diff --git a/README.md b/README.md
index 51c83ab38..77fe0d006 100644
--- a/README.md
+++ b/README.md
@@ -187,6 +187,18 @@ Lua 5.1.4 (LuaJIT 2.1.0-beta3)
 If you have problems with osm2pgsql or want to report a bug, go to
 https://osm2pgsql.org/support/ .
 
+## License
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
 ## Contributing
 
 We welcome contributions to osm2pgsql. See [CONTRIBUTING.md](CONTRIBUTING.md)
diff --git a/flex-config/README.md b/flex-config/README.md
index aff48055e..280d81b97 100644
--- a/flex-config/README.md
+++ b/flex-config/README.md
@@ -1,4 +1,3 @@
-
 # Flex Output Configuration
 
 **The flex output is experimental. Everything in here is subject to change.**
@@ -48,3 +47,8 @@ source](https://github.com/kikito/inspect.lua) or using
 [LuaRocks](https://luarocks.org/modules/kikito/inspect). Debian/Ubuntu users
 can install the `lua-inspect` package.
 
+## Public Domain
+
+All the example config files in this directory are released into the Public
+Domain. You may use them in any way you like.
+
diff --git a/flex-config/compatible.lua b/flex-config/compatible.lua
index 50126f5a0..3da77156a 100644
--- a/flex-config/compatible.lua
+++ b/flex-config/compatible.lua
@@ -1,3 +1,4 @@
+-- This config example file is released into the Public Domain.
 
 -- This configuration for the flex output tries to be compatible with the
 -- original pgsql C transform output. There might be some corner cases but
diff --git a/flex-config/data-types.lua b/flex-config/data-types.lua
index 402ad7e5f..5afe65f30 100644
--- a/flex-config/data-types.lua
+++ b/flex-config/data-types.lua
@@ -1,3 +1,4 @@
+-- This config example file is released into the Public Domain.
 
 -- This is a very simple Lua config for the Flex Backend not intended for
 -- real-world use. Look at and understand "simple.lua" first, before looking
diff --git a/flex-config/generic.lua b/flex-config/generic.lua
index 15f2523da..40c759f29 100644
--- a/flex-config/generic.lua
+++ b/flex-config/generic.lua
@@ -1,3 +1,4 @@
+-- This config example file is released into the Public Domain.
 
 -- This is a generic configuration that is a good starting point for
 -- real-world projects. Data is split into tables according to geometry type
diff --git a/flex-config/geometries.lua b/flex-config/geometries.lua
index c8d74282c..b651ab739 100644
--- a/flex-config/geometries.lua
+++ b/flex-config/geometries.lua
@@ -1,3 +1,4 @@
+-- This config example file is released into the Public Domain.
 
 -- This is a very simple Lua config for the Flex Backend not intended for
 -- real-world use. Look at and understand "simple.lua" first, before looking
diff --git a/flex-config/places.lua b/flex-config/places.lua
index 61fb1383b..0c6667593 100644
--- a/flex-config/places.lua
+++ b/flex-config/places.lua
@@ -1,3 +1,4 @@
+-- This config example file is released into the Public Domain.
 
 -- This example shows how you can use JSON and JSONB columns in your database.
 
diff --git a/flex-config/route-relations.lua b/flex-config/route-relations.lua
index 7a83e1ed6..61a095b0d 100644
--- a/flex-config/route-relations.lua
+++ b/flex-config/route-relations.lua
@@ -1,3 +1,4 @@
+-- This config example file is released into the Public Domain.
 
 -- This file shows how to use multi-stage processing to bring tags from
 -- relations into ways.
diff --git a/flex-config/simple.lua b/flex-config/simple.lua
index 6c8a37d94..a9f1d5035 100644
--- a/flex-config/simple.lua
+++ b/flex-config/simple.lua
@@ -1,3 +1,4 @@
+-- This config example file is released into the Public Domain.
 
 -- This is a very simple Lua config for the Flex Backend not intended for
 -- real-world use. Use it do understand the basic principles of the
diff --git a/flex-config/unitable.lua b/flex-config/unitable.lua
index 60da163d1..715b5612e 100644
--- a/flex-config/unitable.lua
+++ b/flex-config/unitable.lua
@@ -1,3 +1,4 @@
+-- This config example file is released into the Public Domain.
 
 -- Put all OSM data into a single table
 
diff --git a/flex-config/with-schema.lua b/flex-config/with-schema.lua
index 5c25bd755..085da784d 100644
--- a/flex-config/with-schema.lua
+++ b/flex-config/with-schema.lua
@@ -1,3 +1,4 @@
+-- This config example file is released into the Public Domain.
 
 -- This configuration for the flex output shows how to define a table in
 -- a PostgreSQL schema.
diff --git a/src/db-check.cpp b/src/db-check.cpp
index 8dc794fc5..b450f27e0 100644
--- a/src/db-check.cpp
+++ b/src/db-check.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "db-check.hpp"
 #include "logging.hpp"
 #include "pgsql.hpp"
diff --git a/src/db-check.hpp b/src/db-check.hpp
index 63663415c..8a7a787ea 100644
--- a/src/db-check.hpp
+++ b/src/db-check.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_DB_CHECK_HPP
 #define OSM2PGSQL_DB_CHECK_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "options.hpp"
 
 /**
diff --git a/src/db-copy-mgr.hpp b/src/db-copy-mgr.hpp
index 804b97a2f..0e12c375f 100644
--- a/src/db-copy-mgr.hpp
+++ b/src/db-copy-mgr.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_DB_COPY_MGR_HPP
 #define OSM2PGSQL_DB_COPY_MGR_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <cassert>
 #include <memory>
 #include <string>
diff --git a/src/db-copy.cpp b/src/db-copy.cpp
index 8f254684e..89ace6946 100644
--- a/src/db-copy.cpp
+++ b/src/db-copy.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <cassert>
 
 #include "db-copy.hpp"
diff --git a/src/db-copy.hpp b/src/db-copy.hpp
index dfae01ec1..f5cb8a46a 100644
--- a/src/db-copy.hpp
+++ b/src/db-copy.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_DB_COPY_HPP
 #define OSM2PGSQL_DB_COPY_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <condition_variable>
 #include <deque>
 #include <future>
diff --git a/src/dependency-manager.cpp b/src/dependency-manager.cpp
index 4eaf39e41..aaf748d33 100644
--- a/src/dependency-manager.cpp
+++ b/src/dependency-manager.cpp
@@ -1,3 +1,11 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
 
