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show.go
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show.go
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/*
Copyright 2017 WALLIX
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package commands
import (
"bytes"
"errors"
"fmt"
"os"
"strings"
"github.com/spf13/cobra"
"github.com/wallix/awless/cloud"
"github.com/wallix/awless/cloud/aws"
"github.com/wallix/awless/console"
"github.com/wallix/awless/graph"
"github.com/wallix/awless/logger"
"github.com/wallix/awless/sync"
)
func init() {
RootCmd.AddCommand(showCmd)
}
var showCmd = &cobra.Command{
Use: "show",
Short: "Show a resource and its interrelations given id or alias (i.e: resource's name)",
PersistentPreRun: applyHooks(initLoggerHook, initAwlessEnvHook, initCloudServicesHook, initSyncerHook, checkStatsHook),
PersistentPostRunE: saveHistoryHook,
RunE: func(cmd *cobra.Command, args []string) error {
if len(args) < 1 {
return errors.New("id required")
}
id := args[0]
notFound := fmt.Sprintf("resource with id %s not found", id)
var resource *graph.Resource
var gph *graph.Graph
resource, gph = findResourceInLocalGraphs(id)
if resource == nil && localFlag {
logger.Info(notFound)
return nil
} else if resource == nil {
runFullSync()
if resource, gph = findResourceInLocalGraphs(id); resource == nil {
logger.Info(notFound)
return nil
}
}
if !localFlag {
srv, err := cloud.GetServiceForType(resource.Type().String())
exitOn(err)
logger.Verbosef("syncing service for %s type", resource.Type())
_, err = sync.DefaultSyncer.Sync(srv)
exitOn(err)
}
if resource != nil {
displayer := console.BuildOptions(
console.WithHeaders(console.DefaultsColumnDefinitions[resource.Type()]),
console.WithFormat(listingFormat),
).SetSource(resource).Build()
exitOn(displayer.Print(os.Stderr))
var parents []*graph.Resource
err := gph.Accept(&graph.ParentsVisitor{From: resource, Each: graph.VisitorCollectFunc(&parents)})
exitOn(err)
fmt.Println("\nRelations:")
var count int
for i := len(parents) - 1; i >= 0; i-- {
if count == 0 {
fmt.Printf("%s\n", parents[i])
} else {
fmt.Printf("%s↳ %s\n", strings.Repeat("\t", count), parents[i])
}
count++
}
printWithTabs := func(r *graph.Resource, distance int) error {
var tabs bytes.Buffer
tabs.WriteString(strings.Repeat("\t", count))
for i := 0; i < distance; i++ {
tabs.WriteByte('\t')
}
display := r.String()
if r.Same(resource) {
display = renderGreenFn(resource.String())
}
fmt.Printf("%s↳ %s\n", tabs.String(), display)
return nil
}
err = gph.Accept(&graph.ChildrenVisitor{From: resource, Each: printWithTabs, IncludeFrom: true})
exitOn(err)
var siblings []*graph.Resource
err = gph.Accept(&graph.SiblingsVisitor{From: resource, Each: graph.VisitorCollectFunc(&siblings)})
exitOn(err)
printResourceList("Siblings", siblings)
appliedOn, err := gph.ListResourcesAppliedOn(resource)
exitOn(err)
printResourceList("Applied on", appliedOn)
dependingOn, err := gph.ListResourcesDependingOn(resource)
exitOn(err)
printResourceList("Depending on", dependingOn)
}
return nil
},
}
func runFullSync() map[string]*graph.Graph {
logger.Info("cannot resolve resource - running full sync")
var services []cloud.Service
for _, srv := range cloud.ServiceRegistry {
services = append(services, srv)
}
graphs, err := sync.DefaultSyncer.Sync(services...)
exitOn(err)
return graphs
}
func findResourceInLocalGraphs(id string) (*graph.Resource, *graph.Graph) {
if strings.HasPrefix(id, "@") {
name := id[1:]
resources := findResourcesByNameInLocalGraphs(name)
switch len(resources) {
case 0:
return nil, nil
case 1:
res := resources[0]
return res, sync.LoadCurrentLocalGraph(aws.ServicePerResourceType[res.Type().String()])
default:
var resourcesStr []string
for _, res := range resources {
resourcesStr = append(resourcesStr, fmt.Sprintf("%s[%s]", res.Id(), res.Type()))
}
logger.Infof("%d resources found with the name '%s': %s", len(resources), name, strings.Join(resourcesStr, ", "))
logger.Info("Show them using their id")
os.Exit(0)
}
}
for _, name := range aws.ServiceNames {
g := sync.LoadCurrentLocalGraph(name)
localRes, err := g.FindResource(id)
exitOn(err)
if localRes != nil {
return localRes, g
}
}
return nil, nil
}
func printResourceList(title string, list []*graph.Resource) {
all := graph.Resources(list).Map(func(r *graph.Resource) string { return r.String() })
if len(all) > 0 {
fmt.Printf("\n%s: %s\n", title, strings.Join(all, ", "))
}
}
func findResourcesByNameInLocalGraphs(name string) []*graph.Resource {
var res []*graph.Resource
for _, s := range aws.ServiceNames {
g := sync.LoadCurrentLocalGraph(s)
localRes, err := g.FindResourcesByProperty("Name", name)
exitOn(err)
res = append(res, localRes...)
}
return res
}