Add workspace-detector workflow

Author: dodok8

.github/workflows/workspace-detector.yaml

@@ -0,0 +1,150 @@
+name: workspace-detector
+on:
+  pull_request:
+  push:
+    branches:
+      - workspace-detector
+  workflow_dispatch:
+
+jobs:
+  detect-changes:
+    runs-on: ubuntu-latest
+    outputs:
+      changed_workspaces: ${{ steps.detect.outputs.changed_workspaces }}
+      changed_workspaces_json: ${{ steps.detect.outputs.changed_workspaces_json }}
+      all_workspaces: ${{ steps.detect.outputs.all_workspaces }}
+      has_changes: ${{ steps.detect.outputs.has_changes }}
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+
+    - uses: ./.github/actions/setup-mise
+
+    - name: Detect changed workspaces
+      id: detect
+      run: |
+        set -e
+
+        # Determine base commit for comparison
+        if [[ "${{ github.event_name }}" == "pull_request" ]]; then
+          base_ref="${{ github.event.pull_request.base.sha }}"
+        else
+          # For push events, compare with previous commit
+          if git rev-parse HEAD~1 >/dev/null 2>&1; then
+            base_ref="HEAD~1"
+          else
+            # First commit in repository
+            base_ref=""
+          fi
+        fi
+
+        echo "Base ref: $base_ref"
+        echo ""
+
+        # Use pnpm to detect changed workspaces
+        if [[ -n "$base_ref" ]]; then
+          # Get list of changed workspaces using pnpm --filter
+          # The [...$base_ref] syntax filters to packages that have changes since base_ref
+          changed_output=$(pnpm list --recursive --depth -1 --filter "...[${base_ref}]" --json 2>/dev/null || echo "[]")
+        else
+          # First commit - all workspaces are considered changed
+          changed_output=$(pnpm list --recursive --depth -1 --json 2>/dev/null || echo "[]")
+        fi
+
+        echo "Changed packages output:"
+        echo "$changed_output" | jq .
+        echo ""
+
+        # Extract workspace paths from pnpm output
+        changed_workspaces=$(echo "$changed_output" | jq -r '.[].path // empty' | sed "s|^$PWD/||" || echo "")
+
+        # Convert to array
+        readarray -t changed_array <<< "$changed_workspaces"
+
+        # Filter out empty entries
+        filtered_changed=()
+        for ws in "${changed_array[@]}"; do
+          if [[ -n "$ws" ]]; then
+            filtered_changed+=("$ws")
+            echo "✓ Changed: $ws"
+          fi
+        done
+
+        echo ""
+
+        # Get all workspaces for reference
+        all_output=$(pnpm list --recursive --depth -1 --json 2>/dev/null || echo "[]")
+        all_workspaces=$(echo "$all_output" | jq -r '.[].path // empty' | sed "s|^$PWD/||" || echo "")
+
+        # Output results
+        if [[ ${#filtered_changed[@]} -eq 0 ]]; then
+          echo "No workspace changes detected"
+          echo "changed_workspaces=" >> "$GITHUB_OUTPUT"
+          echo "changed_workspaces_json=[]" >> "$GITHUB_OUTPUT"
+          echo "has_changes=false" >> "$GITHUB_OUTPUT"
+        else
+          echo "Changed workspaces: ${filtered_changed[*]}"
+          # Output as space-separated string
+          echo "changed_workspaces=${filtered_changed[*]}" >> "$GITHUB_OUTPUT"
+          # Output as JSON array (compact format, no newlines)
+          json_array=$(printf '%s\n' "${filtered_changed[@]}" | jq -R . | jq -s -c .)
+          echo "changed_workspaces_json=$json_array" >> "$GITHUB_OUTPUT"
+          echo "has_changes=true" >> "$GITHUB_OUTPUT"
+        fi
+
+        # Output all workspaces for reference (compact format, no newlines)
+        all_workspaces_json=$(echo "$all_workspaces" | grep -v '^$' | jq -R . | jq -s -c . || echo "[]")
+        echo "all_workspaces=$all_workspaces_json" >> "$GITHUB_OUTPUT"
+
+    - name: Display detection results
+      run: |
+        echo "## Workspace Change Detection Results" >> "$GITHUB_STEP_SUMMARY"
+        echo "" >> "$GITHUB_STEP_SUMMARY"
+
+        if [[ "${{ steps.detect.outputs.has_changes }}" == "true" ]]; then
+          echo "### Changed Workspaces" >> "$GITHUB_STEP_SUMMARY"
+          echo "" >> "$GITHUB_STEP_SUMMARY"
+          echo '${{ steps.detect.outputs.changed_workspaces_json }}' | jq -r '.[] | "- `" + . + "`"' >> "$GITHUB_STEP_SUMMARY"
+        else
+          echo "No workspace changes detected." >> "$GITHUB_STEP_SUMMARY"
+        fi
+
+        echo "" >> "$GITHUB_STEP_SUMMARY"
+        echo "### All Workspaces" >> "$GITHUB_STEP_SUMMARY"
+        echo "" >> "$GITHUB_STEP_SUMMARY"
+        echo '${{ steps.detect.outputs.all_workspaces }}' | jq -r '.[] | "- `" + . + "`"' >> "$GITHUB_STEP_SUMMARY"
+
+  # Example job showing how to use the detection results
+  example-conditional-job:
+    needs: detect-changes
+    if: needs.detect-changes.outputs.has_changes == 'true'
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        workspace: ${{ fromJson(needs.detect-changes.outputs.changed_workspaces_json) }}
+    steps:
+    - uses: actions/checkout@v4
+    - uses: ./.github/actions/setup-mise
+    - name: Process changed workspace
+      run: |
+        echo "Processing workspace: ${{ matrix.workspace }}"
+        # Add workspace-specific commands here
+        # For example:
+        # cd "${{ matrix.workspace }}" && deno check .
+        # cd "${{ matrix.workspace }}" && deno test
+        # Or use pnpm filters:
+        # pnpm --filter "${{ matrix.workspace }}" test
+
+  # Test @fedify/cli when packages/cli changes
+  test-cli-init:
+    needs: detect-changes
+    if: contains(needs.detect-changes.outputs.changed_workspaces, 'packages/cli')
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: ./.github/actions/setup-mise
+    - name: Run deno task test-init for @fedify/cli
+      run: |
+        cd packages/cli
+        deno task test-init