Added automatic database migration.

db/db.go

@@ -0,0 +1,29 @@
+package db
+
+import (
+	"fmt"
+	"github.com/emvi/logbuch"
+	"os"
+	"strconv"
+	"time"
+)
+
+const (
+	connectionString = `host=%s port=%s user=%s password=%s dbname=%s sslmode=%s sslcert=%s sslkey=%s sslrootcert=%s connectTimeout=%s timezone=%s`
+)
+
+func GetConnectionString() string {
+	host := os.Getenv("MB_DB_HOST")
+	port := os.Getenv("MB_DB_PORT")
+	user := os.Getenv("MB_DB_USER")
+	password := os.Getenv("MB_DB_PASSWORD")
+	schema := os.Getenv("MB_DB_SCHEMA")
+	sslMode := os.Getenv("MB_DB_SSLMODE")
+	sslCert := os.Getenv("MB_DB_SSLCERT")
+	sslKey := os.Getenv("MB_DB_SSLKEY")
+	sslRootCert := os.Getenv("MB_DB_SSLROOTCERT")
+	zone, offset := time.Now().Zone()
+	timezone := zone + strconv.Itoa(-offset/3600)
+	logbuch.Info("Setting time zone", logbuch.Fields{"timezone": timezone})
+	return fmt.Sprintf(connectionString, host, port, user, password, schema, sslMode, sslCert, sslKey, sslRootCert, "30", timezone)
+}