func (w *Worker) ExecBin(binPath string, args []string, maxRunTime int64) (string, error) {
var cmd *exec.Cmd
var stdout bytes.Buffer
var stderr bytes.Buffer
var err error
if len(args) == 0 {
cmd = exec.Command(binPath)
} else {
cmd = exec.Command(binPath, args...)
}
cmd.Stdout = &stdout
cmd.Stderr = &stderr
cmd.Start() // attention!
err, _ = w.CmdRunWithTimeout(cmd,
time.Duration(maxRunTime)*time.Second,
)
if err != nil {
return "", err
}
if len(stderr.String()) != 0 {
errMsg := strings.TrimRight(stderr.String(), "\n")
return "", errors.NewError(errMsg)
}
return strings.TrimRight(stdout.String(), "\n"), nil
}
func source(dir, from, to string) <-chan string {
var cmd *exec.Cmd
if to == "" {
cmd = exec.Command("git", "-C", dir, "log", `--pretty=format:hash: %H%n-----%nauthor: %an <%ae>%n-----%nrawSubject: %s%n-----%nrawBody: %b%n-----%nEND-COMMIT%n`, from)
} else {
cmd = exec.Command("git", "-C", dir, "log", `--pretty=format:hash: %H%n-----%nauthor: %an <%ae>%n-----%nrawSubject: %s%n-----%nrawBody: %b%n-----%nEND-COMMIT%n`, to+".."+from)
}
outputChannel := make(chan string)
output, err := cmd.StdoutPipe()
if err != nil {
panic(err)
}
err = cmd.Start()
if err != nil {
log.Fatal(err)
}
go func() {
scanner := bufio.NewScanner(output)
for scanner.Scan() {
outputChannel <- scanner.Text()
}
defer output.Close()
close(outputChannel)
if err := scanner.Err(); err != nil {
log.Fatal(err)
}
}()
return outputChannel
}
func execCommand(cmd *exec.Cmd) error {
cmdReader, err := cmd.StdoutPipe()
if err != nil {
fmt.Fprintln(os.Stderr, "Error creating StdoutPipe for Cmd", err)
return err
}
scanner := bufio.NewScanner(cmdReader)
go func() {
for scanner.Scan() {
fmt.Printf("docker build out | %s\n", scanner.Text())
}
}()
var stderr bytes.Buffer
cmd.Stdout = os.Stdout
cmd.Stderr = &stderr
err = cmd.Start()
if err != nil {
fmt.Printf("docker build out | %s\n", stderr.String())
return err
}
err = cmd.Wait()
if err != nil {
fmt.Printf("docker build out | %s\n", stderr.String())
return err
}
return err
}
// send produces a binary diff stream and passes it to cont
func send(repo, commit string, cont func(io.Reader) error) error {
parent := GetMeta(path.Join(repo, commit), "parent")
var cmd *exec.Cmd
if parent == "" {
cmd = exec.Command("btrfs", "send", FilePath(path.Join(repo, commit)))
} else {
cmd = exec.Command("btrfs", "send", "-p", FilePath(path.Join(repo, parent)), FilePath(path.Join(repo, commit)))
}
stdin, stdout := io.Pipe()
stderr := bytes.NewBuffer(nil)
cmd.Stdout = stdout
if err := cmd.Start(); err != nil {
return err
}
errC := make(chan error, 1)
go func() {
errC <- cont(stdin)
}()
waitErr := cmd.Wait()
closeErr := stdout.Close()
if waitErr != nil {
return fmt.Errorf("%s %s", waitErr.Error(), stderr.String())
}
if closeErr != nil {
return closeErr
}
return <-errC
}
func (this *Start) reloadHAproxy() (err error) {
var cmd *exec.Cmd = nil
waitStartCh := make(chan struct{})
if this.starting {
log.Info("haproxy starting")
cmd = exec.Command(this.command, "-f", configFile) // TODO use absolute path
this.starting = false
go func() {
<-waitStartCh
log.Info("haproxy started")
if err := cmd.Wait(); err != nil {
log.Error("haproxy: %v", err)
}
}()
} else {
shellScript := fmt.Sprintf("%s -f %s/%s -sf `cat %s/%s`",
this.command, this.root, configFile, this.root, haproxyPidFile)
log.Info("haproxy reloading: %s", shellScript)
cmd = exec.Command("/bin/sh", "-c", shellScript)
go func() {
<-waitStartCh
log.Info("haproxy reloaded")
if err := cmd.Wait(); err != nil {
log.Error("haproxy: %v", err)
}
}()
}
if err = cmd.Start(); err == nil {
waitStartCh <- struct{}{}
}
return err
}
// RunCommandWithStdoutStderr execs a command and returns its output.
