Take config through env.

cmd/root.go

@@ -19,11 +19,14 @@ package cmd
 import (
 	"fmt"
 	"os"
+	"path/filepath"
 	"strings"
 
+	"github.com/joho/godotenv"
 	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
+
 	"github.com/vulcanize/ipld-eth-server/pkg/prom"
 )
 
@@ -121,14 +124,21 @@ func init() {
 }
 
 func initConfig() {
-	if cfgFile != "" {
-		viper.SetConfigFile(cfgFile)
-		if err := viper.ReadInConfig(); err == nil {
-			log.Printf("Using config file: %s", viper.ConfigFileUsed())
-		} else {
-			log.Fatal(fmt.Sprintf("Couldn't read config file: %s", err.Error()))
-		}
-	} else {
+	if cfgFile == "" {
 		log.Warn("No config file passed with --config flag")
+		return
+	}
+
+	viper.SetConfigFile(cfgFile)
+	if err := viper.ReadInConfig(); err != nil {
+		log.Fatalf("Couldn't read config file: %s", err.Error())
+	}
+
+	log.Infof("Using config file: %s", viper.ConfigFileUsed())
+
+	if filepath.Ext(cfgFile) == ".env" {
+		if err := godotenv.Load(cfgFile); err != nil {
+			log.Fatalf("Failed to set environment variable from config file: %s", err.Error())
+		}
 	}
 }

go.mod

@@ -7,13 +7,12 @@ require (
 	github.com/fsnotify/fsnotify v1.5.1 // indirect
 	github.com/graph-gophers/graphql-go v0.0.0-20201113091052-beb923fada29
 	github.com/ipfs/go-block-format v0.0.3
-	github.com/ipfs/go-blockservice v0.1.7
 	github.com/ipfs/go-cid v0.0.7
-	github.com/ipfs/go-ipfs v0.10.0
 	github.com/ipfs/go-ipfs-blockstore v1.0.1
 	github.com/ipfs/go-ipfs-ds-help v1.0.0
 	github.com/ipfs/go-ipld-format v0.2.0
 	github.com/jmoiron/sqlx v1.2.0
+	github.com/joho/godotenv v1.4.0
 	github.com/lib/pq v1.10.4
 	github.com/machinebox/graphql v0.2.2
 	github.com/mailgun/groupcache/v2 v2.2.1

go.sum

@@ -754,6 +754,8 @@ github.com/jmespath/go-jmespath v0.4.0/go.mod h1:T8mJZnbsbmF+m6zOOFylbeCJqk5+pHW
 github.com/jmespath/go-jmespath/internal/testify v1.5.1/go.mod h1:L3OGu8Wl2/fWfCI6z80xFu9LTZmf1ZRjMHUOPmWr69U=
 github.com/jmoiron/sqlx v1.2.0 h1:41Ip0zITnmWNR/vHV+S4m+VoUivnWY5E4OJfLZjCJMA=
 github.com/jmoiron/sqlx v1.2.0/go.mod h1:1FEQNm3xlJgrMD+FBdI9+xvCksHtbpVBBw5dYhBSsks=
+github.com/joho/godotenv v1.4.0 h1:3l4+N6zfMWnkbPEXKng2o2/MR5mSwTrBih4ZEkkz1lg=
+github.com/joho/godotenv v1.4.0/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
 github.com/jonboulle/clockwork v0.1.0/go.mod h1:Ii8DK3G1RaLaWxj9trq07+26W01tbo22gdxWY5EU2bo=
 github.com/jpillora/backoff v1.0.0/go.mod h1:J/6gKK9jxlEcS3zixgDgUAsiuZ7yrSoa/FX5e0EB2j4=
 github.com/jrick/logrotate v1.0.0/go.mod h1:LNinyqDIJnpAur+b8yyulnQw/wDuN1+BYKlTRt3OuAQ=