mirror of
https://github.com/moby/moby.git
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309 lines
7.7 KiB
Go
309 lines
7.7 KiB
Go
package opts
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import (
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"fmt"
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"net"
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"os"
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"path"
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"regexp"
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"strings"
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flag "github.com/docker/docker/pkg/mflag"
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"github.com/docker/docker/pkg/parsers"
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"github.com/docker/docker/pkg/ulimit"
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)
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var (
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alphaRegexp = regexp.MustCompile(`[a-zA-Z]`)
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domainRegexp = regexp.MustCompile(`^(:?(:?[a-zA-Z0-9]|(:?[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9]))(:?\.(:?[a-zA-Z0-9]|(:?[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])))*)\.?\s*$`)
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DefaultHTTPHost = "127.0.0.1" // Default HTTP Host used if only port is provided to -H flag e.g. docker -d -H tcp://:8080
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// TODO Windows. DefaultHTTPPort is only used on Windows if a -H parameter
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// is not supplied. A better longer term solution would be to use a named
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// pipe as the default on the Windows daemon.
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DefaultHTTPPort = 2375 // Default HTTP Port
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DefaultUnixSocket = "/var/run/docker.sock" // Docker daemon by default always listens on the default unix socket
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)
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func ListVar(values *[]string, names []string, usage string) {
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flag.Var(newListOptsRef(values, nil), names, usage)
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}
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func MapVar(values map[string]string, names []string, usage string) {
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flag.Var(newMapOpt(values, nil), names, usage)
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}
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func LogOptsVar(values map[string]string, names []string, usage string) {
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flag.Var(newMapOpt(values, ValidateLogOpts), names, usage)
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}
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func HostListVar(values *[]string, names []string, usage string) {
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flag.Var(newListOptsRef(values, ValidateHost), names, usage)
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}
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func IPListVar(values *[]string, names []string, usage string) {
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flag.Var(newListOptsRef(values, ValidateIPAddress), names, usage)
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}
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func DnsSearchListVar(values *[]string, names []string, usage string) {
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flag.Var(newListOptsRef(values, ValidateDnsSearch), names, usage)
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}
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func IPVar(value *net.IP, names []string, defaultValue, usage string) {
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flag.Var(NewIpOpt(value, defaultValue), names, usage)
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}
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func LabelListVar(values *[]string, names []string, usage string) {
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flag.Var(newListOptsRef(values, ValidateLabel), names, usage)
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}
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func UlimitMapVar(values map[string]*ulimit.Ulimit, names []string, usage string) {
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flag.Var(NewUlimitOpt(values), names, usage)
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}
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// ListOpts type
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type ListOpts struct {
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values *[]string
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validator ValidatorFctType
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}
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func NewListOpts(validator ValidatorFctType) ListOpts {
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var values []string
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return *newListOptsRef(&values, validator)
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}
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func newListOptsRef(values *[]string, validator ValidatorFctType) *ListOpts {
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return &ListOpts{
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values: values,
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validator: validator,
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}
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}
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func (opts *ListOpts) String() string {
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return fmt.Sprintf("%v", []string((*opts.values)))
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}
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// Set validates if needed the input value and add it to the
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// internal slice.
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func (opts *ListOpts) Set(value string) error {
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if opts.validator != nil {
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v, err := opts.validator(value)
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if err != nil {
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return err
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}
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value = v
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}
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(*opts.values) = append((*opts.values), value)
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return nil
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}
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// Delete remove the given element from the slice.
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func (opts *ListOpts) Delete(key string) {
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for i, k := range *opts.values {
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if k == key {
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(*opts.values) = append((*opts.values)[:i], (*opts.values)[i+1:]...)
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return
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}
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}
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}
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// GetMap returns the content of values in a map in order to avoid
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// duplicates.
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// FIXME: can we remove this?
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func (opts *ListOpts) GetMap() map[string]struct{} {
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ret := make(map[string]struct{})
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for _, k := range *opts.values {
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ret[k] = struct{}{}
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}
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return ret
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}
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// GetAll returns the values' slice.
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// FIXME: Can we remove this?
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func (opts *ListOpts) GetAll() []string {
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return (*opts.values)
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}
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// Get checks the existence of the given key.
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func (opts *ListOpts) Get(key string) bool {
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for _, k := range *opts.values {
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if k == key {
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return true
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}
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}
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return false
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}
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// Len returns the amount of element in the slice.