func RunCommandWithStdoutStderr(cmd *exec.Cmd) (bytes.Buffer, bytes.Buffer, error) {
var stdout, stderr bytes.Buffer
stderrPipe, err := cmd.StderrPipe()
stdoutPipe, err := cmd.StdoutPipe()
cmd.Env = os.Environ()
if err != nil {
fmt.Println("error at io pipes")
}
err = cmd.Start()
if err != nil {
fmt.Println("error at command start")
}
go func() {
io.Copy(&stdout, stdoutPipe)
fmt.Println(stdout.String())
}()
go func() {
io.Copy(&stderr, stderrPipe)
fmt.Println(stderr.String())
}()
time.Sleep(2000 * time.Millisecond)
err = cmd.Wait()
if err != nil {
fmt.Println("error at command wait")
}
return stdout, stderr, err
}
func runTest(test test) (passed bool, err error) {
prog := path.Join(*buildDir, test[0])
args := test[1:]
var cmd *exec.Cmd
if *useValgrind {
cmd = valgrindOf(false, prog, args...)
} else {
cmd = exec.Command(prog, args...)
}
var stdoutBuf bytes.Buffer
cmd.Stdout = &stdoutBuf
cmd.Stderr = os.Stderr
if err := cmd.Start(); err != nil {
return false, err
}
if err := cmd.Wait(); err != nil {
return false, err
}
// Account for Windows line-endings.
stdout := bytes.Replace(stdoutBuf.Bytes(), []byte("\r\n"), []byte("\n"), -1)
if bytes.HasSuffix(stdout, []byte("PASS\n")) &&
(len(stdout) == 5 || stdout[len(stdout)-6] == '\n') {
return true, nil
}
return false, nil
}
/*
Start starts the passed-in *exec.Cmd command. It wraps the command in a *gexec.Session.
The session pipes the command's stdout and stderr to two *gbytes.Buffers available as properties on the session: session.Out and session.Err.
These buffers can be used with the gbytes.Say matcher to match against unread output:
Ω(session.Out).Should(gbytes.Say("foo-out"))
Ω(session.Err).Should(gbytes.Say("foo-err"))
In addition, Session satisfies the gbytes.BufferProvider interface and provides the stdout *gbytes.Buffer. This allows you to replace the first line, above, with:
Ω(session).Should(gbytes.Say("foo-out"))
When outWriter and/or errWriter are non-nil, the session will pipe stdout and/or stderr output both into the session *gybtes.Buffers and to the passed-in outWriter/errWriter.
This is useful for capturing the process's output or logging it to screen. In particular, when using Ginkgo it can be convenient to direct output to the GinkgoWriter:
session, err := Start(command, GinkgoWriter, GinkgoWriter)
This will log output when running tests in verbose mode, but - otherwise - will only log output when a test fails.
The session wrapper is responsible for waiting on the *exec.Cmd command. You *should not* call command.Wait() yourself.
Instead, to assert that the command has exited you can use the gexec.Exit matcher:
Ω(session).Should(gexec.Exit())
When the session exits it closes the stdout and stderr gbytes buffers. This will short circuit any
Eventuallys waiting fo the buffers to Say something.
