128 lines
3.5 KiB
Go
128 lines
3.5 KiB
Go
// Copyright (C) 2019 The Syncthing Authors.
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this file,
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// You can obtain one at https://mozilla.org/MPL/2.0/.
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package build
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import (
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"fmt"
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"log"
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"os"
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"regexp"
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"runtime"
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"sort"
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"strconv"
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"strings"
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"time"
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)
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const Codename = "Gold Grasshopper"
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var (
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// Injected by build script
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Version = "unknown-dev"
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Host = "unknown"
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User = "unknown"
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Stamp = "0"
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Tags = ""
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// Set by init()
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Date time.Time
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IsRelease bool
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IsCandidate bool
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IsBeta bool
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LongVersion string
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Extra string
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allowedVersionExp = regexp.MustCompile(`^v\d+\.\d+\.\d+(-[a-z0-9]+)*(\.\d+)*(\+\d+-g[0-9a-f]+|\+[0-9a-z]+)?(-[^\s]+)?$`)
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envTags = []string{
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"STGUIASSETS",
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"STHASHING",
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"STNORESTART",
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"STNOUPGRADE",
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}
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)
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const versionExtraAllowedChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-. "
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func init() {
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if Version != "unknown-dev" {
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// If not a generic dev build, version string should come from git describe
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if !allowedVersionExp.MatchString(Version) {
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log.Fatalf("Invalid version string %q;\n\tdoes not match regexp %v", Version, allowedVersionExp)
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}
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}
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setBuildData()
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}
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func setBuildData() {
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// Check for a clean release build. A release is something like
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// "v0.1.2", with an optional suffix of letters and dot separated
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// numbers like "-beta3.47". If there's more stuff, like a plus sign and
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// a commit hash and so on, then it's not a release. If it has a dash in
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// it, it's some sort of beta, release candidate or special build. If it
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// has "-rc." in it, like "v0.14.35-rc.42", then it's a candidate build.
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//
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// So, every build that is not a stable release build has IsBeta = true.
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// This is used to enable some extra debugging (the deadlock detector).
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//
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// Release candidate builds are also "betas" from this point of view and
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// will have that debugging enabled. In addition, some features are
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// forced for release candidates - auto upgrade, and usage reporting.
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exp := regexp.MustCompile(`^v\d+\.\d+\.\d+(-[a-z]+[\d\.]+)?$`)
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IsRelease = exp.MatchString(Version)
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IsCandidate = strings.Contains(Version, "-rc.")
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IsBeta = strings.Contains(Version, "-")
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Extra = filterString(os.Getenv("STVERSIONEXTRA"), versionExtraAllowedChars)
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stamp, _ := strconv.Atoi(Stamp)
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Date = time.Unix(int64(stamp), 0)
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LongVersion = LongVersionFor("syncthing")
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}
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// LongVersionFor returns the long version string for the given program name.
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func LongVersionFor(program string) string {
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// This string and date format is essentially part of our external API. Never change it.
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date := Date.UTC().Format("2006-01-02 15:04:05 MST")
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v := fmt.Sprintf(`%s %s "%s" (%s %s-%s) %s@%s %s`, program, Version, Codename, runtime.Version(), runtime.GOOS, runtime.GOARCH, User, Host, date)
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if tags := TagsList(); len(tags) > 0 {
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v = fmt.Sprintf("%s [%s]", v, strings.Join(tags, ", "))
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}
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return v
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}
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func TagsList() []string {
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tags := strings.Split(Tags, ",")
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if len(tags) == 1 && tags[0] == "" {
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tags = tags[:0]
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}
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for _, envVar := range envTags {
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if os.Getenv(envVar) != "" {
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tags = append(tags, strings.ToLower(envVar))
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}
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}
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if Extra != "" {
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tags = append(tags, Extra)
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}
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sort.Strings(tags)
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return tags
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}
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// filterString returns a copy of s with all characters not in allowedChars
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// removed.
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func filterString(s, allowedChars string) string {
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var res strings.Builder
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for _, c := range s {
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if strings.ContainsRune(allowedChars, c) {
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res.WriteRune(c)
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}
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}
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return res.String()
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}
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