moby/utils.go
Solomon Hykes 6393c38339 Move the canonical run configuration objects to a sub-package
* Config is now runconfig.Config
    * HostConfig is now runconfig.HostConfig
    * MergeConfig is now runconfig.Merge
    * CompareConfig is now runconfig.Compare
    * ParseRun is now runconfig.Parse
    * ContainerConfigFromJob is now runconfig.ContainerConfigFromJob
    * ContainerHostConfigFromJob is now runconfig.ContainerHostConfigFromJob

This facilitates refactoring commands.go and shrinks the core.

Docker-DCO-1.1-Signed-off-by: Solomon Hykes <solomon@docker.com> (github: shykes)
2014-02-11 20:18:46 -08:00

83 lines
1.8 KiB
Go

package docker
import (
"github.com/dotcloud/docker/archive"
"github.com/dotcloud/docker/nat"
"github.com/dotcloud/docker/pkg/namesgenerator"
"github.com/dotcloud/docker/runconfig"
"github.com/dotcloud/docker/utils"
"io"
"sync/atomic"
)
type Change struct {
archive.Change
}
func migratePortMappings(config *runconfig.Config, hostConfig *runconfig.HostConfig) error {
if config.PortSpecs != nil {
ports, bindings, err := nat.ParsePortSpecs(config.PortSpecs)
if err != nil {
return err
}
config.PortSpecs = nil
if len(bindings) > 0 {
if hostConfig == nil {
hostConfig = &runconfig.HostConfig{}
}
hostConfig.PortBindings = bindings
}
if config.ExposedPorts == nil {
config.ExposedPorts = make(nat.PortSet, len(ports))
}
for k, v := range ports {
config.ExposedPorts[k] = v
}
}
return nil
}
// Links come in the format of
// name:alias
func parseLink(rawLink string) (map[string]string, error) {
return utils.PartParser("name:alias", rawLink)
}
type checker struct {
runtime *Runtime
}
func (c *checker) Exists(name string) bool {
return c.runtime.containerGraph.Exists("/" + name)
}
// Generate a random and unique name
func generateRandomName(runtime *Runtime) (string, error) {
return namesgenerator.GenerateRandomName(&checker{runtime})
}
// Read an io.Reader and call a function when it returns EOF
func EofReader(r io.Reader, callback func()) *eofReader {
return &eofReader{
Reader: r,
callback: callback,
}
}
type eofReader struct {
io.Reader
gotEOF int32
callback func()
}
func (r *eofReader) Read(p []byte) (n int, err error) {
n, err = r.Reader.Read(p)
if err == io.EOF {
// Use atomics to make the gotEOF check threadsafe
if atomic.CompareAndSwapInt32(&r.gotEOF, 0, 1) {
r.callback()
}
}
return
}