github.com/vmware/govmomi@v0.43.0/govc/version/command.go (about) 1 /* 2 Copyright (c) 2014-2015 VMware, Inc. All Rights Reserved. 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 17 package version 18 19 import ( 20 "context" 21 "flag" 22 "fmt" 23 "strings" 24 25 "github.com/vmware/govmomi/govc/cli" 26 "github.com/vmware/govmomi/govc/flags" 27 ) 28 29 type version struct { 30 *flags.EmptyFlag 31 32 require string 33 long bool // detailed govc version output 34 } 35 36 func init() { 37 cli.Register("version", &version{}) 38 } 39 40 func (cmd *version) Register(ctx context.Context, f *flag.FlagSet) { 41 f.StringVar(&cmd.require, "require", "", "Require govc version >= this value") 42 f.BoolVar(&cmd.long, "l", false, "Print detailed govc version information") 43 } 44 45 func (cmd *version) Run(ctx context.Context, f *flag.FlagSet) error { 46 ver := strings.TrimPrefix(flags.BuildVersion, "v") 47 if cmd.require != "" { 48 v, err := flags.ParseVersion(ver) 49 if err != nil { 50 panic(err) 51 } 52 53 rv, err := flags.ParseVersion(cmd.require) 54 if err != nil { 55 return fmt.Errorf("failed to parse required version '%s': %s", cmd.require, err) 56 } 57 58 if !rv.Lte(v) { 59 return fmt.Errorf("version %s or higher is required, this is version %s", cmd.require, ver) 60 } 61 } 62 63 if cmd.long { 64 fmt.Printf("Build Version: %s\n", flags.BuildVersion) 65 fmt.Printf("Build Commit: %s\n", flags.BuildCommit) 66 fmt.Printf("Build Date: %s\n", flags.BuildDate) 67 } else { 68 fmt.Printf("govc %s\n", ver) 69 } 70 71 return nil 72 }