Rails5からさくらのVPSへcapistranoを使ったデプロイができません。

Question

###前提・実現したいこと
Rails5からさくらのVPSへcapistranoを使ってデプロイをしたいです。

###発生している問題・エラーメッセージ

bundle exec cap staging deployコマンドを実行

(Backtrace restricted to imported tasks)
cap aborted!
Don't know how to build task 'deploy:new_release_path' (see --tasks)
/home/ubuntu/workspace/Capfile:2:in `<top (required)>'
(See full trace by running task with --trace)

Capfile:2に問題があるということで記述の順番が間違っているのかな？
と、思い修正しました。

修正前
【Capfile】

require "capistrano/setup"
require "capistrano/deploy"
require "capistrano/scm/git"
install_plugin Capistrano::SCM::Git★
Dir.glob("lib/capistrano/tasks/*.rake").each { |r| import r }★

修正後
【Capfile】

install_plugin Capistrano::SCM::Git★
Dir.glob("lib/capistrano/tasks/*.rake").each { |r| import r }★
require "capistrano/setup"
require "capistrano/deploy"
require "capistrano/scm/git"

bundle exec cap staging deployコマンドを実行

(Backtrace restricted to imported tasks)
cap aborted!
NameError: uninitialized constant Capistrano::SCM
/home/ubuntu/workspace/Capfile:1:in `<top (required)>'
(See full trace by running task with --trace)

未定義？のエラーが発生しました。
ここから、上記コードの順番を入れ替えて何通りか試してみましたが解決できません((+_+))

###該当のソースコード

【Capfile】

require "capistrano/setup"
require "capistrano/deploy"
require "capistrano/scm/git"
install_plugin Capistrano::SCM::Git
Dir.glob("lib/capistrano/tasks/*.rake").each { |r| import r }

require 'capistrano/rbenv'
require 'capistrano/rails'
require 'capistrano3/unicorn'
set :linked_files, %w{config/secrets.yml}

【deploy.rb】

lock '3.7.1'

set :application, 'sample'
set :repo_url, '[e-mail]:noppefoxwolf/sample-server.git'
set :deploy_to, '/home/deploy/staging'
set :pty, true
set :scm, :git
set :rbenv_ruby, '2.3.1'
set :rbenv_type, :system

after 'deploy:publishing', 'deploy:restart'
namespace :deploy do
  desc 'Restart application'
  task :restart do
    invoke 'unicorn:restart'
  end
end

【Gemfile】

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug'
  gem 'sqlite3'
  gem "capistrano"
  gem 'capistrano-rails'
  gem "capistrano-rbenv"
  gem 'capistrano-bundler'
  gem 'capistrano3-unicorn'
end

group :development do
  # Access an IRB console on exception pages or by using <%= console %> in views
  gem 'web-console', '~> 2.0'
  gem 'pg', '0.17.1'
  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
  gem 'spring'
  gem 'rails_12factor', '0.0.2'
end

group :production, :staging do
  gem 'unicorn'
end

###補足情報(言語/FW/ツール等のバージョンなど)
ほぼこちらの記事通り進めました

teratail内でもあまりdeployの部分の質問がなかったことも含め質問させていただきました。

よろしくお願いします。

Answer 1

①Capfileの記述の順番を変更
②deploy.rb内のset :scm, :gitを削除

で、解決できました。

【Capfile】

# Load DSL and set up stages
require "capistrano/setup"

# Include default deployment tasks
require "capistrano/deploy"★deployを上から二番目に★

# Load the SCM plugin appropriate to your project:
#
# require "capistrano/scm/hg"
# install_plugin Capistrano::SCM::Hg
# or
# require "capistrano/scm/svn"
# install_plugin Capistrano::SCM::Svn
# or
require "capistrano/scm/git"
install_plugin Capistrano::SCM::Git

require "capistrano/setup"
require "capistrano/deploy"

require 'capistrano/rbenv'
require 'capistrano/rails'
require 'capistrano3/unicorn'
set :linked_files, %w{config/secrets.yml}
# Load custom tasks from `lib/capistrano/tasks` if you have any defined
Dir.glob("lib/capistrano/tasks/*.rake").each { |r| import r }

# Include tasks from other gems included in your Gemfile
#
# For documentation on these, see for example:
#
#   https://github.com/capistrano/rvm
#   https://github.com/capistrano/rbenv
#   https://github.com/capistrano/chruby
#   https://github.com/capistrano/bundler
#   https://github.com/capistrano/rails
#   https://github.com/capistrano/passenger
#
# require "capistrano/rvm"
# require "capistrano/rbenv"
# require "capistrano/chruby"
# require "capistrano/bundler"
# require "capistrano/rails/assets"
# require "capistrano/rails/migrations"
# require "capistrano/passenger"

# Load custom tasks from `lib/capistrano/tasks` if you have any defined
Dir.glob("lib/capistrano/tasks/*.rake").each { |r| import r }

【deploy.rb】

lock '3.7.1'

set :application, 'third_app'
set :repo_url, 'zzzzzzzzzzzzzzzzzzzzzzzzzzz'
set :deploy_to, '/home/deploy/staging'
set :pty, true
set :rbenv_ruby, '2.3.1'
set :scm, :git★削除★
set :rbenv_type, :system
set :ssh_options, :port => "xxxxxxxxxxx"

ありがとうございました。