| // 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 |
| } |