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command_run.go
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command_run.go
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package main
import (
"context"
"errors"
"fmt"
"net/url"
"os"
"path/filepath"
"strings"
"time"
"github.com/docker/docker/client"
"github.com/hashicorp/go-multierror"
"github.com/reddec/git-pipe/backup"
"github.com/reddec/git-pipe/backup/filebackup"
"github.com/reddec/git-pipe/backup/nobackup"
"github.com/reddec/git-pipe/backup/objectstore"
"github.com/reddec/git-pipe/core"
"github.com/reddec/git-pipe/core/dns/cf"
"github.com/reddec/git-pipe/core/dns/noregister"
"github.com/reddec/git-pipe/core/dns/singlehost"
"github.com/reddec/git-pipe/core/event"
"github.com/reddec/git-pipe/core/ingress"
"github.com/reddec/git-pipe/core/ingress/dummy"
"github.com/reddec/git-pipe/core/ingress/embedded"
"github.com/reddec/git-pipe/core/network"
"github.com/reddec/git-pipe/core/storage"
"github.com/reddec/git-pipe/cryptor/symmetric"
"github.com/reddec/git-pipe/internal"
"github.com/reddec/git-pipe/pipe"
"github.com/reddec/git-pipe/remote"
"github.com/reddec/git-pipe/remote/git"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
)
type CommandRun struct {
Router Router
Network string `long:"network" short:"n" env:"NETWORK" description:"Network name for internal communication" default:"git-pipe"`
Interval time.Duration `long:"interval" short:"i" env:"INTERVAL" description:"Interval to poll repositories" default:"30s"`
Output string `long:"output" short:"o" env:"OUTPUT" description:"Output directory for clone" default:"repos"`
Backup string `long:"backup" short:"B" env:"BACKUP" description:"Backup location" default:"file://backups"`
BackupKey string `long:"backup-key" short:"K" env:"BACKUP_KEY" description:"Backup key" default:"git-pipe-change-me"`
BackupInterval time.Duration `long:"backup-interval" short:"I" env:"BACKUP_INTERVAL" description:"Backup interval" default:"1h"`
FQDN bool `long:"fqdn" short:"F" env:"FQDN" description:"Construct from URL unique FQDN based on path and domain"`
GracefulShutdown time.Duration `long:"graceful-shutdown" env:"GRACEFUL_SHUTDOWN" description:"Interval before server shutdown" default:"15s"`
EnvFile []string `long:"env-file" short:"e" env:"ENV_FILE" description:"Environment variables files"`
LogMode string `long:"log-mode" env:"LOG_MODE" description:"Logger mode" default:"development" choice:"production" choice:"development"`
LogLevel logLevel `long:"log-level" env:"LOG_LEVEL" description:"Log level" default:"debug"`
Provider string `long:"provider" short:"p" env:"PROVIDER" description:"DNS provider for auto registration" choice:"cloudflare"`
Cloudflare cf.Config `group:"Cloudflare config" namespace:"cloudflare" env-namespace:"CLOUDFLARE"`
Args struct {
Repos []string `positional-arg-name:"git-url" required:"1" description:"remote git URL to poll with optional branch/tag name after hash"`
} `positional-args:"true"`
}
type Router struct {
Domain string `long:"domain" short:"d" env:"DOMAIN" default:"localhost" description:"Root domain, default is hostname"`
Dummy bool `long:"dummy" short:"D" env:"DUMMY" description:"Dummy mode disables HTTP router"`
Bind string `long:"bind" short:"b" env:"BIND" description:"Addresses to where bind HTTP server" default:"127.0.0.1:8080"`
AutoTLS bool `long:"auto-tls" short:"T" env:"AUTO_TLS" description:"Automatic TLS (Let's Encrypt), ignores bind address and uses 0.0.0.0:443 port"`
