func outputLog(out io.Writer) error {
dvol := api.NewDvolAPI(dvolAPIOptions)
activeVolume, err := dvol.ActiveVolume()
if err != nil {
return err
}
activeBranch, err := dvol.ActiveBranch(activeVolume)
if err != nil {
return err
}
commits, err := dvol.ListCommits(activeVolume, activeBranch)
if err != nil {
return err
}
for i := len(commits) - 1; i >= 0; i-- {
commit := commits[i]
fmt.Fprintf(out, "commit %s\n", commit.Id)
fmt.Fprint(out, "Author: Who knows <mystery@person>\n")
fmt.Fprint(out, "Date: Whenever\n\n")
fmt.Fprintf(out, " %s\n\n", commit.Message)
}
return nil
}
func removeVolume(cmd *cobra.Command, args []string, out io.Writer) error {
dvol := api.NewDvolAPI(dvolAPIOptions)
err := checkVolumeArgs(args)
if err != nil {
return err
}
volumeName := args[0]
if !api.ValidName(volumeName) {
return fmt.Errorf("Error: " + volumeName + " is not a valid name")
}
if !dvol.VolumeExists(volumeName) {
msg := fmt.Sprintf("Volume '%s' does not exist, cannot remove it", volumeName)
return fmt.Errorf(msg)
}
if forceRemoveVolume || userIsSure("This will remove all containers using the volume") {
s := fmt.Sprintf("Deleting volume '%s'", volumeName)
fmt.Fprintln(out, s)
err = dvol.RemoveVolume(volumeName)
if err != nil {
return fmt.Errorf("Error removing volume")
}
} else {
fmt.Fprintln(out, "Aborting.")
}
return nil
}
func resetVolume(cmd *cobra.Command, args []string, out io.Writer) error {
dvol := api.NewDvolAPI(dvolAPIOptions)
if len(args) != 1 {
return fmt.Errorf("Must specify one and only one commit identifier.")
}
commit := args[0]
if err := dvol.ResetActiveVolume(commit); err != nil {
return err
}
return nil
}
func switchVolume(cmd *cobra.Command, args []string, out io.Writer) error {
dvol := api.NewDvolAPI(dvolAPIOptions)
err := checkVolumeArgs(args)
if err != nil {
return err
}
volumeName := args[0]
if !api.ValidName(volumeName) {
return fmt.Errorf("Error: " + volumeName + " is not a valid name")
}
if !dvol.VolumeExists(volumeName) {
return fmt.Errorf("Error: " + volumeName + " does not exist")
}
err = dvol.SwitchVolume(volumeName)
if err != nil {
return fmt.Errorf("Error switching volume")
}
return nil
}
func checkoutBranch(cmd *cobra.Command, args []string, out io.Writer) error {
dvol := api.NewDvolAPI(dvolAPIOptions)
if len(args) != 1 {
return fmt.Errorf("Must specify a branch name.")
}
branchName := args[0]
activeVolume, err := dvol.ActiveVolume()
if err != nil {
return err
}
activeBranch, err := dvol.ActiveBranch(activeVolume)
if err != nil {
return err
}
if err := dvol.CheckoutBranch(activeVolume, activeBranch, branchName, createBranch); err != nil {
return err
}
return nil
}
func commitVolume(cmd *cobra.Command, commitMessage string, out io.Writer) error {
if commitMessage == "" {
return fmt.Errorf("You must provide a commit message")
}
// TODO need to add user's name and email adddress
dvol := api.NewDvolAPI(dvolAPIOptions)
activeVolume, err := dvol.ActiveVolume()
if err != nil {
return err
}
activeBranch, err := dvol.ActiveBranch(activeVolume)
if err != nil {
return err
}
commitId, err := dvol.Commit(activeVolume, activeBranch, commitMessage)
if err != nil {
return err
}
fmt.Printf("%s\n", commitId)
return nil
}
func initVolume(cmd *cobra.Command, args []string, out io.Writer) error {
dvol := api.NewDvolAPI(dvolAPIOptions)
err := checkVolumeArgs(args)
if err != nil {
return err
}
volumeName := args[0]
if !api.ValidName(volumeName) {
return fmt.Errorf("Error: " + volumeName + " is not a valid name")
}
if dvol.VolumeExists(volumeName) {
return fmt.Errorf("Error: volume " + volumeName + " already exists")
}
err = dvol.CreateVolume(volumeName)
if err != nil {
return fmt.Errorf("Error creating volume")
