Build: Use Knip for project linting

.circleci/config.yml

@@ -192,6 +192,22 @@ jobs:
             yarn lint
       - report-workflow-on-failure
       - cancel-workflow-on-failure
+  knip:
+    executor:
+      class: large
+      name: sb_node_22_classic
+    steps:
+      - git-shallow-clone/checkout_advanced:
+          clone_options: "--depth 1 --verbose"
+      - attach_workspace:
+          at: .
+      - run:
+          name: Knip
+          command: |
+            cd code
+            yarn knip --no-exit-code
+      - report-workflow-on-failure
+      - cancel-workflow-on-failure
   check:
     executor:
       class: xlarge
@@ -685,6 +701,9 @@ workflows:
       - lint:
           requires:
             - build
+      - knip:
+          requires:
+            - build
       - check:
           requires:
             - build
@@ -751,6 +770,9 @@ workflows:
       - lint:
           requires:
             - build
+      - knip:
+          requires:
+            - build
       - check:
           requires:
             - build
@@ -818,6 +840,9 @@ workflows:
       - lint:
           requires:
             - build
+      - knip:
+          requires:
+            - build
       - check:
           requires:
             - build

code/package.json

@@ -36,6 +36,7 @@
     "generate-sandboxes": "yarn --cwd ../scripts generate-sandboxes",
     "github-release": "github-release-from-changelog",
     "i": "yarn --cwd .. i",
+    "knip": "VITE_CJS_IGNORE_WARNING=1 ../scripts/node_modules/.bin/knip --config ../scripts/knip.config.ts",
     "lint": "yarn lint:js && yarn lint:md",
     "lint:ejs": "ejslint **/*.ejs",
     "lint:js": "yarn lint:js:cmd .  --quiet",

package.json

@@ -5,6 +5,7 @@
     "get-report-message": "cd scripts; yarn get-report-message",
     "get-template": "cd scripts; yarn get-template",
     "i": "yarn --cwd scripts && yarn --cwd code",
+    "knip": "cd code; yarn knip",
     "lint": "cd code; yarn lint",
     "nx": "cd code; yarn nx",
     "pretty-docs": "cd scripts; yarn install >/dev/null; yarn docs:prettier:write",

scripts/knip.config.ts

@@ -0,0 +1,93 @@
+import { join, relative } from 'node:path';
+
+import fg from 'fast-glob';
+import type { KnipConfig } from 'knip';
+import { match } from 'minimatch';
+
+// Files we want to exclude from analysis should be negated project patterns, not `ignores`
+// docs: https://knip.dev/guides/configuring-project-files
+const project = [
+  'src/**/*.{js,jsx,ts,tsx}',
+  '!**/__search-files-tests__/**',
+  '!**/__testfixtures__/**',
+  '!**/__mocks-ng-workspace__/**',
+  '!**/__mockdata__/**',
+];
+
+// Adding an explicit MDX "compiler", as the dependency knip looks for isn't listed (@mdx-js/mdx or astro)
+// Alternatively, we could ignore a few false positives
+// docs: https://knip.dev/features/compilers
+const importMatcher = /import[^'"]+['"]([^'"]+)['"]/g;
+const fencedCodeBlockMatcher = /```[\s\S]*?```/g;
+const mdx = (text: string) =>
+  [...text.replace(fencedCodeBlockMatcher, '').matchAll(importMatcher)].join('\n');
+
+const baseConfig = {
+  ignoreWorkspaces: ['renderers/svelte'], // ignored: Error [ERR_PACKAGE_PATH_NOT_EXPORTED]: No "exports" main defined in code/node_modules/@sveltejs/vite-plugin-svelte/package.json
+
+  // storybook itself configured (only) in root
+  storybook: { entry: ['**/*.@(mdx|stories.@(mdx|js|jsx|mjs|ts|tsx))'] },
+
+  workspaces: {
+    '.': {
+      project,
+    },
+    'addons/*': {
+      project,
+    },
+    'builders/*': {
+      project,
+    },
+    core: {
+      entry: ['src/index.ts', 'src/cli/bin/index.ts', 'src/*/{globals*,index,runtime}.ts'],
+      project,
+    },
+    'frameworks/*': {
+      entry: [
+        // these extra entries we only need for frameworks/angular and frameworks/ember it seems
+        'src/index.ts',
+        'src/builders/{build,start}-storybook/index.ts',
+        'src/**/docs/{index,config}.{js,ts}',
+      ],
+      project,
+    },
+    'lib/*': {
+      project,
+    },
+    'presets/*': {
+      project,
+    },
+    'renderers/*': {
+      project,
+    },
+  },
+  compilers: {
+    mdx,
+  },
+} satisfies KnipConfig;
+
+// Adds package.json#bundler.entries etc. to each workspace config `entry: []`
+export const addBundlerEntries = async (config: KnipConfig) => {
+  const baseDir = join(__dirname, '../code');
+  const rootManifest = await import(join(baseDir, 'package.json'));
+  const workspaceDirs = await fg(rootManifest.workspaces.packages, { cwd: baseDir, onlyDirectories: true });
+  const workspaceDirectories = workspaceDirs.map((dir) => relative(baseDir, join(baseDir, dir)));
+  for (const wsDir of workspaceDirectories) {
+    for (const configKey of Object.keys(baseConfig.workspaces)) {
+      if (match([wsDir], configKey)) {
+        const manifest = await import(join(baseDir, wsDir, 'package.json'));
+        const configEntries = (config.workspaces[configKey].entry as string[]) ?? [];
+        const bundler = manifest?.bundler;
+        for (const value of Object.values(bundler ?? {})) {
+          if (Array.isArray(value)) {
+            configEntries.push(...value);
+          }
+        }
+        config.workspaces[configKey].entry = Array.from(new Set(configEntries));
+      }
+    }
+  }
+  return config;
+};
+
+export default addBundlerEntries(baseConfig);

scripts/package.json

@@ -135,6 +135,7 @@
     "husky": "^4.3.7",
     "json5": "^2.2.3",
     "junit-xml": "^1.2.0",
+    "knip": "^5.30.1",
     "lint-staged": "^15.2.7",
     "lodash": "^4.17.21",
     "memoizerific": "^1.11.3",