fix: rollup-plugin-typescript2 objectHashIgnoreUnknownHack warning (fix #305) (#339)

rollup-plugin-typescript2 < v0.26 needs the `objectHashIgnoreUnknownHack`
option to be enabled to correctly handle async plugins, but it's no
longer needed (and causes a warning) if the user has a more recent
version installed.

this PR detects the version of the plugin, if installed, and enables/disables the option accordingly.

Author: chocolateboy

package.json

@@ -98,6 +98,7 @@
     "resolve-from": "^5.0.0",
     "rollup-plugin-typescript2": "^0.19.2",
     "semantic-release": "^15.13.3",
+    "semver": "^7.3.2",
     "slash": "^2.0.0",
     "string-width": "^3.0.0",
     "stringify-author": "^0.1.3",

src/index.ts

@@ -177,6 +177,23 @@ export class Bundler {
       rollupFormat === 'iife' ||
       config.bundleNodeModules
 
+    // rollup-plugin-typescript2 < v0.26 needs the `objectHashIgnoreUnknownHack`
+    // option to be enabled to correctly handle async plugins, but it's no
+    // longer needed (and causes a warning) if the user has a more recent
+    // version installed. [1] if the plugin is installed, detect the version
+    // and enable/disable the option accordingly.
+    //
+    // [1] https://github.com/egoist/bili/issues/305
+    const getObjectHashIgnoreUnknownHack = (): boolean => {
+      try {
+        const { version } = this.localRequire('rollup-plugin-typescript2/package.json')
+        const semver = require('semver')
+        return semver.lt(version, '0.26.0')
+      } catch (e) {
+        return true
+      }
+    }
+
     const pluginsOptions: { [key: string]: any } = {
       progress:
         config.plugins.progress !== false &&
@@ -227,7 +244,7 @@ export class Bundler {
         (source.hasTs || config.plugins.typescript2) &&
         merge(
           {
-            objectHashIgnoreUnknownHack: true,
+            objectHashIgnoreUnknownHack: getObjectHashIgnoreUnknownHack(),
             tsconfigOverride: {
               compilerOptions: {
                 module: 'esnext'

yarn.lock

@@ -8437,6 +8437,11 @@ semver@7.0.0:
   resolved "https://registry.yarnpkg.com/semver/-/semver-7.0.0.tgz#5f3ca35761e47e05b206c6daff2cf814f0316b8e"
   integrity sha512-+GB6zVA9LWh6zovYQLALHwv5rb2PHGlJi3lfiqIHxR0uuwCgefcOJc59v9fv1w8GbStwxuuqqAjI9NMAOOgq1A==
 
+semver@^7.3.2:
+  version "7.3.2"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-7.3.2.tgz#604962b052b81ed0786aae84389ffba70ffd3938"
+  integrity sha512-OrOb32TeeambH6UrhtShmF7CRDqhL6/5XpPNp2DuRH6+9QLw/orhp72j87v8Qa1ScDkvrrBNpZcDejAirJmfXQ==
+
 semver@~5.3.0:
   version "5.3.0"
   resolved "https://registry.npmjs.org/semver/-/semver-5.3.0.tgz#9b2ce5d3de02d17c6012ad326aa6b4d0cf54f94f"