SVN Backup Script

How to Use

1. Download the script below
2. Make the script execuatable: chmod +x svn-backup.php
3. Set the 4 configuration variables at the top: $source_dir, $dest_dir, $tmp_dir & $hashfile
4. Run the script: ./svn-backup.php

Download

svn-backup.php.zip (1 KB)

#!/usr/bin/php5 -q
<?php 
// Requires PHP5 or the file_put_contents() function from PEAR::Compat

    $source_dir = "/usr/local/svn";             // this is a directory with my svn repositories in it
    $dest_dir = "/mnt/backup/svn";              // this is where the svn dumps will go
    $tmp_dir = "/usr/local/tmp";                // temp dir
    $hashfile = "/mnt/backup/svn/hashes.txt";   // we only back up repositories which have changed

    // read in the existing hash file if there is one
    $hashes = array();
    $hashlines = array();
    if (file_exists($hashfile)) {
        $hashlines = file($hashfile);           
    }
    // build this into a useful array
    foreach($hashlines as $hashline) {
        $key = substr($hashline,0,strpos($hashline,":"));
        $value = substr($hashline,strpos($hashline,":")+1);
        if ($key && $value) {
            $hashes[$key] = $value;         
        }
    }

    // loop thorugh the repositories in the source directory
    if ($handle = opendir($source_dir)) {
       while (false !== ($file = readdir($handle))) {
           if (is_dir($source_dir."/".$file) && $file != "." && $file != "..") {
                // generate an md5 hash for the contents of the repository
                $command = "svnlook info '$source_dir/$file'";
                // echo $command."\n";
                exec($command,$output);
                $md5 = trim(md5(trim(str_replace("\n","-",implode("\n",$output)))));
                if (!isset($hashes[$file]) || $hashes[$file] !== $md5) {
                // echo "dumping $file\n";
                $return = system("mkdir -p $tmp_dir/svn_backup/$file");     
                $return = system("svnadmin hotcopy $source_dir/$file $tmp_dir/svn_backup/$file");       
                $return = system("svnadmin dump -q $tmp_dir/svn_backup/$file | bzip2 -c > $dest_dir/$file.bz2");        
                $return = system("rm -Rf $tmp_dir/svn_backup/$file");                                               
                $hashes[$file] = $md5;
                }
           }
       }
       closedir($handle);
    }   

    $hashelines = "";
    foreach($hashes as $key => $md5) {
        $hashelines .= "$key:$md5\n";
    }

    file_put_contents($hashfile,$hashelines);

?>

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Tags

• SVN
• Subversion
• Backup
• Script
• Backup Script