zeroinstall/zerostore/cli.py

   1 """Code for the B{0store} command-line interface."""
   2
   3 # Copyright (C) 2006, Thomas Leonard
   4 # See the README file for details, or visit http://0install.net.
   5
   6 import sys, os
   7 from zeroinstall.zerostore.manifest import verify, get_algorithm, copy_tree_with_verify
   8 from zeroinstall import zerostore, SafeException, support
   9
  10 stores = None
  11
  12 def init_stores():
  13         global stores
  14         assert stores is None
  15         if stores is None:
  16                 stores = zerostore.Stores()
  17
  18 class UsageError(SafeException): pass
  19
  20 def do_manifest(args):
  21         """manifest DIRECTORY [ALGORITHM]"""
  22         if len(args) < 1 or len(args) > 2: raise UsageError("Wrong number of arguments")
  23         if len(args) == 2:
  24                 alg = get_algorithm(args[1])
  25         else:
  26                 # If no algorithm was given, guess from the directory name
  27                 name = os.path.basename(args[0])
  28                 if '=' in name:
  29                         alg = get_algorithm(name.split('=', 1)[0])
  30                 else:
  31                         alg = get_algorithm('sha1new')
  32         digest = alg.new_digest()
  33         for line in alg.generate_manifest(args[0]):
  34                 print line
  35                 digest.update(line + '\n')
  36         print alg.getID(digest)
  37         sys.exit(0)
  38
  39 def do_find(args):
  40         """find DIGEST"""
  41         if len(args) != 1: raise UsageError("Wrong number of arguments")
  42         try:
  43                 print stores.lookup(args[0])
  44                 sys.exit(0)
  45         except zerostore.BadDigest, ex:
  46                 print >>sys.stderr, ex
  47         except zerostore.NotStored, ex:
  48                 print >>sys.stderr, ex
  49         sys.exit(1)
  50
  51 def do_add(args):
  52         """add DIGEST (DIRECTORY | (ARCHIVE [EXTRACT]))"""
  53         from zeroinstall.zerostore import unpack
  54         if len(args) < 2: raise UsageError("Missing arguments")
  55         digest = args[0]
  56         if os.path.isdir(args[1]):
  57                 if len(args) > 2: raise UsageError("Too many arguments")
  58                 stores.add_dir_to_cache(digest, args[1])
  59         elif os.path.isfile(args[1]):
  60                 if len(args) > 3: raise UsageError("Too many arguments")
  61                 if len(args) > 2:
  62                         extract = args[2]
  63                 else:
  64                         extract = None
  65
  66                 type = unpack.type_from_url(args[1])
  67                 if not type:
  68                         raise SafeException("Unknown extension in '%s' - can't guess MIME type" % args[1])
  69                 unpack.check_type_ok(type)
  70
  71                 stores.add_archive_to_cache(digest, file(args[1]), args[1], extract, type = type)
  72         else:
  73                 try:
  74                         os.stat(args[1])
  75                 except OSError, ex:
  76                         if ex.errno != 2:                       # No such file or directory
  77                                 raise UsageError(str(ex))       # E.g. permission denied
  78                 raise UsageError("No such file or directory '%s'" % args[1])
  79
  80 def do_optimise(args):
  81         """optimise [ CACHE ]"""
  82         if len(args) == 1:
  83                 cache_dir = args[0]
  84         else:
  85                 cache_dir = stores.stores[0].dir
  86
  87         cache_dir = os.path.realpath(cache_dir)
  88
  89         import stat
  90         info = os.stat(cache_dir)
  91         if not stat.S_ISDIR(info.st_mode):
  92                 raise UsageError("Not a directory: '%s'" % cache_dir)
  93
  94         impl_name = os.path.basename(cache_dir)
  95         if impl_name != 'implementations':
  96                 raise UsageError("Cache directory should be named 'implementations', not\n"
  97                                 "'%s' (in '%s')" % (impl_name, cache_dir))
  98
  99         print "Optimising", cache_dir
 100
 101         import optimise
 102         uniq_size, dup_size, already_linked, man_size = optimise.optimise(cache_dir)
 103         print "Original size  :", support.pretty_size(uniq_size + dup_size) + " (excluding the %s of manifests)" % support.pretty_size(man_size)
 104         print "Already saved  :", support.pretty_size(already_linked)
 105         if dup_size == 0:
 106                 print "No duplicates found; no changes made."
