mirror of
https://gitlab.com/ita1024/waf.git
synced 2024-11-29 13:30:32 +01:00
939 lines
23 KiB
Python
939 lines
23 KiB
Python
#!/usr/bin/env python
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# encoding: utf-8
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# Thomas Nagy, 2005-2016 (ita)
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"""
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Node: filesystem structure
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#. Each file/folder is represented by exactly one node.
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#. Some potential class properties are stored on :py:class:`waflib.Build.BuildContext` : nodes to depend on, etc.
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Unused class members can increase the `.wafpickle` file size sensibly.
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#. Node objects should never be created directly, use
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the methods :py:func:`Node.make_node` or :py:func:`Node.find_node` for the low-level operations
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#. The methods :py:func:`Node.find_resource`, :py:func:`Node.find_dir` :py:func:`Node.find_or_declare` must be
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used when a build context is present
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#. Each instance of :py:class:`waflib.Context.Context` has a unique :py:class:`Node` subclass required for serialization.
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(:py:class:`waflib.Node.Nod3`, see the :py:class:`waflib.Context.Context` initializer). A reference to the context
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owning a node is held as *self.ctx*
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"""
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import os, re, sys, shutil
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from waflib import Utils, Errors
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exclude_regs = '''
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**/*~
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**/#*#
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**/.#*
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**/%*%
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**/._*
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**/CVS
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**/CVS/**
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**/.cvsignore
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**/SCCS
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**/SCCS/**
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**/vssver.scc
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**/.svn
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**/.svn/**
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**/BitKeeper
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**/.git
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**/.git/**
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**/.gitignore
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**/.bzr
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**/.bzrignore
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**/.bzr/**
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**/.hg
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**/.hg/**
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**/_MTN
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**/_MTN/**
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**/.arch-ids
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**/{arch}
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**/_darcs
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**/_darcs/**
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**/.intlcache
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**/.DS_Store'''
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"""
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Ant patterns for files and folders to exclude while doing the
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recursive traversal in :py:meth:`waflib.Node.Node.ant_glob`
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"""
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class Node(object):
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"""
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This class is organized in two parts:
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* The basic methods meant for filesystem access (compute paths, create folders, etc)
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* The methods bound to a :py:class:`waflib.Build.BuildContext` (require ``bld.srcnode`` and ``bld.bldnode``)
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"""
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dict_class = dict
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"""
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Subclasses can provide a dict class to enable case insensitivity for example.
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"""
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__slots__ = ('name', 'parent', 'children', 'cache_abspath', 'cache_isdir')
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def __init__(self, name, parent):
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"""
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.. note:: Use :py:func:`Node.make_node` or :py:func:`Node.find_node` instead of calling this constructor
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"""
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self.name = name
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self.parent = parent
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if parent:
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if name in parent.children:
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raise Errors.WafError('node %s exists in the parent files %r already' % (name, parent))
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parent.children[name] = self
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def __setstate__(self, data):
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"Deserializes node information, used for persistence"
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self.name = data[0]
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self.parent = data[1]
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if data[2] is not None:
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# Issue 1480
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self.children = self.dict_class(data[2])
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def __getstate__(self):
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"Serializes node information, used for persistence"
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return (self.name, self.parent, getattr(self, 'children', None))
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def __str__(self):
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"""
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String representation (abspath), for debugging purposes
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:rtype: string
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"""
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return self.abspath()
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def __repr__(self):
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"""
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String representation (abspath), for debugging purposes
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:rtype: string
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"""
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return self.abspath()
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def __copy__(self):
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"""
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Provided to prevent nodes from being copied
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:raises: :py:class:`waflib.Errors.WafError`
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"""
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raise Errors.WafError('nodes are not supposed to be copied')
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def read(self, flags='r', encoding='ISO8859-1'):
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"""
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Reads and returns the contents of the file represented by this node, see :py:func:`waflib.Utils.readf`::
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def build(bld):
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bld.path.find_node('wscript').read()
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:param flags: Open mode
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:type flags: string
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:param encoding: encoding value for Python3
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:type encoding: string
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:rtype: string or bytes
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:return: File contents
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"""
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return Utils.readf(self.abspath(), flags, encoding)
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def write(self, data, flags='w', encoding='ISO8859-1'):
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"""
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Writes data to the file represented by this node, see :py:func:`waflib.Utils.writef`::
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def build(bld):
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bld.path.make_node('foo.txt').write('Hello, world!')
