1 files changed, 68 insertions, 0 deletions
diff --git a/replace.sh b/replace.sh
new file mode 100644
index 000000000..c2b187fda
--- /dev/null
+++ b/replace.sh
@@ -0,0 +1,68 @@
+# Copyright (C) 2013 Jan Engelhardt <jengelh@inai.de>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the
+# Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
+
+# from http://mywiki.wooledge.org/BashFAQ/021
+
+# The ${a/b/c} substitution is not POSIX compatible. Additionally, in
+# bash 3.x, quotes do not escape slashes. This causes screwed up
+# installation paths.
+#
+#     SLES 11, bash-3.2-147.9.13
+#     $ dirname="foo/bar"
+#     $ echo ${dirname//"foo/bar"/"omg/nei"}
+#     bar/omg/nei/bar
+#
+#     openSUSE 12.2, bash-4.2-51.6.1
+#     $ dirname="foo/bar"
+#     $ echo ${dirname//"foo/bar"/"omg/nei"}
+#     omg/nei
+#
+#     openSUSE 12.2, dash-0.5.7-5.1.2.x86_64
+#     $ dirname="foo/bar"
+#     $ echo ${dirname//"foo/bar"/"omg/nei"}
+#     dash: 2: Bad substitution
+#
+# Source this file into your bash scripts to make available
+# a replacement (the string_rep function) for this substitution
+# mess.
+#
+
+string_rep()
+{
+	# initialize vars
+	in=$1
+	unset out
+
+	# SEARCH must not be empty
+	test -n "$2" || return
+
+	while true; do
+		# break loop if SEARCH is no longer in "$in"
+		case "$in" in
+			*"$2"*) : ;;
+			*) break;;
+		esac
+
+		# append everything in "$in", up to the first instance of SEARCH, and REP, to "$out"
+		out=$out${in%%"$2"*}$3
+		# remove everything up to and including the first instance of SEARCH from "$in"
+		in=${in#*"$2"}
+	done
+
+	# append whatever is left in "$in" after the last instance of SEARCH to out, and print
+	printf '%s%s\n' "$out" "$in"
+}