Forgejo does not support dynamic matrix. d'ho

.forgejo/workflows/auto-update.yaml

@@ -11,7 +11,6 @@ jobs:
     runs-on: nix
     outputs:
       changed: ${{ steps.changes.outputs.changed }}
-      hosts: ${{ steps.hosts.outputs.hosts }}
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -20,7 +19,7 @@ jobs:
 
       - name: Configure Git
         run: |
-          git config user.name "Flake Update Bot" 
+          git config user.name "Flake Update Bot"
           git config user.email "bot@noreply.local"
 
       - name: Update flake inputs
@@ -36,11 +35,18 @@ jobs:
           fi
 
       - name: Extract LXC hosts
-        id: hosts
         if: steps.changes.outputs.changed == 'true'
         run: |
+          set -euo pipefail
           HOSTS=$(nix eval --json .#colmena --apply 'x: builtins.filter (n: n != "meta" && builtins.elem "lxc" (x.${n}.deployment.tags or [])) (builtins.attrNames x)')
-          echo "hosts=$HOSTS" >> $FORGEJO_OUTPUT
+          
+          # Validate the output is a non-empty JSON array
+          if ! echo "$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: $HOSTS"
+            exit 1
+          fi
+          
+          echo "$HOSTS" > hosts.json
           echo "Discovered hosts: $HOSTS"
 
       - name: Upload flake.lock
@@ -51,19 +57,19 @@ jobs:
           path: flake.lock
           retention-days: 1
 
+      - name: Upload hosts list
+        if: steps.changes.outputs.changed == 'true'
+        uses: forgejo/upload-artifact@v4
+        with:
+          name: hosts-list
+          path: hosts.json
+          retention-days: 1
+
   build:
     needs: check-updates
     if: needs.check-updates.outputs.changed == 'true'
     runs-on: nix
-    strategy:
-      fail-fast: false
-      matrix:
-        host: ${{ needs.check-updates.outputs.hosts }}
     steps:
-      - name: Debug HOSTS
-        run: |
-          echo "HOSTS: "${{ needs.check-updates.outputs.hosts }}
-
       - name: Checkout repository
         uses: actions/checkout@v4
 
@@ -72,25 +78,81 @@ jobs:
         with:
           name: flake-lock
 
-      - name: Build ${{ matrix.host }}
+      - name: Download hosts list
+        uses: forgejo/download-artifact@v4
+        with:
+          name: hosts-list
+
+      - name: Build all hosts
         id: build
         run: |
-          echo "Building host: ${{ matrix.host }}"
-          nix build .#nixosConfigurations.${{ matrix.host }}.config.system.build.toplevel --no-link 2>&1 | tee build-output.txt
+          set -euo pipefail
+          
+          if [ ! -f hosts.json ]; then
+            echo "Error: hosts.json not found"
+            exit 1
+          fi
+          
+          HOSTS=$(cat hosts.json)
+          echo "Building hosts: $HOSTS"
+          
+          FAILED_HOSTS=""
+          SUCCESS_HOSTS=""
+          
+          for HOST in $(echo "$HOSTS" | jq -r '.[]'); do
+            echo ""
+            echo "=========================================="
+            echo "Building: $HOST"
+            echo "=========================================="
+            
+            if nix build ".#nixosConfigurations.${HOST}.config.system.build.toplevel" --no-link --quiet 2>&1 | tee "build-${HOST}.txt"; then
+              echo "✓ Build succeeded: $HOST"
+              SUCCESS_HOSTS="$SUCCESS_HOSTS $HOST"
+            else
+              echo "✗ Build failed: $HOST"
+              FAILED_HOSTS="$FAILED_HOSTS $HOST"
+            fi
+          done
+          
+          echo ""
+          echo "=========================================="
+          echo "Build Summary"
+          echo "=========================================="
+          echo "Succeeded:$SUCCESS_HOSTS"
+          echo "Failed:$FAILED_HOSTS"
+          
+          # Save results for report job
+          echo "$FAILED_HOSTS" > failed-hosts.txt
+          echo "$SUCCESS_HOSTS" > success-hosts.txt
+          
+          if [ -n "$FAILED_HOSTS" ]; then
+            echo "Some builds failed"
+            exit 1
+          fi
         continue-on-error: true
 
