capistrano-template：#<SSHKit::Backend::Printer 的未定义方法“模板”

Question

为了使用带有 capistrano 的 erb 模板（无轨道），我按照 https://github.com/faber-lotto/capistrano-template 中给出的说明进行操作，但在运行 [bundle exec] cap staging define_usermacros -n --trace capistrano 时告诉我 SSHKit::Backend::Printer 不知道 template 方法：

** Invoke staging (first_time)  
** Execute staging
** Invoke load:defaults (first_time)
** Execute load:defaults
** Invoke define_usermacros (first_time)
** Execute define_usermacros
cap aborted!
SSHKit::Runner::ExecuteError: Exception while executing as    deploy@10.33.66.12: undefined method `template' for #<SSHKit::Backend::Printer:0x007ff383bd4d80>
/usr/local/var/rbenv/versions/2.2.5/lib/ruby/gems/2.2.0/gems/sshkit-1.13.1/lib/sshkit/runners/parallel.rb:15:in `rescue in block (2 levels) in execute'
/usr/local/var/rbenv/versions/2.2.5/lib/ruby/gems/2.2.0/gems/sshkit-1.13.1/lib/sshkit/runners/parallel.rb:11:in `block (2 levels) in execute'
NoMethodError: undefined method `template' for #<SSHKit::Backend::Printer:0x007ff383bd4d80>
config/deploy.rb:42:in `block (2 levels) in <top (required)>'
/usr/local/var/rbenv/versions/2.2.5/lib/ruby/gems/2.2.0/gems/sshkit-1.13.1/lib/sshkit/backends/abstract.rb:29:in `instance_exec'
/usr/local/var/rbenv/versions/2.2.5/lib/ruby/gems/2.2.0/gems/sshkit-1.13.1/lib/sshkit/backends/abstract.rb:29:in `run'
/usr/local/var/rbenv/versions/2.2.5/lib/ruby/gems/2.2.0/gems/sshkit-1.13.1/lib/sshkit/runners/parallel.rb:12:in `block (2 levels) in execute'
Tasks: TOP => define_usermacros

我尝试在捆绑包中升级和降级 capistrano、airbrush、sshkit，但无济于事，事情仍然失败。

目前 cap doctor 告诉我我正在使用以下版本：

环境

Ruby     ruby 2.2.5p319 (2016-04-26 revision 54774) [x86_64-darwin15]
Rubygems 2.6.10
Bundler  1.14.3
Command  /usr/local/var/rbenv/versions/2.2.5/bin/cap staging doctor

宝石

capistrano          3.7.2  (update available)
airbrussh           1.2.0
rake                12.0.0
sshkit              1.13.1
net-ssh             4.1.0
capistrano-template 0.0.8

这里是capistrano的东西：

宝石文件：

source "https://rubygems.org"

group :development do
  gem "capistrano", "~> 3.7.0"
  gem "capistrano-template"
end

Capfile：

require "capistrano/setup"
require "capistrano/deploy"
require "capistrano/scm/git"
install_plugin Capistrano::SCM::Git
require 'capistrano/capistrano_plugin_template'

配置/部署.rb：

[...]
desc 'Upload user macros as rendered erb-template'
task :define_usermacros do
  on roles :all do
    template 'resource.cfg', "#{release_path}/resource_file",
         0o640,
         locals: {
           'user1' => 'blah'
         }
 end
end

...config/deploy/templates/shared/resource.cfg.erb中当然有erb模板。

欢迎提供有关解决方案或如何调试问题的任何提示！

Answer 1

http://www.rubydoc.info/github/capistrano/sshkit/SSHKit/Backend/Printer 用于空运行（即使用 -n），因此在没有 -n 的情况下运行时作业可以正常工作。

可以通过添加来修复空运行

SSHKit::Backend::Printer.send(:include, Capistrano::Template::Helpers::DSL)

之后

require 'capistrano/capistrano_plugin_template'

在Capfile。