scripts/dl_cleanup.py

   1 #!/usr/bin/env python
   2 """
   3 # OpenWRT download directory cleanup utility.
   4 # Delete all but the very last version of the program tarballs.
   5 #
   6 # Copyright (C) 2010 Michael Buesch <mb@bu3sch.de>
   7 # Copyright (C) 2013 OpenWrt.org
   8 """
   9
  10 import sys
  11 import os
  12 import re
  13 import getopt
  14
  15 # Commandline options
  16 opt_dryrun = False
  17
  18
  19 def parseVer_1234(match, filepath):
  20         progname = match.group(1)
  21         progversion = (int(match.group(2)) << 64) |\
  22                       (int(match.group(3)) << 48) |\
  23                       (int(match.group(4)) << 32) |\
  24                       (int(match.group(5)) << 16)
  25         return (progname, progversion)
  26
  27 def parseVer_123(match, filepath):
  28         progname = match.group(1)
  29         try:
  30                 patchlevel = match.group(5)
  31         except (IndexError), e:
  32                 patchlevel = None
  33         if patchlevel:
  34                 patchlevel = ord(patchlevel[0])
  35         else:
  36                 patchlevel = 0
  37         progversion = (int(match.group(2)) << 64) |\
  38                       (int(match.group(3)) << 48) |\
  39                       (int(match.group(4)) << 32) |\
  40                       patchlevel
  41         return (progname, progversion)
  42
  43 def parseVer_12(match, filepath):
  44         progname = match.group(1)
  45         try:
  46                 patchlevel = match.group(4)
  47         except (IndexError), e:
  48                 patchlevel = None
  49         if patchlevel:
  50                 patchlevel = ord(patchlevel[0])
  51         else:
  52                 patchlevel = 0
  53         progversion = (int(match.group(2)) << 64) |\
  54                       (int(match.group(3)) << 48) |\
  55                       patchlevel
  56         return (progname, progversion)
  57
  58 def parseVer_r(match, filepath):
  59         progname = match.group(1)
  60         progversion = (int(match.group(2)) << 64)
  61         return (progname, progversion)
  62
  63 def parseVer_ymd(match, filepath):
  64         progname = match.group(1)
  65         progversion = (int(match.group(2)) << 64) |\
  66                       (int(match.group(3)) << 48) |\
  67                       (int(match.group(4)) << 32)
  68         return (progname, progversion)
  69
  70 def parseVer_GIT(match, filepath):
  71         progname = match.group(1)
  72         st = os.stat(filepath)
  73         progversion = int(st.st_mtime) << 64
  74         return (progname, progversion)
  75
  76 extensions = (
  77         ".tar.gz",
  78         ".tar.bz2",
  79         ".tar.xz",
  80         ".orig.tar.gz",
  81         ".orig.tar.bz2",
  82         ".orig.tar.xz",
  83         ".zip",
  84         ".tgz",
  85         ".tbz",
  86         ".txz",
  87 )
  88
  89 versionRegex = (
  90         (re.compile(r"(.+)[-_](\d+)\.(\d+)\.(\d+)\.(\d+)"), parseVer_1234),     # xxx-1.2.3.4
  91         (re.compile(r"(.+)[-_](\d\d\d\d)-?(\d\d)-?(\d\d)"), parseVer_ymd),      # xxx-YYYY-MM-DD
  92         (re.compile(r"(.+)[-_]([0-9a-fA-F]{40,40})"), parseVer_GIT),            # xxx-GIT_SHASUM
  93         (re.compile(r"(.+)[-_](\d+)\.(\d+)\.(\d+)(\w?)"), parseVer_123),        # xxx-1.2.3a
  94         (re.compile(r"(.+)[-_](\d+)_(\d+)_(\d+)"), parseVer_123),               # xxx-1_2_3
  95         (re.compile(r"(.+)[-_](\d+)\.(\d+)(\w?)"), parseVer_12),                # xxx-1.2a
  96         (re.compile(r"(.+)[-_]r?(\d+)"), parseVer_r),                           # xxx-r1111
  97 )
  98
  99 blacklist = [
 100         ("linux",               re.compile(r"linux-.*")),
 101         ("gcc",                 re.compile(r"gcc-.*")),
 102         ("wl_apsta",            re.compile(r"wl_apsta.*")),
 103         (".fw",                 re.compile(r".*\.fw")),
 104         (".arm",                re.compile(r".*\.arm")),
 105         (".bin",                re.compile(r".*\.bin")),
 106         ("rt-firmware",         re.compile(r"RT[\d\w]+_Firmware.*")),
 107 ]
 108
 109 class EntryParseError(Exception): pass
 110
 111 class Entry:
 112         def __init__(self, directory, filename):
 113                 self.directory = directory
 114                 self.filename = filename
 115                 self.progname = ""
 116                 self.fileext = ""
 117
 118                 for ext in extensions:
 119                         if filename.endswith(ext):
 120                                 filename = filename[0:0-len(ext)]
 121                                 self.fileext = ext
 122                                 break
 123                 else:
 124                         print self.filename, "has an unknown file-extension"
 125                         raise EntryParseError("ext")
