scripts/dl_cleanup.py

   1 #!/usr/bin/env python3
   2 """
   3 # OpenWrt download directory cleanup utility.
   4 # Delete all but the very last version of the program tarballs.
   5 #
   6 # Copyright (C) 2010-2015 Michael Buesch <m@bues.ch>
   7 # Copyright (C) 2013-2015 OpenWrt.org
   8 """
   9
  10 from __future__ import print_function
  11
  12 import sys
  13 import os
  14 import re
  15 import getopt
  16
  17 # Commandline options
  18 opt_dryrun = False
  19
  20
  21 def parseVer_1234(match, filepath):
  22         progname = match.group(1)
  23         progversion = (int(match.group(2)) << 64) |\
  24                       (int(match.group(3)) << 48) |\
  25                       (int(match.group(4)) << 32) |\
  26                       (int(match.group(5)) << 16)
  27         return (progname, progversion)
  28
  29 def parseVer_123(match, filepath):
  30         progname = match.group(1)
  31         try:
  32                 patchlevel = match.group(5)
  33         except IndexError as e:
  34                 patchlevel = None
  35         if patchlevel:
  36                 patchlevel = ord(patchlevel[0])
  37         else:
  38                 patchlevel = 0
  39         progversion = (int(match.group(2)) << 64) |\
  40                       (int(match.group(3)) << 48) |\
  41                       (int(match.group(4)) << 32) |\
  42                       patchlevel
  43         return (progname, progversion)
  44
  45 def parseVer_12(match, filepath):
  46         progname = match.group(1)
  47         try:
  48                 patchlevel = match.group(4)
  49         except IndexError as e:
  50                 patchlevel = None
  51         if patchlevel:
  52                 patchlevel = ord(patchlevel[0])
  53         else:
  54                 patchlevel = 0
  55         progversion = (int(match.group(2)) << 64) |\
  56                       (int(match.group(3)) << 48) |\
  57                       patchlevel
  58         return (progname, progversion)
  59
  60 def parseVer_r(match, filepath):
  61         progname = match.group(1)
  62         progversion = (int(match.group(2)) << 64)
  63         return (progname, progversion)
  64
  65 def parseVer_ymd_GIT_SHASUM(match, filepath):
  66         progname = match.group(1)
  67         progversion = (int(match.group(2)) << 64) |\
  68                       (int(match.group(3)) << 48) |\
  69                       (int(match.group(4)) << 32)
  70         return (progname, progversion)
  71
  72 def parseVer_ymd(match, filepath):
  73         progname = match.group(1)
  74         progversion = (int(match.group(2)) << 64) |\
  75                       (int(match.group(3)) << 48) |\
  76                       (int(match.group(4)) << 32)
  77         return (progname, progversion)
  78
  79 def parseVer_GIT(match, filepath):
  80         progname = match.group(1)
  81         st = os.stat(filepath)
  82         progversion = int(st.st_mtime) << 64
  83         return (progname, progversion)
  84
  85 extensions = (
  86         ".tar.gz",
  87         ".tar.bz2",
  88         ".tar.xz",
  89         ".orig.tar.gz",
  90         ".orig.tar.bz2",
  91         ".orig.tar.xz",
  92         ".zip",
  93         ".tgz",
  94         ".tbz",
  95         ".txz",
  96 )
  97
  98 versionRegex = (
  99         (re.compile(r"(.+)[-_](\d+)\.(\d+)\.(\d+)\.(\d+)"), parseVer_1234),     # xxx-1.2.3.4
 100         (re.compile(r"(.+)[-_](\d\d\d\d)-?(\d\d)-?(\d\d)-"), parseVer_ymd_GIT_SHASUM),  # xxx-YYYY-MM-DD-GIT_SHASUM
 101         (re.compile(r"(.+)[-_](\d\d\d\d)-?(\d\d)-?(\d\d)"), parseVer_ymd),      # xxx-YYYY-MM-DD
 102         (re.compile(r"(.+)[-_]([0-9a-fA-F]{40,40})"), parseVer_GIT),            # xxx-GIT_SHASUM
 103         (re.compile(r"(.+)[-_](\d+)\.(\d+)\.(\d+)(\w?)"), parseVer_123),        # xxx-1.2.3a
 104         (re.compile(r"(.+)[-_](\d+)_(\d+)_(\d+)"), parseVer_123),               # xxx-1_2_3
 105         (re.compile(r"(.+)[-_](\d+)\.(\d+)(\w?)"), parseVer_12),                # xxx-1.2a
 106         (re.compile(r"(.+)[-_]r?(\d+)"), parseVer_r),                           # xxx-r1111
 107 )
 108
 109 blacklist = [
 110         ("linux",               re.compile(r"linux-\d.*")),
 111         ("gcc",                 re.compile(r"gcc-.*")),
 112         ("wl_apsta",            re.compile(r"wl_apsta.*")),
 113         (".fw",                 re.compile(r".*\.fw")),
 114         (".arm",                re.compile(r".*\.arm")),
 115         (".bin",                re.compile(r".*\.bin")),
 116         ("rt-firmware",         re.compile(r"RT[\d\w]+_Firmware.*")),
 117 ]
 118
 119 class EntryParseError(Exception): pass
 120
 121 class Entry:
 122         def __init__(self, directory, filename):
 123                 self.directory = directory
 124                 self.filename = filename
 125                 self.progname = ""
 126                 self.fileext = ""
 127
 128                 for ext in extensions:
 129                         if filename.endswith(ext):
 130                                 filename = filename[0:0-len(ext)]
 131                                 self.fileext = ext
 132                                 break
 133                 else:
 134                         print(self.filename, "has an unknown file-extension")
