services/arv-git-httpd/main.go

   1 package main
   2
   3 import (
   4         "encoding/json"
   5         "flag"
   6         "log"
   7         "os"
   8         "regexp"
   9
  10         "git.curoverse.com/arvados.git/sdk/go/arvados"
  11         "git.curoverse.com/arvados.git/sdk/go/config"
  12         "github.com/coreos/go-systemd/daemon"
  13         "github.com/ghodss/yaml"
  14 )
  15
  16 // Server configuration
  17 type Config struct {
  18         Client       arvados.Client
  19         Listen       string
  20         GitCommand   string
  21         RepoRoot     string
  22         GitoliteHome string
  23 }
  24
  25 var theConfig = defaultConfig()
  26
  27 func defaultConfig() *Config {
  28         return &Config{
  29                 Listen:     ":80",
  30                 GitCommand: "/usr/bin/git",
  31                 RepoRoot:   "/var/lib/arvados/git/repositories",
  32         }
  33 }
  34
  35 func main() {
  36         const defaultCfgPath = "/etc/arvados/git-httpd/git-httpd.yml"
  37         const deprecated = " (DEPRECATED -- use config file instead)"
  38         flag.StringVar(&theConfig.Listen, "address", theConfig.Listen,
  39                 "Address to listen on, \"host:port\" or \":port\"."+deprecated)
  40         flag.StringVar(&theConfig.GitCommand, "git-command", theConfig.GitCommand,
  41                 "Path to git or gitolite-shell executable. Each authenticated request will execute this program with a single argument, \"http-backend\"."+deprecated)
  42         flag.StringVar(&theConfig.RepoRoot, "repo-root", theConfig.RepoRoot,
  43                 "Path to git repositories."+deprecated)
  44         flag.StringVar(&theConfig.GitoliteHome, "gitolite-home", theConfig.GitoliteHome,
  45                 "Value for GITOLITE_HTTP_HOME environment variable. If not empty, GL_BYPASS_ACCESS_CHECKS=1 will also be set."+deprecated)
  46
  47         cfgPath := flag.String("config", defaultCfgPath, "Configuration file `path`.")
  48         dumpConfig := flag.Bool("dump-config", false, "write current configuration to stdout and exit (useful for migrating from command line flags to config file)")
  49         flag.Usage = usage
  50         flag.Parse()
  51
  52         err := config.LoadFile(theConfig, *cfgPath)
  53         if err != nil {
  54                 h := os.Getenv("ARVADOS_API_HOST")
  55                 if h == "" || !os.IsNotExist(err) || *cfgPath != defaultCfgPath {
  56                         log.Fatal(err)
  57                 }
  58                 log.Print("DEPRECATED: No config file found, but ARVADOS_API_HOST environment variable is set. Please use a config file instead.")
  59                 theConfig.Client.APIHost = h
  60                 if regexp.MustCompile("^(?i:1|yes|true)$").MatchString(os.Getenv("ARVADOS_API_HOST_INSECURE")) {
  61                         theConfig.Client.Insecure = true
  62                 }
  63                 if j, err := json.MarshalIndent(theConfig, "", "    "); err == nil {
  64                         log.Print("Current configuration:\n", string(j))
  65                 }
  66         }
  67
  68         if *dumpConfig {
  69                 y, err := yaml.Marshal(theConfig)
  70                 if err != nil {
  71                         log.Fatal(err)
  72                 }
  73                 os.Stdout.Write(y)
  74                 os.Exit(0)
  75         }
  76
  77         srv := &server{}
  78         if err := srv.Start(); err != nil {
  79                 log.Fatal(err)
  80         }
  81         if _, err := daemon.SdNotify(false, "READY=1"); err != nil {
  82                 log.Printf("Error notifying init daemon: %v", err)
  83         }
  84         log.Println("Listening at", srv.Addr)
  85         log.Println("Repository root", theConfig.RepoRoot)
  86         if err := srv.Wait(); err != nil {
  87                 log.Fatal(err)
  88         }
  89 }