演示仓库

https://github.com/sodatea/ts-exports-rewrite

你报告的问题是以下哪一个？

更复杂一些的问题，我将在后面详细解释

用代码示例展示上述缺陷。

在复现仓库中， parse.ts 文件 间接依赖于lru-cache 模块的类型，通过导入 cache.ts 文件：

import { createCache } from './cache'
export const parseCache = createCache<{}>()

编译后，在 parse.d.ts 中，我们通常期望得到一个 import('lru-cache').LRUCache 表达式。
然而，实际上变成了 import("lru-cache/min").LRUCache。
另一方面，编译后的 cache.d.ts 文件仍然从 lru-cache 导入，而不是 lru-cache/min。
这似乎与 lru-cache@10.0.1 的 exports 字段有关：https://unpkg.com/browse/lru-cache@10.0.1/package.json#L34
它包含两个条目， ./min 和 .,都指向同一个文件。TypeScript 选择了第一个条目。
如果我修改 exports 字段，使 . 在 ./min 之前出现，那么编译声明文件将按预期使用 import("lru-cache")。
虽然这不是一个非常严重的错误，有简单的解决方法，但这是相当意外的。
因为 lru-cache/min 仅在 exports 字段中可用，因此此编译结果破坏了与旧构建工具的兼容性。而且调试起来相当困难，因为从未有人提到 exports 字段中的键顺序会有所不同。

运行 tsc --showConfig 并粘贴输出结果在这里

{
    "compilerOptions": {
        "outDir": "./temp",
        "target": "esnext",
        "module": "esnext",
        "moduleResolution": "bundler",
        "esModuleInterop": true,
        "declaration": true,
        "emitDeclarationOnly": true,
        "types": []
    },
    "files": [
        "./cache.ts",
        "./parse.ts"
    ],
    "include": [
        "cache.ts",
        "parse.ts"
    ],
    "exclude": [
        "temp"
    ]
}

运行 tsc --traceResolution 并粘贴输出结果在这里

======== Resolving module 'lru-cache' from '/Users/haoqun/Reproductions/ts-exports-rewrite/cache.ts'. ========
Explicitly specified module resolution kind: 'Bundler'.
Resolving in CJS mode with conditions 'import', 'types'.
Found 'package.json' at '/Users/haoqun/Reproductions/ts-exports-rewrite/package.json'.
Loading module 'lru-cache' from 'node_modules' folder, target file types: TypeScript, JavaScript, Declaration, JSON.
Searching all ancestor node_modules directories for preferred extensions: TypeScript, Declaration.
Found 'package.json' at '/Users/haoqun/Reproductions/ts-exports-rewrite/node_modules/lru-cache/package.json'.
Entering conditional exports.
Matched 'exports' condition 'import'.
Entering conditional exports.
Matched 'exports' condition 'types'.
Using 'exports' subpath '.' with target './dist/mjs/index.d.ts'.
File '/Users/haoqun/Reproductions/ts-exports-rewrite/node_modules/lru-cache/dist/mjs/index.d.ts' exists - use it as a name resolution result.
Resolved under condition 'types'.
Exiting conditional exports.
Resolved under condition 'import'.
Exiting conditional exports.
Resolving real path for '/Users/haoqun/Reproductions/ts-exports-rewrite/node_modules/lru-cache/dist/mjs/index.d.ts', result '/Users/haoqun/Reproductions/ts-exports-rewrite/node_modules/lru-cache/dist/mjs/index.d.ts'.
======== Module name 'lru-cache' was successfully resolved to '/Users/haoqun/Reproductions/ts-exports-rewrite/node_modules/lru-cache/dist/mjs/index.d.ts' with Package ID 'lru-cache/dist/mjs/index.d.ts@10.0.1'. ========
======== Resolving module './cache' from '/Users/haoqun/Reproductions/ts-exports-rewrite/parse.ts'. ========
Explicitly specified module resolution kind: 'Bundler'.
Resolving in CJS mode with conditions 'import', 'types'.
Loading module as file / folder, candidate module location '/Users/haoqun/Reproductions/ts-exports-rewrite/cache', target file types: TypeScript, JavaScript, Declaration, JSON.
File '/Users/haoqun/Reproductions/ts-exports-rewrite/cache.ts' exists - use it as a name resolution result.
======== Module name './cache' was successfully resolved to '/Users/haoqun/Reproductions/ts-exports-rewrite/cache.ts'. ========