*/
func Start(command *exec.Cmd, outWriter io.Writer, errWriter io.Writer) (*Session, error) {
exited := make(chan struct{})
session := &Session{
Command: command,
Out: gbytes.NewBuffer(),
Err: gbytes.NewBuffer(),
Exited: exited,
lock: &sync.Mutex{},
exitCode: -1,
}
var commandOut, commandErr io.Writer
commandOut, commandErr = session.Out, session.Err
if outWriter != nil && !reflect.ValueOf(outWriter).IsNil() {
commandOut = io.MultiWriter(commandOut, outWriter)
}
if errWriter != nil && !reflect.ValueOf(errWriter).IsNil() {
commandErr = io.MultiWriter(commandErr, errWriter)
}
command.Stdout = commandOut
command.Stderr = commandErr
err := command.Start()
if err == nil {
go session.monitorForExit(exited)
}
return session, err
}
// timedCommand executes the given command, terminating it forcefully
// if it is still running after the given timeout elapses.
func (e *executor) timedCommand(timeout time.Duration, opts opts, command *exec.Cmd) error {
// Make the process of this command a new process group leader
// to facilitate clean up of processes that time out.
command.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
// Kill this process group explicitly when receiving SIGTERM
// or SIGINT signals.
sigchan := make(chan os.Signal, 1)
signal.Notify(sigchan, syscall.SIGTERM, syscall.SIGQUIT, syscall.SIGINT)
go func() {
<-sigchan
e.terminateProcessGroup(opts, command)
}()
if err := command.Start(); err != nil {
e.printf(e.verboseStdout(opts), "FAILED: %v", err)
return err
}
done := make(chan error, 1)
go func() {
done <- command.Wait()
}()
select {
case <-time.After(timeout):
// The command has timed out.
e.terminateProcessGroup(opts, command)
// Allow goroutine to exit.
<-done
e.printf(e.verboseStdout(opts), "TIMED OUT")
return commandTimedOutErr
case err := <-done:
e.printf(e.verboseStdout(opts), okOrFailed(err))
return err
}
}
func start(c *exec.Cmd) (pty *os.File, err error) {
pty, tty, err := open()
if err != nil {
return nil, err
}
defer tty.Close()
err = setEcho(pty, false)
if err != nil {
return nil, err
}
err = setEcho(tty, false)
if err != nil {
return nil, err
}
c.Stdout = tty
c.Stdin = tty
c.Stderr = tty
if c.SysProcAttr == nil {
c.SysProcAttr = &syscall.SysProcAttr{}
}
c.SysProcAttr.Setctty = true
c.SysProcAttr.Setsid = true
err = c.Start()
if err != nil {
pty.Close()
return nil, err
}
return pty, err
}
func CmdStream(cmd *exec.Cmd) (io.Reader, error) {
stdout, err := cmd.StdoutPipe()
if err != nil {
return nil, err
}
stderr, err := cmd.StderrPipe()
if err != nil {
return nil, err
}
pipeR, pipeW := io.Pipe()
go func() {
_, err := io.Copy(pipeW, stdout)
if err != nil {
pipeW.CloseWithError(err)
}
errText, e := ioutil.ReadAll(stderr)
if e != nil {
errText = []byte("(...couldn't fetch stderr: " + e.Error() + ")")
}
if err := cmd.Wait(); err != nil {
// FIXME: can this block if stderr outputs more than the size of StderrPipe()'s buffer?
pipeW.CloseWithError(errors.New(err.Error() + ": " + string(errText)))
} else {
pipeW.Close()
}
}()
if err := cmd.Start(); err != nil {
return nil, err
}
return pipeR, nil
}
// cmdTimeout runs the command c and returns a timeout if it doesn't complete
// after time t. If a timeout occurs, cmdTimeout will kill the process. Blocks
// until the process terminates.
func cmdTimeout(c *exec.Cmd, t time.Duration) error {
log.Debug("cmdTimeout: %v", c)
start := time.Now()
if err := c.Start(); err != nil {
return fmt.Errorf("cmd start: %v", err)
}
done := make(chan error)
go func() {
done <- c.Wait()
close(done)
}()
select {
case <-time.After(t):
log.Debug("killing cmd %v", c)
err := c.Process.Kill()
// Receive from done so that we don't leave the goroutine hanging
err2 := <-done
// Kill error takes precedence as they should be unexpected
if err != nil {
return err
}
return err2
case err := <-done:
log.Debug("cmd %v completed in %v", c, time.Now().Sub(start))
return err
}
}
func (cmd *execCmd) Run(fs *flag.FlagSet) {
cmd.InitClient(false)
cmd.exitStatus = 0
cmd.ValidateFlags()
args := fs.Args()
if len(args) < 1 {
fmt.Println("no command to exec")
os.Exit(1)
return
}
var c *exec.Cmd
if len(args) > 2 {
c = exec.Command(args[0], args[1:]...)
