lxc-alpine: avoid GNU BRE extensions for better portability

Signed-off-by: Kaarle Ritvanen <kaarle.ritvanen@datakunkku.fi>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

diff --git a/templates/lxc-alpine.in b/templates/lxc-alpine.in
index 6dcc51b2a9c64ffb93cb5e30b4203f406d5416b9..d62f891c94a216d950e980e45949e322494c918e 100644 (file)
--- a/templates/lxc-alpine.in
+++ b/templates/lxc-alpine.in
@@ -109,7 +109,7 @@ install_alpine() {
     else
         cp /etc/apk/repositories "$rootfs"/etc/apk/repositories || return 1
         if [ -n "$release" ]; then
-            sed -i -e "s:/[^/]\+/\([^/]\+\)$:/$release/\1:" \
+            sed -E -i "s:/[^/]+/([^/]+)$:/$release/\\1:" \
                 "$rootfs"/etc/apk/repositories
         fi
     fi