#
# core.py: public Python interface for core components
#
# Subversion is a tool for revision control.
# See http://subversion.tigris.org for more information.
#
######################################################################
#
# Copyright (c) 2003-2009 CollabNet. All rights reserved.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at http://subversion.tigris.org/license-1.html.
# If newer versions of this license are posted there, you may use a
# newer version instead, at your option.
#
######################################################################
from libsvn.core import *
import libsvn.core as _libsvncore
import atexit as _atexit
class SubversionException(Exception):
def __init__(self, message=None, apr_err=None, child=None,
file=None, line=None):
"""Initialize a new Subversion exception object.
Arguments:
message -- optional user-visible error message
apr_err -- optional integer error code (apr_status_t)
child -- optional SubversionException to wrap
file -- optional source file name where the error originated
line -- optional line number of the source file
file and line are for C, not Python; they are redundant to the
traceback information for exceptions raised in Python.
"""
# Be compatible with Subversion <1.5 .args behavior:
args = []
if message is not None or apr_err is not None:
args.append(message)
if apr_err is not None:
args.append(apr_err)
Exception.__init__(self, *args)
self.apr_err = apr_err
self.message = message
self.child = child
self.file = file
self.line = line
@classmethod
def _new_from_err_list(cls, errors):
"""Return new Subversion exception object from list of svn_error_t data.
This alternative constructor is for turning a chain of svn_error_t
objects in C into a chain of SubversionException objects in Python.
errors is a list of (apr_err, message, file, line) tuples, in order
from outer-most child to inner-most.
Use svn_swig_py_svn_exception rather than calling this directly.
Note: this modifies the errors list provided by the caller by
reversing it.
"""
child = None
errors.reverse()
for (apr_err, message, file, line) in errors:
child = cls(message, apr_err, child, file, line)
return child
def _cleanup_application_pool():
"""Cleanup the application pool before exiting"""
if application_pool and application_pool.valid():
application_pool.destroy()
_atexit.register(_cleanup_application_pool)
def _unprefix_names(symbol_dict, from_prefix, to_prefix = ''):
for name, value in symbol_dict.items():
if name.startswith(from_prefix):
symbol_dict[to_prefix + name[len(from_prefix):]] = value
Pool = _libsvncore.svn_pool_create
# Setup consistent names for revnum constants
SVN_IGNORED_REVNUM = SWIG_SVN_IGNORED_REVNUM
SVN_INVALID_REVNUM = SWIG_SVN_INVALID_REVNUM
def svn_path_compare_paths(path1, path2):
path1_len = len (path1);
path2_len = len (path2);
min_len = min(path1_len, path2_len)
i = 0
# Are the paths exactly the same?
if path1 == path2:
return 0
# Skip past common prefix
while (i < min_len) and (path1[i] == path2[i]):
i = i + 1
# Children of paths are greater than their parents, but less than
# greater siblings of their parents
char1 = '\0'
char2 = '\0'
if (i < path1_len):
char1 = path1[i]
if (i < path2_len):
char2 = path2[i]
if (char1 == '/') and (i == path2_len):
return 1
if (char2 == '/') and (i == path1_len):
return -1
if (i < path1_len) and (char1 == '/'):
return -1
if (i < path2_len) and (char2 == '/'):
return 1
# Common prefix was skipped above, next character is compared to
# determine order
return cmp(char1, char2)
def svn_mergeinfo_merge(mergeinfo, changes):
return _libsvncore.svn_swig_mergeinfo_merge(mergeinfo, changes)
def svn_mergeinfo_sort(mergeinfo):
return _libsvncore.svn_swig_mergeinfo_sort(mergeinfo)
def svn_rangelist_merge(rangelist, changes):
return _libsvncore.svn_swig_rangelist_merge(rangelist, changes)
def svn_rangelist_reverse(rangelist):
return _libsvncore.svn_swig_rangelist_reverse(rangelist)
class Stream:
"""A file-object-like wrapper for Subversion svn_stream_t objects."""
