forked from troessner/reek
-
Notifications
You must be signed in to change notification settings - Fork 0
/
code_parser.rb
217 lines (176 loc) · 4.36 KB
/
code_parser.rb
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
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
require 'rubygems'
require 'sexp'
require 'reek/block_context'
require 'reek/class_context'
require 'reek/module_context'
require 'reek/stop_context'
require 'reek/if_context'
require 'reek/method_context'
require 'reek/singleton_method_context'
require 'reek/yield_call_context'
class Sexp
def children
find_all { |item| Sexp === item }
end
def is_language_node?
first.class == Symbol
end
def has_type?(type)
is_language_node? and first == type
end
end
module Reek
class CodeParser
# Creates a new Ruby code checker. Any smells discovered
# will be stored in +report+.
def initialize(smells, ctx = StopContext.new)
@smells = smells
@element = ctx
end
def process(exp)
meth = "process_#{exp[0]}"
meth = :process_default unless self.respond_to?(meth)
self.send(meth, exp)
@element
end
def process_default(exp)
exp[0..-1].each { |sub| process(sub) if Array === sub }
end
def process_module(exp)
push(ModuleContext.create(@element, exp)) do
process_default(exp)
check_smells(:module)
end
end
def process_class(exp)
scope = ClassContext.create(@element, exp)
push(scope) do
process_default(exp) unless @element.is_struct?
check_smells(:class)
end
scope
end
def process_defn(exp)
handle_context(MethodContext, :defn, exp)
end
def process_defs(exp)
handle_context(SingletonMethodContext, :defs, exp)
end
def process_args(exp)
exp[1..-1].each {|sym| @element.record_parameter(sym) }
end
def process_attrset(exp)
@element.record_depends_on_self if /^@/ === exp[1].to_s
end
def process_lit(exp)
val = exp[1]
@element.record_depends_on_self if val == :self
end
def process_iter(exp)
process(exp[1])
handle_context(BlockContext, :iter, exp[2..-1])
end
def process_dasgn_curr(exp)
@element.record_parameter(exp[1])
process_default(exp)
end
def process_block(exp)
@element.count_statements(CodeParser.count_statements(exp))
process_default(exp)
end
def process_yield(exp)
handle_context(YieldCallContext, :yield, exp)
end
def process_call(exp)
@element.record_call_to(exp)
process_default(exp)
end
def process_cfunc(exp)
@element.record_depends_on_self
end
def process_attrasgn(exp)
process_call(exp)
end
def process_op_asgn1(exp)
process_call(exp)
end
def process_if(exp)
count_clause(exp[2])
count_clause(exp[3])
handle_context(IfContext, :if, exp)
@element.count_statements(-1)
end
def process_while(exp)
process_until(exp)
end
def process_until(exp)
count_clause(exp[2])
process_default(exp)
@element.count_statements(-1)
end
def process_for(exp)
count_clause(exp[3])
process_case(exp)
end
def process_rescue(exp)
count_clause(exp[1])
process_case(exp)
end
def process_resbody(exp)
process_when(exp)
end
def process_case(exp)
process_default(exp)
@element.count_statements(-1)
end
def process_when(exp)
count_clause(exp[2])
process_default(exp)
end
def process_ivar(exp)
process_iasgn(exp)
end
def process_lasgn(exp)
@element.record_local_variable(exp[1])
process_default(exp)
end
def process_iasgn(exp)
@element.record_instance_variable(exp[1])
@element.record_depends_on_self
process_default(exp)
end
def process_self(exp)
@element.record_depends_on_self
end
def count_clause(sexp)
if sexp and !sexp.has_type?(:block)
@element.count_statements(1)
end
end
def self.count_statements(exp)
stmts = exp[1..-1]
ignore = 0
ignore += 1 if stmts[1] == s(:nil)
stmts.length - ignore
end
private
def handle_context(klass, type, exp)
scope = klass.new(@element, exp)
push(scope) do
process_default(exp)
check_smells(type)
end
scope
end
def check_smells(type)
listeners = @smells[type]
listeners.each {|smell| smell.examine(@element) } if listeners
end
def push(context)
orig = @element
@element = context
yield
@element = orig
end
end
end