 #include "dependency-manager.hpp"
 #include "middle.hpp"
diff --git a/src/dependency-manager.hpp b/src/dependency-manager.hpp
index 37666e416..71754ae30 100644
--- a/src/dependency-manager.hpp
+++ b/src/dependency-manager.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_DEPENDENCY_MANAGER_HPP
 #define OSM2PGSQL_DEPENDENCY_MANAGER_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "osmtypes.hpp"
 
 #include <osmium/index/id_set.hpp>
diff --git a/src/domain-matcher.hpp b/src/domain-matcher.hpp
index 34bb21552..58b93d837 100644
--- a/src/domain-matcher.hpp
+++ b/src/domain-matcher.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_DOMAIN_MATCHER_HPP
 #define OSM2PGSQL_DOMAIN_MATCHER_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <osmium/osm/tag.hpp>
 
 #include <cstring>
diff --git a/src/expire-tiles.cpp b/src/expire-tiles.cpp
index 86fb57ee4..1df95fa64 100644
--- a/src/expire-tiles.cpp
+++ b/src/expire-tiles.cpp
@@ -1,8 +1,15 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 /*
  * Dirty tile list generation
  *
- * Steve Hill <steve@nexusuk.org>
- *
  * Please refer to the OpenPisteMap expire_tiles.py script for a demonstration
  * of how to make use of the output:
  * http://subversion.nexusuk.org/projects/openpistemap/trunk/scripts/expire_tiles.py
diff --git a/src/expire-tiles.hpp b/src/expire-tiles.hpp
index 0e9a82628..7cd8b6a1b 100644
--- a/src/expire-tiles.hpp
+++ b/src/expire-tiles.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_EXPIRE_TILES_HPP
 #define OSM2PGSQL_EXPIRE_TILES_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <memory>
 #include <unordered_set>
 
diff --git a/src/flex-table-column.cpp b/src/flex-table-column.cpp
index c2fa448bd..5fd58c32a 100644
--- a/src/flex-table-column.cpp
+++ b/src/flex-table-column.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "flex-table-column.hpp"
 
 #include <algorithm>
diff --git a/src/flex-table-column.hpp b/src/flex-table-column.hpp
index bcf0748c5..28739636e 100644
--- a/src/flex-table-column.hpp
+++ b/src/flex-table-column.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_FLEX_TABLE_COLUMN_HPP
 #define OSM2PGSQL_FLEX_TABLE_COLUMN_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "format.hpp"
 #include "reprojection.hpp"
 
diff --git a/src/flex-table.cpp b/src/flex-table.cpp
index 2160d815e..b0510723e 100644
--- a/src/flex-table.cpp
+++ b/src/flex-table.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "flex-table.hpp"
 #include "format.hpp"
 #include "logging.hpp"
diff --git a/src/flex-table.hpp b/src/flex-table.hpp
index 9a64378bc..1b71118d1 100644
--- a/src/flex-table.hpp
+++ b/src/flex-table.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_FLEX_TABLE_HPP
 #define OSM2PGSQL_FLEX_TABLE_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "db-copy-mgr.hpp"
 #include "flex-table-column.hpp"
 #include "osmium-builder.hpp"
diff --git a/src/format.hpp b/src/format.hpp
index 922b6ef84..4d3efa68c 100644
--- a/src/format.hpp
+++ b/src/format.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_FORMAT_HPP
 #define OSM2PGSQL_FORMAT_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #define FMT_HEADER_ONLY
 #include <fmt/format.h>
 
diff --git a/src/gazetteer-style.cpp b/src/gazetteer-style.cpp
index a6a008006..c615a1685 100644
--- a/src/gazetteer-style.cpp
+++ b/src/gazetteer-style.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <algorithm>
 #include <cstring>
 #include <stdexcept>
diff --git a/src/gazetteer-style.hpp b/src/gazetteer-style.hpp
index 81d242e65..b7bd947f2 100644
--- a/src/gazetteer-style.hpp
+++ b/src/gazetteer-style.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_GAZETTEER_STYLE_HPP
 #define OSM2PGSQL_GAZETTEER_STYLE_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <memory>
 #include <string>
 #include <tuple>
diff --git a/src/geom-transform.cpp b/src/geom-transform.cpp
index eda8f792e..04d1b5e4d 100644
--- a/src/geom-transform.cpp
+++ b/src/geom-transform.cpp
@@ -1,3 +1,11 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
 
 #include "geom-transform.hpp"
 #include "logging.hpp"
diff --git a/src/geom-transform.hpp b/src/geom-transform.hpp
index bad82900a..34584cc94 100644
--- a/src/geom-transform.hpp
+++ b/src/geom-transform.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_GEOM_TRANSFORM_HPP
 #define OSM2PGSQL_GEOM_TRANSFORM_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "flex-table-column.hpp"
 #include "osmium-builder.hpp"
 
diff --git a/src/geometry-processor.cpp b/src/geometry-processor.cpp
index 22324c411..a2debbb07 100644
--- a/src/geometry-processor.cpp
+++ b/src/geometry-processor.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "format.hpp"
 #include "geometry-processor.hpp"
 #include "middle.hpp"
diff --git a/src/geometry-processor.hpp b/src/geometry-processor.hpp
index 020dac548..2952ef7ca 100644
--- a/src/geometry-processor.hpp
+++ b/src/geometry-processor.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_GEOMETRY_PROCESSOR_HPP
 #define OSM2PGSQL_GEOMETRY_PROCESSOR_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <cstddef>
 #include <memory>
 #include <string>
diff --git a/src/input.cpp b/src/input.cpp
index 34eadbeeb..e7dd694c1 100644
--- a/src/input.cpp
+++ b/src/input.cpp
@@ -1,3 +1,11 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
 
 #include <memory>
 #include <queue>
diff --git a/src/input.hpp b/src/input.hpp
index 694234b96..a8d7095de 100644
--- a/src/input.hpp
+++ b/src/input.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_INPUT_HPP
 #define OSM2PGSQL_INPUT_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 /**
  * \file
  *
diff --git a/src/logging.cpp b/src/logging.cpp
index 9127abf95..30b554923 100644
--- a/src/logging.cpp
+++ b/src/logging.cpp
@@ -1,3 +1,11 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
 
 #include "logging.hpp"
 
diff --git a/src/logging.hpp b/src/logging.hpp
index 6a5b93bf4..cf3c6580b 100644
--- a/src/logging.hpp
+++ b/src/logging.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_LOGGING_HPP
 #define OSM2PGSQL_LOGGING_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "format.hpp"
 
 #include <osmium/util/file.hpp>
diff --git a/src/lua-init.hpp b/src/lua-init.hpp
index ea7edb64d..790c63a81 100644
--- a/src/lua-init.hpp
+++ b/src/lua-init.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_LUA_INIT_HPP
 #define OSM2PGSQL_LUA_INIT_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 char const *lua_init() noexcept;
 
