// NewEnviromentConfig sets up the initial config from environment variables
func NewEnviromentConfig() (*Config, error) {
config := NewDefaultConfig()
home := os.Getenv("GIT_HOME")
if len(home) == 0 {
return nil, fmt.Errorf("GIT_HOME is required")
}
abs, err := filepath.Abs(home)
if err != nil {
return nil, fmt.Errorf("can't make %q absolute: %v", home, err)
}
if stat, err := os.Stat(abs); err != nil || !stat.IsDir() {
return nil, fmt.Errorf("GIT_HOME must be an existing directory: %v", err)
}
config.Home = home
if publicURL := os.Getenv("PUBLIC_URL"); len(publicURL) > 0 {
valid, err := url.Parse(publicURL)
if err != nil {
return nil, fmt.Errorf("PUBLIC_URL must be a valid URL: %v", err)
}
config.URL = valid
}
gitpath := os.Getenv("GIT_PATH")
if len(gitpath) == 0 {
path, err := exec.LookPath("git")
if err != nil {
return nil, fmt.Errorf("could not find 'git' in PATH; specify GIT_PATH or set your PATH")
}
gitpath = path
}
config.GitBinary = gitpath
config.AllowPush = os.Getenv("ALLOW_GIT_PUSH") != "no"
config.AllowHooks = os.Getenv("ALLOW_GIT_HOOKS") != "no"
config.AllowLazyCreate = os.Getenv("ALLOW_LAZY_CREATE") != "no"
if hookpath := os.Getenv("HOOK_PATH"); len(hookpath) != 0 {
path, err := filepath.Abs(hookpath)
if err != nil {
return nil, fmt.Errorf("HOOK_PATH was set but cannot be made absolute: %v", err)
}
if stat, err := os.Stat(path); err != nil || !stat.IsDir() {
return nil, fmt.Errorf("HOOK_PATH must be an existing directory if set: %v", err)
}
config.HookDirectory = path
}
if value := os.Getenv("REQUIRE_GIT_AUTH"); len(value) > 0 {
parts := strings.Split(value, ":")
if len(parts) != 2 {
return nil, fmt.Errorf("REQUIRE_GIT_AUTH must be a username and password separated by a ':'")
}
username, password := parts[0], parts[1]
config.AuthenticatorFn = auth.Authenticator(func(info auth.AuthInfo) (bool, error) {
if info.Push && !config.AllowPush {
return false, nil
}
if info.Username != username || info.Password != password {
return false, nil
}
return true, nil
})
}
if value := os.Getenv("GIT_LISTEN"); len(value) > 0 {
config.Listen = value
}
config.CleanBeforeClone = os.Getenv("GIT_FORCE_CLEAN") == "yes"
clones := make(map[string]Clone)
for _, env := range os.Environ() {
if !strings.HasPrefix(env, initialClonePrefix) {
continue
}
parts := strings.SplitN(env, "=", 2)
if len(parts) != 2 {
continue
}
key, value := parts[0], parts[1]
part := key[len(initialClonePrefix):]
if len(part) == 0 {
continue
}
if len(value) == 0 {
return nil, fmt.Errorf("%s must not have an empty value", key)
}
defaultName := strings.Replace(strings.ToLower(part), "_", "-", -1)
values := strings.Split(value, ";")
var uri, name string
switch len(values) {
case 1:
uri, name = values[0], ""
case 2:
uri, name = values[0], values[1]
if len(name) == 0 {
return nil, fmt.Errorf("%s name may not be empty", key)
}
default:
return nil, fmt.Errorf("%s may only have two segments (<url> or <url>;<name>)", key)
}
url, err := git.ParseRepository(uri)
if err != nil {
return nil, fmt.Errorf("%s is not a valid repository URI: %v", key, err)
}
switch url.Scheme {
case "http", "https", "git", "ssh":
default:
return nil, fmt.Errorf("%s %q must be a http, https, git, or ssh URL", key, uri)
}
if len(name) == 0 {
if n, ok := git.NameFromRepositoryURL(url); ok {
name = n + ".git"
}
}
if len(name) == 0 {
name = defaultName + ".git"
}
if invalidCloneNameChars.MatchString(name) {
return nil, fmt.Errorf("%s name %q must be only letters, numbers, dashes, or underscores", key, name)
}
if _, ok := reservedNames[name]; ok {
return nil, fmt.Errorf("%s name %q is reserved (%v)", key, name, reservedNames)
}
clones[name] = Clone{
URL: *url,
}
}
config.InitialClones = clones
return config, nil
}
// NewEnviromentConfig sets up the initial config from environment variables
func NewEnviromentConfig() (*Config, error) {
config := NewDefaultConfig()
home := os.Getenv("GIT_HOME")
if len(home) == 0 {
return nil, fmt.Errorf("GIT_HOME is required")
}
abs, err := filepath.Abs(home)
if err != nil {
return nil, fmt.Errorf("can't make %q absolute: %v", home, err)
}
if stat, err := os.Stat(abs); err != nil || !stat.IsDir() {
return nil, fmt.Errorf("GIT_HOME must be an existing directory: %v", err)
}
config.Home = home
if publicURL := os.Getenv("PUBLIC_URL"); len(publicURL) > 0 {
valid, err := url.Parse(publicURL)
if err != nil {
return nil, fmt.Errorf("PUBLIC_URL must be a valid URL: %v", err)
}
config.URL = valid
}
gitpath := os.Getenv("GIT_PATH")
if len(gitpath) == 0 {
path, err := exec.LookPath("git")
if err != nil {
return nil, fmt.Errorf("could not find 'git' in PATH; specify GIT_PATH or set your PATH")
}
gitpath = path
}
config.GitBinary = gitpath