}
fmt.Fprintln(out, "Created volume", volumeName)
fmt.Fprintf(out, "Created branch %s/%s\n", volumeName, api.DEFAULT_BRANCH)
return nil
}
func volumeDriverList(w http.ResponseWriter, r *http.Request) {
log.Print("<= /VolumeDriver.List")
dvol := api.NewDvolAPI(api.DvolAPIOptions{
BasePath: VOL_DIR,
})
allVolumes, err := dvol.AllVolumes()
if err != nil {
writeResponseErr(err, w)
}
var response = ResponseList{
Err: "",
}
for _, volume := range allVolumes {
response.Volumes = append(response.Volumes, ResponseListVolume{
Name: volume.Name,
Mountpoint: volume.Path,
})
}
responseJSON, _ := json.Marshal(response)
w.Write(responseJSON)
}
func main() {
log.Print("Starting dvol plugin")
if _, err := os.Stat(PLUGINS_DIR); err != nil {
if err := os.MkdirAll(PLUGINS_DIR, 0700); err != nil {
log.Fatalf("Could not make plugin directory %s: %v", PLUGINS_DIR, err)
}
}
if _, err := os.Stat(DVOL_SOCKET); err == nil {
if err = os.Remove(DVOL_SOCKET); err != nil {
log.Fatalf("Could not clean up existing socket at %s: %v", DVOL_SOCKET, err)
}
}
if _, err := os.Stat(VOL_DIR); err != nil {
if err := os.MkdirAll(VOL_DIR, 0700); err != nil {
log.Fatalf("Could not make volumes directory %s: %v", VOL_DIR, err)
}
}
http.HandleFunc("/Plugin.Activate", func(w http.ResponseWriter, r *http.Request) {
log.Print("<= /Plugin.Activate")
responseJSON, _ := json.Marshal(&ResponseImplements{
Implements: []string{"VolumeDriver"},
})
w.Write(responseJSON)
})
http.HandleFunc("/VolumeDriver.Create", func(w http.ResponseWriter, r *http.Request) {
log.Print("<= /VolumeDriver.Create")
requestJSON, err := ioutil.ReadAll(r.Body)
if err != nil {
log.Fatalf("Unable to read response body %s", err)
}
request := new(RequestCreate)
json.Unmarshal(requestJSON, request)
name := request.Name
dvol := api.NewDvolAPI(api.DvolAPIOptions{
BasePath: VOL_DIR,
})
if dvol.VolumeExists(name) {
log.Print("Volume already exists ", name)
} else {
err := dvol.CreateVolume(name)
if err != nil {
writeResponseErr(fmt.Errorf("Could not create volume %s: %v", name, err), w)
return
}
}
writeResponseOK(w)
})
http.HandleFunc("/VolumeDriver.Remove", func(w http.ResponseWriter, r *http.Request) {
/*
We do not actually want to remove the dvol volume when Docker references to them are removed.
This is a no-op.
*/
writeResponseOK(w)
})
http.HandleFunc("/VolumeDriver.Path", func(w http.ResponseWriter, r *http.Request) {
})
http.HandleFunc("/VolumeDriver.Mount", func(w http.ResponseWriter, r *http.Request) {
log.Print("<= /VolumeDriver.Mount")
requestJSON, err := ioutil.ReadAll(r.Body)
if err != nil {
log.Fatalf("Unable to read response body %s", err)
}
request := new(RequestMount)
json.Unmarshal(requestJSON, request)
name := request.Name
dvol := api.NewDvolAPI(api.DvolAPIOptions{
BasePath: VOL_DIR,
})
if !dvol.VolumeExists(name) {
// Volume does not exist. We will implicitly create it.
log.Printf("Attempting to mount unknown volume %s, creating it", name)
err := dvol.CreateVolume(name)
if err != nil {
writeResponseErr(fmt.Errorf("Could not create volume %s: %v", name, err), w)
return
}
}
err = dvol.SwitchVolume(name)
if err != nil {
writeResponseErr(err, w)
return
}
_, err = dvol.ActiveVolume()
if err != nil {
writeResponseErr(err, w)
return
}
path := dvol.VolumePath(name)
responseJSON, _ := json.Marshal(&ResponseMount{
Mountpoint: path,
Err: "",
})
w.Write(responseJSON)
})
http.HandleFunc("/VolumeDriver.Unmount", func(w http.ResponseWriter, r *http.Request) {
writeResponseOK(w)
})
http.HandleFunc("/VolumeDriver.List", volumeDriverList)
listener, err := net.Listen("unix", DVOL_SOCKET)
if err != nil {
log.Fatalf("Could not listen on %s: %v", DVOL_SOCKET, err)
}
http.Serve(listener, nil)
}
