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SVN Backup vbscript for Windows 2003

From: Remo Pistor <remop_at_rocketgaming.com>
Date: 2007-07-30 19:28:26 CEST

I had a particularly hard time finding a script for backing up my
subversion repositories that was designed specifically for Windows,
so I decided to hunker down and create my own. Now I don't claim to
be any kind of VBscript expert but I did the best with what I got.

I'm posting my script so that others can use it and not have to go
through the same agony as I did. I've tried to make it as portable
and user friendly as possible.

'**********************************************************************
'*
'* backup.vbs: performs a full backup using the hotcopy function once
'* a week and incremental backups the remaining 6 days of
'* the week using the dump command. You can specify what
'* day you want the full backup to occur and if it is the
'* first time you are running the script it will recognize
'* this and run a full backup regardless of what day it
'* is. Prior to running the full backup the script will
'* clean all of the previous weeks backups.
'*
'* How to use: It is intended to be used as a scheduled job using
'* Windows' Task Scheduler.
'* Simply type "cscript <path to script>\backup.vbs" in
'* your new task a and select the time and days of the
'* week you want the backup to run.
'*
'* The script has been created and tested against:
'* Subversion 1.4.3
'* FSFS Database
'* Windows 2003 Server
'*
'*
'* NO Copyright 2007 Remo Pistor <remop@rocketgaming.com>
'* A large credit goes to Mike at http://svn.spears.at/ whose
'* vbscript I used as a foundation to this script.
'*
'* Permission to use, copy, modify, and distribute this software for
'* any purpose with or without fee is hereby granted. It would be
'* nice if the above credit and this permission notice appear in all
'* copies.
'*
'* Also, the software is provided "AS IS" and the author disclaim all
'* warranties with regard to this software including all implied
'* warranties of merchantability and fitness. In no event shall the
'* author be liable for any special, direct, indirect, or
'* consequential damages or any damages whatsoever resulting from loss
'* of use, data or profits, whether in an action of contract,
'* negligence or other tortuous action, arising out of or in
'* connection with the use or performance of this software.
'*
'**********************************************************************

Const ForReading = 1
Const ForWriting = 2
Const ForAppending = 8

'********************Change to match your preferences******************
Const repoPath = "C:\SVN\" 'Path to parent folder for repositories
                              'Be sure to use trailing slash \
Const backupPath = "C:\Backup" 'Path to backup folder.
strRepos = "IT Media" 'List the repository names seperated by a
                                          'space
strDOFB = "Wed" 'Day of full backup - Select between Sun, Mon, Tue,
                              'Wed, Thu, Fri, or Sat.
strSVNexe = "C:\Subversion\bin\" 'Subversion bin install path with
                                                      'trailing slash \
'********************No changes below here should be required**********

aRepos = Split( strRepos )

dow = WeekDayName(WeekDay(Date),True)
today = DatePart( "yyyy", Date ) & DatePart( "m", Date ) & DatePart( _
 "d", Date )

Set objFSO = CreateObject( "Scripting.FileSystemObject" )
Set WshShell = CreateObject( "WScript.Shell" )

For i=Lbound( aRepos ) to Ubound( aRepos )
  repositoryProj1 = repoPath & aRepos(i)
  getYoungestProj1 = strSVNexe & "svnlook youngest " + repositoryProj1
  Call CreateDump(backupPath & "\" & aRepos(i) & ".log", _
   backupPath & "\" & aRepos(i) & "-last.txt", getYoungestProj1, _
    repositoryProj1, aRepos(i) )
Next

WScript.Quit( 0 )

'**********************************************************************
'*
'* End of script body
'*
'**********************************************************************

Sub CreateDump(logFileName, lastFileName, getYoungestCmd, repository, _
 dumpName)

  ' Open the log file
  Set objLogFile = objFSO.OpenTextFile(logFileName, ForAppending, True)
  objLogFile.WriteLine Now & " - - Script started - -"
  
  ' Default last revision is 0
  lastRev = 0
  
  ' Does the file exist?
  If ( objFSO.FileExists( lastFileName ) ) Then
    Set objFile = objFSO.GetFile( lastFileName )
    ' Does it contain anything?
    If ( objFile.Size > 0 ) Then
      Set objTextFile = objFSO.OpenTextFile(lastFileName, ForReading)
      ' Get the last revison and increase it by 1
      lastRev = objTextFile.Readline
      lastRev = lastRev + 1
    End If
  End If
  
  ' Execute the getYoungestCmd and read its output
  Set objExec = WshShell.Exec( getYoungestCmd )
  
