bin/sym.completion in sym-2.7.0 vs bin/sym.completion in sym-2.8.0

@@ -1,13 +1,28 @@
 #!/usr/bin/env bash
 #
-# Sym command line completion
+# Sym Command Line completion and other utilities
+# 
+# © 2015-2018, Konstantin Gredeskoul,  https://github.com/kigster/sym
 #
-# © 2015-2016, Konstantin Gredeskoul,  https://github.com/kigster/sym
 # MIT LICENSE
 #
+###########################################################################
 
+( [[ -n $ZSH_EVAL_CONTEXT && $ZSH_EVAL_CONTEXT =~ :file$ ]] || \
+  [[ -n $BASH_VERSION && $0 != "$BASH_SOURCE" ]]) && _s_=1 || _s_=0
+
+bash_version=$(/usr/bin/env bash --version | awk '{FS="version"}{print $4}')
+bash_version=${bash_version:0:1}
+
+if [[ "${bash_version}" -lt 4 ]]; then 
+    echo "Sym BASH helpers are incompatible with BASH version 3 or older."
+    echo "Please upgrade your BASH to version 4+ released in 2009. Srsly."
+    (( $_s_ )) && return 1
+    (( $_s_ )) || exit 1
+fi
+
 declare -a bash_completion_locations=(/usr/local/etc/bash_completion /usr/etc/bash_completion /etc/bash_completion)
 loaded=false
 for file in ${bash_completion_locations[@]}; do
     [[ -s $file ]] && {
       source $file
@@ -61,9 +76,56 @@
             ;;
     esac
 
     return 0
 } && complete -F _sym $nospace $filenames sym
+
+sym-encrypt() {
+  local key=$1
+  local from=$2
+  local to=$3
+  local args=
+
+  [[ -n $key ]] && args="${args} -ck ${key}"
+
+  if [[ -n $to ]]; then
+    args="${args} -o ${to}"
+    [[ -n $from ]] && args="${args} -f ${from}"
+  else
+    [[ -n $from ]] && args="${args} -n ${from}"
+  fi
+
+  if [[ -z $args ]]; then
+    echo "usage: sym-encrypt key file [ outfile ]"
+  else
+    sym -e ${args}
+  fi
+}
+
+sym-decrypt() {
+  local key=$1
+  local from=$2
+  local to=$3
+  local args=
+
+  [[ -n $key ]] && args="${args} -ck ${key}"
+
+  if [[ -n $to ]]; then
+    args="${args} -o ${to}"
+    [[ -n $from ]] && args="${args} -f ${from}"
+  else
+    [[ -n $from ]] && args="${args} -n ${from}"
+  fi
+
+  if [[ -z $args ]]; then
+    echo "usage: sym-decrypt key file [ outfile ]"
+  else
+    sym -d ${args}
+  fi
+}
+
+alias syme="sym-encrypt"
+alias symd="sym-decrypt"
 
 # Local variables:
 # mode: shell-script
 # sh-basic-offset: 4
 # sh-indent-comment: t