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# Copyright (C) 2008 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""Import command classes."""
# There is a bug in git 1.5.4.3 and older by which unquoting a string consumes
# one extra character. Set this variable to True to work-around it. It only
# happens when renaming a file whose name contains spaces and/or quotes, and
# the symptom is:
# % git-fast-import
# fatal: Missing space after source: R "file 1.txt" file 2.txt
# http://git.kernel.org/?p=git/git.git;a=commit;h=c8744d6a8b27115503565041566d97c21e722584
GIT_FAST_IMPORT_NEEDS_EXTRA_SPACE_AFTER_QUOTE = False
# Lists of command names
COMMAND_NAMES = ['blob', 'checkpoint', 'commit', 'progress', 'reset', 'tag']
FILE_COMMAND_NAMES = ['filemodify', 'filedelete', 'filecopy', 'filerename',
'filedeleteall']
# Bazaar file kinds
FILE_KIND = 'file'
SYMLINK_KIND = 'symlink'
class ImportCommand(object):
"""Base class for import commands."""
def __init__(self, name):
self.name = name
# List of field names not to display
self._binary = []
def dump_str(self, names=None, child_lists=None, verbose=False):
"""Dump fields as a string.
:param names: the list of fields to include or
None for all public fields
:param child_lists: dictionary of child command names to
fields for that child command to include
:param verbose: if True, prefix each line with the command class and
display fields as a dictionary; if False, dump just the field
values with tabs between them
"""
interesting = {}
if names is None:
fields = [k for k in self.__dict__.keys() if not k.startswith('_')]
else:
fields = names
for field in fields:
value = self.__dict__.get(field)
if field in self._binary and value is not None:
value = '(...)'
interesting[field] = value
if verbose:
return "%s: %s" % (self.__class__.__name__, interesting)
else:
return "\t".join([repr(interesting[k]) for k in fields])
class BlobCommand(ImportCommand):
def __init__(self, mark, data, lineno=0):
ImportCommand.__init__(self, 'blob')
self.mark = mark
self.data = data
self.lineno = lineno
# Provide a unique id in case the mark is missing
if mark is None:
self.id = '@%d' % lineno
else:
self.id = ':' + mark
self._binary = ['data']
def __repr__(self):
if self.mark is None:
mark_line = ""
else:
mark_line = "\nmark :%s" % self.mark
return "blob%s\ndata %d\n%s" % (mark_line, len(self.data), self.data)
class CheckpointCommand(ImportCommand):
def __init__(self):
ImportCommand.__init__(self, 'checkpoint')
def __repr__(self):
return "checkpoint"
class CommitCommand(ImportCommand):
def __init__(self, ref, mark, author, committer, message, from_,
merges, file_iter, lineno=0):
ImportCommand.__init__(self, 'commit')
self.ref = ref
self.mark = mark
self.author = author
self.committer = committer
self.message = message
self.from_ = from_
self.merges = merges
self.file_iter = file_iter
self.lineno = lineno
self._binary = ['file_iter']
# Provide a unique id in case the mark is missing
if mark is None:
self.id = '@%d' % lineno
else:
self.id = ':%s' % mark
def __repr__(self):
if self.mark is None:
mark_line = ""
else:
mark_line = "\nmark :%s" % self.mark
if self.author is None:
author_line = ""
else:
author_line = "\nauthor %s" % format_who_when(self.author)
committer = "committer %s" % format_who_when(self.committer)
if self.message is None:
msg_section = ""
else:
msg = self.message.encode('utf8')
msg_section = "\ndata %d\n%s" % (len(msg), msg)
if self.from_ is None:
from_line = ""
else:
from_line = "\nfrom %s" % self.from_
if self.merges is None:
merge_lines = ""
else:
merge_lines = "".join(["\nmerge %s" % (m,)
for m in self.merges])
if self.file_iter is None:
filecommands = ""
else:
filecommands = "".join(["\n%r" % (c,)
for c in iter(self.file_iter)])
return "commit %s%s%s\n%s%s%s%s%s" % (self.ref, mark_line, author_line,
committer, msg_section, from_line, merge_lines, filecommands)
def dump_str(self, names=None, child_lists=None, verbose=False):
result = [ImportCommand.dump_str(self, names, verbose=verbose)]
for f in iter(self.file_iter):
if child_lists is None:
continue
try:
child_names = child_lists[f.name]
except KeyError:
continue
result.append("\t%s" % f.dump_str(child_names, verbose=verbose))
return '\n'.join(result)
class ProgressCommand(ImportCommand):
def __init__(self, message):
ImportCommand.__init__(self, 'progress')
self.message = message
def __repr__(self):
return "progress %s" % (self.message,)
class ResetCommand(ImportCommand):
def __init__(self, ref, from_):
ImportCommand.__init__(self, 'reset')
self.ref = ref
self.from_ = from_
def __repr__(self):
if self.from_ is None:
from_line = ""
else:
