Run issue_reviver via GitHub.

PiperOrigin-RevId: 311600872

.github/workflows/issue_reviver.yml

@@ -0,0 +1,14 @@
+name: "Issue reviver"
+on:
+  schedule:
+    - cron: '0 0 * * *'
+
+jobs:
+  label:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - run: make run TARGETS="//tools/issue_reviver"
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        GITHUB_REPOSITORY: ${{ github.repository }}

tools/bazel.mk

@@ -59,6 +59,8 @@ SHELL=/bin/bash -o pipefail
 ##     DOCKER_SOCKET      - The Docker socket (default: detected).
 ##
 bazel-server-start: load-default ## Starts the bazel server.
+	@mkdir -p $(BAZEL_CACHE)
+	@mkdir -p $(GCLOUD_CONFIG)
 	docker run -d --rm \
 		--init \
 	        --name $(DOCKER_NAME) \

tools/issue_reviver/main.go

@@ -20,6 +20,7 @@ import (
 	"fmt"
 	"io/ioutil"
 	"os"
+	"strings"
 
 	"gvisor.dev/gvisor/tools/issue_reviver/github"
 	"gvisor.dev/gvisor/tools/issue_reviver/reviver"
@@ -35,14 +36,22 @@ var (
 
 // Keep the options simple for now. Supports only a single path and repo.
 func init() {
-	flag.StringVar(&owner, "owner", "google", "Github project org/owner to look for issues")
-	flag.StringVar(&repo, "repo", "gvisor", "Github repo to look for issues")
+	flag.StringVar(&owner, "owner", "", "Github project org/owner to look for issues")
+	flag.StringVar(&repo, "repo", "", "Github repo to look for issues")
 	flag.StringVar(&tokenFile, "oauth-token-file", "", "Path to file containing the OAUTH token to be used as credential to github")
-	flag.StringVar(&path, "path", "", "Path to scan for TODOs")
+	flag.StringVar(&path, "path", ".", "Path to scan for TODOs")
 	flag.BoolVar(&dryRun, "dry-run", false, "If set to true, no changes are made to issues")
 }
 
 func main() {
+	// Set defaults from the environment.
+	repository := os.Getenv("GITHUB_REPOSITORY")
+	if parts := strings.SplitN(repository, "/", 2); len(parts) == 2 {
+		owner = parts[0]
+		repo = parts[1]
+	}
+
+	// Parse flags.
 	flag.Parse()
 
 	// Check for mandatory parameters.
@@ -62,8 +71,10 @@ func main() {
 		os.Exit(1)
 	}
 
-	// Token is passed as a file so it doesn't show up in command line arguments.
-	var token string
+	// The access token may be passed as a file so it doesn't show up in
+	// command line arguments. It also may be provided through the
+	// environment to faciliate use through GitHub's CI system.
+	token := os.Getenv("GITHUB_TOKEN")
 	if len(tokenFile) != 0 {
 		bytes, err := ioutil.ReadFile(tokenFile)
 		if err != nil {