db.sh

db.sh

#!/bin/sh

# via: http://capotej.com/blog/2012/10/07/an-embedded-key-value-store-for-shell-scripts/

DBFILE=example.db

put(){
  echo "export kv_$1=$2" >> $DBFILE
}

del(){
  echo "unset kv_$1" >> $DBFILE
}

get(){
  source $DBFILE
  eval r=\$$(echo "kv_$1")
  echo $r
}

list(){
  source $DBFILE
  for i in $(env | grep "kv_" | cut -d= -f1 ); do
    eval r=\$$i; echo $(echo $i | sed -e 's/kv_//') $r;
  done
}

## cmd dispatch

if [ ${1:-0} == "set" ]; then
  put $2 $3
elif [ ${1:-0} == "get" ] ; then
  get $2
elif [ ${1:-0} == "list" ] ; then
  list
elif [ ${1:-0} == "del" ] ; then
  del $2
else
  echo "unknown cmd"
fi