catalog gen workflow

Author: 7w1

.github/workflows/catalog.yml

@@ -0,0 +1,42 @@
+name: Theme catalog
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - '**.css'
+      - 'catalog.json'
+      - 'scripts/build-catalog.mjs'
+      - '.github/workflows/catalog.yml'
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+concurrency:
+  group: theme-catalog-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Build catalog.json
+        env:
+          GITHUB_REPOSITORY: ${{ github.repository }}
+          GITHUB_REF_NAME: ${{ github.ref_name }}
+        run: node scripts/build-catalog.mjs
+
+      - name: Commit if changed
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git add catalog.json
+          if git diff --staged --quiet; then
+            echo "catalog.json already up to date."
+          else
+            git commit -m "chore: regenerate catalog.json"
+            git push
+          fi

catalog.json

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+{
+  "version": 1,
+  "repository": "SableClient/themes",
+  "ref": "main",
+  "themes": []
+}

scripts/build-catalog.mjs

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+#!/usr/bin/env node
+import fs from 'fs';
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const REPO_ROOT = path.join(__dirname, '..');
+
+const PREVIEW_SUFFIX = '.preview.sable.css';
+const FULL_SUFFIX = '.sable.css';
+
+const repo =
+  process.env.GITHUB_REPOSITORY?.trim() ||
+  process.env.CATALOG_REPOSITORY?.trim() ||
+  'SableClient/themes';
+const ref = process.env.GITHUB_REF_NAME?.trim() || process.env.CATALOG_REF?.trim() || 'main';
+
+function rawFileUrl(fileName) {
+  return `https://raw.githubusercontent.com/${repo}/${ref}/${fileName}`;
+}
+
+function buildCatalog() {
+  const files = fs.readdirSync(REPO_ROOT);
+  const previewFiles = files.filter((f) => f.endsWith(PREVIEW_SUFFIX));
+
+  const themes = [];
+  for (const previewName of previewFiles) {
+    const basename = previewName.slice(0, -PREVIEW_SUFFIX.length);
+    const fullName = `${basename}${FULL_SUFFIX}`;
+    if (!files.includes(fullName)) {
+      console.warn(`skip ${previewName}: missing ${fullName}`);
+      continue;
+    }
+    themes.push({
+      basename,
+      previewUrl: rawFileUrl(previewName),
+      fullUrl: rawFileUrl(fullName),
+    });
+  }
+
+  themes.sort((a, b) => a.basename.localeCompare(b.basename));
+
+  return {
+    version: 1,
+    repository: repo,
+    ref,
+    themes,
+  };
+}
+
+const catalog = buildCatalog();
+const outPath = path.join(REPO_ROOT, 'catalog.json');
+fs.writeFileSync(outPath, `${JSON.stringify(catalog, null, 2)}\n`, 'utf8');
+console.log(`Wrote ${outPath} (${catalog.themes.length} theme pairs)`);