rake aborted! Ruby on rails, Wordpress Plugin

I had to enter the world of Ruby the force to modify a plugin of Wordpress, I'm new to Ruby, I'm only followed by tips and I'm not able to solve the problem. Following the steps to do this I encounter this error after entering the following command "rake setup" in the console.

C:\MAMP\htdocs\wordpress\wp-content\plugins\wp-social-metrics-tracker-1.6.1>rake setup

Do you want to develop on WordPress multisite right now? (y/n)y
WP-CLI 0.20.1
Using system WP-CLI command 'wp'
======================  CREATING WP DEV DB  ======================
$(wp foi inesperado neste momento.
======================  DOWNLOADING AND CONFIGURING WORDPRESS CORE AND TEST FILES  ======================
'bash' não é reconhecido como um comando interno
ou externo, um programa operável ou um arquivo em lotes.
======================  CREATING WP-CONFIG  ======================
rake aborted!
Errno::ENOENT: No such file or directory - rm -f tmp/wp-config.php
tools/tasks/setup.rb:71:in '''
tools/tasks/setup.rb:71:in 'block (2 levels) in <top (required)>'
tools/tasks/setup.rb:118:in 'block in <top (required)>'
Tasks: TOP => setup:wp_config
(See full trace by running task with --trace)

I look at the last line and I enter in the console "rake setup --trace" and this is presented: C: \ MAMP \ htdocs \ wordpress \ wp-content \ plugins \ wp-social-metrics-tracker-1.6.1> rake setup --trace

** Invoke setup (first_time)
** Execute setup

Do you want to develop on WordPress multisite right now? (y/n)y
** Invoke setup:dev_db (first_time)
** Invoke requires_wpcli (first_time)
** Execute requires_wpcli
WP-CLI 0.20.1
Using system WP-CLI command 'wp'
** Execute setup:dev_db
======================  CREATING WP DEV DB  ======================
$(wp foi inesperado neste momento.
** Invoke setup:files (first_time)
** Execute setup:files
======================  DOWNLOADING AND CONFIGURING WORDPRESS CORE AND TEST FILES  ======================
'bash' não é reconhecido como um comando interno
ou externo, um programa operável ou um arquivo em lotes.
** Invoke setup:wp_config (first_time)
** Invoke requires_wpcli
** Execute setup:wp_config
======================  CREATING WP-CONFIG  ======================
rake aborted!
Errno::ENOENT: No such file or directory - rm -f tmp/wp-config.php
tools/tasks/setup.rb:71:in '''
tools/tasks/setup.rb:71:in 'block (2 levels) in <top (required)>'
C:/Ruby22-x64/lib/ruby/2.2.0/rake/task.rb:240:in 'call'
C:/Ruby22-x64/lib/ruby/2.2.0/rake/task.rb:240:in 'block in execute'
C:/Ruby22-x64/lib/ruby/2.2.0/rake/task.rb:235:in 'each'
C:/Ruby22-x64/lib/ruby/2.2.0/rake/task.rb:235:in 'execute'
C:/Ruby22-x64/lib/ruby/2.2.0/rake/task.rb:179:in 'block in invoke_with_call_chain'
C:/Ruby22-x64/lib/ruby/2.2.0/monitor.rb:211:in 'mon_synchronize'
C:/Ruby22-x64/lib/ruby/2.2.0/rake/task.rb:172:in 'invoke_with_call_chain'
C:/Ruby22-x64/lib/ruby/2.2.0/rake/task.rb:165:in 'invoke'
tools/tasks/setup.rb:118:in 'block in <top (required)>'
C:/Ruby22-x64/lib/ruby/2.2.0/rake/task.rb:240:in 'call'
C:/Ruby22-x64/lib/ruby/2.2.0/rake/task.rb:240:in 'block in execute'
C:/Ruby22-x64/lib/ruby/2.2.0/rake/task.rb:235:in 'each'
C:/Ruby22-x64/lib/ruby/2.2.0/rake/task.rb:235:in 'execute'
C:/Ruby22-x64/lib/ruby/2.2.0/rake/task.rb:179:in 'block in invoke_with_call_chain'
C:/Ruby22-x64/lib/ruby/2.2.0/monitor.rb:211:in 'mon_synchronize'
C:/Ruby22-x64/lib/ruby/2.2.0/rake/task.rb:172:in 'invoke_with_call_chain'
C:/Ruby22-x64/lib/ruby/2.2.0/rake/task.rb:165:in 'invoke'
C:/Ruby22-x64/lib/ruby/2.2.0/rake/application.rb:150:in 'invoke_task'
C:/Ruby22-x64/lib/ruby/2.2.0/rake/application.rb:106:in 'block (2 levels) in top_level'
C:/Ruby22-x64/lib/ruby/2.2.0/rake/application.rb:106:in 'each'
C:/Ruby22-x64/lib/ruby/2.2.0/rake/application.rb:106:in 'block in top_level'
C:/Ruby22-x64/lib/ruby/2.2.0/rake/application.rb:115:in 'run_with_threads'
C:/Ruby22-x64/lib/ruby/2.2.0/rake/application.rb:100:in 'top_level'
C:/Ruby22-x64/lib/ruby/2.2.0/rake/application.rb:78:in 'block in run'
C:/Ruby22-x64/lib/ruby/2.2.0/rake/application.rb:176:in 'standard_exception_handling'
C:/Ruby22-x64/lib/ruby/2.2.0/rake/application.rb:75:in 'run'
C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-10.4.2/bin/rake:33:in '<top (required)>'
C:/Ruby22-x64/bin/rake:23:in 'load'
C:/Ruby22-x64/bin/rake:23:in '<main>'
Tasks: TOP => setup:wp_config

In both cases the rake is aborted according to the image. Could someone help?