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シーエー・アドバンスAdvent Calendar 2021

Day 3

TypeScriptで相対パスのモジュールをimportしたかった

Last updated at Posted at 2021-12-02

相対パスでモジュールimportしたかったので、ttypescript@zerollup/ts-transform-paths を利用していたけど、typescriptのアップデートで壊れちゃった。

../src/lib/paresArgvと書かなくても、こんなかんじのができてた。

import { parseArgv } from 'lib/parseArgv'

調べてみたら、同じ目にあってる人もいた。

ts-patch

ts-patchを導入すれば、ttypescriptと同等のことをやってくれるっぽい。

対応方法

雑に直した差分を貼っとく
tsconfig.jsonにbaseUrl, paths, pluginsへの設定がない人は入れときましょう。

diff --git a/package.json b/package.json
index dcf37b8..276f3df 100644
--- a/package.json
+++ b/package.json
@@ -3,8 +3,9 @@
   "scripts": {
+    "prepare": "ts-patch install -s",
-    "build": "ttsc -P ./tsconfig.json",
+    "build": "tsc -P ./tsconfig.json",
@@ -25,7 +26,6 @@
-    "@zerollup/ts-transform-paths": "^1.7.18",
+    "ts-patch": "^2.0.1",
-    "ttypescript": "^1.5.12",
+    "typescript-transform-paths": "^3.3.1"

diff --git a/tsconfig.json b/tsconfig.json
index 4a4cf58..a12c084 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -7,7 +7,7 @@
     "outDir": "./dist",
     "rootDir": "./src",
     "strict": true,
-    "plugins": [{ "transform": "@zerollup/ts-transform-paths" }],
+    "plugins": [{ "transform": "typescript-transform-paths" }],
     "baseUrl": "src",
     "paths": {
       "*": ["*"]
     },

tsonfig.json

つかってる設定ファイルもペタリ

tsconfig.json
{
  "compilerOptions": {
    "target": "ES2021",
    "module": "CommonJS",
    "lib": ["es2021"],
    "sourceMap": true,
    "outDir": "./dist",
    "rootDir": "./src",
    "strict": true,
    "plugins": [{ "transform": "typescript-transform-paths" }],
    "moduleResolution": "node",
    "baseUrl": "src",
    "paths": {
      "*": ["*"]
    },
    "esModuleInterop": true,
    "skipLibCheck": true,
    "forceConsistentCasingInFileNames": true,
    "resolveJsonModule": true,
    "noUnusedLocals": false,
    "noUnusedParameters": true,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,
    "noUncheckedIndexedAccess": true
  },
  "include": ["src/**/*"],
  "exclude": ["dist", "node_modules"],
  "compileOnSave": false
}

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