mirror of https://github.com/knative/caching.git
81 lines
1.5 KiB
Go
81 lines
1.5 KiB
Go
/*
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Copyright 2022 The Knative Authors
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package changeset
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import (
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"regexp"
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"runtime/debug"
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"strconv"
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"sync"
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)
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const Unknown = "unknown"
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var (
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shaRegexp = regexp.MustCompile(`^[a-f0-9]{40,64}$`)
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rev string
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err error
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once sync.Once
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readBuildInfo = debug.ReadBuildInfo
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)
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// Get returns the 'vcs.revision' property from the embedded build information
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// If there is no embedded information 'unknown' will be returned
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//
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// The result will have a '-dirty' suffix if the workspace was not clean
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func Get() string {
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once.Do(func() {
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rev = get()
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})
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return rev
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}
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func get() string {
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info, ok := readBuildInfo()
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if !ok {
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return Unknown
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}
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var revision string
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var modified bool
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for _, s := range info.Settings {
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switch s.Key {
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case "vcs.revision":
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revision = s.Value
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case "vcs.modified":
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modified, _ = strconv.ParseBool(s.Value)
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}
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}
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if revision == "" {
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return Unknown
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}
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if shaRegexp.MatchString(revision) {
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revision = revision[:7]
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}
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if modified {
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revision += "-dirty"
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}
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return revision
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}
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