/
install.go
195 lines (169 loc) · 5.36 KB
/
install.go
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package plugin
import (
"bufio"
"errors"
"fmt"
"strings"
distreference "github.com/docker/distribution/reference"
"github.com/docker/docker/api/types"
registrytypes "github.com/docker/docker/api/types/registry"
"github.com/docker/docker/cli"
"github.com/docker/docker/cli/command"
"github.com/docker/docker/cli/command/image"
"github.com/docker/docker/pkg/jsonmessage"
"github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/spf13/cobra"
"golang.org/x/net/context"
)
type pluginOptions struct {
name string
alias string
grantPerms bool
disable bool
args []string
}
func newInstallCommand(dockerCli *command.DockerCli) *cobra.Command {
var options pluginOptions
cmd := &cobra.Command{
Use: "install [OPTIONS] PLUGIN [KEY=VALUE...]",
Short: "Install a plugin",
Args: cli.RequiresMinArgs(1),
RunE: func(cmd *cobra.Command, args []string) error {
options.name = args[0]
if len(args) > 1 {
options.args = args[1:]
}
return runInstall(dockerCli, options)
},
}
flags := cmd.Flags()
flags.BoolVar(&options.grantPerms, "grant-all-permissions", false, "Grant all permissions necessary to run the plugin")
flags.BoolVar(&options.disable, "disable", false, "Do not enable the plugin on install")
flags.StringVar(&options.alias, "alias", "", "Local name for plugin")
command.AddTrustedFlags(flags, true)
return cmd
}
func getRepoIndexFromUnnormalizedRef(ref distreference.Named) (*registrytypes.IndexInfo, error) {
named, err := reference.ParseNamed(ref.Name())
if err != nil {
return nil, err
}
repoInfo, err := registry.ParseRepositoryInfo(named)
if err != nil {
return nil, err
}
return repoInfo.Index, nil
}
type pluginRegistryService struct {
registry.Service
}
func (s pluginRegistryService) ResolveRepository(name reference.Named) (repoInfo *registry.RepositoryInfo, err error) {
repoInfo, err = s.Service.ResolveRepository(name)
if repoInfo != nil {
repoInfo.Class = "plugin"
}
return
}
func newRegistryService() registry.Service {
return pluginRegistryService{
Service: registry.NewService(registry.ServiceOptions{V2Only: true}),
}
}
func runInstall(dockerCli *command.DockerCli, opts pluginOptions) error {
// Parse name using distribution reference package to support name
// containing both tag and digest. Names with both tag and digest
// will be treated by the daemon as a pull by digest with
// an alias for the tag (if no alias is provided).
ref, err := distreference.ParseNamed(opts.name)
if err != nil {
return err
}
alias := ""
if opts.alias != "" {
aref, err := reference.ParseNamed(opts.alias)
if err != nil {
return err
}
aref = reference.WithDefaultTag(aref)
if _, ok := aref.(reference.NamedTagged); !ok {
return fmt.Errorf("invalid name: %s", opts.alias)
}
alias = aref.String()
}
ctx := context.Background()
index, err := getRepoIndexFromUnnormalizedRef(ref)
if err != nil {
return err
}
remote := ref.String()
_, isCanonical := ref.(distreference.Canonical)
if command.IsTrusted() && !isCanonical {
if alias == "" {
alias = ref.String()
}
var nt reference.NamedTagged
named, err := reference.ParseNamed(ref.Name())
if err != nil {
return err
}
if tagged, ok := ref.(distreference.Tagged); ok {
nt, err = reference.WithTag(named, tagged.Tag())
if err != nil {
return err
}
} else {
named = reference.WithDefaultTag(named)
nt = named.(reference.NamedTagged)
}
trusted, err := image.TrustedReference(ctx, dockerCli, nt, newRegistryService())
if err != nil {
return err
}
remote = trusted.String()
}
authConfig := command.ResolveAuthConfig(ctx, dockerCli, index)
encodedAuth, err := command.EncodeAuthToBase64(authConfig)
if err != nil {
return err
}
registryAuthFunc := command.RegistryAuthenticationPrivilegedFunc(dockerCli, index, "plugin install")
options := types.PluginInstallOptions{
RegistryAuth: encodedAuth,
RemoteRef: remote,
Disabled: opts.disable,
AcceptAllPermissions: opts.grantPerms,
AcceptPermissionsFunc: acceptPrivileges(dockerCli, opts.name),
// TODO: Rename PrivilegeFunc, it has nothing to do with privileges
PrivilegeFunc: registryAuthFunc,
Args: opts.args,
}
responseBody, err := dockerCli.Client().PluginInstall(ctx, alias, options)
if err != nil {
if strings.Contains(err.Error(), "target is image") {
return errors.New(err.Error() + " - Use `docker image pull`")
}
return err
}
defer responseBody.Close()
if err := jsonmessage.DisplayJSONMessagesToStream(responseBody, dockerCli.Out(), nil); err != nil {
return err
}
fmt.Fprintf(dockerCli.Out(), "Installed plugin %s\n", opts.name) // todo: return proper values from the API for this result
return nil
}
func acceptPrivileges(dockerCli *command.DockerCli, name string) func(privileges types.PluginPrivileges) (bool, error) {
return func(privileges types.PluginPrivileges) (bool, error) {
fmt.Fprintf(dockerCli.Out(), "Plugin %q is requesting the following privileges:\n", name)
for _, privilege := range privileges {
fmt.Fprintf(dockerCli.Out(), " - %s: %v\n", privilege.Name, privilege.Value)
}
fmt.Fprint(dockerCli.Out(), "Do you grant the above permissions? [y/N] ")
reader := bufio.NewReader(dockerCli.In())
line, _, err := reader.ReadLine()
if err != nil {
return false, err
}
return strings.ToLower(string(line)) == "y", nil
}
}