} else {
c = exec.Command(args[0])
}
attachCmd(c)
err := c.Start()
if err != nil {
panic(err)
}
cmd.RegisterWithExitHook(map[string]string(*cmd.services), false)
exitCh := exitStatusCh(c)
cmd.exitStatus = int(<-exitCh)
close(cmd.exitSignalCh)
time.Sleep(time.Second)
}
func main() {
defer func() {
if r := recover(); r != nil {
var err string
switch r.(type) {
case string:
err = r.(string)
break
case error:
err = r.(error).Error()
default:
err = fmt.Sprintf("%v", err)
}
url := fmt.Sprintf("http://stackoverflow.com/search?q=[go]%%20%s", url.QueryEscape(err))
var cmd *exec.Cmd
switch runtime.GOOS {
case "windows":
cmd = exec.Command("cmd", "/c", "start", url)
break
case "darwin":
cmd = exec.Command("open", url)
break
default:
cmd = exec.Command("xdg-open", url)
break
}
cmd.Start()
}
}()
// naughty code here
}
// Publish prints the result of a check to stdout.
func (p *ExecPublisher) Publish(result *CheckResult) error {
var cmd *exec.Cmd
if len(p.cmd) > 1 {
cmd = exec.Command(p.cmd[0], p.cmd[1:]...)
} else {
cmd = exec.Command(p.cmd[0])
}
var b bytes.Buffer
cmd.Stdout = &b
cmd.Stderr = &b
stdin, err := cmd.StdinPipe()
if err != nil {
return err
}
if err = cmd.Start(); err != nil {
p.log.Error("Exec failed", "error", err)
return err
}
if err = p.stdinTemplate.Execute(stdin, result); err != nil {
p.log.Error("Failed to write template data to stdin", "error", err)
return err
}
stdin.Close()
if err = cmd.Wait(); err != nil {
p.log.Error("Exec failed", "error", err, "output", b.String())
return err
}
return nil
}
func (run execCmdRunner) runCmd(cmd *exec.Cmd) (stdout, stderr string, err error) {
cmdString := strings.Join(cmd.Args, " ")
run.logger.Debug("Cmd Runner", "Running command: %s", cmdString)
stdoutWriter := bytes.NewBufferString("")
stderrWriter := bytes.NewBufferString("")
cmd.Stdout = stdoutWriter
cmd.Stderr = stderrWriter
err = cmd.Start()
if err != nil {
err = bosherr.WrapError(err, "Starting command %s", cmdString)
return
}
err = cmd.Wait()
stdout = string(stdoutWriter.Bytes())
stderr = string(stderrWriter.Bytes())
run.logger.Debug("Cmd Runner", "Stdout: %s", stdout)
run.logger.Debug("Cmd Runner", "Stderr: %s", stderr)
run.logger.Debug("Cmd Runner", "Successful: %t", err == nil)
if err != nil {
err = bosherr.WrapError(err, "Running command: '%s', stdout: '%s', stderr: '%s'", cmdString, stdout, stderr)
}
return
}
func RunAndListen(cmd *exec.Cmd, fn func(s string)) error {
var stderr bytes.Buffer
cmd.Stderr = &stderr
r, err := cmd.StdoutPipe()
if err != nil {
return fmt.Errorf("%s: %s", err, stderr.String())
}
scanner := bufio.NewScanner(r)
go func() {
for scanner.Scan() {
fn(scanner.Text())
}
}()
err = cmd.Start()
if err != nil {
return fmt.Errorf("%s: %s", err, stderr.String())
