make project compatible with REUSE specification

Shell scripts, toml and nix files have license headers added.
Test suites, GitHub actions, Markdown and lock files are annotated in REUSE.toml as there's little
value in adding headers to each file.

A new LICENSES directory is added so the `reuse` tool is happy.

Signed-off-by: Gary Guo <gary@garyguo.net>

Author: nbdd0121

.gitignore

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0 OR MIT
+
 target/
 *.swp
 *.orig

.mailmap

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0 OR MIT
+
 Benno Lossin <lossin@kernel.org> <y86-dev@protonmail.com>
 Benno Lossin <lossin@kernel.org> <94611769+y86-dev@users.noreply.github.com>
 Benno Lossin <lossin@kernel.org> <benno.lossin@proton.me>

Cargo.toml

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0 OR MIT
+
 [package]
 name = "pin-init"
 version = "0.0.10"

LICENSES/Apache-2.0.txt

@@ -0,0 +1 @@
+../LICENSE-MIT

LICENSES/MIT.txt

@@ -0,0 +1 @@
+../LICENSE-MIT

REUSE.toml

@@ -0,0 +1,18 @@
+# SPDX-License-Identifier: Apache-2.0 OR MIT
+
+version = 1
+
+[[annotations]]
+path = "**"
+SPDX-FileCopyrightText = "Rust for Linux Contributors"
+
+[[annotations]]
+path = [
+    "tests/**",
+    ".github/**",
+    "**.md",
+    "flake.lock",
+    "**/Cargo.lock",
+]
+SPDX-License-Identifier = "Apache-2.0 OR MIT"
+SPDX-FileCopyrightText = "Rust for Linux Contributors"

build.rs

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
 use rustc_version::{version_meta, Channel, Version};
 
 fn main() {

flake.nix

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: Apache-2.0 OR MIT
 {
   nixConfig = {
     extra-substituters = [

from-kernel.sh

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+# SPDX-License-Identifier: Apache-2.0 OR MIT
 
 set -e
 

internal/Cargo.toml

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0 OR MIT
+
 [package]
 name = "pin-init-internal"
 version = "0.0.6"