fix(core): resolve symbolic links

[nabetti1720]

Issue # (if available)

Fixed #875

Description of changes

Fixed an issue where paths could not be resolved correctly in require/import when the base path contained a symbolic link.

% pwd
/Users/shinya/Workspaces/llrt-test/symlink

% ls -lFa .    
total 16
drwxr-xr-x   5 shinya  staff   160  3  8 22:36 ./
drwxr-xr-x  90 shinya  staff  2880  3  8 12:27 ../
-rw-r--r--   1 shinya  staff    72  3  8 12:28 bar.js
drwxr-xr-x   7 shinya  staff   224  3  8 22:37 bin/
-rw-r--r--   1 shinya  staff    42  3  8 22:29 foo.js

% ls -lFa bin
total 16
drwxr-xr-x  7 shinya  staff  224  3  8 22:37 ./
drwxr-xr-x  5 shinya  staff  160  3  8 22:36 ../
lrwxr-xr-x  1 shinya  staff   54  3  8 22:37 absolute@ -> /Users/shinya/Workspaces/llrt-test/symlink/bin/hoge.js
lrwxr-xr-x  1 shinya  staff    9  3  8 12:29 foo@ -> ../foo.js
-rw-r--r--  1 shinya  staff   75  3  8 22:26 fuga.js
lrwxr-xr-x  1 shinya  staff    9  3  8 22:31 hoge@ -> ./hoge.js
-rw-r--r--  1 shinya  staff   45  3  8 22:30 hoge.js

File contents

% cat bin/fuga.js
function fuga() {
    console.log('fuga.js');
}
module.exports = {
    fuga
};

% cat bin/hoge.js
const { fuga } = require("./fuga");

fuga();

cat bar.js
function bar() {
    console.log('bar.js');
}
module.exports = {
    bar
};

% cat foo.js
const { bar } = require("./bar");

bar();

Result:

% llrt bin/foo
bar.js

% llrt bin/hoge
fuga.js

% llrt bin/absolute 
fuga.js

NOTE:
I couldn't create a reproducible environment in the fixtures directory because it contains symbolic links, so I couldn't write test code.

Checklist

• Created unit tests in tests/unit and/or in Rust for my feature if needed
• Ran make fix to format JS and apply Clippy auto fixes
• Made sure my code didn't add any additional warnings: make check
• Added relevant type info in types/ directory
• Updated documentation if needed (API.md/README.md/Other)

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[richarddavison]

LGTM! Thanks!