 #endif // OSM2PGSQL_LUA_INIT_HPP
diff --git a/src/lua-utils.cpp b/src/lua-utils.cpp
index d166b0a9e..157388e87 100644
--- a/src/lua-utils.cpp
+++ b/src/lua-utils.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "config.h"
 #include "lua-utils.hpp"
 #include "format.hpp"
diff --git a/src/lua-utils.hpp b/src/lua-utils.hpp
index bdbe857b6..1bbce7f58 100644
--- a/src/lua-utils.hpp
+++ b/src/lua-utils.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_FLEX_LUA_HPP
 #define OSM2PGSQL_FLEX_LUA_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 // This file contains helper functions for talking to Lua. It is used from
 // the flex output backend. All functions start with "luaX_".
 
diff --git a/src/middle-pgsql.cpp b/src/middle-pgsql.cpp
index e438a9ada..9d76a6319 100644
--- a/src/middle-pgsql.cpp
+++ b/src/middle-pgsql.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 /* Implements the mid-layer processing for osm2pgsql
  * using several PostgreSQL tables
  *
diff --git a/src/middle-pgsql.hpp b/src/middle-pgsql.hpp
index 1d3162025..b5096524c 100644
--- a/src/middle-pgsql.hpp
+++ b/src/middle-pgsql.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_MIDDLE_PGSQL_HPP
 #define OSM2PGSQL_MIDDLE_PGSQL_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 /* Implements the mid-layer processing for osm2pgsql
  * using several PostgreSQL tables
  *
diff --git a/src/middle-ram.cpp b/src/middle-ram.cpp
index fda0d8dde..fffcb79d3 100644
--- a/src/middle-ram.cpp
+++ b/src/middle-ram.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 /* Implements the mid-layer processing for osm2pgsql
  * using several arrays in RAM. This is fastest if you
  * have sufficient RAM+Swap.
diff --git a/src/middle-ram.hpp b/src/middle-ram.hpp
index 62dcdbda9..7c3e3914d 100644
--- a/src/middle-ram.hpp
+++ b/src/middle-ram.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_MIDDLE_RAM_HPP
 #define OSM2PGSQL_MIDDLE_RAM_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 /* Implements the mid-layer processing for osm2pgsql
  * using data structures in RAM.
  *
diff --git a/src/middle.cpp b/src/middle.cpp
index ca8bc8bea..bc9f9633d 100644
--- a/src/middle.cpp
+++ b/src/middle.cpp
@@ -1,3 +1,11 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
 
 #include "middle-pgsql.hpp"
 #include "middle-ram.hpp"
diff --git a/src/middle.hpp b/src/middle.hpp
index eddc09604..d16e2296b 100644
--- a/src/middle.hpp
+++ b/src/middle.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_MIDDLE_HPP
 #define OSM2PGSQL_MIDDLE_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <osmium/memory/buffer.hpp>
 
 #include <memory>
diff --git a/src/node-persistent-cache.cpp b/src/node-persistent-cache.cpp
index 5ad00c9f0..0c9a8b98d 100644
--- a/src/node-persistent-cache.cpp
+++ b/src/node-persistent-cache.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #define _LARGEFILE64_SOURCE /* See feature_test_macros(7) */
 
 #include "logging.hpp"
diff --git a/src/node-persistent-cache.hpp b/src/node-persistent-cache.hpp
index 73fdc3fb1..b65d3f791 100644
--- a/src/node-persistent-cache.hpp
+++ b/src/node-persistent-cache.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_NODE_PERSISTENT_CACHE_HPP
 #define OSM2PGSQL_NODE_PERSISTENT_CACHE_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <memory>
 
 #include <osmium/index/map/dense_file_array.hpp>
diff --git a/src/node-ram-cache.cpp b/src/node-ram-cache.cpp
index 5fc30fa08..698f6ede7 100644
--- a/src/node-ram-cache.cpp
+++ b/src/node-ram-cache.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 /* Implements a node cache in ram, for the middle layers to use.
  * It uses two different storage methods, one optimized for dense
  * nodes (with respect to id) and the other for sparse representations.
diff --git a/src/node-ram-cache.hpp b/src/node-ram-cache.hpp
index f0337105b..8e4767895 100644
--- a/src/node-ram-cache.hpp
+++ b/src/node-ram-cache.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_NODE_RAM_CACHE_HPP
 #define OSM2PGSQL_NODE_RAM_CACHE_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 /* Implements the node cache in ram.
  *
  * There are two different storage strategies, either optimised
diff --git a/src/options.cpp b/src/options.cpp
index 096e96720..eb220db27 100644
--- a/src/options.cpp
+++ b/src/options.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "config.h"
 #include "format.hpp"
 #include "logging.hpp"
diff --git a/src/options.hpp b/src/options.hpp
index 1eae721b9..de8d1baca 100644
--- a/src/options.hpp
+++ b/src/options.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_OPTIONS_HPP
 #define OSM2PGSQL_OPTIONS_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "node-ram-cache.hpp"
 #include "reprojection.hpp"
 
diff --git a/src/osm2pgsql.cpp b/src/osm2pgsql.cpp
index 62e9888ee..806c2e280 100644
--- a/src/osm2pgsql.cpp
+++ b/src/osm2pgsql.cpp
@@ -1,27 +1,11 @@
-/*
-#-----------------------------------------------------------------------------
-# osm2pgsql - converts planet.osm file into PostgreSQL
-# compatible output suitable to be rendered by mapnik
-# Use: osm2pgsql planet.osm.bz2
-#-----------------------------------------------------------------------------
-# Original Python implementation by Artem Pavlenko
-# Re-implementation by Jon Burgess, Copyright 2006
-#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License
-# as published by the Free Software Foundation; either version 2
-# of the License, or (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
-#-----------------------------------------------------------------------------
-*/
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
 