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:param data: data to write
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:type data: string
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:param flags: Write mode
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:type flags: string
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:param encoding: encoding value for Python3
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:type encoding: string
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"""
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Utils.writef(self.abspath(), data, flags, encoding)
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def read_json(self, convert=True, encoding='utf-8'):
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"""
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Reads and parses the contents of this node as JSON (Python ≥ 2.6)::
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def build(bld):
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bld.path.find_node('abc.json').read_json()
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Note that this by default automatically decodes unicode strings on Python2, unlike what the Python JSON module does.
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:type convert: boolean
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:param convert: Prevents decoding of unicode strings on Python2
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:type encoding: string
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:param encoding: The encoding of the file to read. This default to UTF8 as per the JSON standard
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:rtype: object
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:return: Parsed file contents
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"""
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import json # Python 2.6 and up
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object_pairs_hook = None
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if convert and sys.hexversion < 0x3000000:
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try:
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_type = unicode
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except NameError:
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_type = str
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def convert(value):
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if isinstance(value, list):
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return [convert(element) for element in value]
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elif isinstance(value, _type):
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return str(value)
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else:
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return value
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def object_pairs(pairs):
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return dict((str(pair[0]), convert(pair[1])) for pair in pairs)
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object_pairs_hook = object_pairs
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return json.loads(self.read(encoding=encoding), object_pairs_hook=object_pairs_hook)
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def write_json(self, data, pretty=True):
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"""
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Writes a python object as JSON to disk (Python ≥ 2.6) as UTF-8 data (JSON standard)::
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def build(bld):
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bld.path.find_node('xyz.json').write_json(199)
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:type data: object
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:param data: The data to write to disk
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:type pretty: boolean
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:param pretty: Determines if the JSON will be nicely space separated
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"""
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import json # Python 2.6 and up
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indent = 2
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separators = (',', ': ')
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sort_keys = pretty
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newline = os.linesep
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if not pretty:
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indent = None
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separators = (',', ':')
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newline = ''
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output = json.dumps(data, indent=indent, separators=separators, sort_keys=sort_keys) + newline
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self.write(output, encoding='utf-8')
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def exists(self):
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"""
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Returns whether the Node is present on the filesystem
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:rtype: bool
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"""
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return os.path.exists(self.abspath())
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def isdir(self):
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"""
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Returns whether the Node represents a folder
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:rtype: bool
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"""
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return os.path.isdir(self.abspath())
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def chmod(self, val):
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"""
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Changes the file/dir permissions::
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def build(bld):
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bld.path.chmod(493) # 0755
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"""
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os.chmod(self.abspath(), val)
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def delete(self, evict=True):
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"""
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Removes the file/folder from the filesystem (equivalent to `rm -rf`), and remove this object from the Node tree.
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Do not use this object after calling this method.
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"""
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try:
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try:
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if os.path.isdir(self.abspath()):
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shutil.rmtree(self.abspath())
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else:
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os.remove(self.abspath())
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except OSError as e:
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if os.path.exists(self.abspath()):
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raise e
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finally:
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if evict:
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self.evict()
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def evict(self):
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"""
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Removes this node from the Node tree
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"""
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del self.parent.children[self.name]
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def suffix(self):
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"""
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Returns the file rightmost extension, for example `a.b.c.d → .d`
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:rtype: string
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"""
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k = max(0, self.name.rfind('.'))
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return self.name[k:]
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def height(self):
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"""
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Returns the depth in the folder hierarchy from the filesystem root or from all the file drives
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:returns: filesystem depth
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:rtype: integer
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"""
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d = self
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val = -1
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while d:
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d = d.parent
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val += 1
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return val
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def listdir(self):
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"""
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Lists the folder contents
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:returns: list of file/folder names ordered alphabetically
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:rtype: list of string
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"""
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lst = Utils.listdir(self.abspath())
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lst.sort()
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return lst
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def mkdir(self):
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"""
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Creates a folder represented by this node. Intermediate folders are created as needed.