config.AllowPush = os.Getenv("ALLOW_GIT_PUSH") != "no"
config.AllowHooks = os.Getenv("ALLOW_GIT_HOOKS") != "no"
config.AllowLazyCreate = os.Getenv("ALLOW_LAZY_CREATE") != "no"
if hookpath := os.Getenv("HOOK_PATH"); len(hookpath) != 0 {
path, err := filepath.Abs(hookpath)
if err != nil {
return nil, fmt.Errorf("HOOK_PATH was set but cannot be made absolute: %v", err)
}
if stat, err := os.Stat(path); err != nil || !stat.IsDir() {
return nil, fmt.Errorf("HOOK_PATH must be an existing directory if set: %v", err)
}
config.HookDirectory = path
}
allowAnonymousGet := os.Getenv("ALLOW_ANON_GIT_PULL") == "yes"
serverAuth := os.Getenv("REQUIRE_SERVER_AUTH")
gitAuth := os.Getenv("REQUIRE_GIT_AUTH")
if len(serverAuth) > 0 && len(gitAuth) > 0 {
return nil, fmt.Errorf("only one of REQUIRE_SERVER_AUTH or REQUIRE_GIT_AUTH may be specified")
}
if len(serverAuth) > 0 {
namespace := os.Getenv("AUTH_NAMESPACE")
if len(namespace) == 0 {
return nil, fmt.Errorf("when REQUIRE_SERVER_AUTH is set, AUTH_NAMESPACE must also be specified")
}
if serverAuth == "-" {
serverAuth = ""
}
rules := clientcmd.NewDefaultClientConfigLoadingRules()
rules.ExplicitPath = serverAuth
kubeconfig := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(rules, &clientcmd.ConfigOverrides{})
cfg, err := kubeconfig.ClientConfig()
if err != nil {
return nil, fmt.Errorf("could not create a client for REQUIRE_SERVER_AUTH: %v", err)
}
osc, err := client.New(cfg)
if err != nil {
return nil, fmt.Errorf("could not create a client for REQUIRE_SERVER_AUTH: %v", err)
}
config.AuthMessage = fmt.Sprintf("Authenticating against %s allow-push=%t anon-pull=%t", cfg.Host, config.AllowPush, allowAnonymousGet)
config.AuthenticatorFn = auth.Authenticator(func(info auth.AuthInfo) (bool, error) {
if !info.Push && allowAnonymousGet {
return true, nil
}
req := &authapi.LocalSubjectAccessReview{
Action: authapi.AuthorizationAttributes{
Verb: "get",
Resource: "pods",
},
}
if info.Push {
if !config.AllowPush {
return false, nil
}
req.Action.Verb = "create"
}
res, err := osc.ImpersonateLocalSubjectAccessReviews(namespace, info.Password).Create(req)
if err != nil {
if se, ok := err.(*errors.StatusError); ok {
return false, &statusError{se}
}
return false, err
}
//log.Printf("debug: server response allowed=%t message=%s", res.Allowed, res.Reason)
return res.Allowed, nil
})
}
if len(gitAuth) > 0 {
parts := strings.Split(gitAuth, ":")
if len(parts) != 2 {
return nil, fmt.Errorf("REQUIRE_GIT_AUTH must be a username and password separated by a ':'")
}
config.AuthMessage = fmt.Sprintf("Authenticating against username/password allow-push=%t", config.AllowPush)
username, password := parts[0], parts[1]
config.AuthenticatorFn = auth.Authenticator(func(info auth.AuthInfo) (bool, error) {
if info.Push {
if !config.AllowPush {
return false, nil
}
if allowAnonymousGet {
return true, nil
}
}
if info.Username != username || info.Password != password {
return false, nil
}
return true, nil
})
}
if value := os.Getenv("GIT_LISTEN"); len(value) > 0 {
config.Listen = value
}
config.CleanBeforeClone = os.Getenv("GIT_FORCE_CLEAN") == "yes"
clones := make(map[string]Clone)
for _, env := range os.Environ() {
if !strings.HasPrefix(env, initialClonePrefix) {
continue
}
parts := strings.SplitN(env, "=", 2)
if len(parts) != 2 {
continue
}
key, value := parts[0], parts[1]
part := key[len(initialClonePrefix):]
if len(part) == 0 {
continue
}
if len(value) == 0 {
return nil, fmt.Errorf("%s must not have an empty value", key)
}
defaultName := strings.Replace(strings.ToLower(part), "_", "-", -1)
values := strings.Split(value, ";")
var uri, name string
switch len(values) {
case 1:
uri, name = values[0], ""
case 2:
uri, name = values[0], values[1]
if len(name) == 0 {
return nil, fmt.Errorf("%s name may not be empty", key)
}
default:
return nil, fmt.Errorf("%s may only have two segments (<url> or <url>;<name>)", key)
}
url, err := git.ParseRepository(uri)
if err != nil {
return nil, fmt.Errorf("%s is not a valid repository URI: %v", key, err)
}
switch url.Scheme {
case "http", "https", "git", "ssh":
default:
return nil, fmt.Errorf("%s %q must be a http, https, git, or ssh URL", key, uri)
}
if len(name) == 0 {
if n, ok := git.NameFromRepositoryURL(url); ok {
name = n + ".git"
}
}
if len(name) == 0 {
name = defaultName + ".git"
}
if invalidCloneNameChars.MatchString(name) {
return nil, fmt.Errorf("%s name %q must be only letters, numbers, dashes, or underscores", key, name)
}
if _, ok := reservedNames[name]; ok {
return nil, fmt.Errorf("%s name %q is reserved (%v)", key, name, reservedNames)
}
clones[name] = Clone{
URL: *url,
}
}
config.InitialClones = clones
return config, nil
}