func run(args []string) (err error) {
// If invoked with a single "--help" argument, print a usage message and exit
// successfully.
if len(args) == 2 && args[1] == "--help" {
fmt.Fprintf(
os.Stderr,
"Usage: %s [-o options] bucket_name mount_point\n",
args[0])
return
}
// Find the path to gcsfuse.
gcsfusePath, err := findGcsfuse()
if err != nil {
err = fmt.Errorf("findGcsfuse: %v", err)
return
}
// Find the path to fusermount.
fusermountPath, err := findFusermount()
if err != nil {
err = fmt.Errorf("findFusermount: %v", err)
return
}
// Attempt to parse arguments.
device, mountPoint, opts, err := parseArgs(args)
if err != nil {
err = fmt.Errorf("parseArgs: %v", err)
return
}
// Choose gcsfuse args.
gcsfuseArgs, err := makeGcsfuseArgs(device, mountPoint, opts)
if err != nil {
err = fmt.Errorf("makeGcsfuseArgs: %v", err)
return
}
fmt.Fprintf(
os.Stderr,
"Calling gcsfuse with arguments: %s\n",
strings.Join(gcsfuseArgs, " "))
// Call gcsfuse and wait for it to successfully mount.
err = daemon.Mount(
gcsfusePath,
fusermountPath,
gcsfuseArgs,
os.Stderr)
if err != nil {
err = fmt.Errorf("daemon.Mount: %v", err)
return
}
return
}
// Call gcsfuse with the supplied args, waiting for it to mount. Return nil
// only if it mounts successfully.
func (t *GcsfuseTest) mount(args []string) (err error) {
err = daemon.Mount(t.gcsfusePath, gFusermountPath, args, ioutil.Discard)
return
}