feat: introduce GOOSE_MIGRATION_TABLE env variable overiden by `-ta…

…ble` arg

cmd/goose/main.go

@@ -26,7 +26,7 @@ import (
 var (
 	flags        = flag.NewFlagSet("goose", flag.ExitOnError)
 	dir          = flags.String("dir", cfg.DefaultMigrationDir, "directory with migration files")
-	table        = flags.String("table", "goose_db_version", "migrations table name")
+	table        = flags.String("table", cfg.DefaultMigrationTable, "migrations table name")
 	verbose      = flags.Bool("v", false, "enable verbose mode")
 	help         = flags.Bool("h", false, "print help")
 	versionFlag  = flags.Bool("version", false, "print version")
@@ -66,6 +66,16 @@ func main() {
 	if *sequential {
 		goose.SetSequential(true)
 	}
+
+	// read the `.env` or whichever file is pointed, skipping any error
+	_ = godotenv.Load(*envFile)
+
+	// load the cfg from the environment variables
+	cfg.Load()
+
+	if *table == cfg.DefaultMigrationTable || *table == "" {
+		*table = cfg.GOOSEMIGRATIONTABLE
+	}
 	goose.SetTableName(*table)
 
 	args := flags.Args()
@@ -80,12 +90,6 @@ func main() {
 		os.Exit(1)
 	}
 
-	// read the `.env` or whichever file is pointed, skipping any error
-	_ = godotenv.Load(*envFile)
-
-	// load the cfg from the environment variables
-	cfg.Load()
-
 	// The -dir option has not been set, check whether the env variable is set
 	// before defaulting to ".".
 	if *dir == cfg.DefaultMigrationDir && cfg.GOOSEMIGRATIONDIR != "" {

internal/cfg/cfg.go

@@ -7,11 +7,13 @@ var (
 	GOOSEDBSTRING     = ""
 	GOOSEMIGRATIONDIR = DefaultMigrationDir
 	// https://no-color.org/
-	GOOSENOCOLOR = "false"
+	GOOSENOCOLOR        = "false"
+	GOOSEMIGRATIONTABLE = DefaultMigrationTable
 )
 
 var (
-	DefaultMigrationDir = "."
+	DefaultMigrationDir   = "."
+	DefaultMigrationTable = "goose_db_version"
 )
 
 // Load reads the config values from environment,
@@ -22,6 +24,7 @@ func Load() {
 	GOOSEMIGRATIONDIR = envOr("GOOSE_MIGRATION_DIR", GOOSEMIGRATIONDIR)
 	// https://no-color.org/
 	GOOSENOCOLOR = envOr("NO_COLOR", GOOSENOCOLOR)
+	GOOSEMIGRATIONTABLE = envOr("GOOSE_MIGRATION_TABLE", GOOSEMIGRATIONTABLE)
 }
 
 // An EnvVar is an environment variable Name=Value.
@@ -36,6 +39,7 @@ func List() []EnvVar {
 		{Name: "GOOSE_DBSTRING", Value: GOOSEDBSTRING},
 		{Name: "GOOSE_MIGRATION_DIR", Value: GOOSEMIGRATIONDIR},
 		{Name: "NO_COLOR", Value: GOOSENOCOLOR},
+		{Name: "GOOSE_MIGRATION_TABLE", Value: GOOSEMIGRATIONTABLE},
 	}
 }