chore: consolidate tailing aws logs to use the Go SDK

[Eduardo Lopez]

We should phase out shelling out to external dependencies and instead directly use Go clients + sdks. One particular example is we have 2 paths for tailing aws logs:

• aws cli --

  happy/pkg/orchestrator/orchestrator.go

  Lines 229 to 255 in bf5541e

   func (s *Orchestrator) Logs(stackName string, service string, since string) error { 
   	// TODO get logs path from ECS instead of generating 
   	logPrefix := s.backend.Conf().LogGroupPrefix() 
   	logPath := fmt.Sprintf("%s/%s/%s", logPrefix, stackName, service) 
    
   	awsProfile := s.backend.Conf().AwsProfile() 
   	regionName := "us-west-2" 
   	awsArgs := []string{"aws", "--profile", awsProfile, "--region", regionName, "logs", "tail", "--since", since, "--follow", logPath} 
    
   	awsCmd, err := exec.LookPath("aws") 
   	if err != nil { 
   		return errors.Wrap(err, "failed to locate the AWS cli") 
   	} 
    
   	cmd := &exec.Cmd{ 
   		Path:   awsCmd, 
   		Args:   awsArgs, 
   		Stderr: os.Stderr, 
   		Stdout: os.Stdout, 
   	} 
   	log.Println(cmd) 
   	if err := s.executor.Run(cmd); err != nil { 
   		return errors.Wrap(err, "failed to get logs from AWS") 
   	} 
    
   	return nil 
   } 

• go sdk --

  happy/pkg/backend/aws/logs.go

  Lines 1 to 30 in bf5541e

   package aws 
    
   import ( 
   	"context" 
    
   	cwlv2 "github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs" 
   ) 
    
   type GetLogsFunc func(*cwlv2.GetLogEventsOutput, error) error 
    
   func (b *Backend) getLogs( 
   	ctx context.Context, 
   	input *cwlv2.GetLogEventsInput, 
   	f GetLogsFunc, 
   ) error { 
   	paginator := cwlv2.NewGetLogEventsPaginator( 
   		b.cwlGetLogEventsAPIClient, 
   		input, 
   	) 
   	for paginator.HasMorePages() { 
   		err := f(paginator.NextPage(ctx)) 
   		if isStop(err) { 
   			return nil 
   		} 
   		if err != nil { 
   			return err 
   		} 
   	} 
   	return nil 
   } 

We should get rid of the aws cli path and replace it with the Go SDK path