}
err = cmd.Wait()
if err != nil {
return fmt.Errorf("%s: %s", err, stderr.String())
}
return nil
}
// execute one command
func execCommand(cmd *exec.Cmd, mes message.ToWork, reportChan chan message.Report) {
logger.Infof("Start executing one command : %v", cmd)
go func() {
stdout, errPipe1 := cmd.StdoutPipe()
stderr, errPipe2 := cmd.StderrPipe()
errCmd := cmd.Start()
hasErr, errMes := hasError(errPipe1, errPipe2, errCmd)
if hasErr {
reportChan <- message.Report{mes.JobId, message.FAILED, errMes}
} else {
multi := io.MultiReader(stdout, stderr)
in := bufio.NewScanner(multi)
// todo see if a more efficient way is possible
buf := []string{}
for in.Scan() {
s := in.Text()
buf = append(buf, s)
if len(buf) > 4 {
buf = consumeBuffer(buf, mes.JobId, reportChan)
}
}
// finish the rest of the buffer
consumeBuffer(buf, mes.JobId, reportChan)
if inErr := in.Err(); inErr != nil {
reportChan <- message.Report{mes.JobId, message.FAILED, []string{inErr.Error()}}
} else {
pushEndReport(cmd, mes.JobId, reportChan)
}
}
}()
}
// runInContext runs a command in the context of a Vagrantfile (from the same dir)
func runInContext(cmd *exec.Cmd) error {
// run the command from ~/.nanobox/apps/<config.App>. Running the command from
// the directory that contains the Vagratfile ensure that the command can
// atleast run (especially in cases like 'create' where a VM hadn't been created
// yet, and a UUID isn't available)
setContext(config.AppDir)
//
handleCMDout(cmd)
// start the command; we need this to 'fire and forget' so that we can manually
// capture and modify the commands output above
if err := cmd.Start(); err != nil {
return err
}
// wait for the command to complete/fail and exit, giving us a chance to scan
// the output
if err := cmd.Wait(); err != nil {
return err
}
// switch back to project dir
setContext(config.CWDir)
return nil
}
func ExecCmd(path string, arg1 string, args ...string) (string, error) {
var cmd *exec.Cmd
argsNew := make([]string, len(args))
for i, a := range args {
argsNew[i] = a
}
cmd = exec.Command(arg1, argsNew...)
cmd.Dir = path
// cmd.stdin = os.Stdin
stderr, err := cmd.StderrPipe()
if err != nil {
log.Fatal("stderr err %v", err)
}
stdout, err := cmd.StdoutPipe()
if err != nil {
log.Fatalf("stdout err %v", err)
}
var retStr string
err = cmd.Start()
if err != nil {
retb, _ := ioutil.ReadAll(stderr)
retStr = string(retb)
// stdoutReader.ReadRune()
} else {
retb, _ := ioutil.ReadAll(stdout)
retStr = string(retb)
}
return retStr, err
}
// cmdStream executes a command, and returns its stdout as a stream.
// If the command fails to run or doesn't complete successfully, an error
// will be returned, including anything written on stderr.
