cmd/issuelock: new tool to freeze old Github issues

Updates golang/go#14903

Change-Id: I0d9a8482235ef7f94e2409eaa9b30ac161325711
Reviewed-on: https://go-review.googlesource.com/24504
Reviewed-by: Ian Lance Taylor <iant@golang.org>

cmd/issuelock/issuelock.go

@@ -0,0 +1,70 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Command issuelock locks Github issues.
+package main
+
+import (
+	"io/ioutil"
+	"log"
+	"os"
+	"path/filepath"
+	"strings"
+	"time"
+
+	"github.com/google/go-github/github"
+	"golang.org/x/oauth2"
+)
+
+func main() {
+	tokenFile := filepath.Join(os.Getenv("HOME"), "keys", "github-gobot")
+	slurp, err := ioutil.ReadFile(tokenFile)
+	if err != nil {
+		log.Fatal(err)
+	}
+	f := strings.SplitN(strings.TrimSpace(string(slurp)), ":", 2)
+	if len(f) != 2 || f[0] == "" || f[1] == "" {
+		log.Fatalf("Expected token file %s to be of form <username>:<token>", tokenFile)
+	}
+	ts := oauth2.StaticTokenSource(&oauth2.Token{AccessToken: f[1]})
+	tc := oauth2.NewClient(oauth2.NoContext, ts)
+	client := github.NewClient(tc)
+
+	tooOld := time.Now().Add(-365 * 24 * time.Hour).Format("2006-01-02")
+	log.Printf("Freezing closed issues before %v", tooOld)
+	for {
+		result, response, err := client.Search.Issues("repo:golang/go is:closed -label:FrozenDueToAge updated:<="+tooOld, &github.SearchOptions{
+			Sort:  "created",
+			Order: "asc",
+			ListOptions: github.ListOptions{
+				PerPage: 500,
+			},
+		})
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		if *result.Total == 0 {
+			return
+		}
+		log.Printf("Matches: %d, Res: %#v", *result.Total, response)
+		for _, is := range result.Issues {
+			num := *is.Number
+			log.Printf("Freezing issue: %d", *is.Number)
+			if err := freeze(client, num); err != nil {
+				log.Fatal(err)
+			}
+			time.Sleep(500 * time.Millisecond) // be nice to github
+		}
+	}
+}
+
+func freeze(client *github.Client, issueNum int) error {
+	_, err := client.Issues.Lock("golang", "go", issueNum)
+	if err != nil {
+		return err
+	}
+	_, _, err = client.Issues.AddLabelsToIssue("golang", "go", issueNum, []string{"FrozenDueToAge"})
+	return err
+}