Add script for formatting the tf moved lines

tf/environments/prod/scripts/format_moved.py

@@ -0,0 +1,105 @@
+"""
+This script aid the creation of the moved {} lines in terrafrom while refactoring.
+
+You shall run it either pasting the output of
+
+terraform plan | grep "created\|destroyed"
+
+into the SAMPLE_LINES, or directly by doing
+
+terraform plan | grep "created\|destroyed" | python3 scripts/format_moved.py
+"""
+
+SAMPLE_LINES = """
+  # aws_alb.oonidataapi will be destroyed
+  # aws_alb_listener.front_end will be destroyed
+  # aws_alb_listener.front_end_https will be destroyed
+  # aws_alb_target_group.oonidataapi will be destroyed
+  # aws_autoscaling_group.app will be destroyed
+  # aws_cloudwatch_log_group.app will be destroyed
+  # aws_ecs_service.oonidataapi will be destroyed
+  # aws_ecs_task_definition.oonidataapi will be destroyed
+  # aws_iam_instance_profile.app will be destroyed
+  # aws_iam_role.app_instance will be destroyed
+  # aws_iam_role.ecs_service will be destroyed
+  # aws_iam_role.ecs_task will be destroyed
+  # aws_iam_role_policy.ecs_service will be destroyed
+  # aws_iam_role_policy.ecs_task will be destroyed
+  # aws_iam_role_policy.instance will be destroyed
+  # aws_launch_template.app will be destroyed
+  # aws_security_group.instance_sg will be destroyed
+  # aws_security_group.lb_sg will be destroyed
+  # aws_security_group.ooniapi will be created
+  # module.ooni_dataapi.aws_alb.oonidataapi will be created
+  # module.ooni_dataapi.aws_alb_listener.front_end will be created
+  # module.ooni_dataapi.aws_alb_listener.front_end_https will be created
+  # module.ooni_dataapi.aws_alb_target_group.oonidataapi will be created
+  # module.ooni_dataapi.aws_autoscaling_group.app will be created
+  # module.ooni_dataapi.aws_cloudwatch_log_group.app will be created
+  # module.ooni_dataapi.aws_ecs_service.oonidataapi will be created
+  # module.ooni_dataapi.aws_ecs_task_definition.oonidataapi will be created
+  # module.ooni_dataapi.aws_iam_instance_profile.app will be created
+  # module.ooni_dataapi.aws_iam_role.app_instance will be created
+  # module.ooni_dataapi.aws_iam_role.ecs_service will be created
+  # module.ooni_dataapi.aws_iam_role.ecs_task will be created
+  # module.ooni_dataapi.aws_iam_role_policy.ecs_service will be created
+  # module.ooni_dataapi.aws_iam_role_policy.ecs_task will be created
+  # module.ooni_dataapi.aws_iam_role_policy.instance will be created
+  # module.ooni_dataapi.aws_launch_template.app will be created
+  # module.ooni_dataapi.aws_security_group.instance will be created
+  # module.ooni_dataapi.aws_security_group.web will be created
+"""
+
+import sys
+
+
+def find_most_similar(destroy_lines, create_line):
+    no_mod_name = ".".join(create_line.split(".")[2:])
+    for l in destroy_lines:
+        if no_mod_name == l:
+            return l
+
+    just_resource = no_mod_name.split(".")[0]
+    for l in destroy_lines:
+        if l.startswith(just_resource):
+            return l
+    return None
+
+def format_moved(name_from, name_to):
+    return f"""
+moved {{
+    from = {name_from}
+    to = {name_to}
+}}
+"""
+
+def get_create_destroy_lines():
+    destroy_lines = []
+    create_lines = []
+
+    #for line in SAMPLE_LINES.split("\n"):
+    for line in sys.stdin:
+        line = line.strip()
+        if line == "":
+            continue
+        if line.endswith("will be destroyed"):
+            destroy_lines.append(line.split(" ")[1])
+        if line.endswith("will be created"):
+            create_lines.append(line.split(" ")[1])
+    return create_lines, destroy_lines
+
+def main():
+    create_lines, destroy_lines = get_create_destroy_lines()
+
+    for create_rsrc in create_lines:
+        most_similar = find_most_similar(destroy_lines, create_rsrc)
+        if most_similar:
+            destroy_lines.remove(most_similar)
+
+        print(format_moved(most_similar, create_rsrc))
+
+    for l in destroy_lines:
+        print(format_moved(l, None))
+
+if __name__ == "__main__":
+    main()