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func (opts *ListOpts) Len() int {
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return len((*opts.values))
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}
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//MapOpts type
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type MapOpts struct {
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values map[string]string
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validator ValidatorFctType
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}
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func (opts *MapOpts) Set(value string) error {
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if opts.validator != nil {
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v, err := opts.validator(value)
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if err != nil {
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return err
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}
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value = v
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}
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vals := strings.SplitN(value, "=", 2)
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if len(vals) == 1 {
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(opts.values)[vals[0]] = ""
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} else {
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(opts.values)[vals[0]] = vals[1]
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}
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return nil
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}
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func (opts *MapOpts) String() string {
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return fmt.Sprintf("%v", map[string]string((opts.values)))
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}
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func newMapOpt(values map[string]string, validator ValidatorFctType) *MapOpts {
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return &MapOpts{
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values: values,
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validator: validator,
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}
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}
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// Validators
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type ValidatorFctType func(val string) (string, error)
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type ValidatorFctListType func(val string) ([]string, error)
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func ValidateLogOpts(val string) (string, error) {
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allowedKeys := map[string]string{}
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vals := strings.Split(val, "=")
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if allowedKeys[vals[0]] != "" {
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return val, nil
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}
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return "", fmt.Errorf("%s is not a valid log opt", vals[0])
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}
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func ValidateAttach(val string) (string, error) {
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s := strings.ToLower(val)
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for _, str := range []string{"stdin", "stdout", "stderr"} {
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if s == str {
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return s, nil
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}
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}
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return val, fmt.Errorf("valid streams are STDIN, STDOUT and STDERR.")
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}
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func ValidateLink(val string) (string, error) {
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if _, _, err := parsers.ParseLink(val); err != nil {
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return val, err
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}
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return val, nil
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}
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func ValidatePath(val string) (string, error) {
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var containerPath string
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if strings.Count(val, ":") > 2 {
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return val, fmt.Errorf("bad format for volumes: %s", val)
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}
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splited := strings.SplitN(val, ":", 2)
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if len(splited) == 1 {
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containerPath = splited[0]
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val = path.Clean(splited[0])
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} else {
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containerPath = splited[1]
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val = fmt.Sprintf("%s:%s", splited[0], path.Clean(splited[1]))
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}
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if !path.IsAbs(containerPath) {
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return val, fmt.Errorf("%s is not an absolute path", containerPath)
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}
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return val, nil
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}
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func ValidateEnv(val string) (string, error) {
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arr := strings.Split(val, "=")
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if len(arr) > 1 {
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return val, nil
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}
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if !doesEnvExist(val) {
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return val, nil
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}
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return fmt.Sprintf("%s=%s", val, os.Getenv(val)), nil
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}
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func ValidateIPAddress(val string) (string, error) {
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var ip = net.ParseIP(strings.TrimSpace(val))
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if ip != nil {
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return ip.String(), nil
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}
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return "", fmt.Errorf("%s is not an ip address", val)
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}
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func ValidateMACAddress(val string) (string, error) {
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_, err := net.ParseMAC(strings.TrimSpace(val))
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if err != nil {
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return "", err
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}
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return val, nil
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}
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// Validates domain for resolvconf search configuration.
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// A zero length domain is represented by .
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func ValidateDnsSearch(val string) (string, error) {
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if val = strings.Trim(val, " "); val == "." {
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return val, nil
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}
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return validateDomain(val)
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}
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func validateDomain(val string) (string, error) {
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if alphaRegexp.FindString(val) == "" {
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return "", fmt.Errorf("%s is not a valid domain", val)
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}
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ns := domainRegexp.FindSubmatch([]byte(val))
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if len(ns) > 0 && len(ns[1]) < 255 {
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return string(ns[1]), nil
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}
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return "", fmt.Errorf("%s is not a valid domain", val)
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}
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func ValidateExtraHost(val string) (string, error) {
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// allow for IPv6 addresses in extra hosts by only splitting on first ":"
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arr := strings.SplitN(val, ":", 2)
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if len(arr) != 2 || len(arr[0]) == 0 {
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return "", fmt.Errorf("bad format for add-host: %q", val)
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}
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if _, err := ValidateIPAddress(arr[1]); err != nil {
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return "", fmt.Errorf("invalid IP address in add-host: %q", arr[1])
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}
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return val, nil
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}
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func ValidateLabel(val string) (string, error) {
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if strings.Count(val, "=") != 1 {
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return "", fmt.Errorf("bad attribute format: %s", val)
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}
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return val, nil
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}
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func ValidateHost(val string) (string, error) {
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host, err := parsers.ParseHost(DefaultHTTPHost, DefaultUnixSocket, val)
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if err != nil {
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return val, err
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}
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return host, nil
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}
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func doesEnvExist(name string) bool {
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for _, entry := range os.Environ() {
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parts := strings.SplitN(entry, "=", 2)
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if parts[0] == name {
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return true
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}
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}
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return false
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}
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