Render documentation diagrams as static Mermaid assets

docs/scripts/render-mermaid-assets.mjs

@@ -0,0 +1,80 @@
+import { mkdir, mkdtemp, rm, writeFile } from 'node:fs/promises';
+import os from 'node:os';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { spawn } from 'node:child_process';
+import { diagramSources } from '../.vitepress/theme/components/diagramSources.ts';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const docsRoot = path.resolve(__dirname, '..');
+const publicRoot = path.join(docsRoot, 'public');
+const diagramsDir = path.join(publicRoot, 'diagrams');
+const prototypesDir = path.join(publicRoot, 'prototypes');
+const puppeteerConfig = path.join(__dirname, 'puppeteer-config.json');
+const mermaidConfig = path.join(__dirname, 'mermaid-config.json');
+
+const prototypeNames = new Set([
+  'dashboard',
+  'catalog-grid',
+  'product-card',
+  'cart',
+  'client-order',
+  'bonus-cabinet',
+  'manager-order',
+  'manager-orders',
+]);
+
+function runCommand(command, args) {
+  return new Promise((resolve, reject) => {
+    const child = spawn(command, args, {
+      cwd: docsRoot,
+      stdio: 'inherit',
+    });
+
+    child.on('exit', (code) => {
+      if (code === 0) {
+        resolve();
+        return;
+      }
+
+      reject(new Error(`${command} ${args.join(' ')} exited with code ${code ?? 'unknown'}`));
+    });
+
+    child.on('error', reject);
+  });
+}
+
+async function renderDiagram(name, source) {
+  const targetDir = prototypeNames.has(name) ? prototypesDir : diagramsDir;
+  const tmpDir = await mkdtemp(path.join(os.tmpdir(), `mermaid-${name}-`));
+  const inputFile = path.join(tmpDir, `${name}.mmd`);
+  const outputFile = path.join(targetDir, `${name}.svg`);
+
+  try {
+    await writeFile(inputFile, source, 'utf8');
+    await runCommand('pnpm', [
+      'exec',
+      'mmdc',
+      '-i',
+      inputFile,
+      '-o',
+      outputFile,
+      '-b',
+      'transparent',
+      '-c',
+      mermaidConfig,
+      '-p',
+      puppeteerConfig,
+    ]);
+  } finally {
+    await rm(tmpDir, { recursive: true, force: true });
+  }
+}
+
+await mkdir(diagramsDir, { recursive: true });
+await mkdir(prototypesDir, { recursive: true });
+
+for (const [name, source] of Object.entries(diagramSources)) {
+  await renderDiagram(name, source);
+}