148 lines
2.6 KiB
Go
148 lines
2.6 KiB
Go
package register
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import (
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"context"
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"errors"
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"fmt"
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"os"
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"os/exec"
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"github.com/hashicorp/go-hclog"
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"github.com/hashicorp/go-plugin"
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"golang.org/x/sync/errgroup"
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)
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type PluginRegisterBuilder struct {
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plugins map[string]PluginAPI
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}
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func NewPluginRegisterBuilder() *PluginRegisterBuilder {
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return &PluginRegisterBuilder{}
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}
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func (pr *PluginRegisterBuilder) Add(name, path string) *PluginRegisterBuilder {
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pr.plugins[name] = PluginAPI{}
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return pr
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}
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func (pr *PluginRegisterBuilder) Build(ctx context.Context) (*PluginRegister, error) {
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clients := make(map[string]*pluginClientWrapper, 0)
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errgroup, _ := errgroup.WithContext(ctx)
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for name, p := range pr.plugins {
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name, p := name, p
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errgroup.Go(func() error {
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client := plugin.NewClient(&plugin.ClientConfig{
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HandshakeConfig: plugin.HandshakeConfig{
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ProtocolVersion: 1,
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MagicCookieKey: "BASIC_PLUGIN",
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MagicCookieValue: "char",
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},
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Logger: hclog.New(&hclog.LoggerOptions{
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Name: "char",
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Output: os.Stdout,
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Level: hclog.Debug,
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}),
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Cmd: exec.Command("sh", "-c", fmt.Sprintf(
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"(cd ./.char/plugins/%s; go run plugins/%s/main.go)",
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name,
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name,
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)),
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Plugins: map[string]plugin.Plugin{
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name: &p,
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},
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})
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rpcClient, err := client.Client()
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if err != nil {
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return err
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}
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raw, err := rpcClient.Dispense(name)
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if err != nil {
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return err
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}
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pluginApi, ok := raw.(Plugin)
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if !ok {
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return errors.New("could not cast as plugin")
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}
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clients[name] = &pluginClientWrapper{
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plugin: pluginApi,
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client: client,
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}
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return nil
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})
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}
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err := errgroup.Wait()
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if err != nil {
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return nil, err
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}
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return &PluginRegister{
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clients: clients,
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}, nil
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}
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// ---
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type pluginClientWrapper struct {
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plugin Plugin
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client *plugin.Client
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}
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func (pcw *pluginClientWrapper) Close() {
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pcw.client.Kill()
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}
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// ---
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type PluginRegister struct {
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clients map[string]*pluginClientWrapper
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}
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func (pr *PluginRegister) Close() error {
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errgroup, _ := errgroup.WithContext(context.Background())
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for _, c := range pr.clients {
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c := c
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errgroup.Go(func() error {
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c.Close()
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return nil
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})
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}
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if err := errgroup.Wait(); err != nil {
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return err
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}
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return nil
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}
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func (pr *PluginRegister) About(ctx context.Context) (map[string]string, error) {
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list := make(map[string]string, len(pr.clients))
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errgroup, ctx := errgroup.WithContext(ctx)
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for n, c := range pr.clients {
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n, c := n, c
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errgroup.Go(func() error {
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about := c.plugin.About()
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list[n] = about
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return nil
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})
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}
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if err := errgroup.Wait(); err != nil {
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return nil, err
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}
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return list, nil
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}
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