 #include "db-check.hpp"
 #include "format.hpp"
diff --git a/src/osmdata.cpp b/src/osmdata.cpp
index 3ecc71c39..1f1830f7d 100644
--- a/src/osmdata.cpp
+++ b/src/osmdata.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <algorithm>
 #include <chrono>
 #include <functional>
diff --git a/src/osmdata.hpp b/src/osmdata.hpp
index 6fb7bc855..ef45c337a 100644
--- a/src/osmdata.hpp
+++ b/src/osmdata.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_OSMDATA_HPP
 #define OSM2PGSQL_OSMDATA_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 /**
  * \file
  *
diff --git a/src/osmium-builder.cpp b/src/osmium-builder.cpp
index 50c944b6b..e431e5489 100644
--- a/src/osmium-builder.cpp
+++ b/src/osmium-builder.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <algorithm>
 #include <cassert>
 #include <tuple>
diff --git a/src/osmium-builder.hpp b/src/osmium-builder.hpp
index 75bfac29f..ddda8ea03 100644
--- a/src/osmium-builder.hpp
+++ b/src/osmium-builder.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_OSMIUM_BUILDER_HPP
 #define OSM2PGSQL_OSMIUM_BUILDER_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <memory>
 #include <string>
 #include <vector>
diff --git a/src/osmtypes.hpp b/src/osmtypes.hpp
index 7ad9b244d..29d907c55 100644
--- a/src/osmtypes.hpp
+++ b/src/osmtypes.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_OSMTYPES_HPP
 #define OSM2PGSQL_OSMTYPES_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 /**
  * \file
  *
diff --git a/src/output-flex.cpp b/src/output-flex.cpp
index 90fbdfbfb..088433d7f 100644
--- a/src/output-flex.cpp
+++ b/src/output-flex.cpp
@@ -1,3 +1,11 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
 
 #include "expire-tiles.hpp"
 #include "geom-transform.hpp"
diff --git a/src/output-flex.hpp b/src/output-flex.hpp
index 2929d7f6a..6598c4c70 100644
--- a/src/output-flex.hpp
+++ b/src/output-flex.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_OUTPUT_FLEX_HPP
 #define OSM2PGSQL_OUTPUT_FLEX_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "db-copy.hpp"
 #include "expire-tiles.hpp"
 #include "flex-table-column.hpp"
diff --git a/src/output-gazetteer.cpp b/src/output-gazetteer.cpp
index a708866a8..ad26b9e39 100644
--- a/src/output-gazetteer.cpp
+++ b/src/output-gazetteer.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "format.hpp"
 #include "middle.hpp"
 #include "options.hpp"
diff --git a/src/output-gazetteer.hpp b/src/output-gazetteer.hpp
index 90cc14c57..92028ca00 100644
--- a/src/output-gazetteer.hpp
+++ b/src/output-gazetteer.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_OUTPUT_GAZETTEER_HPP
 #define OSM2PGSQL_OUTPUT_GAZETTEER_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <memory>
 
 #include <osmium/memory/buffer.hpp>
diff --git a/src/output-multi.cpp b/src/output-multi.cpp
index 653f5ab64..263ba7d30 100644
--- a/src/output-multi.cpp
+++ b/src/output-multi.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "output-multi.hpp"
 #include "expire-tiles.hpp"
 #include "middle.hpp"
diff --git a/src/output-multi.hpp b/src/output-multi.hpp
index c812f43aa..c4a8ee1c5 100644
--- a/src/output-multi.hpp
+++ b/src/output-multi.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_OUTPUT_MULTI_HPP
 #define OSM2PGSQL_OUTPUT_MULTI_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 /* One implementation of output-layer processing for osm2pgsql.
  * Manages a single table, transforming geometry using a
  * variety of algorithms plus tag transformation for the
diff --git a/src/output-null.cpp b/src/output-null.cpp
index 0c30737f1..b9d310ba5 100644
--- a/src/output-null.cpp
+++ b/src/output-null.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "output-null.hpp"
 #include "osmtypes.hpp"
 
diff --git a/src/output-null.hpp b/src/output-null.hpp
index 916e82aa0..f968db734 100644
--- a/src/output-null.hpp
+++ b/src/output-null.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_OUTPUT_NULL_HPP
 #define OSM2PGSQL_OUTPUT_NULL_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 /* Implements dummy output-layer processing for testing.
 */
 
diff --git a/src/output-pgsql.cpp b/src/output-pgsql.cpp
index d5e45c1d0..f01183dc6 100644
--- a/src/output-pgsql.cpp
+++ b/src/output-pgsql.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 /* Implements the mid-layer processing for osm2pgsql
  * using several PostgreSQL tables
  *
diff --git a/src/output-pgsql.hpp b/src/output-pgsql.hpp
index 888ab118d..5f36e2893 100644
--- a/src/output-pgsql.hpp
+++ b/src/output-pgsql.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_OUTPUT_PGSQL_HPP
 #define OSM2PGSQL_OUTPUT_PGSQL_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 /* Implements the output-layer processing for osm2pgsql
  * storing the data in several PostgreSQL tables
  * with the final PostGIS geometries for each entity
diff --git a/src/output.cpp b/src/output.cpp
index ebd5f7325..966240194 100644
--- a/src/output.cpp
+++ b/src/output.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "config.h"
 
 #include "db-copy.hpp"
diff --git a/src/output.hpp b/src/output.hpp
index b0dc082b2..f8dcd7b20 100644
--- a/src/output.hpp
+++ b/src/output.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_OUTPUT_HPP
 #define OSM2PGSQL_OUTPUT_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 /* Common output layer interface */
 
 /* Each output layer must provide methods for
diff --git a/src/pgsql-helper.cpp b/src/pgsql-helper.cpp
index 1bd434cf2..1f4803353 100644
--- a/src/pgsql-helper.cpp
+++ b/src/pgsql-helper.cpp
@@ -1,3 +1,11 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
 
 #include "format.hpp"
 #include "pgsql-helper.hpp"
diff --git a/src/pgsql-helper.hpp b/src/pgsql-helper.hpp
index 78147a0e5..e3c1ba81d 100644
--- a/src/pgsql-helper.hpp
+++ b/src/pgsql-helper.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_PGSQL_HELPER_HPP
 #define OSM2PGSQL_PGSQL_HELPER_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <string>
 
 #include "pgsql.hpp"
diff --git a/src/pgsql.cpp b/src/pgsql.cpp
index 1d234fe5a..e6d8845e5 100644
--- a/src/pgsql.cpp
+++ b/src/pgsql.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 /* Helper functions for the postgresql connections */
 #include "format.hpp"
 #include "logging.hpp"
diff --git a/src/pgsql.hpp b/src/pgsql.hpp
index b0e7e6811..6eae450fb 100644
--- a/src/pgsql.hpp
+++ b/src/pgsql.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_PGSQL_HPP
 #define OSM2PGSQL_PGSQL_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 /**
  * \file
  *
diff --git a/src/processor-line.cpp b/src/processor-line.cpp
index f9334a47e..dd71704fc 100644
--- a/src/processor-line.cpp
+++ b/src/processor-line.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "processor-line.hpp"
 
 processor_line::processor_line(std::shared_ptr<reprojection> const &proj)
diff --git a/src/processor-line.hpp b/src/processor-line.hpp
index 20e6c47ff..08bd03e99 100644
--- a/src/processor-line.hpp
+++ b/src/processor-line.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_PROCESSOR_LINE_HPP
 #define OSM2PGSQL_PROCESSOR_LINE_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "geometry-processor.hpp"
 
 class processor_line : public geometry_processor
diff --git a/src/processor-point.cpp b/src/processor-point.cpp
index 83b64ac87..856ab40e4 100644
--- a/src/processor-point.cpp
+++ b/src/processor-point.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <memory>
 
