82 lines
2.5 KiB
Go
82 lines
2.5 KiB
Go
/*
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Copyright 2020 The Kubernetes Authors All rights reserved.
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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 update
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import (
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"context"
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"strings"
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"golang.org/x/mod/semver"
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"github.com/google/go-github/v43/github"
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)
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const (
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// ghListPerPage uses max value (100) for PerPage to avoid hitting the rate limits.
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// (ref: https://godoc.org/github.com/google/go-github/github#hdr-Rate_Limiting)
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ghListPerPage = 100
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// ghSearchLimit limits the number of searched items to be <= N * ghListPerPage.
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ghSearchLimit = 300
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)
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// GHReleases returns greatest current stable release and greatest latest rc or beta pre-release from GitHub owner/repo repository, and any error occurred.
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// If latest pre-release version is lower than the current stable release, then it will return current stable release for both.
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func GHReleases(ctx context.Context, owner, repo string) (stable, latest, edge string, err error) {
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ghc := github.NewClient(nil)
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// walk through the paginated list of up to ghSearchLimit newest releases
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opts := &github.ListOptions{PerPage: ghListPerPage}
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for (opts.Page+1)*ghListPerPage <= ghSearchLimit {
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rls, resp, err := ghc.Repositories.ListReleases(ctx, owner, repo, opts)
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if err != nil {
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return "", "", "", err
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}
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for _, rl := range rls {
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ver := rl.GetTagName()
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if !semver.IsValid(ver) {
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continue
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}
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// check if ver version is release (ie, 'v1.19.2') or pre-release (ie, 'v1.19.3-rc.0' or 'v1.19.0-beta.2')
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prerls := semver.Prerelease(ver)
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if prerls == "" {
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if semver.Compare(ver, stable) == 1 {
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stable = ver
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}
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} else if strings.HasPrefix(prerls, "-rc") || strings.HasPrefix(prerls, "-beta") {
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if semver.Compare(ver, latest) == 1 {
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latest = ver
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}
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} else if strings.Contains(prerls, "-alpha") {
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if semver.Compare(ver, edge) == 1 {
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edge = ver
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}
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}
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// make sure that latest >= stable
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if semver.Compare(latest, stable) == -1 {
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latest = stable
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}
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}
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if resp.NextPage == 0 {
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break
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}
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opts.Page = resp.NextPage
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}
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return stable, latest, edge, nil
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}
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