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|
package shell
import (
"io/ioutil"
"os"
"os/exec"
"strings"
"time"
"go.wit.com/log"
)
// TODO: look at https://github.com/go-cmd/cmd/issues/20
// use go-cmd instead here?
var callback func(interface{}, int)
var shellStdout *os.File
var shellStderr *os.File
var spewOn bool = false
var quiet bool = false
// var msecDelay int = 20 // number of milliseconds to delay between reads with no data
// var bytesBuffer bytes.Buffer
// var bytesSplice []byte
func handleError(c interface{}, ret int) {
log.Log(INFO, "shell.Run() Returned", ret)
if callback != nil {
callback(c, ret)
}
}
func init() {
callback = nil
}
func InitCallback(f func(interface{}, int)) {
callback = f
}
// this means it won't copy all the output to STDOUT
func Quiet(q bool) {
quiet = q
}
func Script(cmds string) int {
// split on new lines (while we are at it, handle stupid windows text files
lines := strings.Split(strings.Replace(cmds, "\r\n", "\n", -1), "\n")
for _, line := range lines {
line = Chomp(line) // this is like 'chomp' in perl
log.Log(INFO, "LINE:", line)
time.Sleep(1)
RunString(line)
}
return 0
}
func SpewOn() {
spewOn = true
}
func SetDelayInMsec(msecs int) {
msecDelay = msecs
}
func SetStdout(newout *os.File) {
shellStdout = newout
}
func SetStderr(newerr *os.File) {
shellStderr = newerr
}
func Unlink(filename string) bool {
if err := os.Remove(filename); err != nil {
return Exists(filename)
} else {
return Exists(filename)
}
}
func RM(filename string) {
os.Remove(Path(filename))
}
func Daemon(cmdline string, timeout time.Duration) int {
for {
RunString(cmdline)
time.Sleep(timeout)
}
}
// run something and never return from it
// TODO: pass STDOUT, STDERR, STDIN correctly
// TODO: figure out how to nohup the process and exit
func Exec(cmdline string) {
log.Log(INFO, "shell.Run() START "+cmdline)
cmd := Chomp(cmdline) // this is like 'chomp' in perl
cmdArgs := strings.Fields(cmd)
process := exec.Command(cmdArgs[0], cmdArgs[1:len(cmdArgs)]...)
process.Stderr = os.Stderr
process.Stdin = os.Stdin
process.Stdout = os.Stdout
process.Start()
err := process.Wait()
log.Log(INFO, "shell.Exec() err =", err)
os.Exit(0)
}
// run interactively. output from the cmd is in real time
// shows all the output. For example, 'ping -n localhost'
// shows the output like you would expect to see
func NewRun(workingpath string, cmd []string) error {
log.Log(INFO, "NewRun() ", cmd)
process := exec.Command(cmd[0], cmd[1:len(cmd)]...)
// Set the working directory
process.Dir = workingpath
process.Stderr = os.Stderr
process.Stdin = os.Stdin
process.Stdout = os.Stdout
process.Start()
err := process.Wait()
log.Log(INFO, "shell.Exec() err =", err)
return err
}
// return true if the filename exists (cross-platform)
func Exists(filename string) bool {
_, err := os.Stat(Path(filename))
if os.IsNotExist(err) {
return false
}
return true
}
// makes the directory
func Mkdir(dir string) bool {
if Dir(dir) {
// already a dir
return true
}
if Exists(dir) {
// something else is there
return false
}
Run([]string{"mkdir", "-p", dir})
return true
}
func IsDir(dirname string) bool {
return Dir(dirname)
}
// return true if the filename exists (cross-platform)
func Dir(dirname string) bool {
info, err := os.Stat(Path(dirname))
if os.IsNotExist(err) {
return false
}
return info.IsDir()
}
// Cat a file into a string
func Cat(filename string) string {
buffer, err := ioutil.ReadFile(Path(filename))
// log.Log(INFO, "buffer =", string(buffer))
if err != nil {
return ""
}
return Chomp(buffer)
}
|
