second commit

lib/functions.sh

@@ -0,0 +1,46 @@
+#!/bin/bash
+
+##
+# return 0 (true) if array (passed by name) contains element
+# usage:
+#   ARRAY = ( a b c )
+#   containsElement ARRAY 'a' => 0
+containsElement() {
+  local -a 'arraykeys=("${!'"$1"'[@]}")'
+  if $(isArray $1); then
+    for index in ${arraykeys[*]}; do
+      current=$1"[$index]"
+      [[ "${!current}" == "$2" ]] && return 0 # found
+    done
+    return 1 # not found
+  else
+    echo >&2 "ERROR: $1 not an array!"
+    return 2 # not an array
+  fi
+}
+
+isArray() {
+  [[ "$(declare -p $1 2>/dev/null)" =~ "declare -a" ]] && return 0 # is an array
+  return 1                                                         # not an array
+}
+
+##
+#
+askConfirmation() {
+  case "$1" in
+  y | Y | yes | YES)
+    QUESTION="(Y/n)?"
+    DEFAULT=0
+    ;;
+  *)
+    QUESTION="(y/N)?"
+    DEFAULT=1
+    ;;
+  esac
+  read -p "$QUESTION : " choice
+  case "$choice" in
+  y | Y | yes | YES) return 0 ;; #true
+  n | no | N | NO) return 1 ;;   #false
+  *) return $DEFAULT ;;
+  esac
+}