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:raises: :py:class:`waflib.Errors.WafError` when the folder is missing
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"""
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if self.isdir():
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return
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try:
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self.parent.mkdir()
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except OSError:
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pass
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if self.name:
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try:
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os.makedirs(self.abspath())
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except OSError:
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pass
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if not self.isdir():
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raise Errors.WafError('Could not create the directory %r' % self)
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try:
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self.children
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except AttributeError:
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self.children = self.dict_class()
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def find_node(self, lst):
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"""
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Finds a node on the file system (files or folders), and creates the corresponding Node objects if it exists
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:param lst: relative path
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:type lst: string or list of string
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:returns: The corresponding Node object or None if no entry was found on the filesystem
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:rtype: :py:class:´waflib.Node.Node´
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"""
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if isinstance(lst, str):
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lst = [x for x in Utils.split_path(lst) if x and x != '.']
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cur = self
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for x in lst:
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if x == '..':
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cur = cur.parent or cur
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continue
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try:
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ch = cur.children
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except AttributeError:
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cur.children = self.dict_class()
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else:
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try:
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cur = ch[x]
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continue
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except KeyError:
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pass
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# optimistic: create the node first then look if it was correct to do so
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cur = self.__class__(x, cur)
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if not cur.exists():
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cur.evict()
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return None
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if not cur.exists():
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cur.evict()
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return None
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return cur
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def make_node(self, lst):
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"""
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Returns or creates a Node object corresponding to the input path without considering the filesystem.
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:param lst: relative path
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:type lst: string or list of string
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:rtype: :py:class:´waflib.Node.Node´
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"""
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if isinstance(lst, str):
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lst = [x for x in Utils.split_path(lst) if x and x != '.']
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cur = self
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for x in lst:
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if x == '..':
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cur = cur.parent or cur
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continue
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try:
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cur = cur.children[x]
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except AttributeError:
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cur.children = self.dict_class()
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except KeyError:
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pass
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else:
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continue
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cur = self.__class__(x, cur)
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return cur
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def search_node(self, lst):
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"""
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Returns a Node previously defined in the data structure. The filesystem is not considered.
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:param lst: relative path
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:type lst: string or list of string
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:rtype: :py:class:´waflib.Node.Node´ or None if there is no entry in the Node datastructure
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"""
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if isinstance(lst, str):
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lst = [x for x in Utils.split_path(lst) if x and x != '.']
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cur = self
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for x in lst:
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if x == '..':
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cur = cur.parent or cur
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else:
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try:
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cur = cur.children[x]
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except (AttributeError, KeyError):
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return None
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return cur
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def path_from(self, node):
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"""
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Path of this node seen from the other::
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def build(bld):
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n1 = bld.path.find_node('foo/bar/xyz.txt')
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n2 = bld.path.find_node('foo/stuff/')
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n1.path_from(n2) # '../bar/xyz.txt'
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:param node: path to use as a reference
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:type node: :py:class:`waflib.Node.Node`
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:returns: a relative path or an absolute one if that is better
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:rtype: string
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"""
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c1 = self
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c2 = node
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c1h = c1.height()
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c2h = c2.height()
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lst = []
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up = 0
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while c1h > c2h:
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lst.append(c1.name)
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c1 = c1.parent
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c1h -= 1
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while c2h > c1h:
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up += 1
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c2 = c2.parent
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c2h -= 1
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while not c1 is c2:
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lst.append(c1.name)
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up += 1
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c1 = c1.parent
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c2 = c2.parent
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if c1.parent:
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lst.extend(['..'] * up)
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lst.reverse()
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return os.sep.join(lst) or '.'
