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<b>Warning</b>:  session_start(): open(/var/lib/php/sessions/sess_fsks1u828sd8o81o5ppg64igas, O_RDWR) failed: No space left on device (28) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
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<b>Warning</b>:  session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
!7

sS progID = #1007510;

p {
  new L<File> files;
  new Map<File, Double> ageMap;
  
  Pattern pat = Pattern.compile("^(.*)\\.backup(20\\d\\d)(\\d\\d)(\\d\\d)-(\\d\\d)$");
  for (File f : listFilesNotDirs(programDir(progID))) {
    S s = f.getName();
    Matcher matcher = pat.matcher(s);
    continue unless matcher.find();
    S originalName = matcher.group(1);
    continue unless eq(originalName, "concepts.structure.gz");
    //print("Found backup: " + sfu(matcherGroups(matcher)));
    int year = matcherInt(matcher, 2);
    int month = matcherInt(matcher, 3);
    int day = matcherInt(matcher, 4);
    int hour = matcherInt(matcher, 5);
    long time = timestampFromYMDH(year, month, day, hour);
    double age = ((now()-time)/1000.0/60/60/24;
    //print("Age: " + age + " days");
    ageMap.put(f, age);
    files.add(f);
  }
  
  sortByMap_inPlace(files, ageMap);
  double lastAge = -1;
  for (File f : files) {
    double age = ageMap.get(f);
    if (!shouldKeep(age, lastAge))
      print("Deleting: " + f);
    else {
      print("Keeping: " + f);
      lastAge = age;
    }
  }
}

// age = age in days
sbool shouldKeep(double age, double lastAge) {
  if (age <= 2) true;
  if (age >= lastAge+1) true;
  false;
}