def __init__(self, stream):
self._stream = stream
def read(self, amt=None):
if amt is None:
# read the rest of the stream
chunks = [ ]
while 1:
data = svn_stream_read(self._stream, SVN_STREAM_CHUNK_SIZE)
if not data:
break
chunks.append(data)
return ''.join(chunks)
# read the amount specified
return svn_stream_read(self._stream, int(amt))
def write(self, buf):
### what to do with the amount written? (the result value)
svn_stream_write(self._stream, buf)
def secs_from_timestr(svn_datetime, pool=None):
"""Convert a Subversion datetime string into seconds since the Epoch."""
aprtime = svn_time_from_cstring(svn_datetime, pool)
# ### convert to a time_t; this requires intimate knowledge of
# ### the apr_time_t type
# ### aprtime is microseconds; turn it into seconds
return aprtime / 1000000
# ============================================================================
# Variations on this code are used in other places:
# - subversion/build/generator/gen_win.py
# - cvs2svn/cvs2svn
# Names that are not to be exported
import sys as _sys
if _sys.platform == "win32":
import re as _re
_escape_shell_arg_re = _re.compile(r'(\\+)(\"|$)')
def escape_shell_arg(arg):
# The (very strange) parsing rules used by the C runtime library are
# described at:
# http://msdn.microsoft.com/library/en-us/vclang/html/_pluslang_Parsing_C.2b2b_.Command.2d.Line_Arguments.asp
# double up slashes, but only if they are followed by a quote character
arg = _re.sub(_escape_shell_arg_re, r'\1\1\2', arg)
# surround by quotes and escape quotes inside
arg = '"' + arg.replace('"', '"^""') + '"'
return arg
def argv_to_command_string(argv):
"""Flatten a list of command line arguments into a command string.
The resulting command string is expected to be passed to the system
shell which os functions like popen() and system() invoke internally.
"""
# According cmd's usage notes (cmd /?), it parses the command line by
# "seeing if the first character is a quote character and if so, stripping
# the leading character and removing the last quote character."
# So to prevent the argument string from being changed we add an extra set
# of quotes around it here.
return '"' + " ".join(map(escape_shell_arg, argv)) + '"'
else:
def escape_shell_arg(str):
return "'" + str.replace("'", "'\\''") + "'"
def argv_to_command_string(argv):
"""Flatten a list of command line arguments into a command string.
The resulting command string is expected to be passed to the system
shell which os functions like popen() and system() invoke internally.
"""
return " ".join(map(escape_shell_arg, argv))
# ============================================================================
# Deprecated functions
def apr_initialize():
"""Deprecated. APR is now initialized automatically. This is
a compatibility wrapper providing the interface of the
Subversion 1.2.x and earlier bindings."""
pass
def apr_terminate():
"""Deprecated. APR is now terminated automatically. This is
a compatibility wrapper providing the interface of the
Subversion 1.2.x and earlier bindings."""
pass
def svn_pool_create(parent_pool=None):
"""Deprecated. Use Pool() instead. This is a compatibility
wrapper providing the interface of the Subversion 1.2.x and
earlier bindings."""
return Pool(parent_pool)
def svn_pool_destroy(pool):
"""Deprecated. Pools are now destroyed automatically. If you
want to manually destroy a pool, use Pool.destroy. This is
a compatibility wrapper providing the interface of the
Subversion 1.2.x and earlier bindings."""
assert pool is not None
# New in 1.3.x: All pools are automatically destroyed when Python shuts
# down. For compatibility with 1.2.x, we won't report an error if your
# app tries to destroy a pool during the shutdown process. Instead, we
# check to make sure the application_pool is still around before calling
# pool.destroy().
if application_pool and application_pool.valid():
pool.destroy()
apr_pool_destroy = svn_pool_destroy
def svn_pool_clear(pool):
"""Deprecated. Use Pool.clear instead. This is a compatibility
wrapper providing the interface of the Subversion 1.2.x and
earlier bindings."""
assert pool is not None
pool.clear()
apr_pool_clear = svn_pool_clear
def run_app(func, *args, **kw):
'''Deprecated: Application-level pools are now created
automatically. APR is also initialized and terminated
automatically. This is a compatibility wrapper providing the
interface of the Subversion 1.2.x and earlier bindings.
Run a function as an "APR application".
APR is initialized, and an application pool is created. Cleanup is
performed as the function exits (normally or via an exception).
'''
return func(application_pool, *args, **kw)
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