 #include "processor-point.hpp"
diff --git a/src/processor-point.hpp b/src/processor-point.hpp
index 9debb4d27..414849b45 100644
--- a/src/processor-point.hpp
+++ b/src/processor-point.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_PROCESSOR_POINT_HPP
 #define OSM2PGSQL_PROCESSOR_POINT_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "geometry-processor.hpp"
 
 class processor_point : public geometry_processor
diff --git a/src/processor-polygon.cpp b/src/processor-polygon.cpp
index a6eb5d231..8b9eebe71 100644
--- a/src/processor-polygon.cpp
+++ b/src/processor-polygon.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "processor-polygon.hpp"
 
 processor_polygon::processor_polygon(std::shared_ptr<reprojection> const &proj,
diff --git a/src/processor-polygon.hpp b/src/processor-polygon.hpp
index 02a1b050e..0469ac026 100644
--- a/src/processor-polygon.hpp
+++ b/src/processor-polygon.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_PROCESSOR_POLYGON_HPP
 #define OSM2PGSQL_PROCESSOR_POLYGON_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "geometry-processor.hpp"
 
 class processor_polygon : public geometry_processor
diff --git a/src/progress-display.cpp b/src/progress-display.cpp
index 9923953cd..8b31d0053 100644
--- a/src/progress-display.cpp
+++ b/src/progress-display.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "format.hpp"
 #include "logging.hpp"
 #include "progress-display.hpp"
diff --git a/src/progress-display.hpp b/src/progress-display.hpp
index 7ae98de3b..d8ce5e398 100644
--- a/src/progress-display.hpp
+++ b/src/progress-display.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_PROGRESS_DISPLAY_HPP
 #define OSM2PGSQL_PROGRESS_DISPLAY_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 /**
  * \file
  *
diff --git a/src/reprojection-generic-none.cpp b/src/reprojection-generic-none.cpp
index ddc01b664..062d0cc83 100644
--- a/src/reprojection-generic-none.cpp
+++ b/src/reprojection-generic-none.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <stdexcept>
 
 #include "reprojection.hpp"
diff --git a/src/reprojection-generic-proj4.cpp b/src/reprojection-generic-proj4.cpp
index df8106897..768ddf420 100644
--- a/src/reprojection-generic-proj4.cpp
+++ b/src/reprojection-generic-proj4.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "format.hpp"
 #include "reprojection.hpp"
 
diff --git a/src/reprojection.cpp b/src/reprojection.cpp
index a92f9f59d..e522a58bd 100644
--- a/src/reprojection.cpp
+++ b/src/reprojection.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <osmium/geom/mercator_projection.hpp>
 
 #include "reprojection.hpp"
diff --git a/src/sprompt.hpp b/src/sprompt.hpp
index 22d89d3b4..bcc882ed3 100644
--- a/src/sprompt.hpp
+++ b/src/sprompt.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_SPROMPT_HPP
 #define OSM2PGSQL_SPROMPT_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 char *simple_prompt(const char *prompt, int maxlen, int echo);
 
 #endif // OSM2PGSQL_SPROMPT_HPP
diff --git a/src/table.cpp b/src/table.cpp
index add54b129..0f316caf3 100644
--- a/src/table.cpp
+++ b/src/table.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <algorithm>
 #include <cstdio>
 #include <cstring>
diff --git a/src/table.hpp b/src/table.hpp
index 10cb89f2e..12789082d 100644
--- a/src/table.hpp
+++ b/src/table.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_TABLE_HPP
 #define OSM2PGSQL_TABLE_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "db-copy-mgr.hpp"
 #include "osmtypes.hpp"
 #include "pgsql.hpp"
diff --git a/src/taginfo-impl.hpp b/src/taginfo-impl.hpp
index d9f8624e2..0cf52d129 100644
--- a/src/taginfo-impl.hpp
+++ b/src/taginfo-impl.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_TAGINFO_IMPL_HPP
 #define OSM2PGSQL_TAGINFO_IMPL_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "osmtypes.hpp"
 #include "taginfo.hpp"
 
diff --git a/src/taginfo.cpp b/src/taginfo.cpp
index 36b956e86..e7d710f57 100644
--- a/src/taginfo.cpp
+++ b/src/taginfo.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "format.hpp"
 #include "logging.hpp"
 #include "taginfo-impl.hpp"
diff --git a/src/taginfo.hpp b/src/taginfo.hpp
index 8a77d4e47..f07f9b266 100644
--- a/src/taginfo.hpp
+++ b/src/taginfo.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_TAGINFO_HPP
 #define OSM2PGSQL_TAGINFO_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <string>
 #include <vector>
 
diff --git a/src/tagtransform-c.cpp b/src/tagtransform-c.cpp
index 971a1947e..478e2b701 100644
--- a/src/tagtransform-c.cpp
+++ b/src/tagtransform-c.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <boost/algorithm/string/predicate.hpp>
 #include <cstdlib>
 #include <cstring>
diff --git a/src/tagtransform-c.hpp b/src/tagtransform-c.hpp
index a32f0827b..20048b7a2 100644
--- a/src/tagtransform-c.hpp
+++ b/src/tagtransform-c.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_TAGTRANSFORM_C_HPP
 #define OSM2PGSQL_TAGTRANSFORM_C_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "taginfo-impl.hpp"
 #include "tagtransform.hpp"
 
diff --git a/src/tagtransform-lua.cpp b/src/tagtransform-lua.cpp
index 339b87bee..e9cd16a42 100644
--- a/src/tagtransform-lua.cpp
+++ b/src/tagtransform-lua.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 extern "C"
 {
 #include <lauxlib.h>
diff --git a/src/tagtransform-lua.hpp b/src/tagtransform-lua.hpp
index 8f6723890..af36cfaf2 100644
--- a/src/tagtransform-lua.hpp
+++ b/src/tagtransform-lua.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_TAGTRANSFORM_LUA_HPP
 #define OSM2PGSQL_TAGTRANSFORM_LUA_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <string>
 
