1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
|
# Copyright 2013-2014 Ben Longbons <b.r.longbons@gmail.com>
#
# This file is part of attoconf.
#
# attoconf 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 3 of the License, or
# (at your option) any later version.
#
# attoconf 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 attoconf. If not, see <http://www.gnu.org/licenses/>.
from collections import namedtuple, OrderedDict
import os
import sys
from .help import Help
# Nothing to see here. Move along.
Option = namedtuple('Option', ['type', 'init'])
class ArgumentError(Exception): pass
def as_var(name):
return name.lstrip('-').replace('-', '_').upper()
def trim_trailing_slashes(path):
p, s = os.path.split(path)
if not s:
return p
return path
class Project(object):
''' A Project is a directory and the list of options that can be set.
'''
__slots__ = (
'srcdir',
'aliases',
'options',
'help',
'order',
'checks',
)
def __init__(self, srcdir):
''' A Project is initially constructed from just the source directory
'''
self.srcdir = trim_trailing_slashes(srcdir)
self.aliases = {}
self.options = {}
self.help = Help()
self.order = []
self.checks = []
def add_help(self, text, hidden):
''' Directly add a line of text to the help.
'''
self.help.add_text(text, hidden)
def add_alias(self, key, expansion, help, hidden):
''' Add an alias.
This is necessary for anything to appear without an =.
The expansion is a list of other options, which may be aliases.
'''
if key in self.aliases:
raise KeyError(key)
expansion = list(expansion)
self.aliases[key] = expansion
if help is None:
help = 'alias for ' + ' '.join(expansion)
self.help.add_option(key, help, hidden)
def add_option(self, name, init, type, check,
help, hidden,
help_var=None, help_def=None):
''' Add an actual option.
This must be passed with a =.
In the builder, the var will first be set to init.
If the argument is passed, the type hook is called immediately
to validate the argument.
The check hooks will be called at final time,
in the order they were added.
Additionally, a line of help is added, with additional formatting.
'''
if name in self.options:
raise KeyError(name)
var = as_var(name)
if check is not None:
assert type.__module__ == 'attoconf.types'
else:
# used by some tests ... should this be fixed there instead?
if help_var is None:
help_var = var
assert init is not None
init = type(init)
assert init is not None
self.options[name] = Option(init=init, type=type)
if check is not None:
self.order.append(var)
self.checks.append(
lambda bld: check(bld, **{help_var: bld.vars[var]}))
if help_var is None:
help_var = var
if help_def is None:
help_def = init
assert help_def is not None
help = '%s [%s]' % (help, help_def)
if help_var != name:
help_opt = '%s=%s' % (name, help_var)
else:
help_opt = name
self.help.add_option(help_opt, help, hidden)
def do_help(self, opt):
''' Pseudo type-hook to be registered for --help (calls sys.exit).
'''
if opt == 'none':
return opt
if opt == 'default':
hidden = False
elif opt == 'hidden':
hidden = True
else:
raise ValueError('Unknown value for opt: %r' % opt)
self.help.print(sys.stdout, hidden)
sys.exit()
# sneaky
Project.do_help.__module__ = 'attoconf.types'
#Project.do_help.__func__.__module__ = 'attoconf.types'
class Build(object):
''' A Build is a directory and set of options applied to a Project.
'''
__slots__ = (
'builddir',
'project',
'vars',
'_seen_args',
)
def __init__(self, project, builddir):
''' A Build is initially constructed from a project and a build dir.
'''
self.project = project
self.builddir = trim_trailing_slashes(builddir)
self.vars = {as_var(k): o.init
for (k, o) in project.options.items()}
self._seen_args = OrderedDict()
def apply_arg(self, arg):
''' Parse a single argument, expanding aliases.
'''
alias = self.project.aliases.get(arg)
if alias is not None:
for e in alias:
# TODO: catch recursive aliases
# or should they be caught earlier?
self.apply_arg(e)
return
if '=' not in arg:
if arg in self.project.options:
raise ArgumentError('Option %s requires an argument' % arg)
elif arg.startswith('-'):
raise ArgumentError('Unknown option %s' % arg)
else:
raise ArgumentError('Unknown environment variable %s' % arg)
k, a = arg.split('=', 1)
if k in self._seen_args:
del self._seen_args[k]
self._seen_args[k] = a
opt = self.project.options.get(k)
if opt is None:
raise sys.exit('Unknown option %s' % k)
self.vars[as_var(k)] = opt.type(a)
def finish(self):
''' With the current set of variables, run all the checks
and presumably produce some sort of output.
'''
for check in self.project.checks:
check(self)
status_file = os.path.join(self.builddir, 'config.status')
# open fd to control +x mode
status_fd = os.open(status_file, os.O_WRONLY | os.O_CREAT | os.O_TRUNC, 0o777)
with os.fdopen(status_fd, 'w') as status:
print('Generating config.status')
status.write('#!%s\n' % sys.executable)
status.write('import os\n')
status.write('import sys\n')
status.write('old_build_dir = os.path.dirname(sys.argv[0])\n')
status.write('configure = os.path.join(old_build_dir, %r, "configure")\n'
% self.relative_source())
seen_args = ['='.join(kv) for kv in self._seen_args.items()]
status.write('os.execvp(configure, [configure] + %r + sys.argv[1:])\n'
% seen_args)
def configure(self, args, env):
''' First apply variables from the environment,
then call apply_arg() a bunch of times, then finish().
'''
for k in self.project.options:
if k != as_var(k):
continue
val = env.get(k)
if val is not None:
self._seen_args[k] = val
opt = self.project.options[k]
self.vars[as_var(k)] = opt.type(val)
for arg in args:
self.apply_arg(arg)
self.finish()
def relative_source(self):
''' Return a relative path from the build tree to the source tree.
'''
srcdir = self.project.srcdir
builddir = self.builddir
if os.path.isabs(srcdir) or os.path.isabs(builddir):
return os.path.realpath(srcdir)
return os.path.relpath(os.path.realpath(srcdir),
os.path.realpath(builddir))
|
