Datamitsu Toolkit

Format files with your project's datamitsu config. The extension is a thin client around datamitsu lsp — a formatting-only language server — so "Format Document" and format-on-save run the exact same formatters as datamitsu fix on the command line, driven by one config.

It does not bundle any formatters or reimplement any formatting logic: it starts datamitsu lsp, registers it as a document formatter, and shows long-running work (tool downloads, installs) in the status bar by reading datamitsu's JSON-L event stream.

Requirements

A datamitsu binary. By default the extension uses one found on your PATH; if there is none it downloads the version pinned to the extension build (verified by SHA-256). The extension activates only in a workspace that has a datamitsu.config.{js,mjs,ts}.

Usage

Both triggers run the same thing — your project's datamitsu fix on the real file:

• Format Document (Shift+Alt+F), or set datamitsu as the default formatter.

• On save — enable format-on-save and pick datamitsu as the formatter:

  {
    "editor.formatOnSave": true,
    "[go]": { "editor.defaultFormatter": "datamitsu.datamitsu-toolkit" },
    "[typescript]": { "editor.defaultFormatter": "datamitsu.datamitsu-toolkit" },
  }
  

Because datamitsu's fix tools edit files in place, formatting runs on the file on disk and therefore also saves it. The edits are computed as the diff between your buffer and the fixed result, so the editor stays in sync.

Settings

Commands

• datamitsu: Restart Language Server
• datamitsu: Show Output Channel

How it works

datamitsu lsp speaks LSP on stdout and emits a typed JSON-L status stream on stderr. The extension owns the child process: it wires stdout/stdin to the language client and reads stderr for the status bar. stdout therefore carries only LSP traffic. See the datamitsu repo for the language-server and logging design.