 #include "tagtransform.hpp"
diff --git a/src/tagtransform.cpp b/src/tagtransform.cpp
index d9033e721..a49f2b1f6 100644
--- a/src/tagtransform.cpp
+++ b/src/tagtransform.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "tagtransform.hpp"
 #include "config.h"
 #include "logging.hpp"
diff --git a/src/tagtransform.hpp b/src/tagtransform.hpp
index 07096e010..b37c2a076 100644
--- a/src/tagtransform.hpp
+++ b/src/tagtransform.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_TAGTRANSFORM_HPP
 #define OSM2PGSQL_TAGTRANSFORM_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <string>
 
 #include <osmium/memory/buffer.hpp>
diff --git a/src/thread-pool.hpp b/src/thread-pool.hpp
index fcdd1e531..0b123aebf 100644
--- a/src/thread-pool.hpp
+++ b/src/thread-pool.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_THREAD_POOL_HPP
 #define OSM2PGSQL_THREAD_POOL_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 /**
  * \file
  *
diff --git a/src/util.cpp b/src/util.cpp
index f04e0d7fb..dcadcfcad 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -1,3 +1,11 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
 
 #include "util.hpp"
 
diff --git a/src/util.hpp b/src/util.hpp
index a858fd423..0f5e548c5 100644
--- a/src/util.hpp
+++ b/src/util.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_UTIL_HPP
 #define OSM2PGSQL_UTIL_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "format.hpp"
 #include "osmtypes.hpp"
 
diff --git a/src/version.cpp.in b/src/version.cpp.in
index bb59e7963..83334eef0 100644
--- a/src/version.cpp.in
+++ b/src/version.cpp.in
@@ -1,3 +1,11 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
 
 char const *get_osm2pgsql_version() noexcept
 {
diff --git a/src/version.hpp b/src/version.hpp
index 8b5947421..84eeea989 100644
--- a/src/version.hpp
+++ b/src/version.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_VERSION_HPP
 #define OSM2PGSQL_VERSION_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 char const *get_osm2pgsql_version() noexcept;
 char const *get_osm2pgsql_short_version() noexcept;
 char const *get_minimum_postgresql_server_version() noexcept;
diff --git a/src/wildcmp.cpp b/src/wildcmp.cpp
index 39a9339cf..d899c16f6 100644
--- a/src/wildcmp.cpp
+++ b/src/wildcmp.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 /* Wildcard matching.
 
 */
diff --git a/src/wildcmp.hpp b/src/wildcmp.hpp
index b5ff73854..258620373 100644
--- a/src/wildcmp.hpp
+++ b/src/wildcmp.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_WILDCMP_HPP
 #define OSM2PGSQL_WILDCMP_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 bool wildMatch(char const *wildCard, char const *string);
 
 #endif // OSM2PGSQL_WILDCMP_HPP
diff --git a/src/wkb.hpp b/src/wkb.hpp
index 3f40ba7c5..40007f7ba 100644
--- a/src/wkb.hpp
+++ b/src/wkb.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_WKB_HPP
 #define OSM2PGSQL_WKB_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <cassert>
 #include <cmath>
 #include <cstdint>
diff --git a/tests/catch-main.cpp b/tests/catch-main.cpp
index b3143fbb1..1c44ebdc3 100644
--- a/tests/catch-main.cpp
+++ b/tests/catch-main.cpp
@@ -1,2 +1,11 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #define CATCH_CONFIG_MAIN
 #include <catch.hpp>
diff --git a/tests/common-cleanup.hpp b/tests/common-cleanup.hpp
index c17aa7ac9..d291cd145 100644
--- a/tests/common-cleanup.hpp
+++ b/tests/common-cleanup.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_TESTS_COMMON_CLEANUP_HPP
 #define OSM2PGSQL_TESTS_COMMON_CLEANUP_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "format.hpp"
 
 #include <string>
diff --git a/tests/common-import.hpp b/tests/common-import.hpp
index 38745baae..4d96e4586 100644
--- a/tests/common-import.hpp
+++ b/tests/common-import.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_TEST_COMMON_IMPORT_HPP
 #define OSM2PGSQL_TEST_COMMON_IMPORT_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <osmium/handler.hpp>
 #include <osmium/io/any_input.hpp>
 #include <osmium/io/file.hpp>
diff --git a/tests/common-options.hpp b/tests/common-options.hpp
index 1e812e7db..82e8742c7 100644
--- a/tests/common-options.hpp
+++ b/tests/common-options.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_TESTS_COMMON_OPTIONS_HPP
 #define OSM2PGSQL_TESTS_COMMON_OPTIONS_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include "options.hpp"
 
 #include "common-pg.hpp"
diff --git a/tests/common-pg.hpp b/tests/common-pg.hpp
index 8080f3f79..402b2a462 100644
--- a/tests/common-pg.hpp
+++ b/tests/common-pg.hpp
@@ -1,6 +1,15 @@
 #ifndef OSM2PGSQL_TEST_COMMON_PG_HPP
 #define OSM2PGSQL_TEST_COMMON_PG_HPP
 
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <cstdio>
 #include <cstdlib>
 #include <stdexcept>
diff --git a/tests/test-check-input.cpp b/tests/test-check-input.cpp
index 9689e8a08..fa1a059ea 100644
--- a/tests/test-check-input.cpp
+++ b/tests/test-check-input.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "input.hpp"
diff --git a/tests/test-db-copy-mgr.cpp b/tests/test-db-copy-mgr.cpp
index b3e84d960..54c65ce60 100644
--- a/tests/test-db-copy-mgr.cpp
+++ b/tests/test-db-copy-mgr.cpp
@@ -1,9 +1,18 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
+#include <catch.hpp>
+
 #include <string>
 #include <utility>
 #include <vector>
 
-#include <catch.hpp>
-
 #include "common-pg.hpp"
 #include "db-copy-mgr.hpp"
 
