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delete.go
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delete.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 (
"fmt"
"log"
"os"
"path/filepath"
"github.com/blang/semver"
"github.com/spf13/cobra"
)
var (
rmCmd = &cobra.Command{
Use: "rm",
Aliases: []string{"rmi"},
Short: "Removes one or more CoreOS images from local fs",
PreRunE: defaultPreRunE,
RunE: rmCommand,
}
)
func defaultPreRunE(cmd *cobra.Command, args []string) (err error) {
if len(args) != 0 {
return fmt.Errorf("Incorrect usage. " +
"This command doesn't accept any arguments.")
}
engine.rawArgs.BindPFlags(cmd.Flags())
return err
}
func rmCommand(cmd *cobra.Command, args []string) (err error) {
var (
channel = normalizeChannelName(engine.rawArgs.GetString("channel"))
version = normalizeVersion(engine.rawArgs.GetString("version"))
ll map[string]semver.Versions
l semver.Versions
)
if ll, err = localImages(); err != nil {
return err
}
l = ll[channel]
if engine.rawArgs.GetBool("old") {
for _, v := range l[0 : l.Len()-1] {
if err = os.RemoveAll(filepath.Join(engine.imageDir,
channel, "/", v.String())); err != nil {
return
}
log.Printf("removed %s/%s\n", channel, version)
}
return
}
if version == "latest" {
if l.Len() > 0 {
version = l[l.Len()-1].String()
} else {
log.Println("nothing to delete")
return
}
}
target := filepath.Join(engine.imageDir, channel, "/", version)
if _, err = os.Stat(target); err != nil {
log.Printf("%s/%s not found\n", channel, version)
return nil
}
if err = os.RemoveAll(target); err == nil {
log.Printf("removed %s/%s\n", channel, version)
}
return
}
func init() {
rmCmd.Flags().String("channel", "alpha", "CoreOS channel")
rmCmd.Flags().String("version", "latest", "CoreOS version")
rmCmd.Flags().Bool("old", false, "removes outdated images")
RootCmd.AddCommand(rmCmd)
}