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