 107         else:
 108                 print "Optimised size :", support.pretty_size(uniq_size)
 109                 perc = (100 * float(dup_size)) / (uniq_size + dup_size)
 110                 print "Space freed up :", support.pretty_size(dup_size), "(%.2f%%)" % perc
 111         print "Optimisation complete."
 112
 113 def do_verify(args):
 114         """verify (DIGEST | (DIRECTORY [DIGEST])"""
 115         if len(args) == 2:
 116                 required_digest = args[1]
 117                 root = args[0]
 118         elif len(args) == 1:
 119                 root = get_stored(args[0])
 120                 required_digest = None          # Get from name
 121         else:
 122              raise UsageError("Missing DIGEST or DIRECTORY")
 123
 124         print "Verifying", root
 125         try:
 126                 verify(root, required_digest)
 127                 print "OK"
 128         except zerostore.BadDigest, ex:
 129                 print str(ex)
 130                 if ex.detail:
 131                         print
 132                         print ex.detail
 133                         sys.exit(1)
 134
 135 def show_changes(actual, saved):
 136         import difflib
 137         for line in difflib.unified_diff(saved, actual, 'Recorded', 'Actual'):
 138                 print line,
 139
 140 def do_list(args):
 141         """list"""
 142         if args: raise UsageError("List takes no arguments")
 143         print "User store (writable) : " + stores.stores[0].dir
 144         for s in stores.stores[1:]:
 145                 print "System store          : " + s.dir
 146         if len(stores.stores) < 2:
 147                 print "No system stores."
 148
 149 def get_stored(dir_or_digest):
 150         if os.path.isdir(dir_or_digest):
 151                 return dir_or_digest
 152         else:
 153                 try:
 154                         return stores.lookup(dir_or_digest)
 155                 except zerostore.NotStored, ex:
 156                         print >>sys.stderr, ex
 157                 sys.exit(1)
 158
 159 def do_copy(args):
 160         """copy SOURCE [ TARGET ]"""
 161         if len(args) == 2:
 162                 source, target = args
 163         elif len(args) == 1:
 164                 source = args[0]
 165                 target = stores.stores[0].dir
 166         else:
 167                 raise UsageError("Wrong number of arguments.")
 168
 169         if not os.path.isdir(source):
 170                 raise UsageError("Source directory '%s' not found" % source)
 171         if not os.path.isdir(target):
 172                 raise UsageError("Target directory '%s' not found" % target)
 173         manifest_path = os.path.join(source, '.manifest')
 174         if not os.path.isfile(manifest_path):
 175                 raise UsageError("Source manifest '%s' not found" % manifest_path)
 176         required_digest = os.path.basename(source)
 177         manifest_data = file(manifest_path).read()
 178
 179         copy_tree_with_verify(source, target, manifest_data, required_digest)
 180
 181 def do_manage(args):
 182         """manage"""
 183         if args:
 184                 raise UsageError("manage command takes no arguments")
 185
 186         import pygtk
 187         pygtk.require('2.0')
 188         import gtk
 189         from zeroinstall.gtkui import cache
 190         from zeroinstall.injector.iface_cache import iface_cache
 191         cache_explorer = cache.CacheExplorer(iface_cache)
 192         cache_explorer.window.connect('destroy', gtk.main_quit)
 193         cache_explorer.show()
 194         gtk.main()
 195
 196 commands = [do_add, do_copy, do_find, do_list, do_manifest, do_optimise, do_verify, do_manage]