  Do While ( objExec.Status <> 1 )
       WScript.Sleep 100
  Loop
  
  youngest = objExec.StdOut.Readline
  strBackupType = 0 'Default backup type, 0 = Full, 1 = Incremental

  
  'Determine whether full or incremental
  If ( lastRev > 0 ) Then
      ' Add incremental, if not starting a new dump
  
    'Is today not the full backup day
    If ( dow <> strDOFB ) Then
      objLogFile.WriteLine Now & " Starting incremental backup."
      strBackupType = 1 'Change backup type to incremental
      
      ' Is the youngest revision above the last one?
      If ( CLng( lastRev ) > CLng( youngest ) ) Then
        objLogFile.WriteLine Now & " Exiting: lastRev (" & lastRev _
         & ") > youngest (" & youngest & ")"
        objLogFile.WriteLine Now & " Script done"
        objLogFile.Close
        Exit Sub
      End If

      'Incremental Backup
      ' Compose the file name
      dumpFileName = backupPath & "\" & "ibu" & dumpName & "_" & _
       lastRev & "-" & youngest & "-" & dow & ".dmp"
      objLogFile.WriteLine Now & " " & dumpFileName
 
      ' Compose the dump command for the current repository
      dumpCommand = strSVNexe & "svnadmin.exe dump " & repository & _
       " --revision " & lastRev & ":" & youngest & _
        " --incremental > " & dumpFileName

' objLogFile.WriteLine Now & " " & dumpCommand 'Used to debug
  
        ' Open the destination file and execute the dump command
        Set objDumpFile = objFSO.OpenTextFile( dumpFileName, _
         ForWriting, True )
        Set objExecDump = WshShell.Exec ( dumpCommand )
            
            ' Read the dump output and write it to the file
            Do While Not objExecDump.StdOut.AtEndOfStream
' objDumpFile.Write objExecDump.StdOut.ReadLine
                input = objExecDump.StdOut.Read(1024)
                  objDumpFile.Write input
            Loop
        objDumpFile.Close
      End If
  End If
      

  ' Full Backup
  ' If incremental backup occured backup type = 1
  ' otherwise do full backup
  If ( strBackupType = 0 ) Then
  
  Set objWMIService = GetObject("winmgmts:\\.\root\cimv2")

      
      ' Remove last weeks full backup folder

      Set objFolder = objFSO.GetFolder( backupPath & "\" )
      Set colSubfolders = objFolder.Subfolders
            
      If colSubfolders.Count <> 0 Then
        For Each objSubfolder In colSubfolders
          If InStr( objSubfolder.Name, "fbu" & dumpName ) Then
           objLogFile.WriteLine Now & " " _
            & objSubfolder.Name & " deleted..."
' Wscript.Echo objSubfolder.Path ' For debugging
           objSubfolder.Delete True
          End If
        Next
      End If

      ' Remove all of last weeks incremental backup files
      Set colFileList = objWMIService.ExecQuery _
       ("ASSOCIATORS OF {Win32_Directory.Name='" & backupPath & _
        "'} Where ResultClass = CIM_DataFile")
            
      If colFileList.Count <> 0 Then
        For Each objFile In colFileList
          If InStr( objFile.FileName, "ibu" & dumpName ) Then
            objLogFile.WriteLine Now & " " & objFile.FileName & _
             " deleted..."
            objFile.Delete

          End If
        Next
      End If

    ' Compose the folder name
    hotcopyFolderName = backupPath & "\" & "fbu" & dumpName & _
     "_Full-" & today
    ' Compose the hotcopy command for the current repository
      hotcopyCommand = strSVNexe & "svnadmin.exe hotcopy " _
       & repository & " " & hotcopyFolderName

      objLogFile.WriteLine Now & " Starting Full backup."
      objLogFile.WriteLine Now & " " & hotcopyFolderName

      ' Execute the hotcopy command
      Set objExecHotCopy = WshShell.Exec( hotcopyCommand )
      
      Do While ( objExecHotCopy.Status <> 1 )
            WScript.Sleep 100
      Loop
      
      
  End If

  
  ' Write the latest revision into the file
  Set objTextFile = objFSO.OpenTextFile(lastFileName, ForWriting, True)
  objTextFile.Write youngest
  objTextFile.Close
  
  ' Close the log file and exit
  objLogFile.WriteLine Now & " - - Script done - - "
  objLogFile.Close
  
End Sub

Enjoy and let me know what you think.

Thanks,
______________________
Remo Pistor
Systems Administrator
Rocket Gaming Systems
 
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Received on Mon Jul 30 19:27:11 2007

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