tailscale/version/print.go

// Copyright (c) 2020 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.

package version

import (
	"fmt"
	"runtime"
	"strings"
)

func String() string {
	var ret strings.Builder
	ret.WriteString(Short)
	ret.WriteByte('\n')
	if GitCommit != "" {
		fmt.Fprintf(&ret, "  tailscale commit: %s\n", GitCommit)
	}
	if ExtraGitCommit != "" {
		fmt.Fprintf(&ret, "  other commit: %s\n", ExtraGitCommit)
	}
	fmt.Fprintf(&ret, "  go version: %s\n", runtime.Version())
	return strings.TrimSpace(ret.String())
}
version: use OSS repo's version when building. When building with redo, also include the git commit hash from the proprietary repo, so that we have a precise commit that identifies all build info (including Go toolchain version). Add a top-level build script demonstrating to downstream distros how to burn the right information into builds. Adjust `tailscale version` to print commit hashes when available. Fixes #841. Signed-off-by: David Anderson <danderson@tailscale.com> 4 years ago			`// Copyright (c) 2020 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.`

			`package version`

			`import (`
			`"fmt"`
			`"runtime"`
			`"strings"`
			`)`

			`func String() string {`
			`var ret strings.Builder`
			`ret.WriteString(Short)`
			`ret.WriteByte('\n')`
			`if GitCommit != "" {`
			`fmt.Fprintf(&ret, " tailscale commit: %s\n", GitCommit)`
			`}`
			`if ExtraGitCommit != "" {`
			`fmt.Fprintf(&ret, " other commit: %s\n", ExtraGitCommit)`
			`}`
			`fmt.Fprintf(&ret, " go version: %s\n", runtime.Version())`
			`return strings.TrimSpace(ret.String())`
			`}`