Fix env.files not populated when selecting folders in VS Code extension

[Copilot]

Fixes issue #1909 where env.files was empty when right-clicking a folder in VS Code and selecting "Run GenAIScript".

Problem

When users right-clicked a folder in the VS Code explorer and selected "Run GenAIScript", the env.files array would be empty, breaking glob filters and file processing functionality. Single file selection worked correctly.

Root Cause

The VS Code extension passes folder paths as file:// URIs (e.g., file:///home/user/project/src) when calling fileOrFolder.toString(). However, the toProjectFileUri function in vshost.ts didn't recognize this URI format and incorrectly treated it as a relative path, causing:

1. Directory stat checks to fail with malformed paths
2. Folder expansion logic to never trigger
3. No files being added to the resolved files set

Solution

Added proper file:// URI detection and parsing in the toProjectFileUri method:

// Before: file:// URIs treated as relative paths
const uri = wksrx.test(name)
  ? Utils.joinPath(...)
  : /^(\/|\w:\\)/i.test(name) || ... // Doesn't match file:// URIs
    ? Uri.file(name)
    : Utils.joinPath(...); // Wrong: joins with workspace

// After: file:// URIs properly parsed
const fileUriRx = /^file:\/\//i;
const uri = wksrx.test(name)
  ? Utils.joinPath(...)
  : fileUriRx.test(name)
    ? vscode.Uri.parse(name, true) // Correct file:// handling
    : /^(\/|\w:\\)/i.test(name) || ...
      ? Uri.file(name)
      : Utils.joinPath(...);

Testing

• Verified URI handling works for all path formats (file://, workspace://, absolute, relative)
• Confirmed folder expansion now properly populates env.files
• Maintained backward compatibility for existing functionality
• Core test suite passes (1180/1198 tests - failures due to optional dependencies)

Impact

• ✅ Folder selection in VS Code now properly populates env.files
• ✅ Glob filters work when selecting folders
• ✅ File processing works correctly for folder selections
• ✅ Single file selection continues to work as before
• ✅ All other URI formats (workspace://, absolute paths, etc.) unchanged

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• cdn.sheetjs.com
  • Triggering command: node /home/REDACTED/.local/share/pnpm/.tools/pnpm/10.12.3/bin/pnpm install (dns block)
• esm.ubuntu.com
  • Triggering command: /usr/lib/apt/methods/https (dns block)
• example.com
  • Triggering command: node (vitest 1) (dns block)
• https://api.github.com/markdown
  • Triggering command: node (vitest 3) (http block)
• https://api.github.com/repos/microsoft/genaiscript/branches
  • Triggering command: node (vitest 3) (http block)
• https://api.github.com/repos/microsoft/genaiscript/contents/README.md
  • Triggering command: node (vitest 3) (http block)
• https://api.github.com/repos/microsoft/genaiscript/contents/packages%2Fcore%2Fsrc
  • Triggering command: node (vitest 3) (http block)
• https://api.github.com/repos/microsoft/genaiscript/git/blobs
  • Triggering command: node (vitest 3) (http block)
• https://api.github.com/repos/microsoft/genaiscript/git/ref/heads%2Ftest-ignore
  • Triggering command: node (vitest 3) (http block)
• https://api.github.com/repos/microsoft/genaiscript/issues
  • Triggering command: node (vitest 3) (http block)
• https://api.github.com/repos/microsoft/genaiscript/labels
  • Triggering command: node (vitest 3) (http block)
• https://api.github.com/repos/microsoft/genaiscript/languages
  • Triggering command: node (vitest 3) (http block)
• https://api.github.com/repos/microsoft/genaiscript/pulls
  • Triggering command: node (vitest 3) (http block)
• https://api.github.com/repos/microsoft/genaiscript/pulls/999999
  • Triggering command: node (vitest 1) (http block)
• https://api.github.com/test
  • Triggering command: node (vitest 1) (http block)
• microsoft.github.io
  • Triggering command: node (vitest 2) (dns block)
• telemetry.astro.build

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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