Look up for plugins in parent package.json (#211)

packages/size-limit/load-plugins.js

@@ -14,7 +14,7 @@ class Plugins {
 }
 
 module.exports = function loadPlugins (pkg) {
-  if (!pkg || !pkg.packageJson) return []
+  if (!pkg || !pkg.packageJson) return new Plugins([])
 
   let list = toArray(pkg.packageJson.dependencies)
     .concat(toArray(pkg.packageJson.devDependencies))

packages/size-limit/run.js

@@ -1,5 +1,6 @@
 let readPkgUp = require('read-pkg-up')
 let ora = require('ora')
+let path = require('path')
 let chokidar = require('chokidar')
 
 let SizeLimitError = require('./size-limit-error')
@@ -23,6 +24,17 @@ function throttle (fn) {
   }
 }
 
+async function findPlugins (parentPkg) {
+  let plugins = loadPlugins(parentPkg)
+
+  if (!parentPkg || !plugins.isEmpty) return plugins
+
+  let cwd = path.resolve(parentPkg.path, '..', '..')
+  let pkg = await readPkgUp({ cwd })
+
+  return findPlugins(pkg)
+}
+
 module.exports = async process => {
   function hasArg (arg) {
     return process.argv.some(i => i === arg)
@@ -38,7 +50,7 @@ module.exports = async process => {
     }
 
     let pkg = await readPkgUp({ cwd: process.cwd() })
-    let plugins = loadPlugins(pkg)
+    let plugins = await findPlugins(pkg)
 
     if (hasArg('--help')) {
       return help.showHelp(plugins)

packages/size-limit/test/__snapshots__/run.test.js.snap

@@ -7,6 +7,14 @@ exports[`run allows to use peer dependencies in import 1`] = `
 "
 `;
 
+exports[`run find plugins in parent package.json 1`] = `
+"  
+  Size limit: 1 KB
+  Size:       20 B gzipped
+  
+"
+`;
+
 exports[`run returns zero bytes for empty file 1`] = `
 "  
   Size limit: 0 B

packages/size-limit/test/fixtures/nested/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "file",
+  "private": true,
+  "devDependencies": {
+    "@size-limit/file": ">= 0.0.0",
+    "size-limit": ">= 0.0.0"
+  }
+}

packages/size-limit/test/fixtures/nested/package/package.json

@@ -0,0 +1,10 @@
+{
+  "name": "package",
+  "private": true,
+  "size-limit": [
+    {
+      "name": "index",
+      "limit": "1 KB"
+    }
+  ]
+}

packages/size-limit/test/run.test.js

@@ -42,7 +42,7 @@ function createProcess (cwd, args = []) {
       if (cwd.includes('/')) {
         return cwd
       } else {
-        return fixture(cwd)
+        return fixture(...(Array.isArray(cwd) ? cwd : [cwd]))
       }
     },
     exit (code) {
@@ -291,4 +291,8 @@ describe(`run`, () => {
   it('shows debug on error', async () => {
     expect(clean(await error('internal-error', ['--debug']))).toMatchSnapshot()
   })
+
+  it('find plugins in parent package.json', async () => {
+    expect(clean(await check(['nested', 'package']))).toMatchSnapshot()
+  })
 })