| // Copyright 2018, OpenCensus Authors |
| // |
| // 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 |
| // |
| // http://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 |
| // limitations under the License. |
| |
| // Command version checks that the version string matches the latest Git tag. |
| // This is expected to pass only on the master branch. |
| package main |
| |
| import ( |
| "bytes" |
| "fmt" |
| "log" |
| "os" |
| "os/exec" |
| "sort" |
| "strconv" |
| "strings" |
| |
| opencensus "go.opencensus.io" |
| ) |
| |
| func main() { |
| cmd := exec.Command("git", "tag") |
| var buf bytes.Buffer |
| cmd.Stdout = &buf |
| err := cmd.Run() |
| if err != nil { |
| log.Fatal(err) |
| } |
| var versions []version |
| for _, vStr := range strings.Split(buf.String(), "\n") { |
| if len(vStr) == 0 { |
| continue |
| } |
| // ignore pre-release versions |
| if isPreRelease(vStr) { |
| continue |
| } |
| versions = append(versions, parseVersion(vStr)) |
| } |
| sort.Slice(versions, func(i, j int) bool { |
| return versionLess(versions[i], versions[j]) |
| }) |
| latest := versions[len(versions)-1] |
| codeVersion := parseVersion("v" + opencensus.Version()) |
| if !versionLess(latest, codeVersion) { |
| fmt.Printf("exporter.Version is out of date with Git tags. Got %s; want something greater than %s\n", opencensus.Version(), latest) |
| os.Exit(1) |
| } |
| fmt.Printf("exporter.Version is up-to-date: %s\n", opencensus.Version()) |
| } |
| |
| type version [3]int |
| |
| func versionLess(v1, v2 version) bool { |
| for c := 0; c < 3; c++ { |
| if diff := v1[c] - v2[c]; diff != 0 { |
| return diff < 0 |
| } |
| } |
| return false |
| } |
| |
| func isPreRelease(vStr string) bool { |
| split := strings.Split(vStr[1:], ".") |
| return strings.Contains(split[2], "-") |
| } |
| |
| func parseVersion(vStr string) version { |
| split := strings.Split(vStr[1:], ".") |
| var ( |
| v version |
| err error |
| ) |
| for i := 0; i < 3; i++ { |
| v[i], err = strconv.Atoi(split[i]) |
| if err != nil { |
| fmt.Printf("Unrecognized version tag %q: %s\n", vStr, err) |
| os.Exit(2) |
| } |
| } |
| return v |
| } |
| |
| func (v version) String() string { |
| return fmt.Sprintf("%d.%d.%d", v[0], v[1], v[2]) |
| } |