mirror of
https://gitlab.com/ita1024/waf.git
synced 2024-11-23 02:16:01 +01:00
356 lines
8.1 KiB
Python
Executable File
356 lines
8.1 KiB
Python
Executable File
#!/usr/bin/env python
|
|
# encoding: utf-8
|
|
# Thomas Nagy, 2005-2016 (ita)
|
|
|
|
"""
|
|
|
|
ConfigSet: a special dict
|
|
|
|
The values put in :py:class:`ConfigSet` must be serializable (dicts, lists, strings)
|
|
"""
|
|
|
|
import copy, re, os
|
|
from waflib import Logs, Utils
|
|
re_imp = re.compile('^(#)*?([^#=]*?)\ =\ (.*?)$', re.M)
|
|
|
|
class ConfigSet(object):
|
|
"""
|
|
A copy-on-write dict with human-readable serialized format. The serialization format
|
|
is human-readable (python-like) and performed by using eval() and repr().
|
|
For high performance prefer pickle. Do not store functions as they are not serializable.
|
|
|
|
The values can be accessed by attributes or by keys::
|
|
|
|
from waflib.ConfigSet import ConfigSet
|
|
env = ConfigSet()
|
|
env.FOO = 'test'
|
|
env['FOO'] = 'test'
|
|
"""
|
|
__slots__ = ('table', 'parent')
|
|
def __init__(self, filename=None):
|
|
self.table = {}
|
|
"""
|
|
Internal dict holding the object values
|
|
"""
|
|
#self.parent = None
|
|
|
|
if filename:
|
|
self.load(filename)
|
|
|
|
def __contains__(self, key):
|
|
"""
|
|
Enables the *in* syntax::
|
|
|
|
if 'foo' in env:
|
|
print(env['foo'])
|
|
"""
|
|
if key in self.table: return True
|
|
try: return self.parent.__contains__(key)
|
|
except AttributeError: return False # parent may not exist
|
|
|
|
def keys(self):
|
|
"""Dict interface"""
|
|
keys = set()
|
|
cur = self
|
|
while cur:
|
|
keys.update(cur.table.keys())
|
|
cur = getattr(cur, 'parent', None)
|
|
keys = list(keys)
|
|
keys.sort()
|
|
return keys
|
|
|
|
def __iter__(self):
|
|
return iter(self.keys())
|
|
|
|
def __str__(self):
|
|
"""Text representation of the ConfigSet (for debugging purposes)"""
|
|
return "\n".join(["%r %r" % (x, self.__getitem__(x)) for x in self.keys()])
|
|
|
|
def __getitem__(self, key):
|
|
"""
|
|
Dictionary interface: get value from key::
|
|
|
|
def configure(conf):
|
|
conf.env['foo'] = {}
|
|
print(env['foo'])
|
|
"""
|
|
try:
|
|
while 1:
|
|
x = self.table.get(key)
|
|
if not x is None:
|
|
return x
|
|
self = self.parent
|
|
except AttributeError:
|
|
return []
|
|
|
|
def __setitem__(self, key, value):
|
|
"""
|
|
Dictionary interface: set value for key
|
|
"""
|
|
self.table[key] = value
|
|
|
|
def __delitem__(self, key):
|
|
"""
|
|
Dictionary interface: mark the key as missing
|
|
"""
|
|
self[key] = []
|
|
|
|
def __getattr__(self, name):
|
|
"""
|
|
Attribute access provided for convenience. The following forms are equivalent::
|
|
|
|
def configure(conf):
|
|
conf.env.value
|
|
conf.env['value']
|
|
"""
|
|
if name in self.__slots__:
|
|
return object.__getattr__(self, name)
|
|
else:
|
|
return self[name]
|
|
|
|
def __setattr__(self, name, value):
|
|
"""
|
|
Attribute access provided for convenience. The following forms are equivalent::
|
|
|
|
def configure(conf):
|
|
conf.env.value = x
|
|
