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// Copyright 2015 The appc Authors
//
// 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 main
import (
"encoding/json"
"fmt"
"runtime"
"strings"
"github.com/appc/spec/discovery"
)
var (
outputJson bool
cmdDiscover = &Command{
Name: "discover",
Description: "Discover the download URLs for an app",
Summary: "Discover the download URLs for one or more app container images",
Usage: "[--json] [--port] [--insecure] APP...",
Run: runDiscover,
}
flagPort uint
)
func init() {
cmdDiscover.Flags.BoolVar(&transportFlags.Insecure, "insecure", false,
"Don't check TLS certificates and allow insecure non-TLS downloads over http")
cmdDiscover.Flags.BoolVar(&outputJson, "json", false,
"Output result as JSON")
cmdDiscover.Flags.UintVar(&flagPort, "port", 0,
"Port to connect to when performing discovery")
}
func runDiscover(args []string) (exit int) {
if len(args) < 1 {
stderr("discover: at least one name required")
}
for _, name := range args {
app, err := discovery.NewAppFromString(name)
if app.Labels["os"] == "" {
app.Labels["os"] = runtime.GOOS
}
if app.Labels["arch"] == "" {
app.Labels["arch"] = runtime.GOARCH
}
if err != nil {
stderr("%s: %s", name, err)
return 1
}
insecure := discovery.InsecureNone
if transportFlags.Insecure {
insecure = discovery.InsecureTLS | discovery.InsecureHTTP
}
eps, attempts, err := discovery.DiscoverACIEndpoints(*app, nil, insecure, flagPort)
if err != nil {
stderr("error fetching endpoints for %s: %s", name, err)
return 1
}
for _, a := range attempts {
fmt.Printf("discover endpoints walk: prefix: %s error: %v\n", a.Prefix, a.Error)
}
publicKeys, attempts, err := discovery.DiscoverPublicKeys(*app, nil, insecure, flagPort)
if err != nil {
stderr("error fetching public keys for %s: %s", name, err)
return 1
}
for _, a := range attempts {
fmt.Printf("discover public keys walk: prefix: %s error: %v\n", a.Prefix, a.Error)
}
type discoveryData struct {
ACIEndpoints []discovery.ACIEndpoint
PublicKeys []string
}
if outputJson {
dd := discoveryData{ACIEndpoints: eps, PublicKeys: publicKeys}
jsonBytes, err := json.MarshalIndent(dd, "", " ")
if err != nil {
stderr("error generating JSON: %s", err)
return 1
}
fmt.Println(string(jsonBytes))
} else {
for _, aciEndpoint := range eps {
fmt.Printf("ACI: %s, ASC: %s\n", aciEndpoint.ACI, aciEndpoint.ASC)
}
if len(publicKeys) > 0 {
fmt.Println("PublicKeys: " + strings.Join(publicKeys, ","))
}
}
}
return
}
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