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lazygit/pkg/commands/exec_live_default.go

58 lines
1.4 KiB
Go

// +build !windows
package commands
import (
"bufio"
"os/exec"
"regexp"
"github.com/ionrock/procs"
"github.com/kr/pty"
"github.com/mgutz/str"
)
// RunCommandWithOutputLiveWrapper runs a command and return every word that gets written in stdout
// Output is a function that executes by every word that gets read by bufio
// As return of output you need to give a string that will be written to stdin
// NOTE: If the return data is empty it won't written anything to stdin
// NOTE: You don't have to include a enter in the return data this function will do that for you
func RunCommandWithOutputLiveWrapper(c *OSCommand, command string, output func(string) string) error {
splitCmd := str.ToArgv(command)
cmd := exec.Command(splitCmd[0], splitCmd[1:]...)
cmd.Env = procs.Env(map[string]string{
"LANG": "en_US.utf8",
"LC_ALL": "en_US.UTF-8",
}, true)
tty, err := pty.Start(cmd)
if err != nil {
return err
}
defer func() { _ = tty.Close() }()
go func() {
// Regex to cleanup the command output
// sometimes the output words include unneeded spaces at eatch end of the string
re := regexp.MustCompile(`(^\s*)|(\s*$)`)
scanner := bufio.NewScanner(tty)
scanner.Split(bufio.ScanWords)
for scanner.Scan() {
toWrite := output(re.ReplaceAllString(scanner.Text(), ""))
if len(toWrite) > 0 {
_, _ = tty.Write([]byte(toWrite + "\n"))
}
}
}()
if err := cmd.Wait(); err != nil {
return err
}
return nil
}