Add travis CI plugin

packages/knip/fixtures/plugins/travis/.travis.yml

@@ -0,0 +1,9 @@
+sudo: false
+
+language: node_js
+
+node_js:
+  - 12
+
+before_deploy:
+  - ./node_modules/.bin/patch-version

packages/knip/fixtures/plugins/travis/package.json

@@ -0,0 +1,4 @@
+{
+  "name": "@fixtures/travis",
+  "version": "*"
+}

packages/knip/schema.json

@@ -520,6 +520,10 @@
           "title": "tailwind plugin configuration (https://knip.dev/reference/plugins/tailwind)",
           "$ref": "#/definitions/plugin"
         },
+        "travis": {
+          "title": "travis plugin configuration (https://knip.dev/reference/plugins/travis)",
+          "$ref": "#/definitions/plugin"
+        },
         "tsup": {
           "title": "tsup plugin configuration (https://knip.dev/reference/plugins/tsup)",
           "$ref": "#/definitions/plugin"

packages/knip/src/ConfigurationValidator.ts

@@ -137,6 +137,7 @@ const pluginsSchema = z.object({
   svelte: pluginSchema,
   syncpack: pluginSchema,
   tailwind: pluginSchema,
+  travis: pluginSchema,
   tsup: pluginSchema,
   typedoc: pluginSchema,
   typescript: pluginSchema,

packages/knip/src/plugins/index.ts

@@ -58,6 +58,7 @@ export { default as stylelint } from './stylelint/index.js';
 export { default as svelte } from './svelte/index.js';
 export { default as syncpack } from './syncpack/index.js';
 export { default as tailwind } from './tailwind/index.js';
+export { default as travis } from './travis/index.js';
 export { default as tsup } from './tsup/index.js';
 export { default as typedoc } from './typedoc/index.js';
 export { default as typescript } from './typescript/index.js';

packages/knip/src/plugins/travis/index.ts

@@ -0,0 +1,33 @@
+import type { IsPluginEnabled, Plugin, ResolveConfig } from '#p/types/plugins.js';
+import { _glob } from '#p/util/glob.js';
+import { getDependenciesFromScripts } from '../../util/plugin.js';
+
+// https://docs.travis-ci.com/user/customizing-the-build/
+
+const title = 'Travis CI';
+
+const enablers = 'This plugin is enabled when a `.travis.yml` file is found in the root folder.';
+
+const isEnabled: IsPluginEnabled = async ({ cwd }) => Boolean(await _glob({ cwd, patterns: ['.travis.yml'] }));
+
+const config = ['.travis.yml'];
+
+const resolveConfig: ResolveConfig = async (config, options) => {
+  if (!config) return [];
+
+  const beforeDeploy = [config.before_deploy ?? []].flat();
+  const beforeInstall = [config.before_install ?? []].flat();
+  const beforeScript = [config.before_script ?? []].flat();
+
+  const scripts = [...beforeDeploy, ...beforeInstall, ...beforeScript];
+
+  return getDependenciesFromScripts(scripts, { ...options, knownGlobalsOnly: true });
+};
+
+export default {
+  title,
+  enablers,
+  isEnabled,
+  config,
+  resolveConfig,
+} satisfies Plugin;

packages/knip/src/typescript/ast-helpers.ts

@@ -196,7 +196,7 @@ const isExported = (node: ts.Node): boolean => {
   return node.parent ? isExported(node.parent) : false;
 };
 
-const isTypeDeclaration = (node: ts.Node) =>
+export const isTypeDeclaration = (node: ts.Node) =>
   ts.isInterfaceDeclaration(node) || ts.isTypeAliasDeclaration(node) || ts.isEnumDeclaration(node);
 
 const getAncestorTypeDeclaration = (node: ts.Node) => {

packages/knip/test/plugins/travis.test.ts

@@ -0,0 +1,24 @@
+import { test } from 'bun:test';
+import assert from 'node:assert/strict';
+import { main } from '../../src/index.js';
+import { resolve } from '../../src/util/path.js';
+import baseArguments from '../helpers/baseArguments.js';
+import baseCounters from '../helpers/baseCounters.js';
+
+const cwd = resolve('fixtures/plugins/travis');
+
+test('Find dependencies with the travis plugin', async () => {
+  const { issues, counters } = await main({
+    ...baseArguments,
+    cwd,
+  });
+
+  assert(issues.binaries['.travis.yml']['patch-version']);
+
+  assert.deepEqual(counters, {
+    ...baseCounters,
+    binaries: 1,
+    processed: 0,
+    total: 0,
+  });
+});