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+#
+# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 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 4577 2009/12/27 19:43:56 scons"
+
+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)
+
+# Local Variables:
+# tab-width:4
+# indent-tabs-mode:nil
+# End:
+# vim: set expandtab tabstop=4 shiftwidth=4: