7312c4b8bb
Allow full configuration of external plugins via a JSON document. Signed-off-by: David Calavera <david.calavera@gmail.com>
105 lines
2 KiB
Go
105 lines
2 KiB
Go
package plugins
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import (
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"encoding/json"
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"errors"
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"fmt"
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"io/ioutil"
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"net/url"
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"os"
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"path/filepath"
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"strings"
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)
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const defaultLocalRegistry = "/usr/share/docker/plugins"
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var (
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ErrNotFound = errors.New("Plugin not found")
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)
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type Registry interface {
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Plugins() ([]*Plugin, error)
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Plugin(name string) (*Plugin, error)
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}
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type LocalRegistry struct {
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path string
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}
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func newLocalRegistry(path string) *LocalRegistry {
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if len(path) == 0 {
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path = defaultLocalRegistry
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}
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return &LocalRegistry{path}
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}
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func (l *LocalRegistry) Plugin(name string) (*Plugin, error) {
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filepath := filepath.Join(l.path, name)
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specpath := filepath + ".spec"
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if fi, err := os.Stat(specpath); err == nil {
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return readPluginSpecInfo(specpath, fi)
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}
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socketpath := filepath + ".sock"
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if fi, err := os.Stat(socketpath); err == nil {
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return readPluginSocketInfo(socketpath, fi)
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}
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jsonpath := filepath + ".json"
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if _, err := os.Stat(jsonpath); err == nil {
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return readPluginJSONInfo(name, jsonpath)
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}
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return nil, ErrNotFound
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}
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func readPluginSpecInfo(path string, fi os.FileInfo) (*Plugin, error) {
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name := strings.Split(fi.Name(), ".")[0]
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content, err := ioutil.ReadFile(path)
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if err != nil {
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return nil, err
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}
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addr := strings.TrimSpace(string(content))
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u, err := url.Parse(addr)
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if err != nil {
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return nil, err
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}
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if len(u.Scheme) == 0 {
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return nil, fmt.Errorf("Unknown protocol")
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}
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return newLocalPlugin(name, addr), nil
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}
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func readPluginSocketInfo(path string, fi os.FileInfo) (*Plugin, error) {
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name := strings.Split(fi.Name(), ".")[0]
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if fi.Mode()&os.ModeSocket == 0 {
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return nil, fmt.Errorf("%s is not a socket", path)
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}
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return newLocalPlugin(name, "unix://"+path), nil
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}
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func readPluginJSONInfo(name, path string) (*Plugin, error) {
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f, err := os.Open(path)
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if err != nil {
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return nil, err
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}
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defer f.Close()
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var p Plugin
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if err := json.NewDecoder(f).Decode(&p); err != nil {
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return nil, err
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}
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p.Name = name
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if len(p.TLSConfig.CAFile) == 0 {
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p.TLSConfig.InsecureSkipVerify = true
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}
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return &p, nil
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}
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