add shell.Exec() to execute and never return

Signed-off-by: Jeff Carr <jcarr@wit.com>

shell.go

@@ -16,6 +16,9 @@ import "github.com/svent/go-nbreader"
 import log "github.com/sirupsen/logrus"
 // import "github.com/wercker/journalhook"
 
+// 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
@@ -251,3 +254,19 @@ func nonBlockingReader(buffReader *bufio.Reader, writeFileHandle *os.File, stdou
 		}
 	}
 }
+
+// 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.Println("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.Start()
+	err := process.Wait()
+	log.Println("shell.Exec() err =", err)
+	os.Exit(0)
+}

wget.go

@@ -45,6 +45,8 @@ func Wget(url string) (*bytes.Buffer) {
 }
 
 func WgetToFile(filepath string, url string) error {
+	log.Println("WgetToFile() filepath =", filepath)
+	log.Println("WgetToFile() URL =", url)
 	// Get the data
 	resp, err := http.Get(url)
 	if err != nil {