github.com/slspeek/camlistore_namedsearch@v0.0.0-20140519202248-ed6f70f7721a/dev/devcam/cammount.go (about)

     1  /*
     2  Copyright 2013 The Camlistore 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  
    17  // This file adds the "mount" subcommand to devcam, to run cammount against the dev server.
    18  
    19  package main
    20  
    21  import (
    22  	"flag"
    23  	"fmt"
    24  	"os"
    25  	"os/exec"
    26  	"path/filepath"
    27  	"runtime"
    28  	"strconv"
    29  	"strings"
    30  
    31  	"camlistore.org/pkg/cmdmain"
    32  )
    33  
    34  type mountCmd struct {
    35  	// start of flag vars
    36  	altkey bool
    37  	path   string
    38  	port   string
    39  	tls    bool
    40  	debug  bool
    41  	// end of flag vars
    42  
    43  	env *Env
    44  }
    45  
    46  const mountpoint = "/tmp/cammount-dir"
    47  
    48  func init() {
    49  	cmdmain.RegisterCommand("mount", func(flags *flag.FlagSet) cmdmain.CommandRunner {
    50  		cmd := &mountCmd{
    51  			env: NewCopyEnv(),
    52  		}
    53  		flags.BoolVar(&cmd.altkey, "altkey", false, "Use different gpg key and password from the server's.")
    54  		flags.BoolVar(&cmd.tls, "tls", false, "Use TLS.")
    55  		flags.StringVar(&cmd.path, "path", "/", "Optional URL prefix path.")
    56  		flags.StringVar(&cmd.port, "port", "3179", "Port camlistore is listening on.")
    57  		flags.BoolVar(&cmd.debug, "debug", false, "print debugging messages.")
    58  		return cmd
    59  	})
    60  }
    61  
    62  func (c *mountCmd) Usage() {
    63  	fmt.Fprintf(cmdmain.Stderr, "Usage: devcam mount [mount_opts] [<root-blobref>|<share URL>]\n")
    64  }
    65  
    66  func (c *mountCmd) Examples() []string {
    67  	return []string{
    68  		"",
    69  		"http://localhost:3169/share/<blobref>",
    70  	}
    71  }
    72  
    73  func (c *mountCmd) Describe() string {
    74  	return "run cammount in dev mode."
    75  }
    76  
    77  func tryUnmount(dir string) error {
    78  	if runtime.GOOS == "darwin" {
    79  		return exec.Command("diskutil", "umount", "force", dir).Run()
    80  	}
    81  	return exec.Command("fusermount", "-u", dir).Run()
    82  }
    83  
    84  func (c *mountCmd) RunCommand(args []string) error {
    85  	err := c.checkFlags(args)
    86  	if err != nil {
    87  		return cmdmain.UsageError(fmt.Sprint(err))
    88  	}
    89  	if !*noBuild {
    90  		if err := build(filepath.Join("cmd", "cammount")); err != nil {
    91  			return fmt.Errorf("Could not build cammount: %v", err)
    92  		}
    93  	}
    94  	c.env.SetCamdevVars(c.altkey)
    95  
    96  	tryUnmount(mountpoint)
    97  	if err := os.Mkdir(mountpoint, 0700); err != nil && !os.IsExist(err) {
    98  		return fmt.Errorf("Could not make mount point: %v", err)
    99  	}
   100  
   101  	blobserver := "http://localhost:" + c.port + c.path
   102  	if c.tls {
   103  		blobserver = strings.Replace(blobserver, "http://", "https://", 1)
   104  	}
   105  
   106  	cmdBin := filepath.Join("bin", "cammount")
   107  	cmdArgs := []string{
   108  		"-debug=" + strconv.FormatBool(c.debug),
   109  		"-server=" + blobserver,
   110  	}
   111  	cmdArgs = append(cmdArgs, args...)
   112  	cmdArgs = append(cmdArgs, mountpoint)
   113  	fmt.Printf("Cammount running with mountpoint %v. Press 'q' <enter> or ctrl-c to shut down.\n", mountpoint)
   114  	return runExec(cmdBin, cmdArgs, c.env)
   115  }
   116  
   117  func (c *mountCmd) checkFlags(args []string) error {
   118  	if _, err := strconv.ParseInt(c.port, 0, 0); err != nil {
   119  		return fmt.Errorf("Invalid -port value: %q", c.port)
   120  	}
   121  	return nil
   122  }