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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.
// Binary github is the entry point for GitHub utilities.
package main
import (
"context"
"flag"
"fmt"
"io/ioutil"
"os"
"os/exec"
"strings"
"github.com/google/go-github/github"
"golang.org/x/oauth2"
"gvisor.dev/gvisor/tools/github/nogo"
"gvisor.dev/gvisor/tools/github/reviver"
)
var (
owner string
repo string
tokenFile string
path string
commit string
dryRun bool
)
// Keep the options simple for now. Supports only a single path and repo.
func init() {
flag.StringVar(&owner, "owner", "", "GitHub project org/owner (required, except nogo dry-run)")
flag.StringVar(&repo, "repo", "", "GitHub repo (required, except nogo dry-run)")
flag.StringVar(&tokenFile, "oauth-token-file", "", "file containing the GitHub token (or GITHUB_TOKEN is set)")
flag.StringVar(&path, "path", ".", "path to scan (required for revive and nogo)")
flag.StringVar(&commit, "commit", "", "commit to associated (required for nogo, except dry-run)")
flag.BoolVar(&dryRun, "dry-run", false, "just print changes to be made")
}
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.Usage = func() {
fmt.Fprintf(flag.CommandLine.Output(), "usage: %s [options] <command>\n", os.Args[0])
fmt.Fprintf(flag.CommandLine.Output(), "commands: revive, nogo\n")
flag.PrintDefaults()
}
flag.Parse()
args := flag.Args()
if len(args) != 1 {
fmt.Fprintf(flag.CommandLine.Output(), "extra arguments: %s\n", strings.Join(args[1:], ", "))
flag.Usage()
os.Exit(1)
}
// Check for mandatory parameters.
command := args[0]
if len(owner) == 0 && (command != "nogo" || !dryRun) {
fmt.Fprintln(flag.CommandLine.Output(), "missing --owner option.")
flag.Usage()
os.Exit(1)
}
if len(repo) == 0 && (command != "nogo" || !dryRun) {
fmt.Fprintln(flag.CommandLine.Output(), "missing --repo option.")
flag.Usage()
os.Exit(1)
}
if len(path) == 0 {
fmt.Fprintln(flag.CommandLine.Output(), "missing --path option.")
flag.Usage()
os.Exit(1)
}
// 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 {
fmt.Println(err.Error())
os.Exit(1)
}
token = string(bytes)
}
var client *github.Client
if len(token) == 0 {
// Client is unauthenticated.
client = github.NewClient(nil)
} else {
// Using the above token.
ts := oauth2.StaticTokenSource(
&oauth2.Token{AccessToken: token},
)
tc := oauth2.NewClient(context.Background(), ts)
client = github.NewClient(tc)
}
switch command {
case "revive":
// Load existing GitHub bugs.
bugger, err := reviver.NewGitHubBugger(client, owner, repo, dryRun)
if err != nil {
fmt.Fprintf(os.Stderr, "Error getting github issues: %v\n", err)
os.Exit(1)
}
// Scan the provided path.
rev := reviver.New([]string{path}, []reviver.Bugger{bugger})
if errs := rev.Run(); len(errs) > 0 {
fmt.Fprintf(os.Stderr, "Encountered %d errors:\n", len(errs))
for _, err := range errs {
fmt.Fprintf(os.Stderr, "\t%v\n", err)
}
os.Exit(1)
}
case "nogo":
// Did we get a commit? Try to extract one.
if len(commit) == 0 && !dryRun {
cmd := exec.Command("git", "rev-parse", "HEAD")
revBytes, err := cmd.Output()
if err != nil {
fmt.Fprintf(flag.CommandLine.Output(), "missing --commit option, unable to infer: %v\n", err)
flag.Usage()
os.Exit(1)
}
commit = strings.TrimSpace(string(revBytes))
}
// Scan all findings.
poster := nogo.NewFindingsPoster(client, owner, repo, commit, dryRun)
if err := poster.Walk(path); err != nil {
fmt.Fprintln(os.Stderr, "Error finding nogo findings:", err)
os.Exit(1)
}
// Post to GitHub.
if err := poster.Post(); err != nil {
fmt.Fprintln(os.Stderr, "Error posting nogo findings:", err)
}
default:
// Not a known command.
fmt.Fprintf(flag.CommandLine.Output(), "unknown command: %s\n", command)
flag.Usage()
os.Exit(1)
}
}
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