tailscale/cmd/printdep/printdep.go

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// Copyright (c) 2021 Tailscale Inc & AUTHORS All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// The printdep command is a build system tool for printing out information
// about dependencies.
package main
import (
"flag"
"fmt"
"log"
"runtime"
"strings"
ts "tailscale.com"
)
var (
goToolchain = flag.Bool("go", false, "print the supported Go toolchain git hash (a github.com/tailscale/go commit)")
goToolchainURL = flag.Bool("go-url", false, "print the URL to the tarball of the Tailscale Go toolchain")
)
func main() {
flag.Parse()
if *goToolchain {
fmt.Println(strings.TrimSpace(ts.GoToolchainRev))
}
if *goToolchainURL {
var suffix string
switch runtime.GOARCH {
case "amd64":
// None
case "arm64":
suffix = "-" + runtime.GOARCH
default:
log.Fatalf("unsupported GOARCH %q", runtime.GOARCH)
}
switch runtime.GOOS {
case "linux", "darwin":
default:
log.Fatalf("unsupported GOOS %q", runtime.GOOS)
}
fmt.Printf("https://github.com/tailscale/go/releases/download/build-%s/%s%s.tar.gz\n", strings.TrimSpace(ts.GoToolchainRev), runtime.GOOS, suffix)
}
}