ci: add license header check

Signed-off-by: Richard Zak <[email protected]>

Author: rjzak

.github/workflows/lint.yml

@@ -21,6 +21,14 @@ jobs:
       - name: cargo clippy
         run: cargo clippy --workspace --all-features --tests -- -D warnings
 
+  check-spdx-headers:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - uses: enarx/spdx@master
+        with:
+          licenses: Apache-2.0
+
   readme:
     name: cargo readme
     runs-on: ubuntu-latest

ciborium-io/src/eio.rs

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 use crate::{Read, Write};
 
 /// Wrapper around W: embedded_io::Write implementing ciborium::Write

ciborium-ll/src/dec.rs

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 use super::*;
 
 use ciborium_io::Read;

ciborium-ll/src/enc.rs

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 use super::*;
 
 use ciborium_io::Write;

ciborium-ll/src/hdr.rs

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 use super::*;
 
 #[cfg(feature = "half")]

ciborium-ll/src/seg.rs

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 use super::*;
 
 use ciborium_io::Read;

ciborium/src/tag.rs

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 //! Contains helper types for dealing with CBOR tags.
 
 use serde::{de, de::Error as _, forward_to_deserialize_any, ser, Deserialize, Serialize};

ciborium/src/value/integer.rs

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: Apache-2.0
+
 use core::cmp::Ordering;
 
 macro_rules! implfrom {