summaryrefslogtreecommitdiffstats
path: root/Lib/lib2to3/fixes/fix_imports.py
blob: e48c4f0904dac86e7c3d41922fe7701ceea11b0b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
"""Fix incompatible imports and module references."""
# Authors: Collin Winter, Nick Edds

# Local imports
from .. import fixer_base
from ..fixer_util import Name, attr_chain

MAPPING = {'StringIO':  'io',
           'cStringIO': 'io',
           'cPickle': 'pickle',
           '__builtin__' : 'builtins',
           'copy_reg': 'copyreg',
           'Queue': 'queue',
           'SocketServer': 'socketserver',
           'ConfigParser': 'configparser',
           'repr': 'reprlib',
           'FileDialog': 'tkinter.filedialog',
           'tkFileDialog': 'tkinter.filedialog',
           'SimpleDialog': 'tkinter.simpledialog',
           'tkSimpleDialog': 'tkinter.simpledialog',
           'tkColorChooser': 'tkinter.colorchooser',
           'tkCommonDialog': 'tkinter.commondialog',
           'Dialog': 'tkinter.dialog',
           'Tkdnd': 'tkinter.dnd',
           'tkFont': 'tkinter.font',
           'tkMessageBox': 'tkinter.messagebox',
           'ScrolledText': 'tkinter.scrolledtext',
           'turtle': 'tkinter.turtle',
           'Tkconstants': 'tkinter.constants',
           'Tix': 'tkinter.tix',
           'Tkinter': 'tkinter',
           'markupbase': '_markupbase',
           '_winreg': 'winreg',
           'thread': '_thread',
           'dummy_thread': '_dummy_thread',
           # anydbm and whichdb are handled by fix_imports2
           'dbhash': 'dbm.bsd',
           'dumbdbm': 'dbm.dumb',
           'dbm': 'dbm.ndbm',
           'gdbm': 'dbm.gnu',
           'xmlrpclib': 'xmlrpc.client',
           'DocXMLRPCServer': 'xmlrpc.server',
           'SimpleXMLRPCServer': 'xmlrpc.server',
           'httplib': 'http.client',
           'Cookie': 'http.cookies',
           'cookielib': 'http.cookiejar',
           'BaseHTTPServer': 'http.server',
           'SimpleHTTPServer': 'http.server',
           'CGIHTTPServer': 'http.server',
           #'test.test_support': 'test.support',
           'commands': 'subprocess',
           'UserString' : 'collections',
           'UserList' : 'collections',
           'urlparse' : 'urllib.parse',
           'robotparser' : 'urllib.robotparser',
}


def alternates(members):
    return "(" + "|".join(map(repr, members)) + ")"


def build_pattern(mapping=MAPPING):
    mod_list = ' | '.join(["module_name='%s'" % key for key in mapping])
    bare_names = alternates(mapping.keys())

    yield """name_import=import_name< 'import' ((%s)
                          | dotted_as_names< any* (%s) any* >) >
          """ % (mod_list, mod_list)
    yield """import_from< 'from' (%s) 'import' ['(']
              ( any | import_as_name< any 'as' any > |
                import_as_names< any* >)  [')'] >
          """ % mod_list
    yield """import_name< 'import'
                          dotted_as_name< (%s) 'as' any > >
          """ % mod_list

    # Find usages of module members in code e.g. thread.foo(bar)
    yield "power< bare_with_attr=(%s) trailer<'.' any > any* >" % bare_names


class FixImports(fixer_base.BaseFix):

    order = "pre" # Pre-order tree traversal

    # This is overridden in fix_imports2.
    mapping = MAPPING

    def build_pattern(self):
        return "|".join(build_pattern(self.mapping))

    def compile_pattern(self):
        # We override this, so MAPPING can be pragmatically altered and the
        # changes will be reflected in PATTERN.
        self.PATTERN = self.build_pattern()
        super(FixImports, self).compile_pattern()

    # Don't match the node if it's within another match.
    def match(self, node):
        match = super(FixImports, self).match
        results = match(node)
        if results:
            # Module usage could be in the trailier of an attribute lookup, so
            # we might have nested matches when "bare_with_attr" is present.
            if "bare_with_attr" not in results and \
                    any([match(obj) for obj in attr_chain(node, "parent")]):
                return False
            return results
        return False

    def start_tree(self, tree, filename):
        super(FixImports, self).start_tree(tree, filename)
        self.replace = {}

    def transform(self, node, results):
        import_mod = results.get("module_name")
        if import_mod:
            new_name = self.mapping[(import_mod or mod_name).value]
            if "name_import" in results:
                # If it's not a "from x import x, y" or "import x as y" import,
                # marked its usage to be replaced.
                self.replace[import_mod.value] = new_name
            import_mod.replace(Name(new_name, prefix=import_mod.get_prefix()))
        else:
            # Replace usage of the module.
            bare_name = results["bare_with_attr"][0]
            new_name = self.replace.get(bare_name.value)
            if new_name:
                bare_name.replace(Name(new_name, prefix=bare_name.get_prefix()))