TLS bool `long:"tls" env:"TLS" description:"Enable HTTPS serving with TLS. TLS files should support multiple domains, otherwise path-routing should be enabled. Ignored with --auto-tls'" json:"tls"`
SSLDir string `long:"ssl-dir" env:"SSL_DIR" description:"Directory for SSL certificates and keys. Should contain server.{crt,key} files unless auto-tls enabled. For auto-tls it is used as cache dir" default:"ssl"`
NoIndex bool `long:"no-index" env:"NO_INDEX" description:"Disable index page"`
PathRouting bool `long:"path-routing" short:"P" env:"PATH_ROUTING" description:"Enable path routing instead of domain-based. Implicitly disables --domain"`
JWT string `long:"jwt" env:"JWT" description:"Define JWT secret and enable JWT-based authorization"`
}
func (cmd *CommandRun) Execute([]string) error {
if cmd.Router.Domain == "" {
name, err := os.Hostname()
if err != nil {
return fmt.Errorf("detect hostname: %w", err)
}
cmd.Router.Domain = name
}
logger, err := cmd.logger()
if err != nil {
return fmt.Errorf("create logger: %w", err)
}
zap.ReplaceGlobals(logger)
defer logger.Sync()
ctx, cancel := context.WithCancel(global)
defer cancel()
backupProvider, err := cmd.createBackupProvider()
if err != nil {
return fmt.Errorf("initialize storage: %w", err)
}
encryption := &symmetric.Symmetric{Key: cmd.BackupKey}
dnsProvider, err := cmd.createDNSProvider(ctx)
if err != nil {
return fmt.Errorf("create DNS: %w", err)
}
if cmd.Router.PathRouting {
dnsProvider = singlehost.New(cmd.Router.Domain, dnsProvider)
}
docker, err := client.NewClientWithOpts(client.FromEnv, client.WithAPIVersionNegotiation())
if err != nil {
return fmt.Errorf("create docker client: %w", err)
}
defer docker.Close()
dockerNetwork, err := network.NewDockerNetwork(ctx, docker, cmd.Network)
if err != nil {
return fmt.Errorf("create docker network: %w", err)
}
var (
ingressImpl core.Ingress
router *embedded.Router
)
if cmd.Router.Dummy {
ingressImpl = dummy.New()
} else {
var resolver embedded.RequestResolver
if cmd.Router.PathRouting {
resolver = embedded.ByPath()
} else {
resolver = embedded.ByDomain(cmd.Router.Domain)
}
var chain []embedded.RouteHandler
if cmd.Router.JWT != "" {
chain = append(chain, embedded.JWT(cmd.Router.JWT))
}
chain = append(chain, embedded.Proxy(dockerNetwork))
router = embedded.New(resolver, chain...)
router.Index(!cmd.Router.NoIndex)
ingressImpl = ingress.New(router)
}
env := core.Base{
DNS: dnsProvider,
Ingress: ingressImpl,
Backup: storage.New(backupProvider, docker, encryption, "", "local", cmd.BackupInterval),
Network: dockerNetwork,
Docker: docker,
}
var wg multierror.Group
if router != nil {
wg.Go(func() error {
defer cancel()
return cmd.runRouter(ctx, router)
})
}
environ, err := cmd.environment()
if err != nil {
return fmt.Errorf("read environment: %w", err)
}
for _, repo := range cmd.Args.Repos {
source, err := git.FromURL(repo)
if err != nil {
return fmt.Errorf("load repo %s: %w", repo, err)
}
name := cmd.repoName(source)
dir := filepath.Join(cmd.Output, name)
repoEnv := &core.Environment{
Base: env,
Name: name,
Directory: dir,
Vars: filterEnvironment(environ, name),
Event: event.Noop(),
}
ref := source.Ref()
logger.Info("repository detected", zap.String("repo", ref.Redacted()), zap.String("name", name), zap.String("workdir", dir))
wg.Go(func() error {
defer cancel()
pipe.Run(ctx, source, repoEnv, cmd.Interval)
return nil
})
}
return wg.Wait().ErrorOrNil()
}
var (
