imp: add init-simapp script (cosmos#4844)

* feat: add init-simapp script

* Apply suggestions from code review

Co-authored-by: Damian Nolan <damiannolan@gmail.com>

---------

Co-authored-by: Carlos Rodriguez <carlos@interchain.io>
Co-authored-by: Damian Nolan <damiannolan@gmail.com>
Co-authored-by: Jim Fasarakis-Hilliard <d.f.hilliard@gmail.com>

Makefile

@@ -170,6 +170,13 @@ endif
 ###                           Tests & Simulation                            ###
 ###############################################################################
 
+# make init-simapp initializes a single local node network
+# it is useful for testing and development
+# Usage: make install && make init-simapp && simd start
+# Warning: make init-simapp will remove all data in simapp home directory
+init-simapp:
+	./scripts/init-simapp.sh
+
 test: test-unit
 test-all: test-unit test-ledger-mock test-race test-cover
 

scripts/init-simapp.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+SIMD_BIN=${SIMD_BIN:=$(which simd 2>/dev/null)}
+
+if [ -z "$SIMD_BIN" ]; then echo "SIMD_BIN is not set. Make sure to run make install before"; exit 1; fi
+echo "using $SIMD_BIN"
+if [ -d "$($SIMD_BIN config home)" ]; then rm -r $($SIMD_BIN config home); fi
+$SIMD_BIN config set client chain-id simapp-1
+$SIMD_BIN config set client keyring-backend test
+$SIMD_BIN config set app api.enable true
+$SIMD_BIN keys add alice
+$SIMD_BIN keys add bob
+$SIMD_BIN init test --chain-id simapp-1
+$SIMD_BIN genesis add-genesis-account alice 5000000000stake --keyring-backend test
+$SIMD_BIN genesis add-genesis-account bob 5000000000stake --keyring-backend test
+$SIMD_BIN genesis gentx alice 1000000stake --chain-id simapp-1
+$SIMD_BIN genesis collect-gentxs