Merge pull request #1557 from ucomesdag/master

Added a sudo plugin

plugins/available/sudo.plugin.bash

@@ -0,0 +1,22 @@
+cite about-plugin
+about-plugin 'Toggle sudo at the beginning of the current or the previous command by hitting the ESC key twice'
+
+function sudo-command-line() {
+  about "toggle sudo at the beginning of the current or the previous command by hitting the ESC key twice"
+  group "sudo"
+
+  [[ ${#READLINE_LINE} -eq 0 ]] && READLINE_LINE=$(fc -l -n -1 | xargs)
+  if [[ $READLINE_LINE == sudo\ * ]]; then
+    READLINE_LINE="${READLINE_LINE#sudo }"
+  else
+    READLINE_LINE="sudo $READLINE_LINE"
+  fi
+  READLINE_POINT=${#READLINE_LINE}
+}
+
+# Define shortcut keys: [Esc] [Esc]
+
+# Readline library requires bash version 4 or later
+if [ "${BASH_VERSINFO}" -ge 4 ]; then
+  bind -x '"\e\e": sudo-command-line'
+fi