From: Matthijs Kooijman <matthijs@stdin.nl>
Date: Wed, 7 Jan 2009 21:16:24 +0000 (+0100)
Subject: Add strip_prefix function.
X-Git-Url: https://git.stderr.nl/gitweb?a=commitdiff_plain;h=1f3891846c79f57c458e6848958f4f5c5cd08898;p=matthijs%2Fupstream%2Fbackupninja.git

Add strip_prefix function.

This function can be used to remove a given prefix from a string.
---

diff --git a/lib/tools.in b/lib/tools.in
index b180950..4ca438f 100644
--- a/lib/tools.in
+++ b/lib/tools.in
@@ -97,3 +97,11 @@ function starts_with() {
 	# Is it equal to $2?
 	[ "$head" = "$2" ]
 }
+
+# Strip the prefix $2 from $1. Assumes that $1 actually starts with $1.
+# The result is put on stdout.
+function strip_prefix() {
+	# Strip the first ${#2} (the length of $2) characters from $1.
+	# tail -c +N means start at the Nth byte, 1-based, so we add 1.
+	echo $1 | tail -c +$((${#2}+1))
+}