仅对选定的宝石进行捆绑部署 [英] Bundle deployment only for selected gems

问题描述

我只想为系统未提供的一组宝石运行 bundle --deployment 。我试过使用 - with = group ，但它开始为 Gemfile

中的所有宝石执行操作。

解决方案Bundler的 - 带有选项与您期望的有点不同。首先查看 安装包 - 没有和 - 选项：

- 无=< list>

在安装过程中跳过引用gem到
的空格分隔列表。如果给出的组在
中给予--with的组列表中，它将从
列表中删除。这是一个记住的选项。

- with =< list>

- 引用宝石进行安装的组的列表。如果给出可选组，则安装它。如果一个组是
，因为在给出的--without记住的组列表中，
将从该列表中删除。这是一个记住的选项。

重要的是要注意 - with 是 not 只是的倒数 - 没有（尽管 - 带组取消取消出一个以前记住的 - 没有组，反之亦然），它支持完全不同的功能（一个的组， code>可选=> true 参数。

重要的是， - with 实现不会不包括来自默认群组或未由指定的任何其他群组 - > 。

因此，您有两种选择将您的安装限制为一组宝石：

1. 使用的白名单 - with通过将所有组标记为可选组（使用：optional => true 参数）并传递您希望安装的组，将至 - ，将所有其他可选组排除在外。 使用的黑名单 - 将所有不希望安装的群组传递给 - 不带。



不幸的是，这两个选项都无法防止安装默认组中的宝石（没有明确指定给组的宝石），所以您必须将您想要排除的所有宝石放置在某个组中。 / p>



该foll由于Gemfile的例子应该有助于澄清：



  gemrack＃总是安装;不可能排除
 
 group：group，：optional => true do 
 gemthin＃默认情况下未安装;使用--with = group 
 end 
 group：another_group，：optional => true do 
 gemwirble＃默认不安装;使用--with = another_group 
结束
安装 -  group：third_group do 
 gemactivesupport，2.3.5＃默认安装;排除使用--without = third_group 
结束
  




I would like to run bundle --deployment only for one group of gems that are not provided by the system. I've tried using --with=group but it started doing for all gems in the Gemfile

解决方案

Bundler's --with option works a bit different than what you're expecting. Let's first look at the bundle install man page for --without and --with options:

--without=<list>

A space-separated list of groups referencing gems to skip during installation. If a group is given that is in the remembered list of groups given to --with, it is removed from that list. This is a remembered option.

--with=<list>

A space-separated list of groups referencing gems to install. If an optional group is given it is installed. If a group is given that is in the remembered list of groups given to --without, it is removed from that list. This is a remembered option.

It is important to note that --with is not just the inverse of --without (although a --with group does cancel out a previously-remembered --without group and vice versa), it supports an entirely different feature (one implemented more recently, around mid-2015), the (backwards-compatible) concept of an "optional group", which only applies to groups explicitly marked with the optional => true parameter.

Importantly, the --with implementation does not exclude gems from either the default group or any other group not specified by --without.

So you have two options for restricting your installation to just a single group of gems:

1. Whitelist using --with by marking all groups as "optional groups" (using :optional => true parameter) and passing the group(s) you wish to install to --with, leaving all other optional groups excluded.
2. Blacklist using --without by passing all groups you do not wish to install to --without.

Unfortunately, neither option is able to prevent gems in the "default group" (gems not assigned to a group explicitly) from being installed, so you must place all gems you ever want to potentially exclude in some group.

The following Gemfile example should help clarify:

gem "rack" # Always installed; impossible to exclude

group :group, :optional => true do
  gem "thin" # Not installed by default; install using --with=group
end
group :another_group, :optional => true do
  gem "wirble" # Not installed by default; install using --with=another_group
end
group :third_group do
  gem "activesupport", "2.3.5" # Installed by default; exclude using --without=third_group
end

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