forked from TheNewNormal/corectl
/
list.go
140 lines (132 loc) · 3.37 KB
/
list.go
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// Copyright 2015 - António Meireles <antonio.meireles@reformi.st>
//
// 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"
"io/ioutil"
"os"
"path"
"path/filepath"
"time"
"github.com/blang/semver"
"github.com/spf13/cobra"
)
var (
lsCmd = &cobra.Command{
Use: "ls",
Aliases: []string{"list"},
Short: "Lists locally available CoreOS images",
PreRunE: defaultPreRunE,
RunE: lsCommand,
}
)
func lsCommand(cmd *cobra.Command, args []string) (err error) {
var (
channels []string
local map[string]semver.Versions
)
if local, err = localImages(); err != nil {
return
}
if engine.rawArgs.GetBool("all") {
channels = DefaultChannels
} else {
channels = append(channels,
normalizeChannelName(engine.rawArgs.GetString("channel")))
}
if engine.rawArgs.GetBool("json") {
var pp []byte
if len(channels) == 1 {
if pp, err = json.MarshalIndent(
local[normalizeChannelName(engine.rawArgs.GetString("channel"))],
"", " "); err != nil {
return
}
} else {
if pp, err = json.MarshalIndent(local, "", " "); err != nil {
return
}
}
fmt.Println(string(pp))
return
}
fmt.Println("locally available images")
for _, i := range channels {
var header bool
for _, d := range local[i] {
if !header {
fmt.Printf(" - %s channel \n", i)
header = true
}
fmt.Println(" -", d.String())
}
}
return
}
func init() {
lsCmd.Flags().String("channel", "alpha", "CoreOS channel")
lsCmd.Flags().BoolP("all", "a", false, "browses all channels")
lsCmd.Flags().BoolP("json", "j", false,
"outputs in JSON for easy 3rd party integration")
RootCmd.AddCommand(lsCmd)
}
func localImages() (local map[string]semver.Versions, err error) {
var (
files []os.FileInfo
f os.FileInfo
channel string
stamp, _ = time.Parse("2006-01-02T15:04:05MST", LatestImageBreackage)
)
local = make(map[string]semver.Versions, 0)
for _, channel = range DefaultChannels {
if files, err = ioutil.ReadDir(filepath.Join(engine.imageDir,
channel)); err != nil {
return
}
var v semver.Versions
for _, f = range files {
if f.IsDir() {
ok := true
var ff string
for _, ff = range []string{"coreos_production_pxe.vmlinuz",
"coreos_production_pxe_image.cpio.gz"} {
if _, err = os.Stat(path.Join(engine.imageDir,
channel, f.Name(), ff)); err != nil {
ok = false
break
}
}
if ok && f.ModTime().After(stamp) {
var s semver.Version
if s, err = semver.Make(f.Name()); err != nil {
return
}
v = append(v, s)
} else {
// force rebuild if local image assembled before last time
// we changed its expcted format or something got missing
if err = os.RemoveAll(path.Join(engine.imageDir, channel,
f.Name(), ff)); err != nil {
return
}
}
}
}
semver.Sort(v)
local[channel] = v
}
return
}