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// +build freebsd openbsd netbsd dragonfly darwin linux solaris
package remote
import (
"errors"
"io/ioutil"
"os"
"github.com/hpcloud/tail"
)
func NewOutputInterceptor() OutputInterceptor {
return &outputInterceptor{}
}
type outputInterceptor struct {
redirectFile *os.File
streamTarget *os.File
intercepting bool
tailer *tail.Tail
doneTailing chan bool
}
func (interceptor *outputInterceptor) StartInterceptingOutput() error {
if interceptor.intercepting {
return errors.New("Already intercepting output!")
}
interceptor.intercepting = true
var err error
interceptor.redirectFile, err = ioutil.TempFile("", "ginkgo-output")
if err != nil {
return err
}
// Call a function in ./syscall_dup_*.go
// If building for everything other than linux_arm64,
// use a "normal" syscall.Dup2(oldfd, newfd) call. If building for linux_arm64 (which doesn't have syscall.Dup2)
// call syscall.Dup3(oldfd, newfd, 0). They are nearly identical, see: http://linux.die.net/man/2/dup3
syscallDup(int(interceptor.redirectFile.Fd()), 1)
syscallDup(int(interceptor.redirectFile.Fd()), 2)
if interceptor.streamTarget != nil {
interceptor.tailer, _ = tail.TailFile(interceptor.redirectFile.Name(), tail.Config{Follow: true})
interceptor.doneTailing = make(chan bool)
go func() {
for line := range interceptor.tailer.Lines {
interceptor.streamTarget.Write([]byte(line.Text + "\n"))
}
close(interceptor.doneTailing)
}()
}
return nil
}
func (interceptor *outputInterceptor) StopInterceptingAndReturnOutput() (string, error) {
if !interceptor.intercepting {
return "", errors.New("Not intercepting output!")
}
interceptor.redirectFile.Close()
output, err := ioutil.ReadFile(interceptor.redirectFile.Name())
os.Remove(interceptor.redirectFile.Name())
interceptor.intercepting = false
if interceptor.streamTarget != nil {
interceptor.tailer.Stop()
interceptor.tailer.Cleanup()
<-interceptor.doneTailing
interceptor.streamTarget.Sync()
}
return string(output), err
}
func (interceptor *outputInterceptor) StreamTo(out *os.File) {
interceptor.streamTarget = out
}
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