mirror of
https://github.com/rocky-linux/peridot.git
synced 2024-11-24 06:01:25 +00:00
75 lines
2.0 KiB
Go
75 lines
2.0 KiB
Go
// Copyright 2023 Google LLC
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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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package externalaccount
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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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var (
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// version is a package internal global variable for testing purposes.
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version = runtime.Version
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)
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// versionUnknown is only used when the runtime version cannot be determined.
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const versionUnknown = "UNKNOWN"
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// goVersion returns a Go runtime version derived from the runtime environment
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// that is modified to be suitable for reporting in a header, meaning it has no
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// whitespace. If it is unable to determine the Go runtime version, it returns
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// versionUnknown.
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func goVersion() string {
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const develPrefix = "devel +"
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s := version()
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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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} else if p := strings.IndexFunc(s, unicode.IsSpace); p >= 0 {
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s = s[:p]
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}
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notSemverRune := func(r rune) bool {
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return !strings.ContainsRune("0123456789.", r)
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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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// Some release candidates already have a dash in them.
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if !strings.HasPrefix(prerelease, "-") {
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prerelease = "-" + prerelease
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}
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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 versionUnknown
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}
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