feat: rebuild when package.json dependencies changed

src/index.ts

@@ -2,7 +2,7 @@ import path from 'path'
 import fs from 'fs'
 import { Worker } from 'worker_threads'
 import { removeFiles, debouncePromise, slash, MaybePromise } from './utils'
-import { loadTsupConfig } from './load'
+import { getDepsHash, loadTsupConfig } from './load'
 import glob from 'globby'
 import { loadTsConfig } from 'bundle-require'
 import { handleError, PrettyError } from './errors'
@@ -185,6 +185,8 @@ export async function build(_options: Options) {
             let onSuccessCleanup: (() => any) | undefined | void
             /** Files imported by the entry */
             const buildDependencies: Set<string> = new Set()
+
+            let depsHash = await getDepsHash(process.cwd())
 
             const doOnSuccessCleanup = async () => {
               if (onSuccessProcess) {
@@ -319,14 +321,27 @@ export async function build(_options: Options) {
                 ignorePermissionErrors: true,
                 ignored,
               })
-              watcher.on('all', (type, file) => {
+              watcher.on('all', async (type, file) => {
                 file = slash(file)
                 // By default we only rebuild when imported files change
                 // If you specify custom `watch`, a string or multiple strings
                 // We rebuild when those files change
-                if (options.watch === true && !buildDependencies.has(file)) {
+                let shouldSkipChange = false
+
+                if (options.watch === true ) {
+                  if (file === 'package.json') {
+                    const currentHash = await getDepsHash(process.cwd())
+                    shouldSkipChange = currentHash === depsHash
+                    depsHash = currentHash
+                  } else if (!buildDependencies.has(file)) {
+                    shouldSkipChange = true
+                  }
+                }
+
+                if (shouldSkipChange) {
                   return
                 }
+
                 logger.info('CLI', `Change detected: ${type} ${file}`)
                 debouncedBuildAll()
               })

src/load.ts

@@ -3,7 +3,7 @@ import JoyCon from 'joycon'
 import path from 'path'
 import { bundleRequire } from 'bundle-require'
 import { defineConfig } from './'
-import { jsoncParse } from './utils'
+import { hash, jsoncParse } from './utils'
 
 const joycon = new JoyCon()
 
@@ -77,13 +77,16 @@ export async function loadTsupConfig(
   return {}
 }
 
-export async function loadPkg(cwd: string) {
+export async function loadPkg(cwd: string, clearCache: boolean = false) {
+  if (clearCache) {
+    joycon.clearCache();
+  }
   const { data } = await joycon.load(['package.json'], cwd, path.dirname(cwd))
   return data || {}
 }
 
-export async function getDeps(cwd: string) {
-  const data = await loadPkg(cwd)
+export async function getDeps(cwd: string, clearCache: boolean = false) {
+  const data = await loadPkg(cwd, clearCache)
 
   const deps = Array.from(
     new Set([
@@ -94,3 +97,8 @@ export async function getDeps(cwd: string) {
 
   return deps
 }
+
+export async function getDepsHash(cwd: string) {
+  const deps = await getDeps(cwd, true)
+  return hash(deps.join(','))
+}

src/utils.ts

@@ -1,3 +1,4 @@
+import { createHash } from 'crypto'
 import fs from 'fs'
 import glob from 'globby'
 import resolveFrom from 'resolve-from'
@@ -129,3 +130,7 @@ export function jsoncParse(data: string) {
     return {}
   }
 }
+
+export function hash(content: string) {
+  return createHash('sha256').update(content).digest('hex');
+}

test/__snapshots__/index.test.ts.snap

@@ -167,6 +167,15 @@ console.log(import_node_fs.default);
 "
 `;
 
+exports[`not bundle \`package/subpath\` in dts (resolve) 1`] = `
+"import * as foo_bar from 'foo/bar';
+
+declare const stuff: foo_bar.Foobar;
+
+export { stuff };
+"
+`;
+
 exports[`simple 1`] = `
 "\\"use strict\\";
 var __defProp = Object.defineProperty;
@@ -204,15 +213,6 @@ var input_default = foo_default;
 "
 `;
 
-exports[`not bundle \`package/subpath\` in dts (resolve) 1`] = `
-"import * as foo_bar from 'foo/bar';
-
-declare const stuff: foo_bar.Foobar;
-
-export { stuff };
-"
-`;
-
 exports[`support baseUrl and paths in tsconfig.json 1`] = `
 "var __defProp = Object.defineProperty;
 var __getOwnPropDesc = Object.getOwnPropertyDescriptor;