aboutsummaryrefslogtreecommitdiff
path: root/pugl/waflib/ConfigSet.py
diff options
context:
space:
mode:
authorGravatar Hanspeter Portner <dev@open-music-kontrollers.ch>2019-08-19 20:53:29 +0200
committerGravatar Hanspeter Portner <dev@open-music-kontrollers.ch>2019-08-19 20:53:29 +0200
commit0fbf71650d271164b73e266c301fee4db50bd28a (patch)
tree4d5d22ad43852784bb598854305e0d6ae6cde76e /pugl/waflib/ConfigSet.py
parentdbfdd29ce534dcacf069223612d8bb7febab40e0 (diff)
parente8c89d26cc9e90ab8fa8673bf4f72271549f4946 (diff)
downloadd2tk-0fbf71650d271164b73e266c301fee4db50bd28a.zip
d2tk-0fbf71650d271164b73e266c301fee4db50bd28a.tar.gz
d2tk-0fbf71650d271164b73e266c301fee4db50bd28a.tar.bz2
d2tk-0fbf71650d271164b73e266c301fee4db50bd28a.tar.xz
Merge commit 'e8c89d26cc9e90ab8fa8673bf4f72271549f4946' into pugl_upstream
Diffstat (limited to 'pugl/waflib/ConfigSet.py')
-rw-r--r--pugl/waflib/ConfigSet.py361
1 files changed, 361 insertions, 0 deletions
diff --git a/pugl/waflib/ConfigSet.py b/pugl/waflib/ConfigSet.py
new file mode 100644
index 0000000..901fba6
--- /dev/null
+++ b/pugl/waflib/ConfigSet.py
@@ -0,0 +1,361 @@
+#!/usr/bin/env python
+# encoding: utf-8
+# Thomas Nagy, 2005-2018 (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(r'^(#)*?([^#=]*?)\ =\ (.*?)$', 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 from key
+ """
+ self.table[key] = value
+
+ def __delitem__(self, key):
+ """
+ Dictionary interface: mark the value 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.__getattribute__(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='r')
+ 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)
+