fix action 3

.forgejo/workflows/auto-update.yaml

@@ -29,10 +29,19 @@ jobs:
       - name: Check for changes
         id: changes
         run: |
+          echo "DEBUG: GITHUB_OUTPUT='${GITHUB_OUTPUT:-<unset>}'"
+          echo "DEBUG: Checking if GITHUB_OUTPUT var is set: $(if [ -z "${GITHUB_OUTPUT+x}" ]; then echo "NOT SET"; else echo "SET (value: '$GITHUB_OUTPUT')"; fi)"
+          
+          set_output() {
+            echo "::set-output name=$1::$2"
+            if [ -n "${GITHUB_OUTPUT:-}" ]; then
+              echo "$1=$2" >> "$GITHUB_OUTPUT"
+            fi
+          }
           if git diff --quiet flake.lock; then
-            echo "changed=false" >> $GITHUB_OUTPUT
+            set_output changed false
           else
-            echo "changed=true" >> $GITHUB_OUTPUT
+            set_output changed true
           fi
 
       - name: Extract LXC hosts
@@ -40,6 +49,14 @@ jobs:
         if: steps.changes.outputs.changed == 'true'
         run: |
           set -euo pipefail
+          
+          set_output() {
+            echo "::set-output name=$1::$2"
+            if [ -n "${GITHUB_OUTPUT:-}" ]; then
+              echo "$1=$2" >> "$GITHUB_OUTPUT"
+            fi
+          }
+          
           HOSTS=$(nix eval --json .#colmena --apply 'x: builtins.filter (n: n != "meta" && builtins.elem "lxc" (x.${n}.deployment.tags or [])) (builtins.attrNames x)' 2>&1) || {
             echo "Failed to evaluate colmena hosts"
             exit 1
@@ -47,16 +64,20 @@ jobs:
           # Validate the output is a non-empty JSON array
           if ! echo "$HOSTS" | jq -e '. | if type == "array" and length > 0 then true else false end' > /dev/null 2>&1; then
             echo "Error: No LXC hosts found or invalid JSON output: $HOSTS"
-            echo "hosts=[]" >> $GITHUB_OUTPUT
+            set_output hosts "[]"
             exit 0
           fi
-          echo "hosts=$HOSTS" >> $GITHUB_OUTPUT
+          
+          set_output hosts "$HOSTS"
           echo "Discovered hosts: $HOSTS"
           # Also write to file as backup (in case job outputs don't work)
           echo "$HOSTS" > hosts.json
-          # Verify output was set
-          echo "DEBUG: GITHUB_OUTPUT contents:"
-          cat $GITHUB_OUTPUT
+          # Debug output
+          echo "DEBUG: GITHUB_OUTPUT exists: ${GITHUB_OUTPUT:-NOT SET}"
+          if [ -n "${GITHUB_OUTPUT:-}" ] && [ -f "$GITHUB_OUTPUT" ]; then
+            echo "DEBUG: GITHUB_OUTPUT contents:"
+            cat "$GITHUB_OUTPUT"
+          fi
 
       - name: Debug job outputs
         if: steps.changes.outputs.changed == 'true'