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71 lines
1.7 KiB
71 lines
1.7 KiB
// Copyright 2016 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:generate ./update_version.sh
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// Package version contains version information for Google Cloud Client
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// Libraries for Go, as reported in request headers.
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package version
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import (
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"runtime"
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"strings"
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"unicode"
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)
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// Repo is the current version of the client libraries in this
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// repo. It should be a date in YYYYMMDD format.
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const Repo = "20170404"
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// Go returns the Go runtime version. The returned string
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// has no whitespace.
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func Go() string {
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return goVersion
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}
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var goVersion = goVer(runtime.Version())
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const develPrefix = "devel +"
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func goVer(s string) string {
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if strings.HasPrefix(s, develPrefix) {
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s = s[len(develPrefix):]
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if p := strings.IndexFunc(s, unicode.IsSpace); p >= 0 {
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s = s[:p]
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}
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return s
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}
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if strings.HasPrefix(s, "go1") {
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s = s[2:]
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var prerelease string
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if p := strings.IndexFunc(s, notSemverRune); p >= 0 {
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s, prerelease = s[:p], s[p:]
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}
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if strings.HasSuffix(s, ".") {
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s += "0"
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} else if strings.Count(s, ".") < 2 {
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s += ".0"
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}
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if prerelease != "" {
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s += "-" + prerelease
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}
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return s
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}
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return ""
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}
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func notSemverRune(r rune) bool {
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return strings.IndexRune("0123456789.", r) < 0
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}
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