如果存在，粘贴导入模块的 package.json

{
  "name": "ts-exports-rewrite",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "build": "tsc"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "lru-cache": "10.0.1",
    "typescript": "^5.2.2"
  }
}

如果存在，粘贴目标模块的 package.json

{
  "name": "lru-cache",
  "description": "A cache object that deletes the least-recently-used items.",
  "version": "10.0.1",
  "author": "Isaac Z. Schlueter <i@izs.me>",
  "keywords": [
    "mru",
    "lru",
    "cache"
  ],
  "sideEffects": false,
  "scripts": {
    "build": "npm run prepare",
    "preprepare": "rm -rf dist",
    "prepare": "tsc -p tsconfig.json && tsc -p tsconfig-esm.json",
    "postprepare": "bash fixup.sh",
    "pretest": "npm run prepare",
    "presnap": "npm run prepare",
    "test": "c8 tap",
    "snap": "c8 tap",
    "preversion": "npm test",
    "postversion": "npm publish",
    "prepublishOnly": "git push origin --follow-tags",
    "format": "prettier --write .",
    "typedoc": "typedoc --tsconfig tsconfig-esm.json ./src/*.ts",
    "benchmark-results-typedoc": "bash scripts/benchmark-results-typedoc.sh",
    "prebenchmark": "npm run prepare",
    "benchmark": "make -C benchmark",
    "preprofile": "npm run prepare",
    "profile": "make -C benchmark profile"
  },
  "main": "./dist/cjs/index.js",
  "module": "./dist/mjs/index.js",
  "exports": {
    "./min": {
      "import": {
        "types": "./dist/mjs/index.d.ts",
        "default": "./dist/mjs/index.min.js"
      },
      "require": {
        "types": "./dist/cjs/index.d.ts",
        "default": "./dist/cjs/index.min.js"
      }
    },
    ".": {
      "import": {
        "types": "./dist/mjs/index.d.ts",
        "default": "./dist/mjs/index.js"
      },
      "require": {
        "types": "./dist/cjs/index.d.ts",
        "default": "./dist/cjs/index.js"
      }
    }
  },
  "repository": "git://github.com/isaacs/node-lru-cache.git",
  "devDependencies": {
    "@size-limit/preset-small-lib": "^7.0.8",
    "@types/node": "^20.2.5",
    "@types/tap": "^15.0.6",
    "benchmark": "^2.1.4",
    "c8": "^7.11.2",
    "clock-mock": "^1.0.6",
    "esbuild": "^0.17.11",
    "eslint-config-prettier": "^8.5.0",
    "marked": "^4.2.12",
    "mkdirp": "^2.1.5",
    "prettier": "^2.6.2",
    "size-limit": "^7.0.8",
    "tap": "^16.3.4",
    "ts-node": "^10.9.1",
    "tslib": "^2.4.0",
    "typedoc": "^0.24.6",
    "typescript": "^5.0.4"
  },
  "license": "ISC",
  "files": [
    "dist"
  ],
  "engines": {
    "node": "14 || >=16.14"
  },
  "prettier": {
    "semi": false,
    "printWidth": 70,
    "tabWidth": 2,
    "useTabs": false,
    "singleQuote": true,
    "jsxSingleQuote": false,
    "bracketSameLine": true,
    "arrowParens": "avoid",
    "endOfLine": "lf"
  },
  "tap": {
    "coverage": false,
    "node-arg": [
      "--expose-gc",
      "-r",
      "ts-node/register"
    ],
    "ts": false
  },
  "size-limit": [
    {
      "path": "./dist/mjs/index.js"
    }
  ]
}

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