Extract loading config to a shared file

cmd/populate_blocks/main.go

@@ -2,11 +2,10 @@ package main
 
 import (
 	"flag"
-	"log"
 
 	"fmt"
 
-	"github.com/8thlight/vulcanizedb/pkg/config"
+	"github.com/8thlight/vulcanizedb/cmd"
 	"github.com/8thlight/vulcanizedb/pkg/geth"
 	"github.com/8thlight/vulcanizedb/pkg/history"
 	"github.com/8thlight/vulcanizedb/pkg/repositories"
@@ -16,13 +15,10 @@ func main() {
 	environment := flag.String("environment", "", "Environment name")
 	startingBlockNumber := flag.Int("starting-number", -1, "First block to fill from")
 	flag.Parse()
-	cfg, err := config.NewConfig(*environment)
-	if err != nil {
-		log.Fatalf("Error loading config\n%v", err)
-	}
+	config := cmd.LoadConfig(*environment)
 
-	blockchain := geth.NewGethBlockchain(cfg.Client.IPCPath)
-	repository := repositories.NewPostgres(cfg.Database)
+	blockchain := geth.NewGethBlockchain(config.Client.IPCPath)
+	repository := repositories.NewPostgres(config.Database)
 	numberOfBlocksCreated := history.PopulateBlocks(blockchain, repository, int64(*startingBlockNumber))
 	fmt.Printf("Populated %d blocks", numberOfBlocksCreated)
 }