feat(commands): allow configuration via envvars

.gitpod.yml

@@ -65,6 +65,9 @@ tasks:
       go install golang.org/x/tools/cmd/goimports@latest
 
       go install ./...
+    env:
+      GOBBLR_DATABASE: gobblr
+      GOBBLR_PATH: ./examples/simple/data
     command: |
       # Copy .cobra.yaml to $HOME
       cp .cobra.yaml $HOME/.cobra.yaml

cmd/db.go

@@ -20,6 +20,7 @@ import (
 	"fmt"
 	"os"
 	"path"
+	"strings"
 
 	"github.com/mrsimonemms/gobblr/pkg/drivers"
 	"github.com/mrsimonemms/gobblr/pkg/gobblr"
@@ -66,12 +67,30 @@ var dbCmd = &cobra.Command{
 	},
 }
 
+const (
+	envvarPrefix = "GOBBLR"
+)
+
+func bindEnv(key string) {
+	envvarName := fmt.Sprintf("%s_%s", envvarPrefix, key)
+	envvarName = strings.Replace(envvarName, "-", "_", -1)
+	envvarName = strings.ToUpper(envvarName)
+
+	err := viper.BindEnv(key, envvarName)
+	cobra.CheckErr(err)
+}
+
 func init() {
 	rootCmd.AddCommand(dbCmd)
 
 	currentPath, err := os.Getwd()
 	cobra.CheckErr(err)
 
+	bindEnv("path")
+	bindEnv("retries")
+	bindEnv("run")
+	bindEnv("run-port")
+
 	viper.SetDefault("path", path.Join(currentPath, "data"))
 	viper.SetDefault("retries", 0)
 	viper.SetDefault("run", false)

cmd/db_mongodb.go

@@ -41,6 +41,9 @@ var dbMongodbCmd = &cobra.Command{
 func init() {
 	dbCmd.AddCommand(dbMongodbCmd)
 
+	bindEnv("connection-uri")
+	bindEnv("database")
+
 	viper.SetDefault("connection-uri", "mongodb://localhost:27017")
 	dbMongodbCmd.Flags().StringVarP(&dbMongodbOpts.ConnectionURI, "connection-uri", "u", viper.GetString("connection-uri"), "database connection uri")
 	dbMongodbCmd.Flags().StringVarP(&dbMongodbOpts.Database, "database", "d", viper.GetString("database"), "name of the database to use")

cmd/db_sql_mysql.go

@@ -47,6 +47,12 @@ var dbSqlMysqlCmd = &cobra.Command{
 func init() {
 	dbSqlCmd.AddCommand(dbSqlMysqlCmd)
 
+	bindEnv("database")
+	bindEnv("host")
+	bindEnv("password")
+	bindEnv("port")
+	bindEnv("username")
+
 	viper.SetDefault("host", "localhost")
 	viper.SetDefault("port", 3306)
 	viper.SetDefault("username", "root")

cmd/db_sql_postgres.go

@@ -47,6 +47,12 @@ var dbSqlPostgresCmd = &cobra.Command{
 func init() {
 	dbSqlCmd.AddCommand(dbSqlPostgresCmd)
 
+	bindEnv("database")
+	bindEnv("host")
+	bindEnv("password")
+	bindEnv("port")
+	bindEnv("username")
+
 	viper.SetDefault("host", "localhost")
 	viper.SetDefault("port", 5432)
 	viper.SetDefault("username", "postgres")

cmd/db_sql_sqlite.go

@@ -37,6 +37,8 @@ var dbSqlSqliteCmd = &cobra.Command{
 func init() {
 	dbSqlCmd.AddCommand(dbSqlSqliteCmd)
 
+	bindEnv("file")
+
 	viper.SetDefault("file", "sqlite.db")
 	dbSqlSqliteCmd.Flags().StringVarP(&dbSqlSqliteOpts.File, "file", "f", viper.GetString("file"), "SQLite database file")
 }

cmd/db_sql_sqlserver.go

@@ -47,6 +47,12 @@ var dbSqlSqlserverCmd = &cobra.Command{
 func init() {
 	dbSqlCmd.AddCommand(dbSqlSqlserverCmd)
 
+	bindEnv("database")
+	bindEnv("host")
+	bindEnv("password")
+	bindEnv("port")
+	bindEnv("username")
+
 	viper.SetDefault("host", "localhost")
 	viper.SetDefault("port", 1433)
 	viper.SetDefault("username", "sa")