restic formula rewrite and gitea updates

restic/files/install.sh.jinja

@@ -0,0 +1,18 @@
+#!/bin/bash
+{% set arch = 'arm' salt.grains.get(cpuarch).startswith('arm') else 'amd64' %}
+
+if test -z "$RESTIC_VERSION"; then
+  echo "RESTIC_VERSION is not defined"
+  exit 1
+fi
+
+URL="https://github.com/restic/restic/releases/download/v${RESTIC_VERSION}/restic_${RESTIC_VERSION}_linux_{{ arch }}.bz2"
+
+wget --quiet "${URL}" -O - | bzip2 -cd > /bin/restic.tmp
+if [ $? -eq 0 ]; then
+  chmod +x /bin/restic.tmp
+  mv /bin/restic.tmp /bin/restic
+else
+  rm -f /bin/restic.tmp
+  exit 1
+fi