chore: fix workflow to run on changed files

Author: hydazz

.github/workflows/lint.yaml

@@ -0,0 +1,241 @@
+---
+name: Validate
+
+on:
+  push:
+  pull_request:
+    branches:
+      - main
+
+concurrency:
+  group: ${{ github.ref }}-${{ github.workflow }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+jobs:
+  list-configs:
+    name: Discover changed ESPHome configs
+    runs-on: ubuntu-latest
+    outputs:
+      configs: ${{ steps.collect.outputs.configs }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Get changed files
+        id: changed-files
+        uses: bjw-s-labs/action-changed-files@1a5aeab1bfa64d0c4e786f501d5a3f1fad4a24da # v0.4.1
+        with:
+          patterns: |-
+            **/*.yaml
+            **/*.yml
+
+      - name: Collect config files
+        id: collect
+        env:
+          CHANGED_FILES: ${{ steps.changed-files.outputs.changed_files }}
+        run: |
+          python <<'PY'
+          import json
+          import os
+          from pathlib import Path
+
+          changed_files_str = os.environ.get("CHANGED_FILES", "[]")
+          try:
+              changed_files = json.loads(changed_files_str)
+          except json.JSONDecodeError:
+              changed_files = []
+
+          if not isinstance(changed_files, list):
+              changed_files = []
+
+          def first_friendly_name(path_str: str) -> str | None:
+            try:
+                path = Path(path_str)
+                if not path.exists():
+                    return None
+                with path.open("r", encoding="utf-8", errors="ignore") as f:
+                  for raw in f:
+                    line = raw.strip()
+                    if not line or line.startswith("#"):
+                      continue
+                    if line.startswith("friendly_name:"):
+                      value = line.split(":", 1)[1].strip()
+                      if (value.startswith('"') and value.endswith('"')) or (
+                        value.startswith("'") and value.endswith("'")
+                      ):
+                        value = value[1:-1].strip()
+                      return value or None
+            except Exception:
+                pass
+            return None
+
+          configs = []
+
+          for f in changed_files:
+            friendly_name = first_friendly_name(f)
+            if not friendly_name:
+              continue
+
+            configs.append(
+              {
+                "file": f,
+                "friendly_name": friendly_name,
+              }
+            )
+
+          with open(os.environ["GITHUB_OUTPUT"], "a", encoding="utf-8") as fh:
+            fh.write(f"configs={json.dumps(configs)}\n")
+          PY
+
+      - name: Generate Summary
+        uses: actions/github-script@v7
+        env:
+          CONFIGS: ${{ steps.collect.outputs.configs }}
+          CHANGED_FILES: ${{ steps.changed-files.outputs.changed_files }}
+        with:
+          script: |
+            const configs = JSON.parse(process.env.CONFIGS || '[]');
+            const changedFiles = JSON.parse(process.env.CHANGED_FILES || '[]');
+
+            // Find files that were changed but don't have friendly_name (not ESPHome configs)
+            const skippedFiles = changedFiles.filter(file =>
+              !configs.some(config => config.file === file) &&
+              (file.endsWith('.yaml') || file.endsWith('.yml')) &&
+              !file.includes('secrets.yaml') &&
+              !file.includes('.github/')
+            );
+
+            let summaryText = '';
+
+            if (configs.length === 0) {
+              summaryText += '## 🔍 ESPHome Configuration Validation\n\n';
+              summaryText += '### ℹ️ No ESPHome configs to validate\n\n';
+              if (changedFiles.length > 0) {
+                summaryText += `**Changed files:** ${changedFiles.length}\n`;
+                summaryText += `**ESPHome configs:** 0\n\n`;
+              }
+            } else {