env['value'] = x
|
|
"""
|
|
if name in self.__slots__:
|
|
object.__setattr__(self, name, value)
|
|
else:
|
|
self[name] = value
|
|
|
|
def __delattr__(self, name):
|
|
"""
|
|
Attribute access provided for convenience. The following forms are equivalent::
|
|
|
|
def configure(conf):
|
|
del env.value
|
|
del env['value']
|
|
"""
|
|
if name in self.__slots__:
|
|
object.__delattr__(self, name)
|
|
else:
|
|
del self[name]
|
|
|
|
def derive(self):
|
|
"""
|
|
Returns a new ConfigSet deriving from self. The copy returned
|
|
will be a shallow copy::
|
|
|
|
from waflib.ConfigSet import ConfigSet
|
|
env = ConfigSet()
|
|
env.append_value('CFLAGS', ['-O2'])
|
|
child = env.derive()
|
|
child.CFLAGS.append('test') # warning! this will modify 'env'
|
|
child.CFLAGS = ['-O3'] # new list, ok
|
|
child.append_value('CFLAGS', ['-O3']) # ok
|
|
|
|
Use :py:func:`ConfigSet.detach` to detach the child from the parent.
|
|
"""
|
|
newenv = ConfigSet()
|
|
newenv.parent = self
|
|
return newenv
|
|
|
|
def detach(self):
|
|
"""
|
|
Detaches this instance from its parent (if present)
|
|
|
|
Modifying the parent :py:class:`ConfigSet` will not change the current object
|
|
Modifying this :py:class:`ConfigSet` will not modify the parent one.
|
|
"""
|
|
tbl = self.get_merged_dict()
|
|
try:
|
|
delattr(self, 'parent')
|
|
except AttributeError:
|
|
pass
|
|
else:
|
|
keys = tbl.keys()
|
|
for x in keys:
|
|
tbl[x] = copy.deepcopy(tbl[x])
|
|
self.table = tbl
|
|
return self
|
|
|
|
def get_flat(self, key):
|
|
"""
|
|
Returns a value as a string. If the input is a list, the value returned is space-separated.
|
|
|
|
:param key: key to use
|
|
:type key: string
|
|
"""
|
|
s = self[key]
|
|
if isinstance(s, str): return s
|
|
return ' '.join(s)
|
|
|
|
def _get_list_value_for_modification(self, key):
|
|
"""
|
|
Returns a list value for further modification.
|
|
|
|
The list may be modified inplace and there is no need to do this afterwards::
|
|
|
|
self.table[var] = value
|
|
"""
|
|
try:
|
|
value = self.table[key]
|
|
except KeyError:
|
|
try:
|
|
value = self.parent[key]
|
|
except AttributeError:
|
|
value = []
|
|
else:
|
|
if isinstance(value, list):
|
|
# force a copy
|
|
value = value[:]
|
|
else:
|
|
value = [value]
|
|
self.table[key] = value
|
|
else:
|
|
if not isinstance(value, list):
|
|
self.table[key] = value = [value]
|
|
return value
|
|
|
|
def append_value(self, var, val):
|
|
"""
|
|
Appends a value to the specified config key::
|
|
|
|
def build(bld):
|
|
bld.env.append_value('CFLAGS', ['-O2'])
|
|
|
|
The value must be a list or a tuple
|
|
"""
|
|
if isinstance(val, str): # if there were string everywhere we could optimize this
|
|
val = [val]
|
|
current_value = self._get_list_value_for_modification(var)
|
|
current_value.extend(val)
|
|
|
|
def prepend_value(self, var, val):
|
|
"""
|
|
Prepends a value to the specified item::
|
|
|
|
def configure(conf):
|
|
conf.env.prepend_value('CFLAGS', ['-O2'])
|
|
|
|
The value must be a list or a tuple
|
|
"""
|
|
if isinstance(val, str):
