lib/bup/cmd/ftp.py

   1 #!/bin/sh
   2 """": # -*-python-*-
   3 # https://sourceware.org/bugzilla/show_bug.cgi?id=26034
   4 export "BUP_ARGV_0"="$0"
   5 arg_i=1
   6 for arg in "$@"; do
   7     export "BUP_ARGV_${arg_i}"="$arg"
   8     shift
   9     arg_i=$((arg_i + 1))
  10 done
  11 # Here to end of preamble replaced during install
  12 bup_python="$(dirname "$0")/../../../config/bin/python" || exit $?
  13 exec "$bup_python" "$0"
  14 """
  15 # end of bup preamble
  16
  17 # For now, this completely relies on the assumption that the current
  18 # encoding (LC_CTYPE, etc.) is ASCII compatible, and that it returns
  19 # the exact same bytes from a decode/encode round-trip (or the reverse
  20 # (e.g. ISO-8859-1).
  21
  22 from __future__ import absolute_import, print_function
  23
  24 # Intentionally replace the dirname "$0" that python prepends
  25 import os, sys
  26 sys.path[0] = os.path.dirname(os.path.realpath(__file__)) + '/..'
  27
  28 import fnmatch, stat
  29
  30 from bup import _helpers, compat, options, git, shquote, ls, vfs
  31 from bup.compat import argv_bytes, fsdecode
  32 from bup.helpers import chunkyreader, handle_ctrl_c, log
  33 from bup.io import byte_stream, path_msg
  34 from bup.repo import LocalRepo
  35
  36 handle_ctrl_c()
  37
  38
  39 class OptionError(Exception):
  40     pass
  41
  42
  43 def do_ls(repo, args, out):
  44     try:
  45         opt = ls.opts_from_cmdline(args, onabort=OptionError)
  46     except OptionError as e:
  47         log('error: %s' % e)
  48         return
  49     return ls.within_repo(repo, opt, out)
  50
  51
  52 def write_to_file(inf, outf):
  53     for blob in chunkyreader(inf):
  54         outf.write(blob)
  55
  56
  57 def inputiter():
  58     if os.isatty(stdin.fileno()):
  59         while 1:
  60             if hasattr(_helpers, 'readline'):
  61                 try:
  62                     yield _helpers.readline(b'bup> ')
  63                 except EOFError:
  64                     print()  # Clear the line for the terminal's next prompt
  65                     break
  66             else:
  67                 out.write(b'bup> ')
  68                 out.flush()
  69                 read_line = stdin.readline()
  70                 if not read_line:
  71                     print('')
  72                     break
  73                 yield read_line
  74     else:
  75         for line in stdin:
  76             yield line
  77
  78
  79 def _completer_get_subs(repo, line):
  80     (qtype, lastword) = shquote.unfinished_word(line)
  81     dir, name = os.path.split(lastword)
  82     dir_path = vfs.resolve(repo, dir or b'/')
  83     _, dir_item = dir_path[-1]
  84     if not dir_item:
  85         subs = tuple()
  86     else:
  87         subs = tuple(dir_path + (entry,)
  88                      for entry in vfs.contents(repo, dir_item)
  89                      if (entry[0] != b'.' and entry[0].startswith(name)))
  90     return qtype, lastword, subs
  91
  92
  93 _attempt_start = None
  94 _attempt_end = None
  95 def attempt_completion(text, start, end):
  96     global _attempt_start, _attempt_end
  97     _attempt_start = start
  98     _attempt_end = end
  99     return None
 100
 101 _last_line = None
 102 _last_res = None
 103 def enter_completion(text, iteration):
 104     global repo
 105     global _attempt_end
 106     global _last_line
 107     global _last_res
 108     try:
 109         line = _helpers.get_line_buffer()[:_attempt_end]
 110         if _last_line != line:
 111             _last_res = _completer_get_subs(repo, line)
 112             _last_line = line
 113         qtype, lastword, subs = _last_res
 114         if iteration < len(subs):
 115             path = subs[iteration]
 116             leaf_name, leaf_item = path[-1]
 117             res = vfs.try_resolve(repo, leaf_name, parent=path[:-1])
 118             leaf_name, leaf_item = res[-1]
 119             fullname = os.path.join(*(name for name, item in res))
 120             if stat.S_ISDIR(vfs.item_mode(leaf_item)):
 121                 ret = shquote.what_to_add(qtype, lastword, fullname + b'/',
 122                                           terminate=False)
 123             else:
 124                 ret = shquote.what_to_add(qtype, lastword, fullname,
 125                                           terminate=True) + b' '
 126             return text + ret
 127     except Exception as e:
 128         log('\n')
 129         try:
 130             import traceback
 131             traceback.print_tb(sys.exc_traceback)
 132         except Exception as e2:
 133             log('Error printing traceback: %s\n' % e2)
 134         log('\nError in completion: %s\n' % e)
 135
 136
 137 optspec = """
 138 bup ftp [commands...]
