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github.go
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github.go
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// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you 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.
package uptd
import (
"context"
"strings"
"github.com/blang/semver"
"github.com/google/go-github/github"
"golang.org/x/oauth2"
)
var _ Provider = new(GithubProvider)
// GetLatestFunc is used by the GithubProvider to discover newer releases
type GetLatestFunc func(ctx context.Context, owner, repo string) (*github.RepositoryRelease, *github.Response, error)
// GithubProvider is the implementation of an update Provider that is used
// by the Updater struct
type GithubProvider struct {
latestFunc GetLatestFunc
owner string
repo string
}
// NewGithubProvider constructs a new GithubProvider from its parameters.
func NewGithubProvider(owner, repo, token string) (*GithubProvider, error) {
if token == "" {
return nil, errPersonalAccessTokenIsMissing
}
client := oauth2.NewClient(context.Background(), oauth2.StaticTokenSource(
&oauth2.Token{AccessToken: token},
))
return &GithubProvider{
latestFunc: github.NewClient(client).Repositories.GetLatestRelease,
owner: owner,
repo: repo,
}, nil
}
// Latest queries the remote Github repository to check for a newer version of
// the executable available.
func (u *GithubProvider) Latest() (LatestResponse, error) {
release, _, err := u.latestFunc(context.Background(), u.owner, u.repo)
if err != nil {
return LatestResponse{}, err
}
version, err := semver.Parse(strings.TrimPrefix(release.GetTagName(), "v"))
if err != nil {
return LatestResponse{}, err
}
return LatestResponse{
Version: version,
URL: release.GetHTMLURL(),
PreRelease: release.GetPrerelease() || release.GetDraft(),
}, err
}