Add Schema definition changes to support the linter functions

pkg/schema/parse.go

@@ -2,6 +2,8 @@ package schema
 
 import (
 	_ "embed"
+	"fmt"
+	"os"
 	"strings"
 
 	"github.com/jinzhu/inflection"
@@ -22,6 +24,14 @@ func InitDB(sql_schema string) *sqlx.DB {
 	return db
 }
 
+func SchemaFromSQLFile(filepath string) (Schema, error) {
+	sqlBytes, err := os.ReadFile(filepath)
+	if err != nil {
+		return Schema{}, fmt.Errorf("failed to read SQL file: %w", err)
+	}
+	return SchemaFromDB(InitDB(string(sqlBytes))), nil
+}
+
 // SchemaFromDB takes a DB connection, checks its schema metadata tables, and returns a Schema.
 func SchemaFromDB(db *sqlx.DB) Schema {
 	ret := Schema{Tables: map[string]Table{}, Indexes: map[string]Index{}}