diff --git a/tests/test-db-copy-thread.cpp b/tests/test-db-copy-thread.cpp
index 30806bab5..65fd4eb62 100644
--- a/tests/test-db-copy-thread.cpp
+++ b/tests/test-db-copy-thread.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-pg.hpp"
diff --git a/tests/test-domain-matcher.cpp b/tests/test-domain-matcher.cpp
index 2fb32a89a..4e39d13b7 100644
--- a/tests/test-domain-matcher.cpp
+++ b/tests/test-domain-matcher.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "format.hpp"
diff --git a/tests/test-expire-tiles.cpp b/tests/test-expire-tiles.cpp
index 35bff7426..3dc569d36 100644
--- a/tests/test-expire-tiles.cpp
+++ b/tests/test-expire-tiles.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include <set>
diff --git a/tests/test-middle.cpp b/tests/test-middle.cpp
index 9c73721d0..d7e8dc54a 100644
--- a/tests/test-middle.cpp
+++ b/tests/test-middle.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include <algorithm>
diff --git a/tests/test-options-database.cpp b/tests/test-options-database.cpp
index 3205c7e13..71b004742 100644
--- a/tests/test-options-database.cpp
+++ b/tests/test-options-database.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "options.hpp"
diff --git a/tests/test-options-parse.cpp b/tests/test-options-parse.cpp
index c311ce9a4..6fc861b00 100644
--- a/tests/test-options-parse.cpp
+++ b/tests/test-options-parse.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include <vector>
diff --git a/tests/test-options-projection.cpp b/tests/test-options-projection.cpp
index 9100c9394..ea6f87cfa 100644
--- a/tests/test-options-projection.cpp
+++ b/tests/test-options-projection.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include <vector>
diff --git a/tests/test-output-flex-area.cpp b/tests/test-output-flex-area.cpp
index ecd1300b0..c5b299717 100644
--- a/tests/test-output-flex-area.cpp
+++ b/tests/test-output-flex-area.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex-attr.cpp b/tests/test-output-flex-attr.cpp
index 07510ce67..47c178a2c 100644
--- a/tests/test-output-flex-attr.cpp
+++ b/tests/test-output-flex-attr.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex-bbox.cpp b/tests/test-output-flex-bbox.cpp
index 3b4f39a8c..e0413f2c3 100644
--- a/tests/test-output-flex-bbox.cpp
+++ b/tests/test-output-flex-bbox.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex-example-configs.cpp b/tests/test-output-flex-example-configs.cpp
index f70e2a95b..08972fe52 100644
--- a/tests/test-output-flex-example-configs.cpp
+++ b/tests/test-output-flex-example-configs.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex-invalid-geom.cpp b/tests/test-output-flex-invalid-geom.cpp
index 76ee934fb..1952b4bab 100644
--- a/tests/test-output-flex-invalid-geom.cpp
+++ b/tests/test-output-flex-invalid-geom.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex-line.cpp b/tests/test-output-flex-line.cpp
index 1a5411ec6..d7be1ce7a 100644
--- a/tests/test-output-flex-line.cpp
+++ b/tests/test-output-flex-line.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex-lua-fail.cpp b/tests/test-output-flex-lua-fail.cpp
index cc2b1ad0d..922d3be4d 100644
--- a/tests/test-output-flex-lua-fail.cpp
+++ b/tests/test-output-flex-lua-fail.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex-multi-input.cpp b/tests/test-output-flex-multi-input.cpp
index de7146f3e..1b3e94e6c 100644
--- a/tests/test-output-flex-multi-input.cpp
+++ b/tests/test-output-flex-multi-input.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex-multigeom.cpp b/tests/test-output-flex-multigeom.cpp
index cef645e8a..2916203e4 100644
--- a/tests/test-output-flex-multigeom.cpp
+++ b/tests/test-output-flex-multigeom.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex-nodes.cpp b/tests/test-output-flex-nodes.cpp
index 4021f2ff1..498cdbf26 100644
--- a/tests/test-output-flex-nodes.cpp
+++ b/tests/test-output-flex-nodes.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex-nogeom.cpp b/tests/test-output-flex-nogeom.cpp
index 296e7258d..382ca3f19 100644
--- a/tests/test-output-flex-nogeom.cpp
+++ b/tests/test-output-flex-nogeom.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex-relation-changes.cpp b/tests/test-output-flex-relation-changes.cpp
index 58802157a..51b586dcf 100644
--- a/tests/test-output-flex-relation-changes.cpp
+++ b/tests/test-output-flex-relation-changes.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex-relation-combinations.cpp b/tests/test-output-flex-relation-combinations.cpp
index a416ecca1..c2a90fe4b 100644
--- a/tests/test-output-flex-relation-combinations.cpp
+++ b/tests/test-output-flex-relation-combinations.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex-relations.cpp b/tests/test-output-flex-relations.cpp
index 95d405546..4148996b5 100644
--- a/tests/test-output-flex-relations.cpp
+++ b/tests/test-output-flex-relations.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex-schema.cpp b/tests/test-output-flex-schema.cpp
index 247e2162b..35b66de15 100644
--- a/tests/test-output-flex-schema.cpp
+++ b/tests/test-output-flex-schema.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex-stage2.cpp b/tests/test-output-flex-stage2.cpp
index 888feb537..97e443176 100644
--- a/tests/test-output-flex-stage2.cpp
+++ b/tests/test-output-flex-stage2.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex-tablespace.cpp b/tests/test-output-flex-tablespace.cpp
index 7b7aee432..426b7f576 100644
--- a/tests/test-output-flex-tablespace.cpp
+++ b/tests/test-output-flex-tablespace.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex-types.cpp b/tests/test-output-flex-types.cpp
index 6f9076ac7..417f2e01a 100644
--- a/tests/test-output-flex-types.cpp
+++ b/tests/test-output-flex-types.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex-uni.cpp b/tests/test-output-flex-uni.cpp
index 7fa8f58d6..1fa9592a9 100644
--- a/tests/test-output-flex-uni.cpp
+++ b/tests/test-output-flex-uni.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex-update.cpp b/tests/test-output-flex-update.cpp
index 7f68acc87..dba363d27 100644
--- a/tests/test-output-flex-update.cpp
+++ b/tests/test-output-flex-update.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex-validgeom.cpp b/tests/test-output-flex-validgeom.cpp
index fdeb5f6ee..f6cf05b30 100644
--- a/tests/test-output-flex-validgeom.cpp
+++ b/tests/test-output-flex-validgeom.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex-way-add.cpp b/tests/test-output-flex-way-add.cpp
index af815a72d..38ef840c0 100644
--- a/tests/test-output-flex-way-add.cpp
+++ b/tests/test-output-flex-way-add.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex-way-change.cpp b/tests/test-output-flex-way-change.cpp
index d7b52dd80..29fc4be61 100644
--- a/tests/test-output-flex-way-change.cpp
+++ b/tests/test-output-flex-way-change.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex-way-del.cpp b/tests/test-output-flex-way-del.cpp