func cmdStream(cmd *exec.Cmd, input io.Reader) (io.ReadCloser, <-chan struct{}, error) {
chdone := make(chan struct{})
cmd.Stdin = input
pipeR, pipeW := io.Pipe()
cmd.Stdout = pipeW
var errBuf bytes.Buffer
cmd.Stderr = &errBuf
// Run the command and return the pipe
if err := cmd.Start(); err != nil {
return nil, nil, err
}
// Copy stdout to the returned pipe
go func() {
if err := cmd.Wait(); err != nil {
pipeW.CloseWithError(fmt.Errorf("%s: %s", err, errBuf.String()))
} else {
pipeW.Close()
}
close(chdone)
}()
return pipeR, chdone, nil
}
func RunWithEnvAndWd(command string, args []string, env []string, wd string) (proc *exec.Cmd, err error) {
//log.Println(command, args)
//hho := exec.PassThrough
args = prepend(args, command)
env = mergeEnv(os.Environ(), env)
binpath, err := findCmd(findEnv(env, "PATH"), command)
if err != nil {
return nil, err
}
cmd := new(exec.Cmd)
cmd.Path = binpath
cmd.Args = args
cmd.Env = env
cmd.Dir = wd
cmd.Stderr = os.Stderr
cmd.Stdout = os.Stdout
err = cmd.Start()
if err != nil {
log.Print("Error running command ", command, ": ", err, "\n")
return nil, err
}
return cmd, nil
}
func writeGitRepositoryArchive(w io.Writer, path string, ref GitCommitRef) error {
var cmd *exec.Cmd
// TODO: Stream as tar with gzip
if ref == EmptyGitCommitRef {
cmd = exec.Command("/usr/bin/git", "archive", "--format", "zip", "master")
} else {
cmd = exec.Command("/usr/bin/git", "archive", "--format", "zip", string(ref))
}
cmd.Env = []string{}
cmd.Dir = path
var stderr bytes.Buffer
cmd.Stderr = utils.LimitWriter(&stderr, 20*1024)
stdout, err := cmd.StdoutPipe()
if err != nil {
return err
}
if err := cmd.Start(); err != nil {
return err
}
io.Copy(w, stdout)
if err := cmd.Wait(); err != nil {
return errors.New(fmt.Sprintf("Failed to archive repository: %s\n", err.Error()) + stderr.String())
}
return nil
}
func TestServerWithBasicAuth(t *testing.T) {
cmd := exec.Cmd{
Path: os.Getenv("GOPATH") + "/bin/docker-builder",
Args: []string{"docker-builder", "serve", "--username", "foo", "--password", "bar"},
}
if err := cmd.Start(); err != nil {
t.Errorf("error start server: %s\n", err.Error())
}
go func() {
time.Sleep(100 * time.Millisecond)
syscall.Kill(cmd.Process.Pid, syscall.SIGUSR1)
time.Sleep(100 * time.Millisecond)
syscall.Kill(cmd.Process.Pid, syscall.SIGTERM)
}()
if err := cmd.Wait(); err != nil {
if exiterr, ok := err.(*exec.ExitError); ok {
if status, ok := exiterr.Sys().(syscall.WaitStatus); ok {
if status.ExitStatus() != 166 {
t.Errorf("server exited unexpectedly and/or did not start correctly")
}
} else {
t.Errorf("unable to get process exit code")
}
} else {
t.Errorf("error waiting on server: %s\n", err.Error())
}
}
}
// Run() an instance of this container and return it's exec.Command reference and a
// channel that sends the exit code, when the container exits
func (c *Container) run() (*exec.Cmd, chan error) {
// the container name is semi random because containers can get wedged
// in docker and can not be removed until a reboot (or aufs trickery)
containerName := c.Name + "-" + uuid()
exitChan := make(chan error, 1)
args := make([]string, 0)
args = append(args, "run", "-rm", "-name", containerName)
// attach all exported ports
for _, port := range c.Ports {
args = append(args, "-p", fmt.Sprintf("%d:%d", port, port))
}
// attach resources directory to all containers
args = append(args, "-v", resourcesDir()+":"+"/usr/local/serviced/resources")
// attach all exported volumes
for name, volume := range c.Volumes {
hostDir := path.Join(c.VolumesDir(), c.Name, name)
if exists, _ := isDir(hostDir); !exists {
if err := os.MkdirAll(hostDir, 0777); err != nil {
glog.Errorf("could not create %s on host: %s", hostDir, err)
exitChan <- err
return nil, exitChan
}
}
args = append(args, "-v", hostDir+":"+volume)
}
// set the image and command to run
args = append(args, c.Repo+":"+c.Tag, "/bin/sh", "-c", c.Command)
glog.V(1).Infof("Executing docker %s", args)
var cmd *exec.Cmd
tries := 5
var err error
for {
if tries > 0 {
cmd = exec.Command("docker", args...)