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else:
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return self.abspath()
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def abspath(self):
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"""
|
||
Returns the absolute path. A cache is kept in the context as ``cache_node_abspath``
|
||
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||
:rtype: string
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||
"""
|
||
try:
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||
return self.cache_abspath
|
||
except AttributeError:
|
||
pass
|
||
# think twice before touching this (performance + complexity + correctness)
|
||
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||
if not self.parent:
|
||
val = os.sep
|
||
elif not self.parent.name:
|
||
val = os.sep + self.name
|
||
else:
|
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val = self.parent.abspath() + os.sep + self.name
|
||
self.cache_abspath = val
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||
return val
|
||
|
||
if Utils.is_win32:
|
||
def abspath(self):
|
||
try:
|
||
return self.cache_abspath
|
||
except AttributeError:
|
||
pass
|
||
if not self.parent:
|
||
val = ''
|
||
elif not self.parent.name:
|
||
val = self.name + os.sep
|
||
else:
|
||
val = self.parent.abspath().rstrip(os.sep) + os.sep + self.name
|
||
self.cache_abspath = val
|
||
return val
|
||
|
||
def is_child_of(self, node):
|
||
"""
|
||
Returns whether the object belongs to a subtree of the input node::
|
||
|
||
def build(bld):
|
||
node = bld.path.find_node('wscript')
|
||
node.is_child_of(bld.path) # True
|
||
|
||
:param node: path to use as a reference
|
||
:type node: :py:class:`waflib.Node.Node`
|
||
:rtype: bool
|
||
"""
|
||
p = self
|
||
diff = self.height() - node.height()
|
||
while diff > 0:
|
||
diff -= 1
|
||
p = p.parent
|
||
return p is node
|
||
|
||
def ant_iter(self, accept=None, maxdepth=25, pats=[], dir=False, src=True, remove=True):
|
||
"""
|
||
Recursive method used by :py:meth:`waflib.Node.ant_glob`.
|
||
|
||
:param accept: function used for accepting/rejecting a node, returns the patterns that can be still accepted in recursion
|
||
:type accept: function
|
||
:param maxdepth: maximum depth in the filesystem (25)
|
||
:type maxdepth: int
|
||
:param pats: list of patterns to accept and list of patterns to exclude
|
||
:type pats: tuple
|
||
:param dir: return folders too (False by default)
|
||
:type dir: bool
|
||
:param src: return files (True by default)
|
||
:type src: bool
|
||
:param remove: remove files/folders that do not exist (True by default)
|
||
:type remove: bool
|
||
:returns: A generator object to iterate from
|
||
:rtype: iterator
|
||
"""
|
||
dircont = self.listdir()
|
||
dircont.sort()
|
||
|
||
try:
|
||
lst = set(self.children.keys())
|
||
except AttributeError:
|
||
self.children = self.dict_class()
|
||
else:
|
||
if remove:
|
||
for x in lst - set(dircont):
|
||
self.children[x].evict()
|
||
|
||
for name in dircont:
|
||
npats = accept(name, pats)
|
||
if npats and npats[0]:
|
||
accepted = [] in npats[0]
|
||
|
||
node = self.make_node([name])
|
||
|
||
isdir = node.isdir()
|
||
if accepted:
|
||
if isdir:
|
||
if dir:
|
||
yield node
|
||
else:
|
||
if src:
|
||
yield node
|
||
|
||
if isdir:
|
||
node.cache_isdir = True
|
||
if maxdepth:
|
||
for k in node.ant_iter(accept=accept, maxdepth=maxdepth - 1, pats=npats, dir=dir, src=src, remove=remove):
|
||
yield k
|
||
raise StopIteration
|
||
|
||
def ant_glob(self, *k, **kw):
|
||
"""
|
||
Finds files across folders:
|
||
|
||
* ``**/*`` find all files recursively
|
||
* ``**/*.class`` find all files ending by .class
|
||
* ``..`` find files having two dot characters
|
||
|
||
For example::
|
||
|
||
def configure(cfg):
|
||
cfg.path.ant_glob('**/*.cpp') # finds all .cpp files
|
||
cfg.root.ant_glob('etc/*.txt') # matching from the filesystem root can be slow
|
||
cfg.path.ant_glob('*.cpp', excl=['*.c'], src=True, dir=False)
|
||
|
||
For more information see http://ant.apache.org/manual/dirtasks.html
|
||
|
||
The nodes that correspond to files and folders that do not exist are garbage-collected.
