Use SPDX-License-Identifier consistently

This replaces all of the Apache blurbs at the start of each file with an
`# SPDX-License-Identifier: Apache-2.0` string. It also fixes existing
uses to be consistent in capitalization, and to be placed above any
copyright notices.

This removes nearly 3000 lines of boilerplate from the project (only
python files), which no developer cares to look at.

SPDX is in common use, particularly in the Linux kernel, and is the
recommended format for Meson's own `project(license: )` field

9 files changed, 9 insertions, 92 deletions

diff --git a/mesonbuild/interpreterbase/__init__.py b/mesonbuild/interpreterbase/__init__.py
index 8a2e0788f..934375a0e 100644
--- a/mesonbuild/interpreterbase/__init__.py
+++ b/mesonbuild/interpreterbase/__init__.py
@@ -1,17 +1,6 @@
+# SPDX-License-Identifier: Apache-2.0
 # Copyright 2013-2021 The Meson development team
 
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-
-#     http://www.apache.org/licenses/LICENSE-2.0
-
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
 __all__ = [
     'InterpreterObject',
     'MesonInterpreterObject',
diff --git a/mesonbuild/interpreterbase/_unholder.py b/mesonbuild/interpreterbase/_unholder.py
index 4f1edc102..c62aafe8e 100644
--- a/mesonbuild/interpreterbase/_unholder.py
+++ b/mesonbuild/interpreterbase/_unholder.py
@@ -1,16 +1,6 @@
+# SPDX-License-Identifier: Apache-2.0
 # Copyright 2013-2021 The Meson development team
 
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-
-#     http://www.apache.org/licenses/LICENSE-2.0
-
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
 from __future__ import annotations
 
 import typing as T
diff --git a/mesonbuild/interpreterbase/baseobjects.py b/mesonbuild/interpreterbase/baseobjects.py
index 38b181e27..9a119a98a 100644
--- a/mesonbuild/interpreterbase/baseobjects.py
+++ b/mesonbuild/interpreterbase/baseobjects.py
@@ -1,16 +1,6 @@
+# SPDX-License-Identifier: Apache-2.0
 # Copyright 2013-2021 The Meson development team
 
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-
-#     http://www.apache.org/licenses/LICENSE-2.0
-
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
 from __future__ import annotations
 
 from .. import mparser
diff --git a/mesonbuild/interpreterbase/decorators.py b/mesonbuild/interpreterbase/decorators.py
index 17c6c8c8f..6524aa92d 100644
--- a/mesonbuild/interpreterbase/decorators.py
+++ b/mesonbuild/interpreterbase/decorators.py
@@ -1,16 +1,6 @@
+# SPDX-License-Identifier: Apache-2.0
 # Copyright 2013-2021 The Meson development team
 
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-
-#     http://www.apache.org/licenses/LICENSE-2.0
-
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
 from __future__ import annotations
 
 from .. import mesonlib, mlog
diff --git a/mesonbuild/interpreterbase/disabler.py b/mesonbuild/interpreterbase/disabler.py
index 182bb625c..bad0d7129 100644
--- a/mesonbuild/interpreterbase/disabler.py
+++ b/mesonbuild/interpreterbase/disabler.py
@@ -1,16 +1,6 @@
+# SPDX-License-Identifier: Apache-2.0
 # Copyright 2013-2021 The Meson development team
 
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-
-#     http://www.apache.org/licenses/LICENSE-2.0
-
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
 from __future__ import annotations
 
 import typing as T
diff --git a/mesonbuild/interpreterbase/exceptions.py b/mesonbuild/interpreterbase/exceptions.py
index cdbe0fb3b..495531e0f 100644
--- a/mesonbuild/interpreterbase/exceptions.py
+++ b/mesonbuild/interpreterbase/exceptions.py
@@ -1,17 +1,6 @@
+# SPDX-License-Identifier: Apache-2.0
 # Copyright 2013-2021 The Meson development team
 
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-
-#     http://www.apache.org/licenses/LICENSE-2.0
-
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
 from ..mesonlib import MesonException
 
 class InterpreterException(MesonException):
diff --git a/mesonbuild/interpreterbase/helpers.py b/mesonbuild/interpreterbase/helpers.py
index 917969b26..0ded85b0e 100644
--- a/mesonbuild/interpreterbase/helpers.py
+++ b/mesonbuild/interpreterbase/helpers.py
@@ -1,16 +1,6 @@
+# SPDX-License-Identifier: Apache-2.0
 # Copyright 2013-2021 The Meson development team
 
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-
-#     http://www.apache.org/licenses/LICENSE-2.0
-
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
 from __future__ import annotations
 
 from .. import mesonlib, mparser
diff --git a/mesonbuild/interpreterbase/interpreterbase.py b/mesonbuild/interpreterbase/interpreterbase.py
index 315bdf403..365e2fd4b 100644
--- a/mesonbuild/interpreterbase/interpreterbase.py
+++ b/mesonbuild/interpreterbase/interpreterbase.py
@@ -1,17 +1,6 @@
+# SPDX-License-Identifier: Apache-2.0
 # Copyright 2016-2017 The Meson development team
 
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-
-#     http://www.apache.org/licenses/LICENSE-2.0
-
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
 # This class contains the basic functionality needed to run any interpreter
 # or an interpreter-based tool.
 from __future__ import annotations
diff --git a/mesonbuild/interpreterbase/operator.py b/mesonbuild/interpreterbase/operator.py
index 5dec8d0a8..3419c4bec 100644
--- a/mesonbuild/interpreterbase/operator.py
+++ b/mesonbuild/interpreterbase/operator.py
@@ -1,4 +1,4 @@
-# SPDX-license-identifier: Apache-2.0
+# SPDX-License-Identifier: Apache-2.0
 
 from enum import Enum