if err := cmd.Start(); err != nil {
glog.Errorf("Could not start: %s", c.Name)
c.stop()
c.rm()
time.Sleep(time.Second * 1)
} else {
break
}
} else {
exitChan <- err
return cmd, exitChan
}
tries = -1
}
go func() {
exitChan <- cmd.Wait()
}()
return cmd, exitChan
}
func watcherLoop(watcher *fsnotify.Watcher) {
var cmd *exec.Cmd
for {
select {
case event := <-watcher.Events:
if event.Op&fsnotify.Write == fsnotify.Write {
for i := range tasks {
p := "./" + tasks[i].Pattern
if m, err := path.Match(p, event.Name); m && (err == nil) {
if cmd != nil {
cmd.Process.Kill()
}
name := tasks[i].Command[0]
args := tasks[i].Command[1:]
log.Print("> ", tasks[i].Name)
cmd = exec.Command(name, args...)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
cmd.Start()
}
}
}
case err := <-watcher.Errors:
log.Println("error:", err)
}
}
}
func ExecImpl(args *Data, env *SymbolTableFrame) (result *Data, err error) {
if !StringP(First(args)) {
err = ProcessError(fmt.Sprintf("exec requires a string command, but received %s.", String(First(args))), env)
}
cmdString := StringValue(First(args))
cmdArgs := make([]string, 0, Length(args)-1)
var cmd *exec.Cmd
if Length(args) > 1 {
for cell := Cdr(args); !NilP(cell); cell = Cdr(cell) {
value := Car(cell)
if StringP(value) || SymbolP(value) {
cmdArgs = append(cmdArgs, StringValue(value))
} else {
cmdArgs = append(cmdArgs, String(value))
}
}
cmd = exec.Command(cmdString, cmdArgs...)
} else {
cmd = exec.Command(cmdString)
}
err = cmd.Start()
return
}
func execCommand(cmd *exec.Cmd, prefix string, name string) (bool, *string, *string) {
out, err := cmd.StdoutPipe()
outE, errE := cmd.StderrPipe()
if err != nil {
log.Warnf("[command] %s err: %s", prefix, out)
log.Warnf("[command] %s err: %s", prefix, err)
return false, nil, nil
}
if errE != nil {
log.Warnf("[command] %s err: %s", prefix, outE)
log.Warnf("[command] %s err: %s", prefix, errE)
return false, nil, nil
}
err = cmd.Start()
if err != nil {
log.Warnf("[command] %s err: %s", prefix, err)
return false, nil, nil
}
outResult := copyStream(out, prefix, name)
errResult := copyStream(outE, prefix, name)
err = cmd.Wait()
if err != nil {
log.Warnf("[command] %s err: %s", prefix, err)
return false, &outResult, &errResult
}
return true, &outResult, &errResult
}
func ExecGenCmd(args []string) (string, error) {
var cmd *exec.Cmd
argsNew := make([]string, len(args)+1)
argsNew[0] = "generate"
for i, a := range args {
argsNew[i+1] = a
}
cmd = exec.Command("./ocitools", argsNew...)
cmd.Dir = "./plugins"
// cmd.stdin = os.Stdin
stderr, err := cmd.StderrPipe()
if err != nil {
log.Fatal("stderr err %v", err)
}
stdout, err := cmd.StdoutPipe()
if err != nil {
log.Fatalf("stdout err %v", err)
}
var retStr string
err = cmd.Start()
if err != nil {
retb, _ := ioutil.ReadAll(stderr)
retStr = string(retb)
// stdoutReader.ReadRune()
} else {
retb, _ := ioutil.ReadAll(stdout)
retStr = string(retb)
}
return retStr, err
}
func callCont(c *exec.Cmd, cont func(io.Reader) error) error {
_, callerFile, callerLine, _ := runtime.Caller(1)
log.Printf("%15s:%.3d -> %s", path.Base(callerFile), callerLine, strings.Join(c.Args, " "))
var reader io.Reader
var err error
if cont != nil {
reader, err = c.StdoutPipe()
if err != nil {
return err
}
}
stderr, err := c.StderrPipe()
if err != nil {
return err
}
if err = c.Start(); err != nil {
return err
}
if cont != nil {
if err = cont(reader); err != nil {
return err
}
}
buffer := bytes.NewBuffer(nil)
buffer.ReadFrom(stderr)
if buffer.Len() != 0 {
log.Print("Command had output on stderr.\n Cmd: ", strings.Join(c.Args, " "), "\nstderr: ", buffer)
}
return c.Wait()
}