/
github.go
126 lines (118 loc) · 2.73 KB
/
github.go
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package client
import (
"context"
"fmt"
"strings"
"time"
"github.com/google/go-github/github"
"github.com/prometheus/common/log"
"golang.org/x/oauth2"
)
func NewClient(ctx context.Context, token string, maxReleases int) Client {
var client = github.NewClient(nil)
if token != "" {
client = github.NewClient(oauth2.NewClient(
ctx,
oauth2.StaticTokenSource(&oauth2.Token{AccessToken: token}),
))
}
return githubClient{
ctx: ctx,
client: client,
max: maxReleases,
}
}
type githubClient struct {
client *github.Client
ctx context.Context
max int
}
func (c githubClient) Releases(repository string) ([]Release, error) {
var allReleases []Release
owner, repo, err := splitRepo(repository)
if err != nil {
return allReleases, err
}
var opt = &github.ListOptions{PerPage: 100}
for {
releases, resp, err := c.client.Repositories.ListReleases(c.ctx, owner, repo, opt)
if rateLimited(err) {
continue
}
if err != nil {
return allReleases, err
}
for _, release := range releases {
allReleases = append(allReleases, Release{
ID: release.GetID(),
Tag: release.GetTagName(),
})
if c.max > 0 && len(allReleases) >= c.max {
return allReleases, nil
}
}
if resp.NextPage == 0 {
return allReleases, nil
}
opt.Page = resp.NextPage
}
}
func (c githubClient) Assets(repository string, id int64) ([]Asset, error) {
var allAssets = []Asset{}
owner, repo, err := splitRepo(repository)
if err != nil {
return allAssets, err
}
var opt = &github.ListOptions{PerPage: 100}
for {
assets, resp, err := c.client.Repositories.ListReleaseAssets(c.ctx, owner, repo, id, opt)
if rateLimited(err) {
continue
}
if err != nil {
return allAssets, err
}
for _, asset := range assets {
allAssets = append(allAssets, Asset{
Name: asset.GetName(),
Downloads: asset.GetDownloadCount(),
})
}
if resp.NextPage == 0 {
return allAssets, nil
}
opt.Page = resp.NextPage
}
}
// nolint: godox
// TODO: maybe keep a global rate limiter?
func rateLimited(err error) bool {
if err == nil {
return false
}
rerr, ok := err.(*github.RateLimitError)
if ok {
var d = time.Until(rerr.Rate.Reset.Time)
log.Warnf("hit rate limit, sleeping for %.0f min", d.Minutes())
time.Sleep(d)
return true
}
aerr, ok := err.(*github.AbuseRateLimitError)
if ok {
var d = aerr.GetRetryAfter()
log.Warnf("hit abuse mechanism, sleeping for %.f min", d.Minutes())
time.Sleep(d)
return true
}
return false
}
func splitRepo(repository string) (string, string, error) {
parts := strings.Split(repository, "/")
if len(parts) < 2 {
return "", "", fmt.Errorf(
"invalid repository: %s. should be in the owner/repo format",
repository,
)
}
return parts[0], parts[1], nil
}