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|
package main
import (
"bufio"
"encoding/binary"
"fmt"
"io"
"os/exec"
"path/filepath"
)
func btoi(b bool) int {
if b {
return 1
} else {
return 0
}
}
func sendMsg(w io.Writer, data []byte) {
for len(data) != 0 {
written, err := w.Write(data)
if err == io.EOF {
return
}
if err != nil {
panic(err)
}
data = data[written:]
}
}
func sendInt(w io.Writer, i int) {
v := int32(i)
binary.Write(w, binary.LittleEndian, &v)
}
func sendString(w io.Writer, s string) {
sendInt(w, len(s))
sendMsg(w, []byte(s))
}
func sendRunners(w io.Writer, runners []runner) {
sendInt(w, len(runners))
for _, r := range runners {
sendString(w, r.output)
sendString(w, r.cmd)
sendString(w, r.shell)
sendInt(w, btoi(r.echo))
sendInt(w, btoi(r.ignoreError))
}
}
type ParaResult struct {
output string
stdout string
stderr string
status int
signal int
}
func recvInt(r *bufio.Reader) (int, error) {
var v int32
err := binary.Read(r, binary.LittleEndian, &v)
return int(v), err
}
func recvString(r *bufio.Reader) (string, error) {
l, err := recvInt(r)
if err != nil {
return "", err
}
buf := make([]byte, l)
read := 0
for read < len(buf) {
r, err := r.Read(buf[read:])
if err != nil {
return "", err
}
read += r
}
return string(buf), nil
}
func recvResult(r *bufio.Reader) (*ParaResult, error) {
output, err := recvString(r)
if err != nil {
return nil, err
}
stdout, err := recvString(r)
if err != nil {
return nil, err
}
stderr, err := recvString(r)
if err != nil {
return nil, err
}
status, err := recvInt(r)
if err != nil {
return nil, err
}
signal, err := recvInt(r)
if err != nil {
return nil, err
}
return &ParaResult{
output: output,
stdout: stdout,
stderr: stderr,
status: status,
signal: signal,
}, nil
}
type ParaWorker struct {
para *exec.Cmd
paraChan chan *ParaResult
stdin io.WriteCloser
stdout *bufio.Reader
doneChan chan bool
}
func NewParaWorker(paraChan chan *ParaResult) *ParaWorker {
bin := filepath.Join(katiDir, "para")
para := exec.Command(bin, fmt.Sprintf("-j%d", jobsFlag), "--kati")
stdin, err := para.StdinPipe()
if err != nil {
panic(err)
}
stdout, err := para.StdoutPipe()
if err != nil {
panic(err)
}
err = para.Start()
if err != nil {
panic(err)
}
return &ParaWorker{
para: para,
paraChan: paraChan,
stdin: stdin,
stdout: bufio.NewReader(stdout),
doneChan: make(chan bool),
}
}
func (para *ParaWorker) Run() {
for {
r, err := recvResult(para.stdout)
if err == io.EOF {
break
}
if err != nil {
panic(err)
}
para.paraChan <- r
}
para.para.Process.Kill()
para.para.Process.Wait()
para.doneChan <- true
}
func (para *ParaWorker) Wait() {
para.stdin.Close()
<-para.doneChan
}
func (para *ParaWorker) RunCommand(runners []runner) {
sendRunners(para.stdin, runners)
}
|