|
|
val = [val]
|
|
self.table[var] = val + self._get_list_value_for_modification(var)
|
|
|
|
def append_unique(self, var, val):
|
|
"""
|
|
Appends a value to the specified item only if it's not already present::
|
|
|
|
def build(bld):
|
|
bld.env.append_unique('CFLAGS', ['-O2', '-g'])
|
|
|
|
The value must be a list or a tuple
|
|
"""
|
|
if isinstance(val, str):
|
|
val = [val]
|
|
current_value = self._get_list_value_for_modification(var)
|
|
|
|
for x in val:
|
|
if x not in current_value:
|
|
current_value.append(x)
|
|
|
|
def get_merged_dict(self):
|
|
"""
|
|
Computes the merged dictionary from the fusion of self and all its parent
|
|
|
|
:rtype: a ConfigSet object
|
|
"""
|
|
table_list = []
|
|
env = self
|
|
while 1:
|
|
table_list.insert(0, env.table)
|
|
try: env = env.parent
|
|
except AttributeError: break
|
|
merged_table = {}
|
|
for table in table_list:
|
|
merged_table.update(table)
|
|
return merged_table
|
|
|
|
def store(self, filename):
|
|
"""
|
|
Serializes the :py:class:`ConfigSet` data to a file. See :py:meth:`ConfigSet.load` for reading such files.
|
|
|
|
:param filename: file to use
|
|
:type filename: string
|
|
"""
|
|
try:
|
|
os.makedirs(os.path.split(filename)[0])
|
|
except OSError:
|
|
pass
|
|
|
|
buf = []
|
|
merged_table = self.get_merged_dict()
|
|
keys = list(merged_table.keys())
|
|
keys.sort()
|
|
|
|
try:
|
|
fun = ascii
|
|
except NameError:
|
|
fun = repr
|
|
|
|
for k in keys:
|
|
if k != 'undo_stack':
|
|
buf.append('%s = %s\n' % (k, fun(merged_table[k])))
|
|
Utils.writef(filename, ''.join(buf))
|
|
|
|
def load(self, filename):
|
|
"""
|
|
Restores contents from a file (current values are not cleared). Files are written using :py:meth:`ConfigSet.store`.
|
|
|
|
:param filename: file to use
|
|
:type filename: string
|
|
"""
|
|
tbl = self.table
|
|
code = Utils.readf(filename, m='rU')
|
|
for m in re_imp.finditer(code):
|
|
g = m.group
|
|
tbl[g(2)] = eval(g(3))
|
|
Logs.debug('env: %s', self.table)
|
|
|
|
def update(self, d):
|
|
"""
|
|
Dictionary interface: replace values with the ones from another dict
|
|
|
|
:param d: object to use the value from
|
|
:type d: dict-like object
|
|
"""
|
|
self.table.update(d)
|
|
|
|
def stash(self):
|
|
"""
|
|
Stores the object state to provide transactionality semantics::
|
|
|
|
env = ConfigSet()
|
|
env.stash()
|
|
try:
|
|
env.append_value('CFLAGS', '-O3')
|
|
call_some_method(env)
|
|
finally:
|
|
env.revert()
|
|
|
|
The history is kept in a stack, and is lost during the serialization by :py:meth:`ConfigSet.store`
|
|
"""
|
|
orig = self.table
|
|
tbl = self.table = self.table.copy()
|
|
for x in tbl.keys():
|
|
tbl[x] = copy.deepcopy(tbl[x])
|
|
self.undo_stack = self.undo_stack + [orig]
|
|
|
|
def commit(self):
|
|
"""
|
|
Commits transactional changes. See :py:meth:`ConfigSet.stash`
|
|
"""
|
|
self.undo_stack.pop(-1)
|
|
|
|
def revert(self):
|
|
"""
|
|
Reverts the object to a previous state. See :py:meth:`ConfigSet.stash`
|
|
"""
|
|
self.table = self.undo_stack.pop(-1)
|
|
|