# According to git-fast-import(1), the extra LF is optional here;
# however, versions of git up to 1.5.4.3 had a bug by which the LF
# was needed. Always emit it, since it doesn't hurt and maintains
# compatibility with older versions.
# http://git.kernel.org/?p=git/git.git;a=commit;h=655e8515f279c01f525745d443f509f97cd805ab
from_line = "\nfrom %s\n" % self.from_
return "reset %s%s" % (self.ref, from_line)
class TagCommand(ImportCommand):
def __init__(self, id, from_, tagger, message):
ImportCommand.__init__(self, 'tag')
self.id = id
self.from_ = from_
self.tagger = tagger
self.message = message
def __repr__(self):
if self.from_ is None:
from_line = ""
else:
from_line = "\nfrom %s" % self.from_
if self.tagger is None:
tagger_line = ""
else:
tagger_line = "\ntagger %s" % format_who_when(self.tagger)
if self.message is None:
msg_section = ""
else:
msg = self.message.encode('utf8')
msg_section = "\ndata %d\n%s" % (len(msg), msg)
return "tag %s%s%s%s" % (self.id, from_line, tagger_line, msg_section)
class FileCommand(ImportCommand):
"""Base class for file commands."""
pass
class FileModifyCommand(FileCommand):
def __init__(self, path, kind, is_executable, dataref, data):
# Either dataref or data should be null
FileCommand.__init__(self, 'filemodify')
self.path = check_path(path)
self.kind = kind
self.is_executable = is_executable
self.dataref = dataref
self.data = data
self._binary = ['data']
def __repr__(self):
if self.kind == 'symlink':
mode = "120000"
elif self.is_executable:
mode = "755"
else:
mode = "644"
if self.dataref is None:
dataref = "inline"
datastr = "\ndata %d\n%s" % (len(self.data), self.data)
else:
dataref = "%s" % (self.dataref,)
datastr = ""
path = format_path(self.path)
return "M %s %s %s%s" % (mode, dataref, path, datastr)
class FileDeleteCommand(FileCommand):
def __init__(self, path):
FileCommand.__init__(self, 'filedelete')
self.path = check_path(path)
def __repr__(self):
return "D %s" % (format_path(self.path),)
class FileCopyCommand(FileCommand):
def __init__(self, src_path, dest_path):
FileCommand.__init__(self, 'filecopy')
self.src_path = check_path(src_path)
self.dest_path = check_path(dest_path)
def __repr__(self):
return "C %s %s" % (
format_path(self.src_path, quote_spaces=True),
format_path(self.dest_path))
class FileRenameCommand(FileCommand):
def __init__(self, old_path, new_path):
FileCommand.__init__(self, 'filerename')
self.old_path = check_path(old_path)
self.new_path = check_path(new_path)
def __repr__(self):
return "R %s %s" % (
format_path(self.old_path, quote_spaces=True),
format_path(self.new_path))
class FileDeleteAllCommand(FileCommand):
def __init__(self):
FileCommand.__init__(self, 'filedeleteall')
def __repr__(self):
return "deleteall"
def check_path(path):
"""Check that a path is legal.
:return: the path if all is OK
:raise ValueError: if the path is illegal
"""
if path is None or path == '':
raise ValueError("illegal path '%s'" % path)
return path
def format_path(p, quote_spaces=False):
"""Format a path in utf8, quoting it if necessary."""
if '\n' in p:
import re
p = re.sub('\n', '\\n', p)
quote = True
else:
quote = p[0] == '"' or (quote_spaces and ' ' in p)
if quote:
extra = GIT_FAST_IMPORT_NEEDS_EXTRA_SPACE_AFTER_QUOTE and ' ' or ''
p = '"%s"%s' % (p, extra)
return p.encode('utf8')
def format_who_when(fields):
"""Format a tuple of name,email,secs-since-epoch,utc-offset-secs as a string."""
offset = fields[3]
if offset < 0:
offset_sign = '-'
offset = abs(offset)
else:
offset_sign = '+'
offset_hours = offset / 3600
offset_minutes = offset / 60 - offset_hours * 60
offset_str = "%s%02d%02d" % (offset_sign, offset_hours, offset_minutes)
name = fields[0]
if name == '':
sep = ''
else:
sep = ' '
result = "%s%s<%s> %d %s" % (name, sep, fields[1], fields[2], offset_str)
return result.encode('utf8')
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