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main.go
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main.go
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// Copyright (c) 2016 by 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"
"os"
"os/user"
"strings"
"github.com/TheNewNormal/corectl/components/host/session"
"github.com/TheNewNormal/corectl/release"
"github.com/deis/pkg/log"
"github.com/spf13/cobra"
)
var (
rootCmd = &cobra.Command{
Use: session.AppName(),
Short: release.ShortBanner,
Long: release.Banner,
Run: func(cmd *cobra.Command, args []string) {
cmd.UsageFunc()(cmd)
},
SilenceUsage: true,
SilenceErrors: true,
}
ErrNotEnoughRights = fmt.Errorf(
"attempting a privileged operation without proper rights")
ErrTooManyRights = fmt.Errorf("too many privileges invoking %v, "+
"please call it as a regular user", session.AppName())
ErrOwnerUnset = func(cmd *cobra.Command) error {
return fmt.Errorf("attempting to call '%v' without "+
"setting a valid user (--user)", cmd.Name())
}
)
func init() {
if session.AppName() != "corectld" {
rootCmd.PersistentFlags().StringP("server", "s", "127.0.0.1",
"corectld location")
rootCmd.PersistentFlags().MarkHidden("server")
}
rootCmd.PersistentPreRunE =
func(cmd *cobra.Command, args []string) (err error) {
cli := session.Caller.CmdLine
cli.BindPFlags(cmd.Flags())
log.DefaultLogger.SetDebug(cli.GetBool("debug"))
if session.AppName() != "corectld" {
if session.Caller.Privileged {
return ErrTooManyRights
}
} else {
if !session.Caller.Privileged && cmd.Name() == "uuid2mac" {
return ErrNotEnoughRights
}
if session.Caller.Privileged {
if cmd.Name() == "uuid2mac" {
return
}
if cmd.Name() == "start" {
var usr *user.User
usr, err = user.Lookup(cli.GetString("user"))
if err != nil {
return ErrOwnerUnset(cmd)
}
session.Caller.User = usr
} else {
return ErrTooManyRights
}
}
}
if !(strings.HasPrefix(cmd.Name(), "genM") ||
cmd.Name() == "version") {
if err = session.Caller.Network.SetContext(); err != nil {
return
}
err = session.Caller.NormalizeOnDiskLayout()
}
return
}
}
func defaultPreRunE(cmd *cobra.Command, args []string) error {
if len(args) != 0 {
return fmt.Errorf("Incorrect usage. " +
"This command doesn't accept any arguments.")
}
return nil
}
func viperStringSliceBugWorkaround(plain []string) []string {
// getting around https://github.com/spf13/viper/issues/112
var sliced []string
for _, x := range plain {
strip := strings.Replace(
strings.Replace(x, "]", "", -1), "[", "", -1)
for _, y := range strings.Split(strip, ",") {
sliced = append(sliced, y)
}
}
return sliced
}
func main() {
var err error
if session.Caller, err = session.New(); err != nil {
return
}
session.Caller.CmdLine.BindPFlags(rootCmd.PersistentFlags())
if session.AppName() != "corectld" {
session.Caller.ServerAddress =
session.Caller.CmdLine.GetString("server") + ":2511"
}
if err = rootCmd.Execute(); err != nil {
log.Err(err.Error())
os.Exit(-1)
}
}