|
||
To prevent this behaviour in particular when running over the build directory, pass ``remove=False``
|
||
|
||
:param incl: ant patterns or list of patterns to include
|
||
:type incl: string or list of strings
|
||
:param excl: ant patterns or list of patterns to exclude
|
||
:type excl: string or list of strings
|
||
:param dir: return folders too (False by default)
|
||
:type dir: bool
|
||
:param src: return files (True by default)
|
||
:type src: bool
|
||
:param remove: remove files/folders that do not exist (True by default)
|
||
:type remove: bool
|
||
:param maxdepth: maximum depth of recursion
|
||
:type maxdepth: int
|
||
:param ignorecase: ignore case while matching (False by default)
|
||
:type ignorecase: bool
|
||
:returns: The corresponding Nodes
|
||
:rtype: list of :py:class:`waflib.Node.Node` instances
|
||
"""
|
||
|
||
src = kw.get('src', True)
|
||
dir = kw.get('dir', False)
|
||
|
||
excl = kw.get('excl', exclude_regs)
|
||
incl = k and k[0] or kw.get('incl', '**')
|
||
reflags = kw.get('ignorecase', 0) and re.I
|
||
|
||
def to_pat(s):
|
||
lst = Utils.to_list(s)
|
||
ret = []
|
||
for x in lst:
|
||
x = x.replace('\\', '/').replace('//', '/')
|
||
if x.endswith('/'):
|
||
x += '**'
|
||
lst2 = x.split('/')
|
||
accu = []
|
||
for k in lst2:
|
||
if k == '**':
|
||
accu.append(k)
|
||
else:
|
||
k = k.replace('.', '[.]').replace('*','.*').replace('?', '.').replace('+', '\\+')
|
||
k = '^%s$' % k
|
||
try:
|
||
#print "pattern", k
|
||
accu.append(re.compile(k, flags=reflags))
|
||
except Exception as e:
|
||
raise Errors.WafError('Invalid pattern: %s' % k, e)
|
||
ret.append(accu)
|
||
return ret
|
||
|
||
def filtre(name, nn):
|
||
ret = []
|
||
for lst in nn:
|
||
if not lst:
|
||
pass
|
||
elif lst[0] == '**':
|
||
ret.append(lst)
|
||
if len(lst) > 1:
|
||
if lst[1].match(name):
|
||
ret.append(lst[2:])
|
||
else:
|
||
ret.append([])
|
||
elif lst[0].match(name):
|
||
ret.append(lst[1:])
|
||
return ret
|
||
|
||
def accept(name, pats):
|
||
nacc = filtre(name, pats[0])
|
||
nrej = filtre(name, pats[1])
|
||
if [] in nrej:
|
||
nacc = []
|
||
return [nacc, nrej]
|
||
|
||
ret = [x for x in self.ant_iter(accept=accept, pats=[to_pat(incl), to_pat(excl)], maxdepth=kw.get('maxdepth', 25), dir=dir, src=src, remove=kw.get('remove', True))]
|
||
if kw.get('flat', False):
|
||
return ' '.join([x.path_from(self) for x in ret])
