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threshold/internal/clientcache/cmd/daemon/command_wrapper.go
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2023-06-11 20:40:47 -04:00
// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: BUSL-1.1
package daemon
import (
"bytes"
"context"
"fmt"
"os"
"os/exec"
"strings"
"github.com/hashicorp/boundary/internal/cmd/base"
"github.com/mitchellh/cli"
)
// CommandWrapper starts the boundary daemon after the command was Run and attempts
// to send the current persona to any running daemon.
type CommandWrapper struct {
cli.Command
ui cli.Ui
}
// Wrap returns a cli.CommandFactory that returns a command wrapped in the CommandWrapper.
func Wrap(ui cli.Ui, wrapped cli.Command) cli.CommandFactory {
return func() (cli.Command, error) {
return &CommandWrapper{
Command: wrapped,
ui: ui,
}, nil
}
}
// Run runs the wrapped command and then attempts to start the boundary daemon and send
// the current persona
func (w *CommandWrapper) Run(args []string) int {
r := w.Command.Run(args)
ctx := context.Background()
if w.startDaemon(ctx) {
w.addPersonaInCache(ctx)
}
return r
}
// startDaemon attempts to start a daemon and returns true if we have attempted to start
// the daemon and either it was successful or it was already running.
func (w *CommandWrapper) startDaemon(ctx context.Context) bool {
cmdName, err := os.Executable()
if err != nil {
w.ui.Error(fmt.Sprintf("unable to find boundary binary for daemon startup: %s", err.Error()))
return false
}
var stdErr bytes.Buffer
cmd := exec.Command(cmdName, "daemon", "start", "-background")
cmd.Stderr = &stdErr
// We use Run here instead of Start because the command spawns off a subprocess and returns.
// We do not want to send the request to add a persona to the cache until we know the daemon
// has started up.
err = cmd.Run()
return err == nil || strings.Contains(stdErr.String(), "already running")
}
// addPersonaInCache runs AddPersonaCommand
func (w *CommandWrapper) addPersonaInCache(ctx context.Context) bool {
c := AddTokenCommand{Command: base.NewCommand(w.ui)}
c.Flags()
apiErr, err := c.Add(ctx)
return err == nil && apiErr == nil
}