-      - name: Upload build log on failure
-        if: failure() || steps.build.outcome == 'failure'
+      - name: Upload build logs
+        if: always()
         uses: forgejo/upload-artifact@v4
         with:
-          name: build-failure-${{ matrix.host }}
-          path: build-output.txt
+          name: build-logs
+          path: build-*.txt
           retention-days: 7
 
+      - name: Upload build results
+        if: always()
+        uses: forgejo/upload-artifact@v4
+        with:
+          name: build-results
+          path: |
+            failed-hosts.txt
+            success-hosts.txt
+          retention-days: 1
+
       - name: Check build result
         run: |
           if [ "${{ steps.build.outcome }}" == "failure" ]; then
-            echo "Build failed for ${{ matrix.host }}"
+            echo "Some builds failed - check build-logs artifact"
             exit 1
           fi
 
@@ -114,13 +176,23 @@ jobs:
         with:
           name: flake-lock
 
-      - name: Download failure artifacts
+      - name: Download hosts list
+        uses: forgejo/download-artifact@v4
+        with:
+          name: hosts-list
+
+      - name: Download build results
+        uses: forgejo/download-artifact@v4
+        with:
+          name: build-results
+        continue-on-error: true
+
+      - name: Download build logs
         if: needs.build.result == 'failure'
         uses: forgejo/download-artifact@v4
         with:
-          pattern: build-failure-*
-          path: failures
-          merge-multiple: false
+          name: build-logs
+          path: logs
         continue-on-error: true
 
       - name: Create branch and commit
@@ -138,8 +210,8 @@ jobs:
         env:
           FORGEJO_TOKEN: ${{ secrets.FORGEJO_TOKEN }}
         run: |
-          HOSTS='${{ needs.check-updates.outputs.hosts }}'
-          HOST_LIST=$(echo "$HOSTS" | jq -r '.[] | "- " + .' | tr '\n' '\n')
+          HOSTS=$(cat hosts.json)
+          HOST_LIST=$(echo "$HOSTS" | jq -r '.[] | "- " + .')
           
           curl -X POST \
             -H "Authorization: token $FORGEJO_TOKEN" \
@@ -157,31 +229,27 @@ jobs:
         env:
           FORGEJO_TOKEN: ${{ secrets.FORGEJO_TOKEN }}
         run: |
-          # Collect failed hosts from artifact directories
           FAILED_HOSTS=""
           FAILURE_DETAILS=""
           
-          if [ -d "failures" ]; then
-            for dir in failures/build-failure-*; do
-              if [ -d "$dir" ]; then
-                HOST=$(basename "$dir" | sed 's/build-failure-//')
-                FAILED_HOSTS="$FAILED_HOSTS\n- $HOST"
-                
-                if [ -f "$dir/build-output.txt" ]; then
-                  # Get last 50 lines of build output
-                  LOG_TAIL=$(tail -50 "$dir/build-output.txt" | sed 's/"/\\"/g' | sed ':a;N;$!ba;s/\n/\\n/g')
-                  FAILURE_DETAILS="$FAILURE_DETAILS\n\n<details>\n<summary>$HOST build log (last 50 lines)</summary>\n\n\`\`\`\n$LOG_TAIL\n\`\`\`\n</details>"
-                fi
+          # Read failed hosts from build results
+          if [ -f "failed-hosts.txt" ]; then
+            for HOST in $(cat failed-hosts.txt); do
+              FAILED_HOSTS="$FAILED_HOSTS\n- $HOST"
+              
+              # Get build log if available
+              if [ -f "logs/build-${HOST}.txt" ]; then
+                LOG_TAIL=$(tail -50 "logs/build-${HOST}.txt" | sed 's/"/\\"/g' | sed ':a;N;$!ba;s/\n/\\n/g')
+                FAILURE_DETAILS="$FAILURE_DETAILS\n\n<details>\n<summary>$HOST build log (last 50 lines)</summary>\n\n\`\`\`\n$LOG_TAIL\n\`\`\`\n</details>"
               fi
             done
           fi
           