 126                 for (regex, parseVersion) in versionRegex:
 127                         match = regex.match(filename)
 128                         if match:
 129                                 (self.progname, self.version) = parseVersion(
 130                                         match, directory + "/" + filename + self.fileext)
 131                                 break
 132                 else:
 133                         print self.filename, "has an unknown version pattern"
 134                         raise EntryParseError("ver")
 135
 136         def deleteFile(self):
 137                 path = (self.directory + "/" + self.filename).replace("//", "/")
 138                 print "Deleting", path
 139                 if not opt_dryrun:
 140                         os.unlink(path)
 141
 142         def __eq__(self, y):
 143                 return self.filename == y.filename
 144
 145         def __ge__(self, y):
 146                 return self.version >= y.version
 147
 148 def usage():
 149         print "OpenWRT download directory cleanup utility"
 150         print "Usage: " + sys.argv[0] + " [OPTIONS] <path/to/dl>"
 151         print ""
 152         print " -d|--dry-run            Do a dry-run. Don't delete any files"
 153         print " -B|--show-blacklist     Show the blacklist and exit"
 154         print " -w|--whitelist ITEM     Remove ITEM from blacklist"
 155
 156 def main(argv):
 157         global opt_dryrun
 158
 159         try:
 160                 (opts, args) = getopt.getopt(argv[1:],
 161                         "hdBw:",
 162                         [ "help", "dry-run", "show-blacklist", "whitelist=", ])
 163                 if len(args) != 1:
 164                         usage()
 165                         return 1
 166         except getopt.GetoptError:
 167                 usage()
 168                 return 1
 169         directory = args[0]
 170         for (o, v) in opts:
 171                 if o in ("-h", "--help"):
 172                         usage()
 173                         return 0
 174                 if o in ("-d", "--dry-run"):
 175                         opt_dryrun = True
 176                 if o in ("-w", "--whitelist"):
 177                         for i in range(0, len(blacklist)):
 178                                 (name, regex) = blacklist[i]
 179                                 if name == v:
 180                                         del blacklist[i]
 181                                         break
 182                         else:
 183                                 print "Whitelist error: Item", v,\
 184                                       "is not in blacklist"
 185                                 return 1
 186                 if o in ("-B", "--show-blacklist"):
 187                         for (name, regex) in blacklist:
 188                                 print name
 189                         return 0
 190
 191         # Create a directory listing and parse the file names.
 192         entries = []
 193         for filename in os.listdir(directory):
 194                 if filename == "." or filename == "..":
 195                         continue
 196                 for (name, regex) in blacklist:
 197                         if regex.match(filename):
 198                                 if opt_dryrun:
 199                                         print filename, "is blacklisted"
 200                                 break
 201                 else:
 202                         try:
 203                                 entries.append(Entry(directory, filename))
 204                         except (EntryParseError), e: pass
 205
 206         # Create a map of programs
 207         progmap = {}
 208         for entry in entries:
 209                 if entry.progname in progmap.keys():
 210                         progmap[entry.progname].append(entry)
 211                 else:
 212                         progmap[entry.progname] = [entry,]
 213
 214         # Traverse the program map and delete everything but the last version
 215         for prog in progmap:
 216                 lastVersion = None
 217                 versions = progmap[prog]
 218                 for version in versions:
 219                         if lastVersion is None or version >= lastVersion:
 220                                 lastVersion = version
 221                 if lastVersion:
 222                         for version in versions:
 223                                 if version != lastVersion:
 224                                         version.deleteFile()
 225                         if opt_dryrun:
 226                                 print "Keeping", lastVersion.filename
 227
 228         return 0
 229
 230 if __name__ == "__main__":
 231         sys.exit(main(sys.argv))