+# Does the $1 start with $2 ?
+function starts_with() {
+	# Get the head of $1 as long as $2
+	head=`echo $1 | head -c ${#2}`
+	# Is it equal to $2?
+	[ "$head" = "$2" ]
+}