 135                         raise EntryParseError("ext")
 136                 for (regex, parseVersion) in versionRegex:
 137                         match = regex.match(filename)
 138                         if match:
 139                                 (self.progname, self.version) = parseVersion(
 140                                         match, directory + "/" + filename + self.fileext)
 141                                 break
 142                 else:
 143                         print(self.filename, "has an unknown version pattern")
 144                         raise EntryParseError("ver")
 145
 146         def getPath(self):
 147                 return (self.directory + "/" + self.filename).replace("//", "/")
 148
 149         def deleteFile(self):
 150                 path = self.getPath()
 151                 print("Deleting", path)
 152                 if not opt_dryrun:
 153                         os.unlink(path)
 154
 155         def __ge__(self, y):
 156                 return self.version >= y.version
 157
 158 def usage():
 159         print("OpenWrt download directory cleanup utility")
 160         print("Usage: " + sys.argv[0] + " [OPTIONS] <path/to/dl>")
 161         print("")
 162         print(" -d|--dry-run            Do a dry-run. Don't delete any files")
 163         print(" -B|--show-blacklist     Show the blacklist and exit")
 164         print(" -w|--whitelist ITEM     Remove ITEM from blacklist")
 165
 166 def main(argv):
 167         global opt_dryrun
 168
 169         try:
 170                 (opts, args) = getopt.getopt(argv[1:],
 171                         "hdBw:",
 172                         [ "help", "dry-run", "show-blacklist", "whitelist=", ])
 173                 if len(args) != 1:
 174                         usage()
 175                         return 1
 176         except getopt.GetoptError as e:
 177                 usage()
 178                 return 1
 179         directory = args[0]
 180
 181         if not os.path.exists(directory):
 182                 print("Can't find dl path", directory)
 183                 return 1
 184
 185         for (o, v) in opts:
 186                 if o in ("-h", "--help"):
 187                         usage()
 188                         return 0
 189                 if o in ("-d", "--dry-run"):
 190                         opt_dryrun = True
 191                 if o in ("-w", "--whitelist"):
 192                         for i in range(0, len(blacklist)):
 193                                 (name, regex) = blacklist[i]
 194                                 if name == v:
 195                                         del blacklist[i]
 196                                         break
 197                         else:
 198                                 print("Whitelist error: Item", v,\
 199                                       "is not in blacklist")
 200                                 return 1
 201                 if o in ("-B", "--show-blacklist"):
 202                         for (name, regex) in blacklist:
 203                                 sep = "\t\t"
 204                                 if len(name) >= 8:
 205                                         sep = "\t"
 206                                 print("%s%s(%s)" % (name, sep, regex.pattern))
 207                         return 0
 208
 209         # Create a directory listing and parse the file names.
 210         entries = []
 211         for filename in os.listdir(directory):
 212                 if filename == "." or filename == "..":
 213                         continue
 214                 for (name, regex) in blacklist:
 215                         if regex.match(filename):
 216                                 if opt_dryrun:
 217                                         print(filename, "is blacklisted")
 218                                 break
 219                 else:
 220                         try:
 221                                 entries.append(Entry(directory, filename))
 222                         except EntryParseError as e:
 223                                 pass
 224
 225         # Create a map of programs
 226         progmap = {}
 227         for entry in entries:
 228                 if entry.progname in progmap.keys():
 229                         progmap[entry.progname].append(entry)
 230                 else:
 231                         progmap[entry.progname] = [entry,]
 232
 233         # Traverse the program map and delete everything but the last version
 234         for prog in progmap:
 235                 lastVersion = None
 236                 versions = progmap[prog]
 237                 for version in versions:
 238                         if lastVersion is None or version >= lastVersion:
 239                                 lastVersion = version
 240                 if lastVersion:
 241                         for version in versions:
 242                                 if version is not lastVersion:
 243                                         version.deleteFile()
 244                         if opt_dryrun:
 245                                 print("Keeping", lastVersion.getPath())
 246
 247         return 0
 248
 249 if __name__ == "__main__":
 250         sys.exit(main(sys.argv))