lotus/cli/cmd.go
2019-07-09 19:05:44 +02:00

50 lines
1.0 KiB
Go

package cli
import (
"context"
"os"
"os/signal"
"syscall"
"github.com/filecoin-project/go-lotus/api"
"gopkg.in/urfave/cli.v2"
)
const (
metadataContext = "context"
metadataAPI = "api"
)
// ApiConnector returns API instance
type ApiConnector func() api.API
func getApi(ctx *cli.Context) api.API {
return ctx.App.Metadata[metadataAPI].(ApiConnector)()
}
// reqContext returns context for cli execution. Calling it for the first time
// installs SIGTERM handler that will close returned context.
// Not safe for concurrent execution.
func reqContext(cctx *cli.Context) context.Context {
if uctx, ok := cctx.App.Metadata[metadataContext]; ok {
// unchecked cast as if something else is in there
// it is crash worthy either way
return uctx.(context.Context)
}
ctx, done := context.WithCancel(context.Background())
sigChan := make(chan os.Signal, 2)
go func() {
<-sigChan
done()
}()
signal.Notify(sigChan, syscall.SIGTERM, syscall.SIGINT)
return ctx
}
var Commands = []*cli.Command{
chainCmd,
netCmd,
versionCmd,
}