1/* 2 Copyright The containerd Authors. 3 4 Licensed under the Apache License, Version 2.0 (the "License"); 5 you may not use this file except in compliance with the License. 6 You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15*/ 16 17package commands 18 19import ( 20 "io" 21 "io/ioutil" 22 "os" 23 "text/tabwriter" 24 25 pb "github.com/containerd/continuity/proto" 26 "github.com/golang/protobuf/proto" 27 "github.com/spf13/cobra" 28) 29 30var ( 31 MainCmd = &cobra.Command{ 32 Use: "continuity <command>", 33 Short: "A transport-agnostic filesytem metadata tool.", 34 } 35 36 // usageTemplate is nearly identical to the default template without the 37 // automatic addition of flags. Instead, Command.Use is used unmodified. 38 usageTemplate = `Usage:{{if .Runnable}} 39 {{.UseLine}}{{end}}{{if .HasSubCommands}} 40 {{ .CommandPath}} [command]{{end}}{{if gt .Aliases 0}} 41 42Aliases: 43 {{.NameAndAliases}} 44{{end}}{{if .HasExample}} 45 46Examples: 47{{ .Example }}{{end}}{{ if .HasAvailableSubCommands}} 48 49Available Commands:{{range .Commands}}{{if .IsAvailableCommand}} 50 {{rpad .Name .NamePadding }} {{.Short}}{{end}}{{end}}{{end}}{{ if .HasLocalFlags}} 51 52Flags: 53{{.LocalFlags.FlagUsages | trimRightSpace}}{{end}}{{ if .HasInheritedFlags}} 54 55Global Flags: 56{{.InheritedFlags.FlagUsages | trimRightSpace}}{{end}}{{if .HasHelpSubCommands}} 57 58Additional help topics:{{range .Commands}}{{if .IsHelpCommand}} 59 {{rpad .CommandPath .CommandPathPadding}} {{.Short}}{{end}}{{end}}{{end}}{{ if .HasSubCommands }} 60 61Use "{{.CommandPath}} [command] --help" for more information about a command.{{end}} 62` 63) 64 65func init() { 66 MainCmd.AddCommand(BuildCmd) 67 MainCmd.AddCommand(VerifyCmd) 68 MainCmd.AddCommand(ApplyCmd) 69 MainCmd.AddCommand(LSCmd) 70 MainCmd.AddCommand(StatsCmd) 71 MainCmd.AddCommand(DumpCmd) 72 if MountCmd != nil { 73 MainCmd.AddCommand(MountCmd) 74 } 75 MainCmd.SetUsageTemplate(usageTemplate) 76} 77 78// readManifestFile reads the manifest from the given path. This should 79// probably be provided by the continuity library. 80func readManifestFile(path string) (*pb.Manifest, error) { 81 p, err := ioutil.ReadFile(path) 82 if err != nil { 83 return nil, err 84 } 85 86 var bm pb.Manifest 87 88 if err := proto.Unmarshal(p, &bm); err != nil { 89 return nil, err 90 } 91 92 return &bm, nil 93} 94 95// newTabwriter provides a common tabwriter with defaults. 96func newTabwriter(w io.Writer) *tabwriter.Writer { 97 return tabwriter.NewWriter(os.Stdout, 0, 2, 2, ' ', 0) 98} 99