Make init.sh re-runnable safely. (#117)

Make it possible to re-run init.sh safely.  If you really want to wipe an existing DB, run `init.sh clean` .

Reviewed-on: cerc-io/laconicd#117
Reviewed-by: David Boreham <dboreham@noreply.git.vdb.to>
Co-authored-by: Thomas E Lackey <telackey@bozemanpass.com>
Co-committed-by: Thomas E Lackey <telackey@bozemanpass.com>

init.sh

@@ -10,13 +10,17 @@ LOGLEVEL="info"
 TRACE="--trace"
 # TRACE=""
 
+if [ "$1" == "clean" ] || [ ! -d "$HOME/.laconicd/data/blockstore.db" ]; then
   # validate dependencies are installed
   command -v jq > /dev/null 2>&1 || { echo >&2 "jq not installed. More info: https://stedolan.github.io/jq/download/"; exit 1; }
 
   # remove existing daemon and client
-rm -rf ~/.laconic*
+  rm -rf $HOME/.laconicd/*
+  rm -rf $HOME/.laconic/*
 
+  if [ -n "`which make`" ]; then
     make install
+  fi
 
   laconicd config keyring-backend $KEYRING
   laconicd config chain-id $CHAINID
@@ -109,6 +113,9 @@ laconicd validate-genesis
   if [[ $1 == "pending" ]]; then
     echo "pending mode is on, please wait for the first block committed."
   fi
+else
+  echo "Using existing database at $HOME/.laconicd.  To replace, run '`basename $0` clean'"
+fi
 
 # Start the node (remove the --pruning=nothing flag if historical queries are not needed)
 laconicd start --pruning=nothing --evm.tracer=json $TRACE --log_level $LOGLEVEL --minimum-gas-prices=0.0001aphoton --json-rpc.api eth,txpool,personal,net,debug,web3,miner --api.enable --gql-server --gql-playground