Package SCons :: Package Scanner :: Module Dir
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Source Code for Module SCons.Scanner.Dir

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  2  # Copyright (c) 2001 - 2014 The SCons Foundation 
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 22   
 23  __revision__ = "src/engine/SCons/Scanner/Dir.py  2014/07/05 09:42:21 garyo" 
 24   
 25  import SCons.Node.FS 
 26  import SCons.Scanner 
 27   
28 -def only_dirs(nodes):
29 is_Dir = lambda n: isinstance(n.disambiguate(), SCons.Node.FS.Dir) 30 return list(filter(is_Dir, nodes))
31
32 -def DirScanner(**kw):
33 """Return a prototype Scanner instance for scanning 34 directories for on-disk files""" 35 kw['node_factory'] = SCons.Node.FS.Entry 36 kw['recursive'] = only_dirs 37 return SCons.Scanner.Base(scan_on_disk, "DirScanner", **kw)
38
39 -def DirEntryScanner(**kw):
40 """Return a prototype Scanner instance for "scanning" 41 directory Nodes for their in-memory entries""" 42 kw['node_factory'] = SCons.Node.FS.Entry 43 kw['recursive'] = None 44 return SCons.Scanner.Base(scan_in_memory, "DirEntryScanner", **kw)
45 46 skip_entry = {} 47 48 skip_entry_list = [ 49 '.', 50 '..', 51 '.sconsign', 52 # Used by the native dblite.py module. 53 '.sconsign.dblite', 54 # Used by dbm and dumbdbm. 55 '.sconsign.dir', 56 # Used by dbm. 57 '.sconsign.pag', 58 # Used by dumbdbm. 59 '.sconsign.dat', 60 '.sconsign.bak', 61 # Used by some dbm emulations using Berkeley DB. 62 '.sconsign.db', 63 ] 64 65 for skip in skip_entry_list: 66 skip_entry[skip] = 1 67 skip_entry[SCons.Node.FS._my_normcase(skip)] = 1 68 69 do_not_scan = lambda k: k not in skip_entry 70
71 -def scan_on_disk(node, env, path=()):
72 """ 73 Scans a directory for on-disk files and directories therein. 74 75 Looking up the entries will add these to the in-memory Node tree 76 representation of the file system, so all we have to do is just 77 that and then call the in-memory scanning function. 78 """ 79 try: 80 flist = node.fs.listdir(node.abspath) 81 except (IOError, OSError): 82 return [] 83 e = node.Entry 84 for f in filter(do_not_scan, flist): 85 # Add ./ to the beginning of the file name so if it begins with a 86 # '#' we don't look it up relative to the top-level directory. 87 e('./' + f) 88 return scan_in_memory(node, env, path)
89
90 -def scan_in_memory(node, env, path=()):
91 """ 92 "Scans" a Node.FS.Dir for its in-memory entries. 93 """ 94 try: 95 entries = node.entries 96 except AttributeError: 97 # It's not a Node.FS.Dir (or doesn't look enough like one for 98 # our purposes), which can happen if a target list containing 99 # mixed Node types (Dirs and Files, for example) has a Dir as 100 # the first entry. 101 return [] 102 entry_list = sorted(filter(do_not_scan, list(entries.keys()))) 103 return [entries[n] for n in entry_list]
104 105 # Local Variables: 106 # tab-width:4 107 # indent-tabs-mode:nil 108 # End: 109 # vim: set expandtab tabstop=4 shiftwidth=4: 110