introduced distro version detection and automatic system dependent configuration loading

lib/version.sh

@@ -0,0 +1,56 @@
+# ------------------------------------------------------------------------------
+# Version determination function
+# This file is part of the init.sh project
+# Copyright (c) 2019-2021 Geoffray Levasseur <fatalerrors@geoffray-levasseur.org>
+# ------------------------------------------------------------------------------
+# This file is distributed under 3-clause BSD license.
+# The complete license agreement can be obtained at:
+# https://opensource.org/licenses/BSD-3-Clause
+# ------------------------------------------------------------------------------
+
+# ------------------------------------------------------------------------------
+# Return on stdout $distro $version $codename
+read_os_release()
+{
+    if [[ ! -f /etc/os-release ]]; then
+        prnt E "Your distribution doesn't have the needed os-release file."
+        die 8 --force
+    fi
+
+    # Create a sub-shell to avoid polluting the environnement
+    (
+        # Iniitalise version codename in case the var don't exists
+        VERSION_CODENAME="NULL"
+        
+        # Import the file in the environment
+        source /etc/os-release
+
+        if [[ -z $ID || -z $VERSION_ID ]]; then
+            prnt E "Your /etc/os-release file mises some vital information."
+            die --force 8
+        fi
+        
+        # Return values on standard stdout
+        echo ${ID,,} ${VERSION_ID} ${VERSION_CODENAME,,}
+        #prnt I "OS is: ${ID,,} ${VERSION_ID} ${VERSION_CODENAME,,}"
+    )
+}
+export read_os_release
+
+
+# ------------------------------------------------------------------------------
+# Create system related variables
+# ------------------------------------------------------------------------------
+get_os_version()
+{
+    if [[ $# -ne 3 ]]; then
+        prnt E "get_os_version(): incorect number of parameters ($@)."
+        die 7 --force
+    fi
+    
+    export SYS_DIST=$1
+    export SYS_VER=$2
+    if [[ $3 != "null" ]]; then
+        export SYS_CODE=$3
+    fi
+}