forked from juju/juju
/
regions.go
239 lines (209 loc) · 6.05 KB
/
regions.go
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// Copyright 2016 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.
package cloud
import (
"fmt"
"io"
"github.com/juju/ansiterm"
"github.com/juju/cmd/v3"
"github.com/juju/errors"
"github.com/juju/gnuflag"
"github.com/juju/names/v4"
"gopkg.in/yaml.v2"
cloudapi "github.com/DavinZhang/juju/api/cloud"
jujucloud "github.com/DavinZhang/juju/cloud"
jujucmd "github.com/DavinZhang/juju/cmd"
"github.com/DavinZhang/juju/cmd/juju/common"
"github.com/DavinZhang/juju/cmd/modelcmd"
"github.com/DavinZhang/juju/cmd/output"
"github.com/DavinZhang/juju/jujuclient"
)
type listRegionsCommand struct {
modelcmd.OptionalControllerCommand
out cmd.Output
cloudName string
cloudAPIFunc func() (CloudRegionsAPI, error)
found *FoundRegions
}
var listRegionsDoc = `
List regions for a given cloud.
Use --controller option to list regions from the cloud from a controller.
Use --client option to list regions known locally on this client.
Examples:
juju regions aws
juju regions aws --controller mycontroller
juju regions aws --client
juju regions aws --client --controller mycontroller
See also:
add-cloud
clouds
show-cloud
update-cloud
update-public-clouds
`
type CloudRegionsAPI interface {
Cloud(tag names.CloudTag) (jujucloud.Cloud, error)
Close() error
}
// NewListRegionsCommand returns a command to list cloud region information.
func NewListRegionsCommand() cmd.Command {
store := jujuclient.NewFileClientStore()
c := &listRegionsCommand{
OptionalControllerCommand: modelcmd.OptionalControllerCommand{
Store: store,
ReadOnly: true,
},
}
c.cloudAPIFunc = c.cloudAPI
return modelcmd.WrapBase(c)
}
func (c *listRegionsCommand) cloudAPI() (CloudRegionsAPI, error) {
root, err := c.NewAPIRoot(c.Store, c.ControllerName, "")
if err != nil {
return nil, errors.Trace(err)
}
return cloudapi.NewClient(root), nil
}
// Info implements Command.Info.
func (c *listRegionsCommand) Info() *cmd.Info {
return jujucmd.Info(&cmd.Info{
Name: "regions",
Args: "<cloud>",
Purpose: "Lists regions for a given cloud.",
Doc: listRegionsDoc,
Aliases: []string{"list-regions"},
})
}
// SetFlags implements Command.SetFlags.
func (c *listRegionsCommand) SetFlags(f *gnuflag.FlagSet) {
c.OptionalControllerCommand.SetFlags(f)
c.out.AddFlags(f, "tabular", map[string]cmd.Formatter{
"yaml": cmd.FormatYaml,
"json": cmd.FormatJson,
"tabular": c.formatRegionsListTabular,
})
}
// Init implements Command.Init.
func (c *listRegionsCommand) Init(args []string) error {
if err := c.OptionalControllerCommand.Init(args); err != nil {
return err
}
switch len(args) {
case 0:
return errors.New("no cloud specified")
case 1:
c.cloudName = args[0]
}
return cmd.CheckEmpty(args[1:])
}
type FoundRegions struct {
Local interface{} `yaml:"client-cloud-regions,omitempty" json:"client-cloud-regions,omitempty"`
Remote interface{} `yaml:"controller-cloud-regions,omitempty" json:"controller-cloud-regions,omitempty"`
}
func (f *FoundRegions) IsEmpty() bool {
return f == &FoundRegions{}
}
// Run implements Command.Run.
func (c *listRegionsCommand) Run(ctxt *cmd.Context) error {
if err := c.MaybePrompt(ctxt, fmt.Sprintf("list regions for cloud %q from", c.cloudName)); err != nil {
return errors.Trace(err)
}
c.found = &FoundRegions{}
var returnErr error
if c.Client {
if err := c.findLocalRegions(ctxt); err != nil {
ctxt.Infof("ERROR %v", err)
returnErr = cmd.ErrSilent
}
}
if c.ControllerName != "" {
if err := c.findRemoteRegions(ctxt); err != nil {
ctxt.Infof("ERROR %v", err)
returnErr = cmd.ErrSilent
}
}
if !c.found.IsEmpty() {
if err := c.out.Write(ctxt, *c.found); err != nil {
return err
}
}
return returnErr
}
func (c *listRegionsCommand) findRemoteRegions(ctxt *cmd.Context) error {
api, err := c.cloudAPIFunc()
if err != nil {
return errors.Trace(err)
}
defer api.Close()
aCloud, err := api.Cloud(names.NewCloudTag(c.cloudName))
if err != nil {
return errors.Annotatef(err, "on controller %q", c.ControllerName)
}
if len(aCloud.Regions) == 0 {
fmt.Fprintf(ctxt.GetStdout(), "Cloud %q has no regions defined on controller %q.\n", c.cloudName, c.ControllerName)
return nil
}
c.found.Remote = c.parseRegions(aCloud)
return nil
}
func (c *listRegionsCommand) findLocalRegions(ctxt *cmd.Context) error {
cloud, err := common.CloudByName(c.cloudName)
if err != nil {
return errors.Trace(err)
}
if len(cloud.Regions) == 0 {
fmt.Fprintf(ctxt.GetStdout(), "Cloud %q has no regions defined locally on this client.\n", c.cloudName)
return nil
}
c.found.Local = c.parseRegions(*cloud)
return nil
}
func (c *listRegionsCommand) parseRegions(aCloud jujucloud.Cloud) interface{} {
if c.out.Name() == "json" {
details := make(map[string]RegionDetails)
for _, r := range aCloud.Regions {
details[r.Name] = RegionDetails{
Endpoint: r.Endpoint,
IdentityEndpoint: r.IdentityEndpoint,
StorageEndpoint: r.StorageEndpoint,
}
}
return details
}
details := make(yaml.MapSlice, len(aCloud.Regions))
for i, r := range aCloud.Regions {
details[i] = yaml.MapItem{r.Name, RegionDetails{
Name: r.Name,
Endpoint: r.Endpoint,
IdentityEndpoint: r.IdentityEndpoint,
StorageEndpoint: r.StorageEndpoint,
}}
}
return details
}
func (c *listRegionsCommand) formatRegionsListTabular(writer io.Writer, value interface{}) error {
regions, ok := value.(FoundRegions)
if !ok {
return errors.Errorf("expected value of type %T, got %T", regions, value)
}
return formatRegionsTabular(writer, regions)
}
func formatRegionsTabular(writer io.Writer, regions FoundRegions) error {
tw := output.TabWriter(writer)
w := output.Wrapper{tw}
if locals, ok := regions.Local.(yaml.MapSlice); ok {
w.Println("\nClient Cloud Regions")
for _, r := range locals {
w.Println(r.Key)
}
}
if remotes, ok := regions.Remote.(yaml.MapSlice); ok {
w.Println("\nController Cloud Regions")
for _, r := range remotes {
w.PrintColor(ansiterm.Foreground(ansiterm.BrightBlue), r.Key)
w.Println()
}
}
tw.Flush()
return nil
}