forked from michaelsauter/crane
/
main.go
64 lines (58 loc) · 1.44 KB
/
main.go
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package main
import (
"fmt"
"github.com/michaelsauter/crane/print"
"os"
"os/exec"
"strings"
)
func main() {
// On panic, recover the error and display it
defer func() {
if err := recover(); err != nil {
print.Error("ERROR: %s\n", err)
}
}()
handleCmd()
}
func executeCommand(name string, args []string) {
if isVerbose() {
fmt.Printf("\n--> %s %s\n", name, strings.Join(args, " "))
}
cmd := exec.Command(name, args...)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
cmd.Stdin = os.Stdin
cmd.Run()
if !cmd.ProcessState.Success() {
panic(cmd.ProcessState.String()) // pass the error?
}
}
func commandOutput(name string, args []string) (string, error) {
out, err := exec.Command(name, args...).CombinedOutput()
return strings.TrimSpace(string(out)), err
}
// from https://gist.github.com/dagoof/1477401
func pipedCommandOutput(pipedCommandArgs ...[]string) ([]byte, error) {
var commands []exec.Cmd
for _, commandArgs := range pipedCommandArgs {
if isVerbose() {
fmt.Printf("\n--> %s %s\n", commandArgs[0], strings.Join(commandArgs[1:], " "))
}
cmd := exec.Command(commandArgs[0], commandArgs[1:]...)
commands = append(commands, *cmd)
}
for i, command := range commands[:len(commands)-1] {
out, err := command.StdoutPipe()
if err != nil {
return nil, err
}
command.Start()
commands[i+1].Stdin = out
}
final, err := commands[len(commands)-1].Output()
if err != nil {
return nil, err
}
return final, nil
}