forked from googleapis/google-cloud-go
/
version.go
66 lines (58 loc) · 1.76 KB
/
version.go
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// Copyright 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// +build go1.12
package wire
import (
"runtime/debug"
"strconv"
"strings"
)
const pubsubLiteModulePath = "cloud.google.com/go/pubsublite"
type version struct {
Major string
Minor string
}
// libraryVersion attempts to determine the pubsublite module version.
func libraryVersion() (version, bool) {
if buildInfo, ok := debug.ReadBuildInfo(); ok {
return pubsubliteModuleVersion(buildInfo)
}
return version{}, false
}
// pubsubliteModuleVersion extracts the module version from BuildInfo embedded
// in the binary. Only applies to binaries built with module support.
func pubsubliteModuleVersion(buildInfo *debug.BuildInfo) (version, bool) {
for _, dep := range buildInfo.Deps {
if dep.Path == pubsubLiteModulePath {
return parseModuleVersion(dep.Version)
}
}
return version{}, false
}
func parseModuleVersion(value string) (v version, ok bool) {
if strings.HasPrefix(value, "v") {
value = value[1:]
}
components := strings.Split(value, ".")
if len(components) >= 2 {
if _, err := strconv.ParseInt(components[0], 10, 32); err != nil {
return
}
if _, err := strconv.ParseInt(components[1], 10, 32); err != nil {
return
}
v = version{Major: components[0], Minor: components[1]}
ok = true
}
return
}