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141 lines
5.2 KiB
141 lines
5.2 KiB
#! /usr/bin/env python
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#
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# SCons - a Software Constructor
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#
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# Copyright (c) 2001 - 2017 The SCons Foundation
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
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# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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from __future__ import print_function
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__revision__ = "src/script/scons-configure-cache.py rel_3.0.0:4395:8972f6a2f699 2017/09/18 12:59:24 bdbaddog"
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__version__ = "3.0.0"
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__build__ = "rel_3.0.0:4395:8972f6a2f699"
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__buildsys__ = "ubuntu-16"
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__date__ = "2017/09/18 12:59:24"
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__developer__ = "bdbaddog"
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import argparse
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import glob
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import json
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import os
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def rearrange_cache_entries(current_prefix_len, new_prefix_len):
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print('Changing prefix length from', current_prefix_len, 'to', new_prefix_len)
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dirs = set()
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old_dirs = set()
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for file in glob.iglob(os.path.join('*', '*')):
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name = os.path.basename(file)
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dir = name[:current_prefix_len].upper()
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if dir not in old_dirs:
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print('Migrating', dir)
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old_dirs.add(dir)
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dir = name[:new_prefix_len].upper()
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if dir not in dirs:
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os.mkdir(dir)
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dirs.add(dir)
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os.rename(file, os.path.join(dir, name))
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# Now delete the original directories
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for dir in old_dirs:
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os.rmdir(dir)
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# This dictionary should have one entry per entry in the cache config
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# Each entry should have the following:
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# implicit - (optional) This is to allow adding a new config entry and also
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# changing the behaviour of the system at the same time. This
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# indicates the value the config entry would have had if it had been
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# specified.
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# default - The value the config entry should have if it wasn't previously
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# specified
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# command-line - parameters to pass to ArgumentParser.add_argument
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# converter - (optional) Function to call if it's necessary to do some work
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# if this configuration entry changes
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config_entries = {
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'prefix_len' : {
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'implicit' : 1,
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'default' : 2 ,
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'command-line' : {
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'help' : 'Length of cache file name used as subdirectory prefix',
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'metavar' : '<number>',
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'type' : int
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},
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'converter' : rearrange_cache_entries
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}
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}
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parser = argparse.ArgumentParser(
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description = 'Modify the configuration of an scons cache directory',
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epilog = '''
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Unless you specify an option, it will not be changed (if it is
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already set in the cache config), or changed to an appropriate
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default (it it is not set).
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'''
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)
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parser.add_argument('cache-dir', help='Path to scons cache directory')
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for param in config_entries:
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parser.add_argument('--' + param.replace('_', '-'),
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**config_entries[param]['command-line'])
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parser.add_argument('--version', action='version', version='%(prog)s 1.0')
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# Get the command line as a dict without any of the unspecified entries.
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args = dict([x for x in vars(parser.parse_args()).items() if x[1]])
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# It seems somewhat strange to me, but positional arguments don't get the -
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# in the name changed to _, whereas optional arguments do...
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os.chdir(args['cache-dir'])
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del args['cache-dir']
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if not os.path.exists('config'):
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# Validate the only files in the directory are directories 0-9, a-f
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expected = [ '{:X}'.format(x) for x in range(0, 16) ]
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if not set(os.listdir('.')).issubset(expected):
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raise RuntimeError("This doesn't look like a version 1 cache directory")
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config = dict()
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else:
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with open('config') as conf:
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config = json.load(conf)
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# Find any keys that aren't currently set but should be
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for key in config_entries:
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if key not in config:
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if 'implicit' in config_entries[key]:
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config[key] = config_entries[key]['implicit']
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else:
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config[key] = config_entries[key]['default']
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if key not in args:
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args[key] = config_entries[key]['default']
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#Now we go through each entry in args to see if it changes an existing config
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#setting.
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for key in args:
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if args[key] != config[key]:
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if 'converter' in config_entries[key]:
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config_entries[key]['converter'](config[key], args[key])
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config[key] = args[key]
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# and write the updated config file
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with open('config', 'w') as conf:
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json.dump(config, conf)
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