index d384baff5..58a6f0a09 100644
--- a/tests/test-output-flex-way-del.cpp
+++ b/tests/test-output-flex-way-del.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex-way-relation-add.cpp b/tests/test-output-flex-way-relation-add.cpp
index d9db69e72..273cffb97 100644
--- a/tests/test-output-flex-way-relation-add.cpp
+++ b/tests/test-output-flex-way-relation-add.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex-way-relation-del.cpp b/tests/test-output-flex-way-relation-del.cpp
index 51f6010a0..b226c22a8 100644
--- a/tests/test-output-flex-way-relation-del.cpp
+++ b/tests/test-output-flex-way-relation-del.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-flex.cpp b/tests/test-output-flex.cpp
index 8452a6512..a04e9a9b2 100644
--- a/tests/test-output-flex.cpp
+++ b/tests/test-output-flex.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-gazetteer.cpp b/tests/test-output-gazetteer.cpp
index 20ae69d7a..3435bd9a8 100644
--- a/tests/test-output-gazetteer.cpp
+++ b/tests/test-output-gazetteer.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include <random>
diff --git a/tests/test-output-multi-line-storage.cpp b/tests/test-output-multi-line-storage.cpp
index 9e338aa69..cd7c34aad 100644
--- a/tests/test-output-multi-line-storage.cpp
+++ b/tests/test-output-multi-line-storage.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-multi-line.cpp b/tests/test-output-multi-line.cpp
index ad23594f7..e7a119cd5 100644
--- a/tests/test-output-multi-line.cpp
+++ b/tests/test-output-multi-line.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "geometry-processor.hpp"
diff --git a/tests/test-output-multi-point-multi-table.cpp b/tests/test-output-multi-point-multi-table.cpp
index 42039c033..d9ee8b2a2 100644
--- a/tests/test-output-multi-point-multi-table.cpp
+++ b/tests/test-output-multi-point-multi-table.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "geometry-processor.hpp"
diff --git a/tests/test-output-multi-point.cpp b/tests/test-output-multi-point.cpp
index 103c45a95..f208d58f2 100644
--- a/tests/test-output-multi-point.cpp
+++ b/tests/test-output-multi-point.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "geometry-processor.hpp"
diff --git a/tests/test-output-multi-poly-trivial.cpp b/tests/test-output-multi-poly-trivial.cpp
index 66af1190a..b8915c5c9 100644
--- a/tests/test-output-multi-poly-trivial.cpp
+++ b/tests/test-output-multi-poly-trivial.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-multi-polygon.cpp b/tests/test-output-multi-polygon.cpp
index 467105b5a..4aab173c7 100644
--- a/tests/test-output-multi-polygon.cpp
+++ b/tests/test-output-multi-polygon.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "geometry-processor.hpp"
diff --git a/tests/test-output-multi-tags.cpp b/tests/test-output-multi-tags.cpp
index 343c65907..4e87ef9e7 100644
--- a/tests/test-output-multi-tags.cpp
+++ b/tests/test-output-multi-tags.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-pgsql-area.cpp b/tests/test-output-pgsql-area.cpp
index b0fd5e832..96f4b2502 100644
--- a/tests/test-output-pgsql-area.cpp
+++ b/tests/test-output-pgsql-area.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-pgsql-hstore-match-only.cpp b/tests/test-output-pgsql-hstore-match-only.cpp
index 3db7192e2..63a0c9560 100644
--- a/tests/test-output-pgsql-hstore-match-only.cpp
+++ b/tests/test-output-pgsql-hstore-match-only.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-pgsql-int4.cpp b/tests/test-output-pgsql-int4.cpp
index bb2ca38c6..6476ffb73 100644
--- a/tests/test-output-pgsql-int4.cpp
+++ b/tests/test-output-pgsql-int4.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-pgsql-schema.cpp b/tests/test-output-pgsql-schema.cpp
index fc310364c..b1a4b9a11 100644
--- a/tests/test-output-pgsql-schema.cpp
+++ b/tests/test-output-pgsql-schema.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-pgsql-tablespace.cpp b/tests/test-output-pgsql-tablespace.cpp
index 4eb2b44da..e183138c8 100644
--- a/tests/test-output-pgsql-tablespace.cpp
+++ b/tests/test-output-pgsql-tablespace.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-pgsql-validgeom.cpp b/tests/test-output-pgsql-validgeom.cpp
index 59baa1629..0b5628db7 100644
--- a/tests/test-output-pgsql-validgeom.cpp
+++ b/tests/test-output-pgsql-validgeom.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-pgsql-z_order.cpp b/tests/test-output-pgsql-z_order.cpp
index e6978a32c..b790d848b 100644
--- a/tests/test-output-pgsql-z_order.cpp
+++ b/tests/test-output-pgsql-z_order.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-output-pgsql.cpp b/tests/test-output-pgsql.cpp
index 2fc712d3f..ab188817c 100644
--- a/tests/test-output-pgsql.cpp
+++ b/tests/test-output-pgsql.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-parse-osmium.cpp b/tests/test-parse-osmium.cpp
index 71365dd1f..8ec47bf58 100644
--- a/tests/test-parse-osmium.cpp
+++ b/tests/test-parse-osmium.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "middle.hpp"
diff --git a/tests/test-persistent-cache.cpp b/tests/test-persistent-cache.cpp
index b397bdc78..f40c294c5 100644
--- a/tests/test-persistent-cache.cpp
+++ b/tests/test-persistent-cache.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "node-persistent-cache.hpp"
diff --git a/tests/test-pgsql.cpp b/tests/test-pgsql.cpp
index 0ada0d323..1abc00bc2 100644
--- a/tests/test-pgsql.cpp
+++ b/tests/test-pgsql.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "common-import.hpp"
diff --git a/tests/test-ram-cache.cpp b/tests/test-ram-cache.cpp
index fae245bf5..e9faf735f 100644
--- a/tests/test-ram-cache.cpp
+++ b/tests/test-ram-cache.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include <vector>
diff --git a/tests/test-reprojection.cpp b/tests/test-reprojection.cpp
index 76cffe0cc..579b9a493 100644
--- a/tests/test-reprojection.cpp
+++ b/tests/test-reprojection.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "reprojection.hpp"
diff --git a/tests/test-taginfo.cpp b/tests/test-taginfo.cpp
index 87538d6bc..b4bec2b42 100644
--- a/tests/test-taginfo.cpp
+++ b/tests/test-taginfo.cpp
@@ -1,3 +1,11 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
 
 #include <catch.hpp>
 
diff --git a/tests/test-util.cpp b/tests/test-util.cpp
index b00d343c6..711fce081 100644
--- a/tests/test-util.cpp
+++ b/tests/test-util.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "util.hpp"
diff --git a/tests/test-wildcard-match.cpp b/tests/test-wildcard-match.cpp
index 13f3cbf22..2f243a06c 100644
--- a/tests/test-wildcard-match.cpp
+++ b/tests/test-wildcard-match.cpp
@@ -1,3 +1,12 @@
+/**
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This file is part of osm2pgsql (https://osm2pgsql.org/).
+ *
+ * Copyright (C) 2006-2020 by the osm2pgsql developer community.
+ * For a full list of authors see the git log.
+ */
+
 #include <catch.hpp>
 
 #include "wildcmp.hpp"