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// Copyright 2021 The Bazel Authors. All rights reserved.
//
// 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.
package main
import (
"bytes"
"context"
"errors"
"fmt"
"os"
"strings"
"github.com/google/go-github/v36/github"
)
type githubClient struct {
*github.Client
}
func (gh *githubClient) listTags(ctx context.Context, org, repo string) (_ []*github.RepositoryTag, err error) {
defer func() {
if err != nil {
err = fmt.Errorf("listing tags in github.com/%s/%s: %w", org, repo, err)
}
}()
var allTags []*github.RepositoryTag
err = gh.listPages(func(opts *github.ListOptions) (*github.Response, error) {
tags, resp, err := gh.Repositories.ListTags(ctx, org, repo, opts)
if err != nil {
return nil, err
}
allTags = append(allTags, tags...)
return resp, nil
})
if err != nil {
return nil, err
}
return allTags, nil
}
func (gh *githubClient) listReleases(ctx context.Context, org, repo string) (_ []*github.RepositoryRelease, err error) {
defer func() {
if err != nil {
err = fmt.Errorf("listing releases in github.com/%s/%s: %w", org, repo, err)
}
}()
var allReleases []*github.RepositoryRelease
err = gh.listPages(func(opts *github.ListOptions) (*github.Response, error) {
releases, resp, err := gh.Repositories.ListReleases(ctx, org, repo, opts)
if err != nil {
return nil, err
}
allReleases = append(allReleases, releases...)
return resp, nil
})
if err != nil {
return nil, err
}
return allReleases, nil
}
// getReleaseByTagIncludingDraft is like
// github.RepositoriesService.GetReleaseByTag, but it also considers draft
// releases that aren't tagged yet.
func (gh *githubClient) getReleaseByTagIncludingDraft(ctx context.Context, org, repo, tag string) (*github.RepositoryRelease, error) {
releases, err := gh.listReleases(ctx, org, repo)
if err != nil {
return nil, err
}
for _, release := range releases {
if release.GetTagName() == tag {
return release, nil
}
}
return nil, errReleaseNotFound
}
var errReleaseNotFound = errors.New("release not found")
// githubListPages calls fn repeatedly to get all pages of a large result.
// This is useful for fetching all tags or all comments or something similar.
func (gh *githubClient) listPages(fn func(opt *github.ListOptions) (*github.Response, error)) error {
opt := &github.ListOptions{PerPage: 50}
for {
resp, err := fn(opt)
if err != nil {
return err
}
if resp.NextPage == 0 {
return nil
}
opt.Page = resp.NextPage
}
}
// githubTokenFlag is used to find a GitHub personal access token on the
// command line. It accepts a raw token or a path to a file containing a token.
type githubTokenFlag string
func (f *githubTokenFlag) Set(v string) error {
if strings.HasPrefix(v, "ghp_") {
*(*string)(f) = v
return nil
}
data, err := os.ReadFile(v)
if err != nil {
return fmt.Errorf("reading GitHub token: %w", err)
}
*(*string)(f) = string(bytes.TrimSpace(data))
return nil
}
func (f *githubTokenFlag) String() string {
if f == nil {
return ""
}
return string(*f)
}
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