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package plugin
import (
"context"
"fmt"
"sync"
"time"
"github.com/hashicorp/go-hclog"
"github.com/hashicorp/go-plugin"
"github.com/oklog/run"
sdk "github.com/hashicorp/vagrant-plugin-sdk"
"github.com/hashicorp/vagrant-plugin-sdk/component"
"github.com/hashicorp/vagrant-plugin-sdk/internal-shared/pluginclient"
)
type Builtin struct {
group run.Group
servers map[string]*plugin.ReattachConfig
log hclog.Logger
cancel context.CancelFunc
ctx context.Context
mu sync.Mutex
}
func NewBuiltins(ctx context.Context, log hclog.Logger) *Builtin {
ctx, cancel := context.WithCancel(ctx)
return &Builtin{
log: log.Named("builtins"),
cancel: cancel,
ctx: ctx,
servers: map[string]*plugin.ReattachConfig{},
}
}
func (b *Builtin) ConnectInfo(name string) (*plugin.ReattachConfig, error) {
// TODO(spox): need to update with this channel and cancelable context
for i := 0; i < 5; i++ {
b.mu.Lock()
r, ok := b.servers[name]
b.mu.Unlock()
if ok {
return r, nil
}
time.Sleep(1 * time.Second)
}
b.log.Error("failed to locate plugin", "name", name, "servers", b.servers)
return nil, fmt.Errorf("unknown builtin plugin %s", name)
}
func (b *Builtin) Add(name string, opts ...sdk.Option) (f PluginRegistration, err error) {
clCh := make(chan struct{})
reCh := make(chan *plugin.ReattachConfig)
cfg := &plugin.ServeTestConfig{
Context: b.ctx,
ReattachConfigCh: reCh,
CloseCh: clCh,
}
// Add our options to keep it running in process
opts = append(opts, sdk.InProcess(cfg), sdk.WithLogger(b.log))
// Spin off a new go routine to get the reattach config
go func() {
rc := <-reCh
b.mu.Lock()
defer b.mu.Unlock()
b.servers[name] = rc
}()
// Add the plugin server to our group
b.group.Add(func() error {
sdk.Main(opts...)
return nil
}, func(err error) {
b.log.Warn("builtin group has exited", "error", err)
b.cancel()
})
return b.Factory(name), nil
}
func (b *Builtin) Start() {
go b.group.Run()
}
func (b *Builtin) Close() {
b.cancel()
}
func (b *Builtin) Factory(name string) PluginRegistration {
return func(log hclog.Logger) (p *Plugin, err error) {
r, err := b.ConnectInfo(name)
if err != nil {
return nil, err
}
config := pluginclient.ClientConfig(b.log.Named(name))
config.Logger = b.log.Named(name)
config.Reattach = r
config.Plugins = config.VersionedPlugins[1]
client := plugin.NewClient(config)
rpcClient, err := client.Client()
if err != nil {
b.log.Error("failed to create rpc client for builtin",
"name", name,
"error", err)
rpcClient.Close()
return nil, err
}
raw, err := rpcClient.Dispense("plugininfo")
if err != nil {
log.Error("error requesting builtin plugin information interface",
"plugin", name,
"error", err)
return
}
info, ok := raw.(component.PluginInfo)
if !ok {
return nil, fmt.Errorf("failed to load builgin plugin information interface \nplugin %v", name)
}
p = &Plugin{
Builtin: false,
Client: rpcClient,
Location: fmt.Sprintf("builtin::%s", name),
Name: info.Name(),
Types: info.ComponentTypes(),
logger: log,
src: client,
}
// Close the rpcClient when plugin is closed
p.Closer(func() error {
return rpcClient.Close()
})
return
}
}
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