-          # If no failure artifacts found, list from matrix
           if [ -z "$FAILED_HOSTS" ]; then
             FAILED_HOSTS="\n- (Unable to determine failed hosts - check workflow logs)"
           fi
           
-          ISSUE_BODY="Weekly flake update failed to build some hosts.\n\n**Branch:** \`${{ steps.branch.outputs.branch_name }}\`\n**Run:** ${{ forge.server_url }}/${{ forge.repository }}/actions/runs/${{ forge.run_number }}\n\n**Failed hosts:**$FAILED_HOSTS\n$FAILURE_DETAILS\n\nGenerated on: $(date -Iseconds)"
+          ISSUE_BODY="Weekly flake update failed to build some hosts.\n\n**Branch:** \`${{ steps.branch.outputs.branch_name }}\`\n**Run:** ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}\n\n**Failed hosts:**$FAILED_HOSTS\n$FAILURE_DETAILS\n\nGenerated on: $(date -Iseconds)"
           
           curl -X POST \
             -H "Authorization: token $FORGEJO_TOKEN" \
@@ -190,10 +258,10 @@ jobs:
               \"title\": \"Build failure: weekly flake update $(date +%Y-%m-%d)\",
               \"body\": \"$ISSUE_BODY\"
             }" \
-            "${{ forge.server_url }}/api/v1/repos/${{ forge.repository }}/issues"
+            "${{ github.server_url }}/api/v1/repos/${{ github.repository }}/issues"
 
       - name: Cleanup
         if: always()
         run: |
           nix-collect-garbage -d
-          rm -rf result .direnv failures
+          rm -rf result .direnv logs

.forgejo/workflows/test-matrix.yaml

@@ -1,67 +0,0 @@
-name: shared matrix
-on:
-  push:
-  workflow_dispatch:
-
-jobs:
-  
-  test:
-    runs-on: nix
-    strategy:
-      matrix:
-        variant: ['bookworm', 'bullseye']
-        node: ['18', '20']
-    steps:
-      - uses: https://code.forgejo.org/actions/setup-node@v4
-        with:
-          node-version: '${{ matrix.node }}'
-  
-  define-matrix:
-    runs-on: nix
-
-    outputs:
-      colors: ${{ steps.colors.outputs.colors }}
-
-    steps:
-      - name: Define Colors
-        id: colors
-        run: |
-          echo 'colors=["red", "green", "blue"]' >> "$FORGEJO_OUTPUT"
-
-  produce-artifacts:
-    runs-on: nix
-    needs: define-matrix
-    strategy:
-      matrix:
-        color: ${{ fromJSON(needs.define-matrix.outputs.colors) }}
-
-    steps:
-      - name: Define Color
-        env:
-          color: ${{ matrix.color }}
-        run: |
-          echo "$color" > color
-      - name: Produce Artifact
-        uses: forgejo/upload-artifact@v4
-        with:
-          name: ${{ matrix.color }}
-          path: color
-
-  consume-artifacts:
-    runs-on: nix
-    needs:
-    - define-matrix
-    - produce-artifacts
-    strategy:
-      matrix:
-        color: ${{ fromJSON(needs.define-matrix.outputs.colors) }}
-
-    steps:
-    - name: Retrieve Artifact
-      uses: forgejo/download-artifact@v5
-      with:
-        name: ${{ matrix.color }}
-
-    - name: Report Color
-      run: |
-        cat color