Try all path, consider useBundled import strategy

[dhruvmanila]

Summary

This PR does two things:

1. As ruff.path is an array, we need to check each entry and only proceed with the first valid path (ruff-lsp reference)
2. Consider useBundled import strategy

fixes: #507

Test Plan

1

One valid path:

{
  "ruff.nativeServer": true,
  "ruff.importStrategy": "useBundled",
  "ruff.path": ["/Users/dhruv/work/astral/ruff/target/debug/ruff"]
}

Logs:

2024-07-02 15:43:01.550 [info] Using 'path' setting: /Users/dhruv/work/astral/ruff/target/debug/ruff
2024-07-02 15:43:01.550 [info] Server run command: /Users/dhruv/work/astral/ruff/target/debug/ruff server --preview
2024-07-02 15:43:01.550 [info] Server: Start requested.

2

Multiple valid paths:

{
  "ruff.nativeServer": true,
  "ruff.importStrategy": "useBundled",
  "ruff.path": [
    "/Users/dhruv/.local/bin/ruff",
    "/Users/dhruv/work/astral/ruff/target/debug/ruff"
  ]
}

Logs:

2024-07-02 15:44:12.698 [info] Using 'path' setting: /Users/dhruv/.local/bin/ruff
2024-07-02 15:44:12.698 [info] Server run command: /Users/dhruv/.local/bin/ruff server --preview
2024-07-02 15:44:12.698 [info] Server: Start requested.

3

First is an invalid path, second is a valid path:

{
  "ruff.nativeServer": true,
  "ruff.importStrategy": "useBundled",
  "ruff.path": [
    "/Users/dhruv/random/ruff",
    "/Users/dhruv/work/astral/ruff/target/debug/ruff"
  ]
}

Logs:

2024-07-02 15:44:47.816 [info] Using 'path' setting: /Users/dhruv/work/astral/ruff/target/debug/ruff
2024-07-02 15:44:47.816 [info] Server run command: /Users/dhruv/work/astral/ruff/target/debug/ruff server --preview
2024-07-02 15:44:47.816 [info] Server: Start requested.

4

All invalid paths, should fallback to using bundled executable:

{
  "ruff.nativeServer": true,
  "ruff.importStrategy": "useBundled",
  "ruff.path": [
    "/Users/dhruv/random/ruff",
    "/Users/dhruv/another/random/ruff"
  ]
}

Logs:

2024-07-02 15:59:44.215 [info] Could not find executable in 'path': /Users/dhruv/random/ruff, /Users/dhruv/another/random/ruff
2024-07-02 15:59:44.215 [info] Using bundled executable: /Users/dhruv/work/astral/ruff-vscode/bundled/libs/bin/ruff
2024-07-02 15:59:44.215 [info] Server run command: /Users/dhruv/work/astral/ruff-vscode/bundled/libs/bin/ruff server --preview
2024-07-02 15:59:44.215 [info] Server: Start requested.

5

No paths given, should fallback to using bundled executable:

{
  "ruff.nativeServer": true,
  "ruff.importStrategy": "useBundled",
  "ruff.path": []
}

Logs:

2024-07-02 15:45:34.349 [info] Using bundled executable: /Users/dhruv/work/astral/ruff-vscode/bundled/libs/bin/ruff
2024-07-02 15:45:34.349 [info] Server run command: /Users/dhruv/work/astral/ruff-vscode/bundled/libs/bin/ruff server --preview
2024-07-02 15:45:34.349 [info] Server: Start requested.

6

No paths, not using bundled executable, let the Python script decide on which executable to use:

{
  "ruff.nativeServer": true,
  "ruff.path": []
}

Logs:

2024-07-02 15:50:13.326 [info] Server run command: /Users/dhruv/work/astral/ruff-vscode/.venv/bin/python /Users/dhruv/work/astral/ruff-vscode/bundled/tool/ruff_server.py server --preview
2024-07-02 15:50:13.326 [info] Server: Start requested.