1 # Copyright (C) 2012 W. Trevor King
3 # This file is part of update-copyright.
5 # update-copyright is free software: you can redistribute it and/or
6 # modify it under the terms of the GNU General Public License as
7 # published by the Free Software Foundation, either version 3 of the
8 # License, or (at your option) any later version.
10 # update-copyright is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 # General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with update-copyright. If not, see
17 # <http://www.gnu.org/licenses/>.
19 """Useful utilities for backend classes."""
21 import email.utils as _email_utils
22 import os.path as _os_path
23 import subprocess as _subprocess
26 from ..utils import ENCODING as _ENCODING
29 _MSWINDOWS = _sys.platform == 'win32'
30 _POSIX = not _MSWINDOWS
33 def invoke(args, stdin=None, stdout=_subprocess.PIPE, stderr=_subprocess.PIPE,
34 expect=(0,), unicode_output=False, encoding=None):
35 """Invoke an external program and return the results
37 ``expect`` should be a tuple of allowed exit codes.
39 When ``unicode_output`` is ``True``, convert stdout and stdin
40 strings to unicode before returing them.
44 q = _subprocess.Popen(args, stdin=_subprocess.PIPE,
45 stdout=stdout, stderr=stderr)
47 assert _MSWINDOWS == True, 'invalid platform'
48 # win32 don't have os.execvp() so run the command in a shell
49 q = _subprocess.Popen(args, stdin=_subprocess.PIPE,
50 stdout=stdout, stderr=stderr, shell=True)
52 raise ValueError([args, e])
53 stdout,stderr = q.communicate(input=stdin)
55 if unicode_output == True:
58 if stdout is not None:
59 stdout = unicode(stdout, encoding)
60 if stderr is not None:
61 stderr = unicode(stderr, encoding)
62 if status not in expect:
63 raise ValueError([args, status, stdout, stderr])
64 return status, stdout, stderr
67 """Recursively split a path into elements.
73 >>> splitpath(os.path.join('a', 'b', 'c'))
75 >>> splitpath(os.path.join('.', 'a', 'b', 'c'))
78 path = _os_path.normpath(path)
81 dirname,basename = _os_path.split(path)
82 elements.insert(0,basename)
83 if dirname in ['', '.']:
86 return tuple(elements)
88 def strip_email(*args):
89 """Remove email addresses from a series of names.
94 >>> strip_email('J Doe')
96 >>> strip_email('J Doe <jdoe@a.com>')
98 >>> strip_email('J Doe <jdoe@a.com>', 'JJJ Smith <jjjs@a.com>')
99 ['J Doe', 'JJJ Smith']
102 for i,arg in enumerate(args):
105 author,addr = _email_utils.parseaddr(arg)
111 def reverse_aliases(aliases):
112 """Reverse an `aliases` dict.
114 Input: key: canonical name, value: list of aliases
115 Output: key: alias, value: canonical name
121 ... 'J Doe <jdoe@a.com>':['Johnny <jdoe@b.edu>', 'J'],
122 ... 'JJJ Smith <jjjs@a.com>':['Jingly <jjjs@b.edu>'],
123 ... None:['Anonymous <a@a.com>'],
125 >>> r = reverse_aliases(aliases)
126 >>> for item in sorted(r.items()):
128 ('Anonymous <a@a.com>', None)
129 ('J', 'J Doe <jdoe@a.com>')
130 ('Jingly <jjjs@b.edu>', 'JJJ Smith <jjjs@a.com>')
131 ('Johnny <jdoe@b.edu>', 'J Doe <jdoe@a.com>')
134 for canonical_name,_aliases in aliases.items():
135 for alias in _aliases:
136 output[alias] = canonical_name
139 def replace_aliases(authors, with_email=True, aliases=None):
140 """Consolidate and sort `authors`.
142 Make the replacements listed in the `aliases` dict (key: canonical
143 name, value: list of aliases). If `aliases` is ``None``, default
147 ... 'J Doe <jdoe@a.com>':['Johnny <jdoe@b.edu>'],
148 ... 'JJJ Smith <jjjs@a.com>':['Jingly <jjjs@b.edu>'],
149 ... None:['Anonymous <a@a.com>'],
152 ... 'JJJ Smith <jjjs@a.com>', 'Johnny <jdoe@b.edu>',
153 ... 'Jingly <jjjs@b.edu>', 'J Doe <jdoe@a.com>', 'Anonymous <a@a.com>']
154 >>> replace_aliases(authors, with_email=True, aliases=aliases)
155 ['J Doe <jdoe@a.com>', 'JJJ Smith <jjjs@a.com>']
156 >>> replace_aliases(authors, with_email=False, aliases=aliases)
157 ['J Doe', 'JJJ Smith']
161 rev_aliases = reverse_aliases(aliases)
162 for i,author in enumerate(authors):
163 if author in rev_aliases:
164 authors[i] = rev_aliases[author]
165 authors = sorted(list(set(authors)))
168 if with_email == False:
169 authors = strip_email(*authors)