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Diffstat (limited to 'cloudinit/distros/parsers/sys_conf.py')
| -rw-r--r-- | cloudinit/distros/parsers/sys_conf.py | 113 |
1 files changed, 0 insertions, 113 deletions
diff --git a/cloudinit/distros/parsers/sys_conf.py b/cloudinit/distros/parsers/sys_conf.py deleted file mode 100644 index 6157cf32..00000000 --- a/cloudinit/distros/parsers/sys_conf.py +++ /dev/null @@ -1,113 +0,0 @@ -# vi: ts=4 expandtab -# -# Copyright (C) 2012 Yahoo! Inc. -# -# Author: Joshua Harlow <harlowja@yahoo-inc.com> -# -# This program is free software: you can redistribute it and/or modify -# it under the terms of the GNU General Public License version 3, as -# published by the Free Software Foundation. -# -# 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, see <http://www.gnu.org/licenses/>. - -import six -from six import StringIO - -import pipes -import re - -# This library is used to parse/write -# out the various sysconfig files edited (best attempt effort) -# -# It has to be slightly modified though -# to ensure that all values are quoted/unquoted correctly -# since these configs are usually sourced into -# bash scripts... -import configobj - -# See: http://pubs.opengroup.org/onlinepubs/000095399/basedefs/xbd_chap08.html -# or look at the 'param_expand()' function in the subst.c file in the bash -# source tarball... -SHELL_VAR_RULE = r'[a-zA-Z_]+[a-zA-Z0-9_]*' -SHELL_VAR_REGEXES = [ - # Basic variables - re.compile(r"\$" + SHELL_VAR_RULE), - # Things like $?, $0, $-, $@ - re.compile(r"\$[0-9#\?\-@\*]"), - # Things like ${blah:1} - but this one - # gets very complex so just try the - # simple path - re.compile(r"\$\{.+\}"), -] - - -def _contains_shell_variable(text): - for r in SHELL_VAR_REGEXES: - if r.search(text): - return True - return False - - -class SysConf(configobj.ConfigObj): - def __init__(self, contents): - configobj.ConfigObj.__init__(self, contents, - interpolation=False, - write_empty_values=True) - - def __str__(self): - contents = self.write() - out_contents = StringIO() - if isinstance(contents, (list, tuple)): - out_contents.write("\n".join(contents)) - else: - out_contents.write(str(contents)) - return out_contents.getvalue() - - def _quote(self, value, multiline=False): - if not isinstance(value, six.string_types): - raise ValueError('Value "%s" is not a string' % (value)) - if len(value) == 0: - return '' - quot_func = None - if value[0] in ['"', "'"] and value[-1] in ['"', "'"]: - if len(value) == 1: - quot_func = (lambda x: self._get_single_quote(x) % x) - else: - # Quote whitespace if it isn't the start + end of a shell command - if value.strip().startswith("$(") and value.strip().endswith(")"): - pass - else: - if re.search(r"[\t\r\n ]", value): - if _contains_shell_variable(value): - # If it contains shell variables then we likely want to - # leave it alone since the pipes.quote function likes - # to use single quotes which won't get expanded... - if re.search(r"[\n\"']", value): - quot_func = (lambda x: - self._get_triple_quote(x) % x) - else: - quot_func = (lambda x: - self._get_single_quote(x) % x) - else: - quot_func = pipes.quote - if not quot_func: - return value - return quot_func(value) - - def _write_line(self, indent_string, entry, this_entry, comment): - # Ensure it is formatted fine for - # how these sysconfig scripts are used - val = self._decode_element(self._quote(this_entry)) - key = self._decode_element(self._quote(entry)) - cmnt = self._decode_element(comment) - return '%s%s%s%s%s' % (indent_string, - key, - self._a_to_u('='), - val, - cmnt) |