Go Tools Init

A small VSCode extension that wires up your Go 1.24+ tool directives for use inside VSCode.

Status: stop-gap. This exists to bridge the gap until the official Go extension supports go tool natively (golang/vscode-go#3799). When that lands, run Clean Generated Integration and uninstall — nothing is locked in.

Requirements & limitations

• Go 1.24+ (for tool directives) and the official Go extension (golang.go).
• macOS / Linux (the integration uses bash shims). This includes Windows via WSL or Dev Containers, where the workspace is Linux. Native Windows is not supported yet (#1).
• The Go extension only honours go.alternateTools in a trusted workspace — accept the Workspace Trust prompt. See How the Go extension picks up your tools.

Go 1.24 lets you track developer tools in go.mod:

tool (
    github.com/golangci/golangci-lint/cmd/golangci-lint
    golang.org/x/tools/cmd/goimports
)

…and run them with go tool <name>. This extension scaffolds the glue so the Go extension and your tasks can use those tools without a global install.

Usage

1. Open your workspace (a single Go module, or a monorepo with many go.mod files).
2. When tool directives are found, the extension prompts you to set up the integration. You can also run Init Go Project from the Command Palette (goToolsInit.init) at any time.
3. To undo it, run Clean Generated Integration (goToolsInit.clean) — it previews and removes only what this extension created (the .tools/ shims, its go.alternateTools entries, its go.lintTool value, and its go tool tasks), leaving your own settings and tasks untouched. Handy once you no longer need the stop-gap (see Relationship to upstream).

It globs every go.mod in the workspace (skipping vendor/ and testdata/), parses each module's tool directives independently, derives the binary name from the last segment of each import path, and generates:

• .tools/<binary> (workspace root) — one executable bash shim per unique tool name:

  #!/usr/bin/env bash
  exec go tool <binary> "$@"

  The shim has no cd, so go tool resolves to the calling module's pinned tool via the working directory. A single root shim therefore serves every module — there is no per-module copy.
• .vscode/settings.json (workspace root) — go.alternateTools mapping each binary to its root shim, e.g. ${workspaceFolder}/.tools/golangci-lint. go.alternateTools is a single global map (one entry per tool name), so a tool shared by several modules has exactly one entry. go.lintTool may also be set (see below). Existing settings are merged, not overwritten.
• .vscode/tasks.json (workspace root) — one task per tool, with sensible default args. Labels are prefixed by module directory to avoid collisions, e.g. services/auth: golangci-lint run ./..., services/api: goimports -l .. Each task runs in its module's directory. Existing tasks are merged.

How the Go extension picks up your tools

go.alternateTools only changes which binary a tool resolves to — it does not, by itself, make the Go extension run that tool. Two things matter:

• Workspace Trust. The Go extension only reads go.alternateTools from .vscode/settings.json in a trusted workspace. Accept VS Code's Workspace Trust prompt (or "Trust" the folder) — in Restricted Mode the mappings, and the Go extension itself, are ignored.
• Linting. go.lintTool is unset by default, so golangci-lint never runs as a linter on its own. This extension sets go.lintTool to golangci-lint (or golangci-lint-v2 for /v2/ modules) only when every configured module declares it — and only if you haven't already chosen a linter. The pinned binary is then used via the shim.
• Per-module is your choice. go.lintTool is workspace-global: it can only name one linter for the whole workspace. Because whether a module declares golangci-lint is a deliberate per-module decision, a mixed workspace (some modules with it, some without) is left alone — go.lintTool is not set, so no module gets a linter forced on it. Each module's tasks.json entries still reflect exactly what that module declares. Set go.lintTool yourself if you want one linter everywhere.
• Formatting. goimports / gofumpt are mapped in go.alternateTools, but the Go extension formats via gopls by default. To route formatting through the pinned binary, set go.formatTool to goimports / gofumpt yourself (gofumpt is often better enabled via gopls: "formatting.gofumpt": true).
• Tasks in tasks.json run go tool <name> directly and work regardless of the above.

Behaviour

• Monorepo aware — when more than one module has unconfigured tool directives, you get a multi-select list (shown as paths relative to the workspace root) to choose which modules to configure.
• Auto-prompt — on activation, if unconfigured modules with tool directives exist, you're asked whether to set up the integration.
  • Single module: "Go tool directives detected in <module>. Set up VSCode integration?"
  • Multiple: "Go tool directives detected in N modules…", then the picker.
• Preview before writing — once you confirm and choose modules, a modal lists every shim, setting, and task that will be created or changed; nothing is written until you click Apply.
• Don't Ask Again — sets "goToolsInit.ignore": true in the workspace-root .vscode/settings.json, suppressing the auto-prompt for this workspace. Never for Any Workspace suppresses it on this machine entirely (stored in the extension's global state). The Init Go Project command always bypasses both flags, and (with multiple modules) lists every module, marking configured ones (already configured).
• Idempotent — safe to re-run when you add new tools; it only adds what is missing and refreshes the shims.
• No tool directives anywhere → tells you, and suggests go get -tool <import-path>.
• On success, shows a notification listing what was generated.

Relationship to upstream

This extension is a stop-gap. The Go team is tracking native go tool support in the official Go extension — see golang/vscode-go#3799. If/when that lands, the go.alternateTools half of this extension becomes unnecessary; the generated tasks.json entries (plain go tool <name> runners) are likely to stay useful regardless. Track the upstream issue before investing heavily here.

Notes

• Shims are marked executable on Unix-like systems (best effort; chmod is skipped on Windows).
• JSON files are read tolerantly (comments and trailing commas are accepted on read), but are rewritten as plain JSON, so hand-written comments in settings.json / tasks.json are not preserved.

Development

npm install
npm run compile   # or: npm run watch

Press F5 in VSCode to launch an Extension Development Host.