|
||
|
||
return ret
|
||
|
||
# --------------------------------------------------------------------------------
|
||
# the following methods require the source/build folders (bld.srcnode/bld.bldnode)
|
||
# using a subclass is a possibility, but is that really necessary?
|
||
# --------------------------------------------------------------------------------
|
||
|
||
def is_src(self):
|
||
"""
|
||
Returns True if the node is below the source directory. Note that ``!is_src() ≠ is_bld()``
|
||
|
||
:rtype: bool
|
||
"""
|
||
cur = self
|
||
x = self.ctx.srcnode
|
||
y = self.ctx.bldnode
|
||
while cur.parent:
|
||
if cur is y:
|
||
return False
|
||
if cur is x:
|
||
return True
|
||
cur = cur.parent
|
||
return False
|
||
|
||
def is_bld(self):
|
||
"""
|
||
Returns True if the node is below the build directory. Note that ``!is_bld() ≠ is_src()``
|
||
|
||
:rtype: bool
|
||
"""
|
||
cur = self
|
||
y = self.ctx.bldnode
|
||
while cur.parent:
|
||
if cur is y:
|
||
return True
|
||
cur = cur.parent
|
||
return False
|
||
|
||
def get_src(self):
|
||
"""
|
||
Returns the corresponding Node object in the source directory (or self if not possible)
|
||
|
||
:rtype: :py:class:`waflib.Node.Node`
|
||
"""
|
||
cur = self
|
||
x = self.ctx.srcnode
|
||
y = self.ctx.bldnode
|
||
lst = []
|
||
while cur.parent:
|
||
if cur is y:
|
||
lst.reverse()
|
||
return x.make_node(lst)
|
||
if cur is x:
|
||
return self
|
||
lst.append(cur.name)
|
||
cur = cur.parent
|
||
return self
|
||
|
||
def get_bld(self):
|
||
"""
|
||
Return the corresponding Node object in the build directory (or self if not possible)
|
||
|
||
:rtype: :py:class:`waflib.Node.Node`
|
||
"""
|
||
cur = self
|
||
x = self.ctx.srcnode
|
||
y = self.ctx.bldnode
|
||
lst = []
|
||
while cur.parent:
|
||
if cur is y:
|
||
return self
|
||
if cur is x:
|
||
lst.reverse()
|
||
return self.ctx.bldnode.make_node(lst)
|
||
lst.append(cur.name)
|
||
cur = cur.parent
|
||
# the file is external to the current project, make a fake root in the current build directory
|
||
lst.reverse()
|
||
if lst and Utils.is_win32 and len(lst[0]) == 2 and lst[0].endswith(':'):
|
||
lst[0] = lst[0][0]
|
||
return self.ctx.bldnode.make_node(['__root__'] + lst)
|
||
|
||
def find_resource(self, lst):
|
||
"""
|
||
Use this method in the build phase to find source files corresponding to the relative path given.
|
||
|
||
First it looks up the Node data structure to find any declared Node object in the build directory.
|
||
If None is found, it then considers the filesystem in the source directory.
|
||
|
||
:param lst: relative path
|
||
:type lst: string or list of string
|
||
:returns: the corresponding Node object or None
|
||
:rtype: :py:class:`waflib.Node.Node`
|
||
"""
|
||
if isinstance(lst, str):
|
||
lst = [x for x in Utils.split_path(lst) if x and x != '.']
|
||
|
||
node = self.get_bld().search_node(lst)
|
||
if not node:
|
||
node = self.get_src().find_node(lst)
|
||
if node and node.isdir():
|
||
return None
|
||
return node
|
||
|
||
def find_or_declare(self, lst):
|
||
"""
|
||
Use this method in the build phase to declare output files.
|
||
|
||
If 'self' is in build directory, it first tries to return an existing node object.
|
||
If no Node is found, it tries to find one in the source directory.
|
||
If no Node is found, a new Node object is created in the build directory, and the
|
||
intermediate folders are added.
|
||
|
||
:param lst: relative path
|
||
:type lst: string or list of string
|
||
"""
|
||
if isinstance(lst, str):
|
||
lst = [x for x in Utils.split_path(lst) if x and x != '.']
|
||
|
||
node = self.get_bld().search_node(lst)
|
||
if node:
|
||
if not os.path.isfile(node.abspath()):
|
||
node.parent.mkdir()
|
||
return node
|
||
self = self.get_src()
|
||
node = self.find_node(lst)
|
||
if node:
|
||
return node
|
||
node = self.get_bld().make_node(lst)
|
||
node.parent.mkdir()
|
||
return node
|
||
|
||
def find_dir(self, lst):
|
||
"""
|
||
Searches for a folder on the filesystem (see :py:meth:`waflib.Node.Node.find_node`)
|
||
|
||
:param lst: relative path
|
||
:type lst: string or list of string
|
||
:returns: The corresponding Node object or None if there is no such folder
|
||
:rtype: :py:class:`waflib.Node.Node`
|
||
"""
|
||
if isinstance(lst, str):
|
||
lst = [x for x in Utils.split_path(lst) if x and x != '.']
