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exec.go
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exec.go
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package instance
import (
"context"
"errors"
"io"
"strings"
"connectrpc.com/connect"
"github.com/moby/term"
"github.com/rigdev/rig-go-api/api/v1/capsule"
"github.com/rigdev/rig/cmd/common"
capsule_cmd "github.com/rigdev/rig/cmd/rig/cmd/capsule"
"github.com/rigdev/rig/cmd/rig/cmd/flags"
"github.com/spf13/cobra"
)
var defaultEscapeKeys = []byte{16, 17}
func listen(
stream *connect.BidiStreamForClient[capsule.ExecuteRequest, capsule.ExecuteResponse],
stdout, stderr io.Writer,
) chan error {
doneChan := make(chan error, 1)
go func() {
for {
resp, err := stream.Receive()
if err != nil {
doneChan <- err
return
}
switch v := resp.Response.(type) {
case *capsule.ExecuteResponse_Stdout:
stdout.Write(v.Stdout.GetData())
case *capsule.ExecuteResponse_Stderr:
stderr.Write(v.Stderr.GetData())
}
}
}()
return doneChan
}
func (c *Cmd) exec(ctx context.Context, cmd *cobra.Command, args []string) error {
arg := ""
if len(args) > 1 {
arg = args[1]
}
instance, err := c.provideInstanceID(ctx, capsule_cmd.CapsuleID, arg, cmd.ArgsLenAtDash())
if err != nil {
return err
}
command, arguments := c.parseArgs(cmd, args)
var resize *capsule.ExecuteRequest_Resize
var ttyStruct *Tty
if tty {
ttyStruct = NewTty()
width, height := ttyStruct.GetTtySize()
resize = &capsule.ExecuteRequest_Resize{
Height: height,
Width: width,
}
}
start := &capsule.ExecuteRequest{
Request: &capsule.ExecuteRequest_Start_{
Start: &capsule.ExecuteRequest_Start{
CapsuleId: capsule_cmd.CapsuleID,
InstanceId: instance,
Command: command,
Arguments: arguments,
Tty: resize,
Interactive: interactive,
},
},
ProjectId: flags.GetProject(c.Scope),
EnvironmentId: flags.GetEnvironment(c.Scope),
}
stream := c.Rig.Capsule().Execute(ctx)
defer func() {
if tty {
err := ttyStruct.RestoreTerminal()
if err != nil {
cmd.Println(err)
}
}
//nolint:errcheck
stream.CloseRequest()
//nolint:errcheck
stream.CloseResponse()
}()
err = stream.Send(start)
if err != nil {
return err
}
stdinClose, stdout, stderr := term.StdStreams()
var stdin io.Reader = stdinClose
if interactive {
outChan := listen(stream, stdout, stderr)
inChan := make(chan error, 1)
interruptChan := make(chan error, 1)
if ttyStruct != nil {
stdin = term.NewEscapeProxy(stdin, defaultEscapeKeys)
err := ttyStruct.SetTtyTerminal()
if err != nil {
return err
}
err = ttyStruct.MonitorSize()
if err != nil {
return err
}
go func() {
for size := range ttyStruct.resizeChan {
err := stream.Send(&capsule.ExecuteRequest{
Request: &capsule.ExecuteRequest_Resize_{
Resize: &capsule.ExecuteRequest_Resize{
Height: size.height,
Width: size.width,
},
},
})
if err != nil {
inChan <- err
return
}
}
}()
err = ttyStruct.MonitorInterrupt(interruptChan)
if err != nil {
return err
}
}
go func() {
buf := make([]byte, 4096)
for {
n, err := stdin.Read(buf)
if n > 0 {
err := stream.Send(&capsule.ExecuteRequest{
Request: &capsule.ExecuteRequest_Stdin{
Stdin: &capsule.StreamData{
Data: buf[:n],
},
},
})
if err != nil {
inChan <- err
return
}
}
if errors.Is(err, io.EOF) {
err := stream.Send(&capsule.ExecuteRequest{
Request: &capsule.ExecuteRequest_Stdin{
Stdin: &capsule.StreamData{
Data: buf[:n],
Closed: true,
},
},
})
if err != nil {
inChan <- err
return
}
return
} else if err != nil {
inChan <- err
return
}
}
}()
select {
case err := <-interruptChan:
return err
case err := <-outChan:
if errors.Is(err, io.EOF) {
return nil
} else {
return err
}
case err := <-inChan:
if errors.Is(err, io.EOF) {
// in is finished wait for out to finish.
select {
case err := <-outChan:
return err
case err := <-interruptChan:
return err
}
} else {
return err
}
}
} else {
outChan := listen(stream, stdout, stderr)
err := <-outChan
if errors.Is(err, io.EOF) {
return nil
}
return err
}
}
func (c *Cmd) parseArgs(cmd *cobra.Command, args []string) (string, []string) {
var command string
var arguments []string
var err error
if cmd.ArgsLenAtDash() == -1 || len(args) <= 1 {
command, err = c.Prompter.Input("command", common.ValidateNonEmptyOpt)
if err != nil {
return "", nil
}
argString, err := c.Prompter.Input("Arguments", common.ValidateAllOpt)
if err != nil {
return "", nil
}
if argString != "" {
arguments = strings.Split(argString, " ")
}
} else {
command = args[cmd.ArgsLenAtDash()]
arguments = args[cmd.ArgsLenAtDash()+1:]
}
return command, arguments
}