Brad Fitzpatrick 9bb7ca6116 cmd/vet/lowerell, drive/driveimpl: forbid variables named "l" or "I"
Add a new vet checker that rejects variables, parameters, named
return values, receivers, range/type-switch bindings, type
parameters, struct fields, and constants named "l" (lowercase ell)
or "I" (uppercase i). Both are hard to distinguish from the digit
"1" and from each other in too many fonts.

Rename the two pre-existing struct fields named "l" (both of type
net.Listener) in drive/driveimpl/drive_test.go to "ln", matching the
convention used elsewhere for net.Listener locals.

Rename the test-fixture struct fields "I" (single int label) to
"Int" in metrics/multilabelmap_test.go and util/deephash/deephash_test.go,
preserving the "first letters of types" convention used alongside
neighboring fields like I8/I16/U/U8.

Also teach pkgdoc_test.go to skip testdata/ directories, which
the go tool ignores; they are not real packages.

Fixes #19631

Change-Id: I71ad2fa990705f7a070406ebcdb8cefa7487d849
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2026-05-04 14:03:28 -07:00
2026-05-04 10:34:27 -07:00
2026-05-01 14:01:10 -07:00
2026-03-27 08:41:33 +00:00
2026-01-27 16:15:17 -08:00

Tailscale

https://tailscale.com

Private WireGuard® networks made easy

Overview

This repository contains the majority of Tailscale's open source code. Notably, it includes the tailscaled daemon and the tailscale CLI tool. The tailscaled daemon runs on Linux, Windows, macOS, and to varying degrees on FreeBSD and OpenBSD. The Tailscale iOS and Android apps use this repo's code, but this repo doesn't contain the mobile GUI code.

Other Tailscale repos of note:

For background on which parts of Tailscale are open source and why, see https://tailscale.com/opensource/.

Using

We serve packages for a variety of distros and platforms at https://pkgs.tailscale.com.

Other clients

The macOS, iOS, and Windows clients use the code in this repository but additionally include small GUI wrappers. The GUI wrappers on non-open source platforms are themselves not open source.

Building

We always require the latest Go release, currently Go 1.26. (While we build releases with our Go fork, its use is not required.)

go install tailscale.com/cmd/tailscale{,d}

If you're packaging Tailscale for distribution, use build_dist.sh instead, to burn commit IDs and version info into the binaries:

./build_dist.sh tailscale.com/cmd/tailscale
./build_dist.sh tailscale.com/cmd/tailscaled

If your distro has conventions that preclude the use of build_dist.sh, please do the equivalent of what it does in your distro's way, so that bug reports contain useful version information.

Bugs

Please file any issues about this code or the hosted service on the issue tracker.

Contributing

PRs welcome! But please file bugs. Commit messages should reference bugs.

We require Developer Certificate of Origin Signed-off-by lines in commits.

See commit-messages.md (or skim git log) for our commit message style.

About Us

Tailscale is primarily developed by the people at https://github.com/orgs/tailscale/people. For other contributors, see:

WireGuard is a registered trademark of Jason A. Donenfeld.

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