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util.go
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/
util.go
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package command
import (
"fmt"
"io/ioutil"
"os"
"path"
"runtime"
"time"
getter "github.com/hashicorp/go-getter"
"github.com/hashicorp/nomad/helper/discover"
)
// fetchBinary fetches the nomad binary and returns the temporary directory where it exists
func fetchBinary(bin string) (string, error) {
nomadBinaryDir, err := ioutil.TempDir("", "")
if err != nil {
return "", fmt.Errorf("failed to create temp dir: %v", err)
}
if bin == "" {
bin, err = discover.NomadExecutable()
if err != nil {
return "", fmt.Errorf("failed to discover nomad binary: %v", err)
}
}
dest := path.Join(nomadBinaryDir, "nomad")
if runtime.GOOS == "windows" {
dest = dest + ".exe"
}
if err = getter.GetFile(dest, bin); err != nil {
return "", fmt.Errorf("failed to get nomad binary: %v", err)
}
return nomadBinaryDir, nil
}
func procWaitTimeout(p *os.Process, d time.Duration) error {
stop := make(chan struct{})
go func() {
p.Wait()
stop <- struct{}{}
}()
select {
case <-stop:
return nil
case <-time.NewTimer(d).C:
return fmt.Errorf("timeout waiting for process %d to exit", p.Pid)
}
}