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