Do not copy pseudo files (device, socket, etc.) in dynamic analysis

Related to #17.

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## Development
 
 * Fix error `singleton can't be dumped (TypeError)` at the end of dynamic analysis ([#17](https://github.com/yujinakayama/transpec/issues/17))
+* Do not copy pseudo files (device, socket, etc.) in dynamic analysis ([#17](https://github.com/yujinakayama/transpec/issues/17))
 
 ## v1.2.1
 

lib/transpec/dynamic_analyzer.rb

@@ -5,6 +5,8 @@
 require 'transpec/file_finder'
 require 'transpec/project'
 require 'tmpdir'
+require 'find'
+require 'pathname'
 require 'fileutils'
 require 'shellwords'
 require 'English'
@@ -127,7 +129,7 @@ def in_copied_project
       @in_copied_project = true
 
       Dir.mktmpdir do |tmpdir|
-        FileUtils.cp_r(@project.path, tmpdir)
+        copy_recursively(@project.path, tmpdir)
         @copied_project_path = File.join(tmpdir, @project.basename)
         Dir.chdir(@copied_project_path) do
           yield
@@ -159,5 +161,39 @@ def run_rspec(paths)
         end
       end
     end
+
+    def copy_recursively(source_root, destination_root)
+      source_root = File.expand_path(source_root)
+      source_root_pathname = Pathname.new(source_root)
+
+      destination_root = File.expand_path(destination_root)
+      if File.directory?(destination_root)
+        destination_root = File.join(destination_root, File.basename(source_root))
+      end
+
+      Find.find(source_root) do |source_path|
+        relative_path = Pathname.new(source_path).relative_path_from(source_root_pathname).to_s
+        destination_path = File.join(destination_root, relative_path)
+
+        copy(source_path, destination_path)
+
+        if File.exist?(destination_path)
+          source_mode = File.lstat(source_path).mode
+          File.lchmod(source_mode, destination_path)
+        end
+      end
+    end
+
+    private
+
+    def copy(source, destination)
+      if File.symlink?(source)
+        File.symlink(File.readlink(source), destination)
+      elsif File.directory?(source)
+        FileUtils.mkdir_p(destination)
+      elsif File.file?(source)
+        FileUtils.copy_file(source, destination)
+      end
+    end
   end
 end

spec/transpec/dynamic_analyzer_spec.rb

@@ -176,5 +176,63 @@ module Transpec
         end
       end
     end
+
+    describe '#copy_recursively' do
+      it 'copies files recursively' do
+        [
+          'src/file1',
+          'src/file2',
+          'src/dir1/file',
+          'src/dir2/file'
+        ].each do |path|
+          create_file(path, '')
+        end
+
+        dynamic_analyzer.copy_recursively('src', 'dst')
+
+        [
+          'dst/file1',
+          'dst/file2',
+          'dst/dir1/file',
+          'dst/dir2/file'
+        ].each do |path|
+          File.exist?(path).should be_true
+        end
+      end
+
+      it 'copies only directories, files and symlinks' do
+        create_file('src/file', '')
+        File.symlink('file', 'src/symlink')
+        Dir.mkdir('src/dir')
+        system('mkfifo', 'src/fifo')
+
+        dynamic_analyzer.copy_recursively('src', 'dst')
+
+        File.file?('dst/file').should be_true
+        File.symlink?('dst/symlink').should be_true
+        File.directory?('dst/dir').should be_true
+        File.exist?('dst/fifo').should be_false
+      end
+
+      def permission(path)
+        format('%o', File.lstat(path).mode)[-4..-1]
+      end
+
+      it 'preserves permission' do
+        create_file('src/file', '')
+        File.lchmod(0755, 'src/file')
+
+        File.symlink('file', 'src/symlink')
+        File.lchmod(0777, 'src/symlink')
+
+        Dir.mkdir('src/dir')
+        File.lchmod(0600, 'src/dir')
+        dynamic_analyzer.copy_recursively('src', 'dst')
+
+        permission('dst/file').should == '0755'
+        permission('dst/symlink').should == '0777'
+        permission('dst/dir').should == '0600'
+      end
+    end
   end
 end