Resolve "FEATURE: Use time stamp from kurisu in update process"

Closes #109 (closed)

• New way of updating the db by re-using fileds when possible
• Check with the repo_timestamp in the repo module instead of getting the file's mtime
• Default the repo_timestamp to the file's mtime at upgrade time

src/database/upgrade.c

@@ -15,21 +15,22 @@ struct sql_table_description {
     const LKT_DATABASE_VERSION minimal_version;
 };
 
-#define DCL_SQL_FIELD(field_name, version)                          \
-    ((struct sql_field_description){ .name            = field_name, \
-                                     .minimal_version = (LKT_DATABASE_VERSION_##version) })
+#define DCL_SQL_FIELD(field_name, version)                                \
+    ((const struct sql_field_description){ .name            = field_name, \
+                                           .minimal_version = (LKT_DATABASE_VERSION_##version) })
 
-#define DCL_SQL_FIELD_NULL ((struct sql_field_description){ .name = NULL, .minimal_version = 0 })
+#define DCL_SQL_FIELD_NULL \
+    ((const struct sql_field_description){ .name = NULL, .minimal_version = 0 })
 
 #define DCL_SQL_TABLE(tbl_name, ...)                            \
-    ((struct sql_table_description){                            \
+    ((const struct sql_table_description){                      \
         .name            = #tbl_name,                           \
         .fields          = { __VA_ARGS__, DCL_SQL_FIELD_NULL }, \
         .minimal_version = LKT_DATABASE_VERSION_ALPHA,          \
     })
 
 #define DCL_SQL_TABLE_VERSION(tbl_name, version, ...)           \
-    ((struct sql_table_description){                            \
+    ((const struct sql_table_description){                      \
         .name            = #tbl_name,                           \
         .fields          = { __VA_ARGS__, DCL_SQL_FIELD_NULL }, \
         .minimal_version = LKT_DATABASE_VERSION_##version,      \
@@ -280,9 +281,10 @@ database_get_version_name(LKT_DATABASE_VERSION version)
 #include <lektor/internal/dbversion.def>
     case ___LKT_DATABASE_VERSION_COUNT:
         LOG_ERROR("DB", "Unknown database version %d", version);
-        return "UNKNOWN";
+        break;
     }
 #undef database_version
+    return "UNKNOWN";
 }
 
 LKT_DATABASE_VERSION