Aliases (Paths) Not Being Replaced

[adrians5j]

Describe the bug
Just started playing with SWC and I I'd just like to say this is an amazing tool. Just amazed how it's fast and how much work has been put into it. 🙏🏻

So, in my code, I have ~/........ import statements, but, once the SWC has done its magic, these are replaced with correct paths - only when I set "type": "commonjs" in my .swcrc file. Otherwise, they just stay the same.

Input code

So, this is the resulting code. As we can see, the import paths haven't changed (~ is still here).

But, if I were to use the commonjs module type, then I'd see the path built correctly:

Config

commonjs works (paths are changed correctly):

{
  "jsc": {
    "parser": {
      "syntax": "typescript"
    },
    "target": "es2020",
    "paths": {
      "~/*": ["./src/*"]
    },
    "baseUrl": "."
  },
  "module": {
    "type": "commonjs"
  }
}

This one does not work:

{
  "jsc": {
    "parser": {
      "syntax": "typescript"
    },
    "target": "es2020",
    "paths": {
      "~/*": ["./src/*"]
    },
    "baseUrl": "."
  }
}

Expected behavior
The paths to be correctly replaced.

Version
The version of @swc/core: 1.2.102

Additional context
Checked a couple of issues reported by other users (#2126, #2050), those didn't provide any clues unfortunately.

[ckken]

amd is no work too

[eturino]

es6 also doesn't work. This is mentioned in #702 (comment)

[adrians5j]

Hey everybody, I saw a PR that was dealing with this was merged, so I went ahead and tried the latest 1.2.108 SWC version.

Unfortunately, I have to report that, at least on my end, the paths are still not being transformed the way they should be.

The steps I did were the following...

1. Created a brand new project and installed SWC.
2. Created the following files:

src
├── index.ts
└── utils
    └── index.ts

The src/index.ts looks like the following:

import test from "~/utils";

test();

3. I created the same .swcrc config I used above:

{
  "jsc": {
    "parser": {
      "syntax": "typescript"
    },
    "target": "es2020",
    "paths": {
      "~/*": ["./src/*"]
    },
    "baseUrl": "."
  }
}

4. Ran swc src -d dist --source-maps --copy-files --extensions '.ts'

Results?

Well, ultimately, the results were the same as reported initially. 😔

The compiled code was:

import test from "~/utils";
test();

//# sourceMappingURL=index.js.map

So, "~" wasn't replaced.

And, as stated above, once I switched to commonjs via ...

"module": {
    "type": "commonjs"
}

... the path transformation was successful:

"use strict";
var _utils = _interopRequireDefault(require("./utils"));
function _interopRequireDefault(obj) {
    return obj && obj.__esModule ? obj : {
        default: obj
    };
}
(0, _utils).default();

//# sourceMappingURL=index.js.map

Hope I'm not missing something. If so, I'm sorry in advance for the trouble. 🙂

[kdy1]

I think another issue is better.

[swc-bot]

This closed issue has been automatically locked because it had no new activity for a month. If you are running into a similar issue, please create a new issue with the steps to reproduce. Thank you.