Dir.py.svn-base
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上传日期:2018-11-18
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- #
- # Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 The SCons Foundation
- #
- # Permission is hereby granted, free of charge, to any person obtaining
- # a copy of this software and associated documentation files (the
- # "Software"), to deal in the Software without restriction, including
- # without limitation the rights to use, copy, modify, merge, publish,
- # distribute, sublicense, and/or sell copies of the Software, and to
- # permit persons to whom the Software is furnished to do so, subject to
- # the following conditions:
- #
- # The above copyright notice and this permission notice shall be included
- # in all copies or substantial portions of the Software.
- #
- # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
- # KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
- # WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
- # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- #
- __revision__ = "src/engine/SCons/Scanner/Dir.py 3057 2008/06/09 22:21:00 knight"
- import SCons.Node.FS
- import SCons.Scanner
- def only_dirs(nodes):
- is_Dir = lambda n: isinstance(n.disambiguate(), SCons.Node.FS.Dir)
- return filter(is_Dir, nodes)
- def DirScanner(**kw):
- """Return a prototype Scanner instance for scanning
- directories for on-disk files"""
- kw['node_factory'] = SCons.Node.FS.Entry
- kw['recursive'] = only_dirs
- return apply(SCons.Scanner.Base, (scan_on_disk, "DirScanner"), kw)
- def DirEntryScanner(**kw):
- """Return a prototype Scanner instance for "scanning"
- directory Nodes for their in-memory entries"""
- kw['node_factory'] = SCons.Node.FS.Entry
- kw['recursive'] = None
- return apply(SCons.Scanner.Base, (scan_in_memory, "DirEntryScanner"), kw)
- skip_entry = {}
- skip_entry_list = [
- '.',
- '..',
- '.sconsign',
- # Used by the native dblite.py module.
- '.sconsign.dblite',
- # Used by dbm and dumbdbm.
- '.sconsign.dir',
- # Used by dbm.
- '.sconsign.pag',
- # Used by dumbdbm.
- '.sconsign.dat',
- '.sconsign.bak',
- # Used by some dbm emulations using Berkeley DB.
- '.sconsign.db',
- ]
- for skip in skip_entry_list:
- skip_entry[skip] = 1
- skip_entry[SCons.Node.FS._my_normcase(skip)] = 1
- do_not_scan = lambda k: not skip_entry.has_key(k)
- def scan_on_disk(node, env, path=()):
- """
- Scans a directory for on-disk files and directories therein.
- Looking up the entries will add these to the in-memory Node tree
- representation of the file system, so all we have to do is just
- that and then call the in-memory scanning function.
- """
- try:
- flist = node.fs.listdir(node.abspath)
- except (IOError, OSError):
- return []
- e = node.Entry
- for f in filter(do_not_scan, flist):
- # Add ./ to the beginning of the file name so if it begins with a
- # '#' we don't look it up relative to the top-level directory.
- e('./' + f)
- return scan_in_memory(node, env, path)
- def scan_in_memory(node, env, path=()):
- """
- "Scans" a Node.FS.Dir for its in-memory entries.
- """
- try:
- entries = node.entries
- except AttributeError:
- # It's not a Node.FS.Dir (or doesn't look enough like one for
- # our purposes), which can happen if a target list containing
- # mixed Node types (Dirs and Files, for example) has a Dir as
- # the first entry.
- return []
- entry_list = filter(do_not_scan, entries.keys())
- entry_list.sort()
- return map(lambda n, e=entries: e[n], entry_list)