Check for empty build branch (#3)

.github/workflows/generate.yml

@@ -40,6 +40,9 @@ jobs:
           # Make a list of valid pairs from our config
           echo 'JSON_CONTENT<<EOF' >> $GITHUB_OUTPUT
           for BRANCH in legacy current midstream edge; do
+              if [ -z "${FILES}" ]; then
+                continue
+              fi
               FILES=$(cat os/targets/*.conf | grep $BRANCH | grep -v "^$" | grep -v "^#" | sed -n $LINE'p' | cut -d " " -f1 | uniq)
               while IFS= read -r line; do
               BOARDFAMILY=$(cat build/config/boards/$line.* | grep BOARDFAMILY | cut -d'"' -f2)
@@ -53,7 +56,7 @@ jobs:
               RUNNER=ubuntu-latest
               [[ "${ARCH}" == arm64 ]] && RUNNER=aarch64
               [[ "${BRANCH}" == current ]] && RUNNER=alfa
-              [[ "${BRANCH}" == edge ]] && RUNNER=beta              
+              [[ "${BRANCH}" == edge ]] && RUNNER=beta
               echo "${LINUXFAMILY}:${BOARDFAMILY}:${BRANCH}:${line}:${RUNNER}"
               done <<< "$FILES"
           done | sort | uniq | sort -u -t: -k1,3 | cut -d":" -f3,4,5 | sort | uniq | sed "s/:/ /g" | awk '{ printf "%s%s%s\n", "{\"board\":\""$2"\",", "\"branch\":\""$1"\",", "\"runner\":\""$3"\"}" }' | jq -s >> $GITHUB_OUTPUT
@@ -65,9 +68,9 @@ jobs:
       fail-fast: false # let other jobs try to complete if one fails
       matrix:
         include: ${{ fromJSON(needs.prepare.outputs.matrix) }}
-        
+
     runs-on: "${{ matrix.runner }}"
-    
+
     name: "${{ matrix.board }} ${{ matrix.branch }} ${{ matrix.runner }}"
     env:
       BRANCH: "${{ matrix.branch }}"
@@ -100,7 +103,7 @@ jobs:
           bash ./compile.sh kernel "BRANCH=${{env.BRANCH}}" "BOARD=${{env.BOARD}}" SHARE_LOG=yes CLEAN_LEVEL="alldebs" FORCE_ARTIFACTS_DOWNLOAD="yes"
           ls -l output/debs/
           du output
-          
+
       - name: "Generate key id" # We need this in case we run multiple runners on one machine
         run: echo "RANDOM=ID_$((RANDOM%1000000))" >> $GITHUB_ENV
         shell: bash
@@ -120,4 +123,3 @@ jobs:
              sudo apt-get -y -qq install lftp
           fi
           lftp -u upload, -e "set sftp:connect-program ssh -ax -i $HOME/.ssh/${{ env.RANDOM }}; set net:timeout 4;set net:max-retries 6;mirror -R --include-glob *.deb --no-empty-dirs --parallel=8 --no-perms output/debs/. debs-beta/ ;bye" sftp://users.armbian.com
-