github.com/vmware/govmomi@v0.37.2/govc/datastore/download.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 datastore
    18  
    19  import (
    20  	"context"
    21  	"errors"
    22  	"flag"
    23  	"fmt"
    24  	"io"
    25  	"os"
    26  
    27  	"github.com/vmware/govmomi/govc/cli"
    28  	"github.com/vmware/govmomi/govc/flags"
    29  	"github.com/vmware/govmomi/vim25/soap"
    30  )
    31  
    32  type download struct {
    33  	*flags.DatastoreFlag
    34  	*flags.HostSystemFlag
    35  }
    36  
    37  func init() {
    38  	cli.Register("datastore.download", &download{})
    39  }
    40  
    41  func (cmd *download) Register(ctx context.Context, f *flag.FlagSet) {
    42  	cmd.DatastoreFlag, ctx = flags.NewDatastoreFlag(ctx)
    43  	cmd.DatastoreFlag.Register(ctx, f)
    44  
    45  	cmd.HostSystemFlag, ctx = flags.NewHostSystemFlag(ctx)
    46  	cmd.HostSystemFlag.Register(ctx, f)
    47  }
    48  
    49  func (cmd *download) Process(ctx context.Context) error {
    50  	if err := cmd.DatastoreFlag.Process(ctx); err != nil {
    51  		return err
    52  	}
    53  	if err := cmd.HostSystemFlag.Process(ctx); err != nil {
    54  		return err
    55  	}
    56  	return nil
    57  }
    58  
    59  func (cmd *download) Usage() string {
    60  	return "SOURCE DEST"
    61  }
    62  
    63  func (cmd *download) Description() string {
    64  	return `Copy SOURCE from DS to DEST on the local system.
    65  
    66  If DEST name is "-", source is written to stdout.
    67  
    68  Examples:
    69    govc datastore.download vm-name/vmware.log ./local.log
    70    govc datastore.download vm-name/vmware.log - | grep -i error`
    71  }
    72  
    73  func (cmd *download) Run(ctx context.Context, f *flag.FlagSet) error {
    74  	args := f.Args()
    75  	if len(args) != 2 {
    76  		return errors.New("invalid arguments")
    77  	}
    78  
    79  	ds, err := cmd.Datastore()
    80  	if err != nil {
    81  		return err
    82  	}
    83  
    84  	h, err := cmd.HostSystemIfSpecified()
    85  	if err != nil {
    86  		return err
    87  	}
    88  
    89  	var via string
    90  
    91  	if h != nil {
    92  		via = fmt.Sprintf(" via %s", h.InventoryPath)
    93  		ctx = ds.HostContext(ctx, h)
    94  	}
    95  
    96  	p := soap.DefaultDownload
    97  
    98  	src := args[0]
    99  	dst := args[1]
   100  
   101  	if dst == "-" {
   102  		f, _, err := ds.Download(ctx, src, &p)
   103  		if err != nil {
   104  			return err
   105  		}
   106  		_, err = io.Copy(os.Stdout, f)
   107  		return err
   108  	}
   109  
   110  	if cmd.DatastoreFlag.OutputFlag.TTY {
   111  		logger := cmd.DatastoreFlag.ProgressLogger(fmt.Sprintf("Downloading%s... ", via))
   112  		p.Progress = logger
   113  		defer logger.Wait()
   114  	}
   115  
   116  	return ds.DownloadFile(ctx, src, dst, &p)
   117  }