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package flagparser
import (
"os"
"path"
"strconv"
"strings"
"github.com/docker/swarmkit/api"
"github.com/pkg/errors"
"github.com/spf13/pflag"
)
// parseTmpfs supports a simple tmpfs decl, similar to docker run.
//
// This should go away.
func parseTmpfs(flags *pflag.FlagSet, spec *api.ServiceSpec) error {
if flags.Changed("tmpfs") {
tmpfss, err := flags.GetStringSlice("tmpfs")
if err != nil {
return err
}
container := spec.Task.GetContainer()
// TODO(stevvooe): Nasty inline parsing code, replace with mount syntax.
for _, tmpfs := range tmpfss {
parts := strings.SplitN(tmpfs, ":", 2)
if len(parts) < 1 {
return errors.Errorf("invalid mount spec: %v", tmpfs)
}
if len(parts[0]) == 0 || !path.IsAbs(parts[0]) {
return errors.Errorf("invalid mount spec: %v", tmpfs)
}
m := api.Mount{
Type: api.MountTypeTmpfs,
Target: parts[0],
}
if len(parts) == 2 {
if strings.Contains(parts[1], ":") {
// repeated colon is illegal
return errors.Errorf("invalid mount spec: %v", tmpfs)
}
// BUG(stevvooe): Cobra stringslice actually doesn't correctly
// handle comma separated values, so multiple flags aren't
// really supported. We'll have to replace StringSlice with a
// type that doesn't use the csv parser. This is good enough
// for now.
flags := strings.Split(parts[1], ",")
var opts api.Mount_TmpfsOptions
for _, flag := range flags {
switch {
case strings.HasPrefix(flag, "size="):
meat := strings.TrimPrefix(flag, "size=")
// try to parse this into bytes
i, err := strconv.ParseInt(meat, 10, 64)
if err != nil {
// remove suffix and try again
suffix := meat[len(meat)-1]
meat = meat[:len(meat)-1]
var multiplier int64
switch suffix {
case 'g':
multiplier = 1 << 30
case 'm':
multiplier = 1 << 20
case 'k':
multiplier = 1 << 10
default:
return errors.Errorf("invalid size format: %v", flag)
}
// reparse the meat
var err error
i, err = strconv.ParseInt(meat, 10, 64)
if err != nil {
return err
}
i *= multiplier
}
opts.SizeBytes = i
case strings.HasPrefix(flag, "mode="):
meat := strings.TrimPrefix(flag, "mode=")
i, err := strconv.ParseInt(meat, 8, 32)
if err != nil {
return err
}
opts.Mode = os.FileMode(i)
case flag == "ro":
m.ReadOnly = true
case flag == "rw":
m.ReadOnly = false
case flag == "exec":
opts.Options = "exec"
case flag == "noexec":
opts.Options = "noexec"
default:
return errors.New("unsupported flag")
}
}
m.TmpfsOptions = &opts
}
container.Mounts = append(container.Mounts, m)
}
}
return nil
}
|