errUnknownProvider = errors.New("unknown provider")
errUnknownBackupProtocol = errors.New("unknown backup protocol")
)
func (cmd CommandRun) createBackupProvider() (backup.Backup, error) {
if cmd.Backup == "" || cmd.Backup == "none" {
return &nobackup.NoBackup{}, nil
}
u, err := url.Parse(cmd.Backup)
if err != nil {
return nil, fmt.Errorf("parse url: %w", err)
}
switch u.Scheme {
case "s3":
return objectstore.FromURL(*u), nil
case "", "file", "dir":
return &filebackup.FileBackup{Directory: filepath.Join(u.Host, u.Path)}, nil
default:
return nil, errUnknownBackupProtocol
}
}
func (cmd CommandRun) createDNSProvider(ctx context.Context) (core.DNS, error) {
switch cmd.Provider {
case "cloudflare":
p, err := cf.New(ctx, cmd.Cloudflare)
if err != nil {
return nil, fmt.Errorf("create cloudflare DNS provider: %w", err)
}
return p, nil
case "":
return &noregister.NoRegister{}, nil
default:
return nil, errUnknownProvider
}
}
func (cmd CommandRun) runRouter(ctx context.Context, router *embedded.Router) error {
var allowedDomains = embedded.Static(cmd.Router.Domain)
if !cmd.Router.PathRouting {
allowedDomains = router
}
switch {
case cmd.Router.AutoTLS:
return embedded.RunAutoTLS(ctx, cmd.Router.SSLDir, allowedDomains, router)
case cmd.Router.TLS:
return embedded.RunTLS(ctx, cmd.Router.Bind, cmd.Router.SSLDir, router)
default:
return embedded.Run(ctx, cmd.Router.Bind, router)
}
}
func (cmd CommandRun) repoName(source remote.Source) string {
ref := source.Ref()
if cmd.FQDN {
return generateFullName(ref)
}
return generateSimpleName(ref)
}
func (cmd CommandRun) environment() (map[string]string, error) {
var env = make(map[string]string)
for _, file := range cmd.EnvFile {
v, err := internal.ReadEnvFile(file)
if err != nil {
return nil, fmt.Errorf("read env file: %w", err)
}
for k, v := range v {
env[k] = v
}
}
// merge system env
for _, item := range os.Environ() {
kv := strings.SplitN(item, "=", 2) //nolint:gomnd
if len(kv) != 0 {
continue
}
key, value := kv[0], kv[1]
env[key] = value
}
return env, nil
}
func (cmd CommandRun) logger() (*zap.Logger, error) {
opt := zap.IncreaseLevel(zap.NewAtomicLevelAt(zapcore.Level(cmd.LogLevel)))
switch cmd.LogMode {
case "production":
return zap.NewProduction(opt)
default:
return zap.NewDevelopment(opt)
}
}
func filterEnvironment(environ map[string]string, repoName string) map[string]string {
appPrefix := strings.ReplaceAll(strings.ToUpper(repoName), "-", "_") + "_"
var res = map[string]string{}
for key, value := range environ {
if !strings.HasPrefix(key, appPrefix) {
continue
}
realKey := strings.TrimPrefix(key, appPrefix)
res[realKey] = value
}
return res
}
func generateSimpleName(u url.URL) string {
names := strings.Split(u.Path, "/")
name := names[len(names)-1]
name = strings.TrimSuffix(name, ".git")
name = internal.ToDomain(name)
if name == "" {
return generateFullName(u)
}
return name
}
func generateFullName(u url.URL) string {
baseName := u.Path
name := strings.ReplaceAll(baseName, "/", ".")
name = strings.Trim(name, ".git")
name = internal.ToDomain(name)
name = strings.Trim(name, ".")
parts := strings.Split(name, ".")
for i := 0; i < len(parts)/2; i++ {
parts[i], parts[len(parts)-i-1] = parts[len(parts)-i-1], parts[i]
}
domain := strings.Join(parts, ".")
if hostname := u.Hostname(); hostname != "" {
domain += "." + hostname
}
return domain
}
type logLevel zapcore.Level
func (ll *logLevel) UnmarshalFlag(value string) error {
return (*zapcore.Level)(ll).UnmarshalText([]byte(value))
}