+              const configList = configs.map(config => `- **${config.friendly_name}** (\`${config.file}\`)`);
+
+              summaryText += '## 🔍 ESPHome Configuration Validation\n\n';
+              summaryText += '### 📋 Configs to validate:\n\n';
+              summaryText += configList.join('\n') + '\n\n';
+              summaryText += `**Total configs:** ${configs.length}\n\n`;
+            }
+
+            if (skippedFiles.length > 0) {
+              summaryText += '### ⚠️ Skipped files (not ESPHome configs):\n\n';
+              skippedFiles.forEach(file => {
+                summaryText += `- \`${file}\` (no friendly_name found)\n`;
+                core.warning(`File ${file} appears to be a YAML file but doesn't contain a friendly_name - skipping validation`);
+              });
+              summaryText += '\n';
+            }
+
+            core.summary.addRaw(summaryText).write();
+
+  validate:
+    name: Validate ESPHome configs
+    runs-on: ubuntu-latest
+    needs: list-configs
+    if: needs.list-configs.outputs.configs != '[]'
+    strategy:
+      fail-fast: false
+      matrix:
+        config: ${{ fromJson(needs.list-configs.outputs.configs) }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+
+      - name: Install ESPHome
+        run: pip install esphome
+
+      - name: Provide stub secrets.yaml
+        run: |
+          cat > secrets.yaml <<'EOF'
+          wifi_ssid: "dummy-ssid"
+          wifi_password: "dummy-password"
+          api_key: "NTaJhzu9F3FQQW/TBqjSkr50euZwR/Po6Op50tmceiw="
+          ota_password: "dummy-ota-password"
+          EOF
+
+      - name: Validate config
+        id: validate
+        run: |
+          set -o pipefail
+          esphome config "${{ matrix.config.file }}" 2>&1 | tee esphome.log
+
+      - name: Save resolved config
+        if: success()
+        run: |
+          esphome config "${{ matrix.config.file }}" > resolved-config.txt
+
+      - name: Upload log
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: esphome-log-${{ matrix.config.friendly_name }}
+          path: esphome.log
+          if-no-files-found: ignore
+
+      - name: Upload resolved config
+        if: success()
+        uses: actions/upload-artifact@v4
+        with:
+          name: esphome-config-${{ matrix.config.friendly_name }}
+          path: resolved-config.txt
+          if-no-files-found: ignore
+
+      - name: Add result to summary
+        if: always()
+        uses: actions/github-script@v7
+        env:
+          CONFIG_NAME: ${{ matrix.config.friendly_name }}
+          CONFIG_FILE: ${{ matrix.config.file }}
+          JOB_STATUS: ${{ job.status }}
+        with:
+          script: |-
+            const fs = require('fs');
+            const {
+              CONFIG_NAME,
+              CONFIG_FILE,
+              JOB_STATUS,
+              GITHUB_SERVER_URL,
+              GITHUB_REPOSITORY,
+              GITHUB_RUN_ID,
+            } = process.env;
+
+            const ok = JOB_STATUS === 'success';
+            const icon = ok ? '✅' : '❌';
+
+            let summary = `${icon} ${CONFIG_NAME} (\`${CONFIG_FILE}\`) - ${JOB_STATUS}\n\n`;
+
+            if (!ok) {
+              try {
+                const lines = fs.readFileSync('esphome.log', 'utf8').split('\n');
+                const tail = lines.slice(-40).join('\n');
+                summary += 'Last lines of log:\n\n';
+                summary += '```text\n' + tail + '\n```\n\n';
+              } catch (err) {
+                core.warning(`Could not read esphome.log: ${err.message}`);
+              }
+            }
+
+            const runUrl = `${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}/actions/runs/${GITHUB_RUN_ID}`;
+            summary += `[View full logs for this run](${runUrl})\n\n`;
+            summary += `Artifacts:\n`;
+            summary += `- \`esphome-log-${CONFIG_NAME}\` (full log)\n`;
+            if (ok) {
+              summary += `- \`esphome-config-${CONFIG_NAME}\` (resolved/validated config)\n`;
+            }
+
+            core.summary.addRaw(summary).write();