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tailscale/version/version.go

168 lines
4.9 KiB
Go

// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
// Package version provides the version that the binary was built at.
package version
import (
"os"
"path/filepath"
"runtime"
"runtime/debug"
"strconv"
"strings"
tailscaleroot "tailscale.com"
)
var (
// Long is a full version number for this build, of the form
// "x.y.z-commithash" for builds stamped in the usual way (see build_dist.sh
// in the root) or, for binaries built by hand with the go tool, it's of the
// form "1.23.0-dev20220316-t29837428937{,-dirty}" where "1.23.0" comes from
// ../VERSION.txt and the part after dev is YYYYMMDD of the commit time, and
// the part after -t is the commit hash. The dirty suffix is whether there
// are uncommitted changes.
Long string
// Short is a short version number for this build, of the form
// "x.y.z" for builds stamped in the usual way (see
// build_dist.sh in the root) or, for binaries built by hand with the
// go tool, it's like Long's dev form, but ending at the date part,
// of the form "1.23.0-dev20220316".
Short string
// GitCommit, if non-empty, is the git commit of the
// github.com/tailscale/tailscale repository at which Tailscale was
// built. Its format is the one returned by `git describe --always
// --exclude "*" --dirty --abbrev=200`.
GitCommit string
// GitDirty is whether Go stamped the binary as having dirty version
// control changes in the working directory (debug.ReadBuildInfo
// setting "vcs.modified" was true).
GitDirty bool
// ExtraGitCommit, if non-empty, is the git commit of a "supplemental"
// repository at which Tailscale was built. Its format is the same as
// gitCommit.
//
// ExtraGitCommit is used to track the source revision when the main
// Tailscale repository is integrated into and built from another
// repository (for example, Tailscale's proprietary code, or the
// Android OSS repository). Together, GitCommit and ExtraGitCommit
// exactly describe what repositories and commits were used in a
// build.
ExtraGitCommit = ""
// isUnstable is whether the current build appears to be an unstable, i.e. with
// an odd minor version number.
isUnstable bool
// legacyOS is runtime.GOOS, except on apple devices where it's either "iOS" or
// "macOS" (with that exact case).
//
// This used to be a thing because Go reported both macOS and iOS as "darwin"
// and we needed to tell them apart. But then Go learned GOOS=ios and
// GOOS=darwin as separate things, but we're still stuck with this function
// because of the odd casing we picked, which has ossified into databases.
legacyOS string
// isMobile is whether the current build is for a mobile device.
isMobile bool
// isSandboxedMacOS is whether the current binary is any binary in the mac store
// or standalone sysext mac apps.
isSandboxedMacOS bool
// isMacSysExt is whether the current binary is the mac system extension binary.
isMacSysExt bool
// isWindowsGUI is whether the current binary is the Windows GUI binary.
isWindowsGUI bool
)
func init() {
initVersion()
initUnstable()
initMiscTraits()
}
func initVersion() {
if Long != "" && Short != "" {
// Built in the recommended way, using build_dist.sh.
return
}
// Otherwise, make approximate version info using Go 1.18's built-in git
// stamping.
bi, ok := debug.ReadBuildInfo()
if !ok {
Long = strings.TrimSpace(tailscaleroot.Version) + "-ERR-BuildInfo"
Short = Long
return
}
var dirty string // "-dirty" suffix if dirty
var commitDate string
for _, s := range bi.Settings {
switch s.Key {
case "vcs.revision":
GitCommit = s.Value
case "vcs.time":
if len(s.Value) >= len("yyyy-mm-dd") {
commitDate = s.Value[:len("yyyy-mm-dd")]
commitDate = strings.ReplaceAll(commitDate, "-", "")
}
case "vcs.modified":
if s.Value == "true" {
dirty = "-dirty"
GitDirty = true
}
}
}
commitHashAbbrev := GitCommit
if len(commitHashAbbrev) >= 9 {
commitHashAbbrev = commitHashAbbrev[:9]
}
// Backup path, using Go 1.18's built-in git stamping.
Short = strings.TrimSpace(tailscaleroot.Version) + "-dev" + commitDate
Long = Short + "-t" + commitHashAbbrev + dirty
}
func initUnstable() {
_, rest, ok := strings.Cut(Short, ".")
if !ok {
return
}
minorStr, _, ok := strings.Cut(rest, ".")
if !ok {
return
}
minor, err := strconv.Atoi(minorStr)
if err != nil {
return
}
isUnstable = minor%2 == 1
}
func initMiscTraits() {
exe, _ := os.Executable()
base := filepath.Base(exe)
legacyOS = runtime.GOOS
switch runtime.GOOS {
case "darwin":
legacyOS = "macOS"
isMacSysExt = strings.HasPrefix(base, "io.tailscale.ipn.macsys.network-extension")
isSandboxedMacOS = isMacSysExt || strings.HasSuffix(exe, "/Contents/MacOS/Tailscale") || strings.HasSuffix(exe, "/Contents/MacOS/IPNExtension")
case "ios":
legacyOS = "iOS"
isMobile = true
case "android":
isMobile = true
case "windows":
isWindowsGUI = strings.EqualFold(base, "tailscale-ipn.exe") || strings.EqualFold(base, "tailscale-ipn")
}
}