Initial commit

factory/lib/00_init.sh

@@ -0,0 +1,46 @@
+#!/bin/bash
+set -e
+
+# This is a library file. 
+# It should be 'source'd only, if it is not we bail out here. 
+if [[ "$0" = "$BASH_SOURCE" ]]; then
+   echo "This file should not be executed directly, it should be 'source'd only. "
+   exit 1;
+fi
+
+# Check that we are running on a linux system, to prevent accidentally running on Windows or Mac. 
+# Ideally we would want to explicitly limit to Debian / Ubuntu but at this point that's not needed. 
+OS="$(uname -s)"
+case "${OS}" in
+    Linux*) :;;
+    *)      echo "This script must be run under Linux. "; exit 1;;
+esac
+
+# To prevent accidentally messing up permissions, we need to always run as root. 
+# Check that the uid is 0, and otherwise bail out. 
+if [[ $EUID -ne 0 ]]; then
+   echo "This script should be run as root, use 'sudo' if in doubt. "
+   exit 1;
+fi
+
+# We enable shell aliases, to allow us to setup utility functions much more easily. 
+# To be safe that we don't have any other ones in the environment, we first unalias everything. 
+unalias -a
+shopt -s expand_aliases
+
+# Setup some basic input/output functions
+function log_info() {
+   echo -e "\033[1m$1\033[0m"
+}
+
+function log_ok() {
+   echo -e "\033[0;32m$1\033[0m"
+}
+
+function log_warn() {
+   echo -e "\033[1;33m$1\033[0m"
+}
+
+function log_error() {
+   echo -e "\033[0;31m$1\033[0m"
+}