Add btsync systemd setup script

net-p2p/btsync/files/btsync_setup

@@ -0,0 +1,43 @@
+#!/bin/sh
+#
+# Prestart script run before "/opt/btsync/bin/btsync" that generates a 
+# suitable default configuration if it's not present already.
+#
+# For the root user, it is put at "/etc/btsync.conf" and uses system-wide paths
+# (working folder "/var/lib/btsync" and PID storage in "/run/btsync/").
+#
+# Non-root users get a "$HOME/.btsync/btsync.conf" file and uses a user local path
+# (working folder "$HOME/.btsync" including PID storage).
+#
+
+# Absolute path to this script.
+script_path=$(readlink -f $0)
+# Absolute path this script is in.
+script_folder=$( dirname "${script_path}" )
+script_name=$( basename "${script_path}" )
+
+PN="btsync"
+BTSYNC_PATH="/opt/${PN}"
+
+if [[ $EUID -eq 0 ]]; then
+    STORAGE_PATH="/var/lib/${PN}"
+    CONF_FILE="/etc/${PN}.conf"
+    PID_FILE="/var/run/${PN}.pid"
+else
+    STORAGE_PATH="$HOME.${PN}"
+    CONF_FILE="${STORAGE_PATH}/${PN}.conf"
+    PID_FILE="${STORAGE_PATH}/${PN}.pid"
+    mkdir -p "${STORAGE_PATH}"
+fi
+
+if [ ! -f "${CONF_FILE}" ] ; then
+    "${BTSYNC_PATH}/bin/${PN}" --dump-sample-config > "${CONF_FILE}" || exit 1
+    sed -i \
+        -e "s|\"password\" : \"password\"|\"password\" : \"$(date +%s | sha256sum | base64 | head -c 32)\"|"	\
+        -e "s|\"device_name\": \"My Sync Device\"|\"device_name\": \"$(hostname -f 2>/dev/null||hostname)\"|"	\
+        -e "s|\"login\" : \"admin\"|\"login\" : \"$USER\"|"														\
+        -e "s|\"listen\" : \"0.0.0.0:8888\"|\"listen\" : \"127.0.0.1:$(expr 8888 + $EUID)\"|"						\
+        -e "s|\"storage_path\" : \"/home/user/.sync\"|\"storage_path\" : \"${STORAGE_PATH}\"|"					\
+        -e "/\/\/ uncomment next line if you want to set location of pid file/d" 								\
+        -e "s|\/\/ \"pid_file\" : \"/var/run/${PN}/${PN}.pid\"|   \"pid_file\" : \"${PID_FILE}\"|" "${CONF_FILE}"
+fi