use gh-describe

.github/workflows/firmware.yml

@@ -1,9 +1,6 @@
 name: Firmware
 on: [push, pull_request, merge_group]
 
-env:
-  BRANCH_NAME: ${{ github.head_ref || github.ref_name }}
-
 jobs:
   firmware-build:
     runs-on: ubuntu-latest
@@ -18,20 +15,28 @@ jobs:
     - name: Install ARM GCC
       uses: carlosperate/arm-none-eabi-gcc-action@v1
 
+    - name: Git describe
+      id: ghd
+      uses: proudust/gh-describe@v2
+
+    - name: Check outputs
+      run: |
+        echo "describe  : ${{ steps.ghd.outputs.describe }}"
+        echo "tag       : ${{ steps.ghd.outputs.tag }}"
+        echo "distance  : ${{ steps.ghd.outputs.distance }}"
+        echo "sha       : ${{ steps.ghd.outputs.sha }}"
+        echo "short-sha : ${{ steps.ghd.outputs.short-sha }}"
+        git describe --abbrev=7 --dirty --always --tags
+
     - name: Checkout source code
       uses: actions/checkout@v4
       with:
         submodules: true
 
     - name: Build Apollo firmware for ${{ matrix.target-board }}
       run: |
-        # fetch to enable `git describe` used for firmware version string
-        TAG=$(git ls-remote origin "refs/tags/*[0-9]" | cut -f 2- | sort -V | tail -1)
-        [ -n "$TAG" ] && git fetch --filter=tree:0 --shallow-exclude $TAG origin $BRANCH_NAME
-        [ -n "$TAG" ] && git fetch --filter=tree:0 --deepen=1 origin $BRANCH_NAME
-        [ -n "$TAG" ] && git fetch --filter=tree:0 --depth=1 origin $TAG:$TAG
         cd firmware
-        APOLLO_BOARD=${{ matrix.target-board }} make get-deps all
+        APOLLO_BOARD=${{ matrix.target-board }} VERSION_STRING=${{ describe }} make get-deps all
 
     # Publish bootloader binary for latest Cynthion hardware revision
     - name: Publish Artifacts