[FIX] building documentation with P3

* fix P3 incompatibilities in doc/_extensions
* vendor pyjsdoc, strip out everything we're not using and make what's
  left P3-compatible (upstream is not P3 compliant)
* drop undeclared dependency on attrs as it turns out not to be much
  used

4 files changed, 21 insertions, 18 deletions

diff --git a/doc/_extensions/autojsdoc/__main__.py b/doc/_extensions/autojsdoc/__main__.py
index 20ab65c2c37..2ac5f3a0cb3 100644
--- a/doc/_extensions/autojsdoc/__main__.py
+++ b/doc/_extensions/autojsdoc/__main__.py
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*-
+from __future__ import print_function
 import cgitb
 import fnmatch
 import io
@@ -6,13 +7,12 @@ import logging
 
 import click
 
-import pyjsdoc
 import pyjsparser
 import sys
 
 from .parser.parser import ModuleMatcher
 from .parser.visitor import Visitor, SKIP
-from . import jsdoc
+from .parser import jsdoc
 
 class Printer(Visitor):
     def __init__(self, level=0):
@@ -20,7 +20,7 @@ class Printer(Visitor):
         self.level = level
 
     def _print(self, text):
-        print '    ' * self.level, text
+        print('    ' * self.level, text)
 
     def enter_generic(self, node):
         self._print(node['type'])
diff --git a/doc/_extensions/autojsdoc/parser/jsdoc.py b/doc/_extensions/autojsdoc/parser/jsdoc.py
index 00406df42c1..a34a2aa9b83 100644
--- a/doc/_extensions/autojsdoc/parser/jsdoc.py
+++ b/doc/_extensions/autojsdoc/parser/jsdoc.py
@@ -174,7 +174,7 @@ class NSDoc(CommentDoc):
                     for p in self.get_as_list('property')
                 )
             ]
-        return self.members.items() or self['_members'] or []
+        return list(self.members.items()) or self['_members'] or []
 
     def has_property(self, name):
         return self.get_property(name) is not None
diff --git a/doc/_extensions/autojsdoc/parser/parser.py b/doc/_extensions/autojsdoc/parser/parser.py
index d91b9f22596..358d20c8e9b 100644
--- a/doc/_extensions/autojsdoc/parser/parser.py
+++ b/doc/_extensions/autojsdoc/parser/parser.py
@@ -2,7 +2,6 @@
 import collections
 
 import pyjsdoc
-from attr import attrs, Factory, attr, astuple
 
 from . import jsdoc
 from . import utils
@@ -97,21 +96,25 @@ def m2r(me, scope):
         utils._value(me['property'], strict=True)
     )
 
-@attrs(slots=True)
+NOTHING = object()
 class Declaration(object):
-    id = attr(default=None)
-    comments = attr(default=Factory(list))
-@attrs(slots=True)
+    __slots__ = ['id', 'comments']
+    def __init__(self, id=None, comments=NOTHING):
+        self.id = id
+        self.comments = [] if comments is NOTHING else comments
+
 class ModuleContent(object):
-    dependencies = attr(default=Factory(set))
-    post = attr(default=Factory(list))
+    __slots__ = ['dependencies', 'post']
+    def __init__(self, dependencies=NOTHING, post=NOTHING):
+        self.dependencies = set() if dependencies is NOTHING else dependencies
+        self.post = [] if post is NOTHING else post
     def __iter__(self):
         yield self.dependencies
         yield self.post
 
-@attrs # needs dict as it's replacing a ModuleProxy
 class Nothing(object):
-    name = attr()
+    def __init__(self, name):
+        self.name = name
     def __bool__(self):
         return False
     __nonzero__ = __bool__
@@ -389,7 +392,7 @@ class ValueExtractor(Visitor):
         return SKIP
 
     def enter_FunctionExpression(self, node):
-        name, comments = astuple(self.declaration)
+        name, comments = (self.declaration.id, self.declaration.comments)
         self.result = jsdoc.parse_comments(comments, jsdoc.FunctionDoc)
         self.result.parsed['name'] = node['id'] and node['id']['name']
         self._update_result_meta()
@@ -437,7 +440,7 @@ class ValueExtractor(Visitor):
             },
         }):  # creates a new class, but may not actually return it
             obj = node['callee']['object']
-            _, comments = astuple(self.declaration)
+            comments = self.declaration.comments
             self.result = cls = jsdoc.parse_comments(comments, jsdoc.ClassDoc)
             cls.parsed['extends'] = self.parent.refify(obj)
             self._update_result_meta()
diff --git a/doc/_extensions/autojsdoc/parser/utils.py b/doc/_extensions/autojsdoc/parser/utils.py
index b8b1a97e7aa..213327f6c0e 100644
--- a/doc/_extensions/autojsdoc/parser/utils.py
+++ b/doc/_extensions/autojsdoc/parser/utils.py
@@ -104,7 +104,7 @@ def resolve(obj, store):
     if obj is None:
         return None
 
-    if isinstance(obj, (unicode, bool, int, float)):
+    if isinstance(obj, (type(u''), bool, int, float)):
         return obj
 
     if isinstance(obj, ModuleProxy):
@@ -139,11 +139,11 @@ class Namespace(Resolvable):
         r = super(Namespace, self).resolve(store)
         self.attrs = {
             k: resolve(v, store)
-            for k, v in self.attrs.iteritems()
+            for k, v in self.attrs.items()
         }
         return r
     def __getitem__(self, key):
-        assert isinstance(key, unicode), "%r is not a namespace key" % key
+        assert isinstance(key, type(u'')), "%r is not a namespace key" % key
         try:
             return self.attrs[key]
         except KeyError: