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