 139 """
 140 o = options.Options(optspec)
 141 opt, flags, extra = o.parse(compat.argv[1:])
 142
 143 git.check_repo_or_die()
 144
 145 sys.stdout.flush()
 146 out = byte_stream(sys.stdout)
 147 stdin = byte_stream(sys.stdin)
 148 repo = LocalRepo()
 149 pwd = vfs.resolve(repo, b'/')
 150 rv = 0
 151
 152
 153
 154 if extra:
 155     lines = (argv_bytes(arg) for arg in extra)
 156 else:
 157     if hasattr(_helpers, 'readline'):
 158         _helpers.set_completer_word_break_characters(b' \t\n\r/')
 159         _helpers.set_attempted_completion_function(attempt_completion)
 160         _helpers.set_completion_entry_function(enter_completion)
 161         if sys.platform.startswith('darwin'):
 162             # MacOS uses a slightly incompatible clone of libreadline
 163             _helpers.parse_and_bind(b'bind ^I rl_complete')
 164         _helpers.parse_and_bind(b'tab: complete')
 165     lines = inputiter()
 166
 167 for line in lines:
 168     if not line.strip():
 169         continue
 170     words = [word for (wordstart,word) in shquote.quotesplit(line)]
 171     cmd = words[0].lower()
 172     #log('execute: %r %r\n' % (cmd, parm))
 173     try:
 174         if cmd == b'ls':
 175             # FIXME: respect pwd (perhaps via ls accepting resolve path/parent)
 176             do_ls(repo, words[1:], out)
 177             out.flush()
 178         elif cmd == b'cd':
 179             np = pwd
 180             for parm in words[1:]:
 181                 res = vfs.resolve(repo, parm, parent=np)
 182                 _, leaf_item = res[-1]
 183                 if not leaf_item:
 184                     raise Exception('%s does not exist'
 185                                     % path_msg(b'/'.join(name for name, item
 186                                                          in res)))
 187                 if not stat.S_ISDIR(vfs.item_mode(leaf_item)):
 188                     raise Exception('%s is not a directory' % path_msg(parm))
 189                 np = res
 190             pwd = np
 191         elif cmd == b'pwd':
 192             if len(pwd) == 1:
 193                 out.write(b'/')
 194             out.write(b'/'.join(name for name, item in pwd) + b'\n')
 195             out.flush()
 196         elif cmd == b'cat':
 197             for parm in words[1:]:
 198                 res = vfs.resolve(repo, parm, parent=pwd)
 199                 _, leaf_item = res[-1]
 200                 if not leaf_item:
 201                     raise Exception('%s does not exist' %
 202                                     path_msg(b'/'.join(name for name, item
 203                                                        in res)))
 204                 with vfs.fopen(repo, leaf_item) as srcfile:
 205                     write_to_file(srcfile, out)
 206             out.flush()
 207         elif cmd == b'get':
 208             if len(words) not in [2,3]:
 209                 rv = 1
 210                 raise Exception('Usage: get <filename> [localname]')
 211             rname = words[1]
 212             (dir,base) = os.path.split(rname)
 213             lname = len(words) > 2 and words[2] or base
 214             res = vfs.resolve(repo, rname, parent=pwd)
 215             _, leaf_item = res[-1]
 216             if not leaf_item:
 217                 raise Exception('%s does not exist' %
 218                                 path_msg(b'/'.join(name for name, item in res)))
 219             with vfs.fopen(repo, leaf_item) as srcfile:
 220                 with open(lname, 'wb') as destfile:
 221                     log('Saving %s\n' % path_msg(lname))
 222                     write_to_file(srcfile, destfile)
 223         elif cmd == b'mget':
 224             for parm in words[1:]:
 225                 dir, base = os.path.split(parm)
 226
 227                 res = vfs.resolve(repo, dir, parent=pwd)
 228                 _, dir_item = res[-1]
 229                 if not dir_item:
 230                     raise Exception('%s does not exist' % path_msg(dir))
 231                 for name, item in vfs.contents(repo, dir_item):
 232                     if name == b'.':
 233                         continue
 234                     if fnmatch.fnmatch(name, base):
 235                         if stat.S_ISLNK(vfs.item_mode(item)):
 236                             deref = vfs.resolve(repo, name, parent=res)
 237                             deref_name, deref_item = deref[-1]
 238                             if not deref_item:
 239                                 raise Exception('%s does not exist' %
 240                                                 path_msg('/'.join(name for name, item
 241                                                                   in deref)))
 242                             item = deref_item
 243                         with vfs.fopen(repo, item) as srcfile:
 244                             with open(name, 'wb') as destfile:
 245                                 log('Saving %s\n' % path_msg(name))
 246                                 write_to_file(srcfile, destfile)
 247         elif cmd == b'help' or cmd == b'?':
 248             out.write(b'Commands: ls cd pwd cat get mget help quit\n')
 249             out.flush()
 250         elif cmd in (b'quit', b'exit', b'bye'):
 251             break
 252         else:
 253             rv = 1
 254             raise Exception('no such command %r' % cmd)
 255     except Exception as e:
 256         rv = 1
 257         log('error: %s\n' % e)
 258         raise
 259
 260 sys.exit(rv)