github.com/olivere/camlistore@v0.0.0-20140121221811-1b7ac2da0199/cmd/camtool/dp_idx_rebuild.go (about)

     1  /*
     2  Copyright 2013 Google Inc.
     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 main
    18  
    19  import (
    20  	"errors"
    21  	"flag"
    22  	"fmt"
    23  	"log"
    24  	"os"
    25  
    26  	"camlistore.org/pkg/blobserver/diskpacked"
    27  	"camlistore.org/pkg/cmdmain"
    28  	"camlistore.org/pkg/jsonconfig"
    29  	"camlistore.org/pkg/osutil"
    30  	"camlistore.org/pkg/serverconfig"
    31  )
    32  
    33  type reindexdpCmd struct {
    34  	overwrite, verbose bool
    35  }
    36  
    37  func init() {
    38  	cmdmain.RegisterCommand("reindex-diskpacked",
    39  		func(flags *flag.FlagSet) cmdmain.CommandRunner {
    40  			cmd := new(reindexdpCmd)
    41  			flags.BoolVar(&cmd.overwrite, "overwrite", false,
    42  				"Overwrite the existing index.kv? If not, than only checking is made.")
    43  			return cmd
    44  		})
    45  }
    46  
    47  func (c *reindexdpCmd) Describe() string {
    48  	return "Rebuild the index of the diskpacked blob store"
    49  }
    50  
    51  func (c *reindexdpCmd) Usage() {
    52  	fmt.Fprintln(os.Stderr, "Usage: camtool [globalopts] reindex-diskpacked [reindex-opts]")
    53  	fmt.Fprintln(os.Stderr, "       camtool reindex-diskpacked")
    54  	fmt.Fprintln(os.Stderr, "       camtool reindex-diskpacked --overwrite")
    55  }
    56  
    57  func (c *reindexdpCmd) RunCommand(args []string) error {
    58  	var path string
    59  	switch {
    60  	case len(args) == 0:
    61  		cfg, err := serverconfig.Load(osutil.UserServerConfigPath())
    62  		if err != nil {
    63  			return err
    64  		}
    65  		prefixes, ok := cfg.Obj["prefixes"].(map[string]interface{})
    66  		if !ok {
    67  			return fmt.Errorf("No 'prefixes' object in low-level (or converted) config file %s", osutil.UserServerConfigPath())
    68  		}
    69  		paths := []string{}
    70  		for prefix, vei := range prefixes {
    71  			pmap, ok := vei.(map[string]interface{})
    72  			if !ok {
    73  				log.Printf("prefix %q value is a %T, not an object", prefix, vei)
    74  				continue
    75  			}
    76  			pconf := jsonconfig.Obj(pmap)
    77  			handlerType := pconf.RequiredString("handler")
    78  			handlerArgs := pconf.OptionalObject("handlerArgs")
    79  			// no pconf.Validate, as this is a recover tool
    80  			if handlerType != "storage-diskpacked" {
    81  				continue
    82  			}
    83  			if handlerArgs == nil {
    84  				log.Printf("no handlerArgs for %q", prefix)
    85  				continue
    86  			}
    87  			aconf := jsonconfig.Obj(handlerArgs)
    88  			path = aconf.RequiredString("path")
    89  			// no aconv.Validate, as this is a recover tool
    90  			if path != "" {
    91  				paths = append(paths, path)
    92  			}
    93  		}
    94  		if len(paths) == 0 {
    95  			return fmt.Errorf("Server config file %s doesn't specify a disk-packed storage handler.",
    96  				osutil.UserServerConfigPath())
    97  		}
    98  		if len(paths) > 1 {
    99  			return fmt.Errorf("Ambiguity. Server config file %s d specify more than 1 disk-packed storage handler. Please specify one of: %v", osutil.UserServerConfigPath(), paths)
   100  		}
   101  		path = paths[0]
   102  	case len(args) == 1:
   103  		path = args[0]
   104  	default:
   105  		return errors.New("More than 1 argument not allowed")
   106  	}
   107  	if path == "" {
   108  		return errors.New("no path is given/found")
   109  	}
   110  
   111  	return diskpacked.Reindex(path, c.overwrite)
   112  }