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package shell
import (
"bytes"
"errors"
"fmt"
"io"
"os"
"os/exec"
"os/signal"
shellquote "github.com/kballard/go-shellquote"
"github.com/zyedidia/micro/v2/internal/screen"
"github.com/zyedidia/micro/v2/internal/util"
)
// ExecCommand executes a command using exec
// It returns any output/errors
func ExecCommand(name string, arg ...string) (string, error) {
var err error
cmd := exec.Command(name, arg...)
outputBytes := &bytes.Buffer{}
cmd.Stdout = outputBytes
cmd.Stderr = outputBytes
err = cmd.Start()
if err != nil {
return "", err
}
err = cmd.Wait() // wait for command to finish
outstring := outputBytes.String()
return outstring, err
}
// RunCommand executes a shell command and returns the output/error
func RunCommand(input string) (string, error) {
args, err := shellquote.Split(input)
if err != nil {
return "", err
}
if len(args) == 0 {
return "", errors.New("No arguments")
}
inputCmd := args[0]
return ExecCommand(inputCmd, args[1:]...)
}
// RunBackgroundShell runs a shell command in the background
// It returns a function which will run the command and returns a string
// message result
func RunBackgroundShell(input string) (func() string, error) {
args, err := shellquote.Split(input)
if err != nil {
return nil, err
}
if len(args) == 0 {
return nil, errors.New("No arguments")
}
inputCmd := args[0]
return func() string {
output, err := RunCommand(input)
str := output
if err != nil {
str = fmt.Sprint(inputCmd, " exited with error: ", err, ": ", output)
}
return str
}, nil
}
// RunInteractiveShell runs a shellcommand interactively
func RunInteractiveShell(input string, wait bool, getOutput bool) (string, error) {
args, err := shellquote.Split(input)
if err != nil {
return "", err
}
if len(args) == 0 {
return "", errors.New("No arguments")
}
inputCmd := args[0]
// Shut down the screen because we're going to interact directly with the shell
screenb := screen.TempFini()
args = args[1:]
// Set up everything for the command
outputBytes := &bytes.Buffer{}
cmd := exec.Command(inputCmd, args...)
cmd.Stdin = os.Stdin
if getOutput {
cmd.Stdout = io.MultiWriter(os.Stdout, outputBytes)
} else {
cmd.Stdout = os.Stdout
}
cmd.Stderr = os.Stderr
// This is a trap for Ctrl-C so that it doesn't kill micro
// micro is killed if the signal is ignored only on Windows, so it is
// received
c := make(chan os.Signal, 1)
signal.Reset(os.Interrupt)
signal.Notify(c, os.Interrupt)
err = cmd.Start()
if err == nil {
err = cmd.Wait()
if wait {
// This is just so we don't return right away and let the user press enter to return
screen.TermMessage("")
}
} else {
screen.TermMessage(err)
}
output := outputBytes.String()
// Start the screen back up
screen.TempStart(screenb)
signal.Notify(util.Sigterm, os.Interrupt)
signal.Stop(c)
return output, err
}
// UserCommand runs the shell command
// The openTerm argument specifies whether a terminal should be opened (for viewing output
// or interacting with stdin)
// func UserCommand(input string, openTerm bool, waitToFinish bool) string {
// if !openTerm {
// RunBackgroundShell(input)
// return ""
// } else {
// output, _ := RunInteractiveShell(input, waitToFinish, false)
// return output
// }
// }
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