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CI: Detached signatures for firmware binaries #8300

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20 changes: 20 additions & 0 deletions .github/workflows/build_firmware.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -45,6 +45,13 @@ jobs:
echo "tgt=release/bleota.bin" >> $GITHUB_OUTPUT
fi

- name: Import GPG key
if: github.repository == 'meshtastic/firmware'
uses: crazy-max/ghaction-import-gpg@v6
with:
gpg_private_key: ${{ secrets.PPA_GPG_PRIVATE_KEY }}
id: gpg

- name: Build ${{ inputs.platform }}
id: build
uses: meshtastic/gh-action-firmware@main
Expand All @@ -55,6 +62,18 @@ jobs:
ota_firmware_source: ${{ steps.ota_dir.outputs.src || '' }}
ota_firmware_target: ${{ steps.ota_dir.outputs.tgt || '' }}

- name: Sign firmware
working-directory: release
if: github.repository == 'meshtastic/firmware'
env:
GPG_KEY_ID: ${{ steps.gpg.outputs.keyid }}
run: |
for f in *.bin *.elf *.uf2 *.hex *.zip; do
if [ -f "$f" ]; then
gpg --batch --default-key "$GPG_KEY_ID" --output "$f.sig" --detach-sign "$f"
fi
done

- name: Store binaries as an artifact
uses: actions/upload-artifact@v4
id: upload
Expand All @@ -67,3 +86,4 @@ jobs:
release/*.uf2
release/*.hex
release/*-ota.zip
release/*.sig
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