pick leftmost version-shaped token in _parse_tool_version

[HrachShah]

Pull the parsing into a tested _parse_tool_version(stdout) helper:

• Scan the first line for any token shaped like X.Y or X.Y.Z followed by an optional pre-release / dev / local segment, so "3.12.0)" no longer gets returned as "3.12.0" (the trailing ")" is no longer swallowed by \S*).
• When multiple candidates appear, return the leftmost — the tool name always appears before any parenthesized environment info.
• Return "0.0.0" only when no candidate is found, so the existing ">=" check still produces a clear "NOT supported" line.

Added bundled/tool/tests/test_parse_tool_version.py with 13 cases: standard black output, bare version, pre-release, dev with local segment, compiled and Python in parens (two forms), trailing newline, CRLF line endings, empty stdout, whitespace-only stdout, no version token, only a Python banner, and a check that the helper uses the first line only.

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[rchiodo]

🔒 Automated review in progress — @rchiodo is auto-reviewing this PR.

[Copilot]

Pull request overview

This PR refactors the logic that extracts Black’s version from black --version output into a dedicated _parse_tool_version(stdout) helper and adds focused unit tests to prevent regressions across common real-world stdout formats.

Changes:

• Added lsp_server._parse_tool_version(stdout) to pick the leftmost “version-shaped” token from the first stdout line, returning "0.0.0" only when no candidate exists.
• Replaced the prior inline version-parsing logic in _update_workspace_settings_with_version_info with the new helper.
• Added a new pytest module with coverage for standard, pre-release/dev/local, parenthetical Python info, CRLF, empty/whitespace output, and multi-line stdout cases.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
bundled/tool/lsp_server.py	Introduces _parse_tool_version and wires it into workspace version detection; also includes newly added module-level tool configuration/constants (currently problematic).
bundled/tool/tests/test_parse_tool_version.py	Adds unit tests covering many black --version stdout variants to validate version parsing behavior.

[rchiodo]

The "leftmost version-shaped token wins" heuristic only fails safe for black by coincidence: a leading Python 3.x banner is always < 22.3.0 (black's CalVer), so it correctly lands on "NOT supported". Since this file is the shared vscode-python-tools template and the helper is generically named _parse_tool_version, copying it to a tool whose real version is in the 2.x/3.x range (e.g. isort/autopep8) would mistake a leading Python banner for a supported version. Consider anchoring selection on TOOL_MODULE, or at least add a comment noting the leftmost rule is only safe here because black's version numbers exceed CPython's.

[rchiodo]

bundled/ is the shipped VSIX payload. Please confirm .vscodeignore excludes bundled/**/tests/** (or relocate these tests to the conventional src/test/python_tests/ location) so test code isn't shipped in the extension.

[rchiodo]

The PR headline is that a trailing ) (e.g. 3.12.0)) is no longer swallowed, but in every test the returned leftmost token is followed by whitespace, so the )-stripping only ever affects the non-returned second candidate. Add a case that pins the headline behavior on the returned token, e.g. assert _parse_tool_version("black, 22.3.0)") == "22.3.0" (and ideally the no-space "black,22.3.0)" form).

[rchiodo]

The core change is solid and nicely tested. A few small, non-blocking suggestions below (pin the trailing-) headline behavior in a test, confirm the tests aren't shipped in the VSIX, and note why the leftmost-token heuristic is safe for black specifically). Approving.

[rchiodo]

Approved via Review Center.