Class: Brakeman::FindCall

Inherits:
BasicProcessor
  • Object
show all
Defined in:
lib/brakeman/processors/lib/find_call.rb

Overview

Finds method calls matching the given target(s). #-- This should be deprecated --# #-- Do not use for new code --#

Targets/methods can be:

  • nil: matches anything, including nothing
  • Empty array: matches nothing
  • Symbol: matches single target/method exactly
  • Array of symbols: matches against any of the symbols
  • Regular expression: matches the expression
  • Array of regular expressions: matches any of the expressions

If a target is also the name of a class, methods called on instances of that class will also be matched, in a very limited way. (Any methods called on Klass.new, basically. More useful when used in conjunction with AliasProcessor.)

Examples:

#To find any uses of this class: FindCall.new :FindCall, nil

#Find system calls without a target FindCall.new [], [:system, :exec, :syscall]

#Find all calls to length(), no matter the target FindCall.new nil, :length

#Find all calls to sub, sub!, gsub, or gsub! FindCall.new nil, /^g?sub!?$/

Instance Method Summary collapse

Constructor Details

#initialize(targets, methods, tracker) ⇒ FindCall

Returns a new instance of FindCall.



36
37
38
39
40
41
42
43
 
# File 'lib/brakeman/processors/lib/find_call.rb', line 36

def initialize targets, methods, tracker
  super tracker
  @calls = []
  @find_targets = targets
  @find_methods = methods
  @current_class = nil
  @current_method = nil
end

Instance Method Details

#matches ⇒ Object

Returns a list of results.

A result looks like:

s(:result, :ClassName, :method_name, s(:call, ...))



50
51
52
 
# File 'lib/brakeman/processors/lib/find_call.rb', line 50

def matches
  @calls
end

#process_attrasgn(exp) ⇒ Object

Process an assignment like a call



84
85
86
 
# File 'lib/brakeman/processors/lib/find_call.rb', line 84

def process_attrasgn exp
  process_call exp
end

#process_call(exp) ⇒ Object

Look for matching calls and add them to results



70
71
72
73
74
75
76
77
78
79
80
81
 
# File 'lib/brakeman/processors/lib/find_call.rb', line 70

def process_call exp
  target = get_target exp.target
  method = exp.method

  process_call_args exp

  if match(@find_targets, target) and match(@find_methods, method)
    @calls << Sexp.new(:result, @current_module, @current_class, @current_method, exp).line(exp.line)
  end
  
  exp
end

#process_defn(exp) ⇒ Object Also known as: process_defs

Process body of method



63
64
65
 
# File 'lib/brakeman/processors/lib/find_call.rb', line 63

def process_defn exp
  process_all exp.body
end

#process_source(exp) ⇒ Object

Process the given source. Provide either class and method being searched or the template. These names are used when reporting results.

Use FindCall#matches to retrieve results.



58
59
60
 
# File 'lib/brakeman/processors/lib/find_call.rb', line 58

def process_source exp
  process exp
end