[nanokit] Set up GHA for releases

.github/workflows/build.yml

@@ -2,6 +2,8 @@ on:
   push:
   pull_request:
   workflow_dispatch:
+  release:
+    types: [published]
 
 jobs:
   build:
@@ -45,10 +47,36 @@ jobs:
       run:  |
         python tools/progen_compile.py -t cmake_gcc_arm -g ninja csk6_nanokit_bl csk6_nanokit_if
         cp -v projectfiles/cmake_gcc_arm/*/build/*_crc.hex .
+        python tools/mergehex.py -o csk6_nanokit_factory_all.hex csk6_nanokit_bl_crc.hex csk6_nanokit_if_crc.hex
 
     - name: Upload artifacts
       uses: actions/upload-artifact@v4
       with:
         name: firmware_${{ github.run_id }}
         path: |
           *.hex
+
+  publish:
+    needs: build
+    if: github.event_name == 'release'
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Download distributables
+      uses: actions/download-artifact@v4
+      with:
+        pattern: firmware_*
+        path: firmware/
+
+    - name: Rename binaries
+      run: |
+        for f in firmware/*.hex; do
+          mv $f ${f%.hex}_${{ github.event.release.tag_name }}.hex
+        done
+
+    - name: Upload assets to release
+      uses: csexton/release-asset-action@v3
+      with:
+        pattern: firmware/*
+        github-token: ${{ secrets.GITHUB_TOKEN }}

tools/mergehex.py

@@ -0,0 +1,56 @@
+#!/usr/bin/env python3
+#
+# Copyright (c) 2018 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: Apache-2.0
+
+# This merges a set of input hex files into a single output hex file.
+# Any conflicts will result in an error being reported.
+
+from intelhex import IntelHex
+from intelhex import AddressOverlapError
+
+import argparse
+
+
+def merge_hex_files(output, input_hex_files, overlap):
+    ih = IntelHex()
+
+    for hex_file_path in input_hex_files:
+        to_merge = IntelHex(hex_file_path)
+
+        # Since 'arm-none-eabi-objcopy' incorrectly inserts record
+        # type '03 - Start Segment Address', we need to remove the
+        # start_addr to avoid conflicts when merging.
+        to_merge.start_addr = None
+
+        try:
+            ih.merge(to_merge, overlap=overlap)
+        except AddressOverlapError:
+            raise AddressOverlapError("{} has merge issues".format(hex_file_path))
+
+    ih.write_hex_file(output)
+
+
+def parse_args():
+    parser = argparse.ArgumentParser(
+        description="Merge hex files.",
+        formatter_class=argparse.RawDescriptionHelpFormatter, allow_abbrev=False)
+    parser.add_argument("-o", "--output", required=False, default="merged.hex",
+                        type=argparse.FileType('w', encoding='UTF-8'),
+                        help="Output file name.")
+    parser.add_argument("--overlap", default="error",
+                        help="What to do when files overlap (error, ignore, replace). "
+                             "See IntelHex.merge() for more info.")
+    parser.add_argument("input_files", nargs='*')
+    return parser.parse_args()
+
+
+def main():
+    args = parse_args()
+
+    merge_hex_files(args.output, args.input_files, args.overlap)
+
+
+if __name__ == "__main__":
+    main()