Class: Imp::UnusedClass

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/objcthin.rb

Instance Method Summary collapse

Instance Method Details

#check_file_type(path) ⇒ Object 



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# File 'lib/objcthin.rb', line 187

def check_file_type(path)
  pathname = Pathname.new(path)
  unless pathname.exist?
    raise "#{path} not exit!"
  end

  cmd = "/usr/bin/file -b #{path}"
  output = `#{cmd}`

  unless output.include?('Mach-O')
    raise 'input file not mach-o file type'
  end
  #puts Rainbow('will begin process...').green
  pathname
end

#find_unused_class(path, prefix) ⇒ Object 



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# File 'lib/objcthin.rb', line 181

def find_unused_class(path, prefix)
  check_file_type(path)
  result = split_segment_and_find(path, prefix)
  puts result.values
end

#split_segment_and_find(path, prefix) ⇒ Object 



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# File 'lib/objcthin.rb', line 203

def split_segment_and_find(path, prefix)

  arch_command = "lipo -info #{path}"
  arch_output = `#{arch_command}`

  arch = 'arm64'
  if arch_output.include? 'arm64'
    arch = 'arm64'
  elsif arch_output.include? 'x86_64'
    arch = 'x86_64'
  elsif arch_output.include? 'armv7'
    arch = 'armv7'
  end

  command = "/usr/bin/otool -arch #{arch}  -V -o #{path}"
  output = `#{command}`

  class_list_identifier = 'Contents of (__DATA,__objc_classlist) section'
  class_refs_identifier = 'Contents of (__DATA,__objc_classrefs) section'

  unless output.include? class_list_identifier
    raise Rainbow('only support iphone target, please use iphone build...').red
  end

  patten = /Contents of \(.*\) section/

  name_patten_string = '.*'
  unless prefix.empty?
    name_patten_string = "#{prefix}.*"
  end

  vmaddress_to_class_name_patten = /^(\d*\w*)\s(0x\d*\w*)\s_OBJC_CLASS_\$_(#{name_patten_string})/

  class_list = []
  class_refs = []
  used_vmaddress_to_class_name_hash = {}

  can_add_to_list = false
  can_add_to_refs = false

  output.each_line do |line|
    if patten.match?(line)
      if line.include? class_list_identifier
        can_add_to_list = true
        next
      elsif line.include? class_refs_identifier
        can_add_to_list = false
        can_add_to_refs = true
      else
        break
      end
    end

    if can_add_to_list
      class_list << line
    end

    if can_add_to_refs && line
      vmaddress_to_class_name_patten.match(line) do |m|
        unless used_vmaddress_to_class_name_hash[m[2]]
          used_vmaddress_to_class_name_hash[m[2]] = m[3]
        end
      end
    end
  end

  # remove cocoapods class
  podsd_dummy = 'PodsDummy'

  vmaddress_to_class_name_hash = {}
  class_list.each do |line|
    next if line.include? podsd_dummy
    vmaddress_to_class_name_patten.match(line) do |m|
      vmaddress_to_class_name_hash[m[2]] = m[3]
    end
  end

  result = vmaddress_to_class_name_hash
  vmaddress_to_class_name_hash.each do |key, value|
    if used_vmaddress_to_class_name_hash.keys.include?(key)
      result.delete(key)
    end
  end

  result
end