|
||
|
||
node = self.find_node(lst)
|
||
if node and not node.isdir():
|
||
return None
|
||
return node
|
||
|
||
# helpers for building things
|
||
def change_ext(self, ext, ext_in=None):
|
||
"""
|
||
Declares a build node with a distinct extension; this is uses :py:meth:`waflib.Node.Node.find_or_declare`
|
||
|
||
:return: A build node of the same path, but with a different extension
|
||
:rtype: :py:class:`waflib.Node.Node`
|
||
"""
|
||
name = self.name
|
||
if ext_in is None:
|
||
k = name.rfind('.')
|
||
if k >= 0:
|
||
name = name[:k] + ext
|
||
else:
|
||
name = name + ext
|
||
else:
|
||
name = name[:- len(ext_in)] + ext
|
||
|
||
return self.parent.find_or_declare([name])
|
||
|
||
def bldpath(self):
|
||
"""
|
||
Returns the relative path seen from the build directory ``src/foo.cpp``
|
||
|
||
:rtype: string
|
||
"""
|
||
return self.path_from(self.ctx.bldnode)
|
||
|
||
def srcpath(self):
|
||
"""
|
||
Returns the relative path seen from the source directory ``../src/foo.cpp``
|
||
|
||
:rtype: string
|
||
"""
|
||
return self.path_from(self.ctx.srcnode)
|
||
|
||
def relpath(self):
|
||
"""
|
||
If a file in the build directory, returns :py:meth:`waflib.Node.Node.bldpath`,
|
||
else returns :py:meth:`waflib.Node.Node.srcpath`
|
||
|
||
:rtype: string
|
||
"""
|
||
cur = self
|
||
x = self.ctx.bldnode
|
||
while cur.parent:
|
||
if cur is x:
|
||
return self.bldpath()
|
||
cur = cur.parent
|
||
return self.srcpath()
|
||
|
||
def bld_dir(self):
|
||
"""
|
||
Equivalent to self.parent.bldpath()
|
||
|
||
:rtype: string
|
||
"""
|
||
return self.parent.bldpath()
|
||
|
||
def h_file(self):
|
||
"""
|
||
See :py:func:`waflib.Utils.h_file`
|
||
|
||
:return: a hash representing the file contents
|
||
:rtype: string or bytes
|
||
"""
|
||
return Utils.h_file(self.abspath())
|
||
|
||
def get_bld_sig(self):
|
||
"""
|
||
Returns a signature (see :py:meth:`waflib.Node.Node.h_file`) for the purpose
|
||
of build dependency calculation. This method uses a per-context cache.
|
||
|
||
:return: a hash representing the object contents
|
||
:rtype: string or bytes
|
||
"""
|
||
# previous behaviour can be set by returning self.ctx.node_sigs[self] when a build node
|
||
try:
|
||
cache = self.ctx.cache_sig
|
||
except AttributeError:
|
||
cache = self.ctx.cache_sig = {}
|
||
try:
|
||
ret = cache[self]
|
||
except KeyError:
|
||
p = self.abspath()
|
||
try:
|
||
ret = cache[self] = self.h_file()
|
||
except EnvironmentError:
|
||
if self.isdir():
|
||
# allow folders as build nodes, do not use the creation time
|
||
st = os.stat(p)
|
||
ret = cache[self] = Utils.h_list([p, st.st_ino, st.st_mode])
|
||
return ret
|
||
raise
|
||
return ret
|
||
|
||
# --------------------------------------------
|
||
# TODO waf 2.0, remove the sig and cache_sig attributes
|
||
def get_sig(self):
|
||
return self.h_file()
|
||
def set_sig(self, val):
|
||
# clear the cache, so that past implementation should still work
|
||
try:
|
||
del self.get_bld_sig.__cache__[(self,)]
|
||
except (AttributeError, KeyError):
|
||
pass
|
||
sig = property(get_sig, set_sig)
|
||
cache_sig = property(get_sig, set_sig)
|
||
|
||
pickle_lock = Utils.threading.Lock()
|
||
"""Lock mandatory for thread-safe node serialization"""
|
||
|
||
class Nod3(Node):
|
||
"""Mandatory subclass for thread-safe node serialization"""
|
||
pass # do not remove
|
||
|
||
|