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// Copyright 2019 The gVisor 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.
// Package github implements reviver.Bugger interface on top of Github issues.
package github
import (
"context"
"fmt"
"strconv"
"strings"
"time"
"github.com/google/go-github/github"
"golang.org/x/oauth2"
"gvisor.dev/gvisor/tools/issue_reviver/reviver"
)
// Bugger implements reviver.Bugger interface for github issues.
type Bugger struct {
owner string
repo string
dryRun bool
client *github.Client
issues map[int]*github.Issue
}
// NewBugger creates a new Bugger.
func NewBugger(token, owner, repo string, dryRun bool) (*Bugger, error) {
b := &Bugger{
owner: owner,
repo: repo,
dryRun: dryRun,
issues: map[int]*github.Issue{},
}
if err := b.load(token); err != nil {
return nil, err
}
return b, nil
}
func (b *Bugger) load(token string) error {
ctx := context.Background()
if len(token) == 0 {
fmt.Print("No OAUTH token provided, using unauthenticated account.\n")
b.client = github.NewClient(nil)
} else {
ts := oauth2.StaticTokenSource(
&oauth2.Token{AccessToken: token},
)
tc := oauth2.NewClient(ctx, ts)
b.client = github.NewClient(tc)
}
err := processAllPages(func(listOpts github.ListOptions) (*github.Response, error) {
opts := &github.IssueListByRepoOptions{State: "open", ListOptions: listOpts}
tmps, resp, err := b.client.Issues.ListByRepo(ctx, b.owner, b.repo, opts)
if err != nil {
return resp, err
}
for _, issue := range tmps {
b.issues[issue.GetNumber()] = issue
}
return resp, nil
})
if err != nil {
return err
}
fmt.Printf("Loaded %d issues from github.com/%s/%s\n", len(b.issues), b.owner, b.repo)
return nil
}
// Activate implements reviver.Bugger.
func (b *Bugger) Activate(todo *reviver.Todo) (bool, error) {
id, err := parseIssueNo(todo.Issue)
if err != nil {
return true, err
}
if id <= 0 {
return false, nil
}
// Check against active issues cache.
if _, ok := b.issues[id]; ok {
fmt.Printf("%q is active: OK\n", todo.Issue)
return true, nil
}
fmt.Printf("%q is not active: reopening issue %d\n", todo.Issue, id)
// Format comment with TODO locations and search link.
comment := strings.Builder{}
fmt.Fprintln(&comment, "There are TODOs still referencing this issue:")
for _, l := range todo.Locations {
fmt.Fprintf(&comment,
"1. [%s:%d](https://github.com/%s/%s/blob/HEAD/%s#%d): %s\n",
l.File, l.Line, b.owner, b.repo, l.File, l.Line, l.Comment)
}
fmt.Fprintf(&comment,
"\n\nSearch [TODO](https://github.com/%s/%s/search?q=%%22%s%%22)", b.owner, b.repo, todo.Issue)
if b.dryRun {
fmt.Printf("[dry-run: skipping change to issue %d]\n%s\n=======================\n", id, comment.String())
return true, nil
}
ctx := context.Background()
req := &github.IssueRequest{State: github.String("open")}
_, _, err = b.client.Issues.Edit(ctx, b.owner, b.repo, id, req)
if err != nil {
return true, fmt.Errorf("failed to reactivate issue %d: %v", id, err)
}
cmt := &github.IssueComment{
Body: github.String(comment.String()),
Reactions: &github.Reactions{Confused: github.Int(1)},
}
if _, _, err := b.client.Issues.CreateComment(ctx, b.owner, b.repo, id, cmt); err != nil {
return true, fmt.Errorf("failed to add comment to issue %d: %v", id, err)
}
return true, nil
}
// parseIssueNo parses the issue number out of the issue url.
func parseIssueNo(url string) (int, error) {
const prefix = "gvisor.dev/issue/"
// First check if I can handle the TODO.
idStr := strings.TrimPrefix(url, prefix)
if len(url) == len(idStr) {
return 0, nil
}
id, err := strconv.ParseInt(strings.TrimRight(idStr, "/"), 10, 64)
if err != nil {
return 0, err
}
return int(id), nil
}
func processAllPages(fn func(github.ListOptions) (*github.Response, error)) error {
opts := github.ListOptions{PerPage: 1000}
for {
resp, err := fn(opts)
if err != nil {
if rateErr, ok := err.(*github.RateLimitError); ok {
duration := rateErr.Rate.Reset.Sub(time.Now())
if duration > 5*time.Minute {
return fmt.Errorf("Rate limited for too long: %v", duration)
}
fmt.Printf("Rate limited, sleeping for: %v\n", duration)
time.Sleep(duration)
continue
}
return err
}
if resp.NextPage == 0 {
return nil
}
opts.Page = resp.NextPage
}
}
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