78 lines
1.4 KiB
Go
78 lines
1.4 KiB
Go
package plugins
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import (
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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 readPluginInfo(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 readPluginInfo(socketpath, fi)
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}
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return nil, ErrNotFound
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}
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func readPluginInfo(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 &Plugin{
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Name: name,
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Addr: "unix://" + path,
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}, nil
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}
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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 &Plugin{
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Name: name,
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Addr: addr,
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}, nil
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}
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