feat(nx-dev): conformance rule for blog post description

Author: juristr

Diff for: nx.json

@@ -249,6 +249,13 @@
   "defaultBase": "master",
   "conformance": {
     "rules": [
+      {
+        "rule": "@nx/workspace-plugin/conformance-rules/blog-description",
+        "projects": ["docs"],
+        "options": {
+          "mdGlobPattern": "blog/**/*.md"
+        }
+      },
       {
         "rule": "@nx/workspace-plugin/conformance-rules/project-package-json",
         "projects": [

Diff for: package.json

@@ -86,9 +86,9 @@
     "@nx/rsbuild": "20.4.0-beta.2",
     "@nx/rspack": "20.4.0-beta.2",
     "@nx/storybook": "20.4.0-beta.2",
+    "@nx/vite": "20.4.0-beta.2",
     "@nx/web": "20.4.0-beta.2",
     "@nx/webpack": "20.4.0-beta.2",
-    "@nx/vite": "20.4.0-beta.2",
     "@phenomnomnominal/tsquery": "~5.0.1",
     "@playwright/test": "^1.36.1",
     "@pmmmwh/react-refresh-webpack-plugin": "^0.5.7",
@@ -102,8 +102,8 @@
     "@rollup/plugin-json": "^6.1.0",
     "@rollup/plugin-node-resolve": "^15.2.3",
     "@rollup/plugin-url": "^8.0.2",
-    "@rspack/core": "1.1.6",
     "@rsbuild/core": "1.1.8",
+    "@rspack/core": "1.1.6",
     "@rspack/dev-server": "1.0.9",
     "@rspack/plugin-minify": "^0.7.5",
     "@rspack/plugin-react-refresh": "^1.0.0",
@@ -136,6 +136,7 @@
     "@types/jasmine": "~2.8.6",
     "@types/jasminewd2": "~2.0.3",
     "@types/jest": "29.5.12",
+    "@types/js-yaml": "^4.0.9",
     "@types/marked": "^2.0.0",
     "@types/node": "20.16.10",
     "@types/npm-package-arg": "6.1.1",
@@ -227,6 +228,7 @@
     "jest-runtime": "29.7.0",
     "jest-util": "29.7.0",
     "js-tokens": "^4.0.0",
+    "js-yaml": "^4.1.0",
     "jsonc-eslint-parser": "^2.1.0",
     "jsonc-parser": "3.2.0",
     "kill-port": "^1.6.1",

Diff for: pnpm-lock.yaml

@@ -0,0 +1,80 @@
+import { readFileSync, existsSync } from 'node:fs';
+import { join } from 'node:path';
+import { load as yamlLoad } from 'js-yaml';
+import { workspaceRoot } from '@nx/devkit';
+import { sync as globSync } from 'glob';
+import {
+  createConformanceRule,
+  type ProjectFilesViolation,
+} from '@nx/powerpack-conformance';
+
+export default createConformanceRule<{ mdGlobPattern: string }>({
+  name: 'blog-description',
+  category: 'consistency',
+  description:
+    'Ensures that blog posts have a description in their frontmatter',
+  reporter: 'project-files-reporter',
+  implementation: async ({ projectGraph, ruleOptions }) => {
+    const violations: ProjectFilesViolation[] = [];
+    const { mdGlobPattern } = ruleOptions;
+
+    // Look for the docs project
+    const docsProject = Object.values(projectGraph.nodes).find(
+      (project) => project.name === 'docs'
+    );
+
+    if (!docsProject) {
+      return {
+        severity: 'low',
+        details: {
+          violations: [],
+        },
+      };
+    }
+
+    const blogPattern = join(
+      workspaceRoot,
+      docsProject.data.root,
+      mdGlobPattern
+    );
+    const files = findMarkdownFiles(blogPattern);
+
+    for (const file of files) {
+      const content = readFileSync(file, 'utf-8');
+      const frontmatterMatch = content.match(/^---\n([\s\S]*?)\n---/);
+
+      // Only check files with frontmatter
+      if (frontmatterMatch) {
+        try {
+          const frontmatter = yamlLoad(frontmatterMatch[1]) as Record<
+            string,
+            unknown
+          >;
+
+          if (!frontmatter.description) {
+            violations.push({
+              message:
+                'Blog posts with frontmatter must have a description field',
+              sourceProject: docsProject.name,
+              file: file,
+            });
+          }
+        } catch (e) {
+          // If YAML parsing fails, we skip the file
+          continue;
+        }
+      }
+    }
+
+    return {
+      severity: 'high',
+      details: {
+        violations,
+      },
+    };
+  },
+});
+
+function findMarkdownFiles(pattern: string): string[] {
+  return globSync(pattern);
+}

Diff for: tools/workspace-plugin/src/conformance-rules/blog-description/index.ts

@@ -0,0 +1,11 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "type": "object",
+  "properties": {
+    "mdGlobPattern": {
+      "type": "string",
+      "description": "The glob pattern to use to find the markdown files to analyze"
+    }
+  },
+  "additionalProperties": false
+}