如何冻结当地无法满足的要求？ [英] How to freeze requirements that can't be satisfied locally?

问题描述

我正在编写一个Python应用程序来部署在Heroku上。根据 Heroku的指南，我需要在Pip 要求中列出软件包要求。 txt 文件。该指南指示我在本地安装软件包，然后运行 pip freeze> requirements.txt 来编写冻结的需求文件。

然而，我想用在其中的一个包部署在Heroku上不能在本地安装。它与我的操作系统不兼容。

那么如何编写 requirements.txt 包括适合Heroku的这个包？

我能想到的唯一方法就是手工编写它 - 但这会很乏味，因为所讨论的包有很多依赖于它自己的即可。此外，这也破坏了包管理器的功能。

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在将Ruby应用程序部署到Heroku时，Bundler使这一切变得简单。在我的Gemfile中，我写了

  gempg，：group => ：制作
 gemsqlite3，：group => ：development 
  

命令 bundle install 然后写入冻结版本列表 Gemfile.lock （类似于 requirements.txt ）。它不会安装组下列出的软件包，但它仍冻结了一个一致的版本化软件包列表。

示例： Gemfile 和 Gemfile.lock

解决方案

<这是不可能的。将问题报告给点子 https://github.com/pypa/pip/issues/747

I'm writing a Python app to deploy on Heroku. Per Heroku's guide, I need to list package requirements in a Pip requirements.txt file. The guide instructs me to install the packages locally, then run pip freeze > requirements.txt to write the frozen requirements file.

However, one of the packages I want to use in deployment on Heroku can't be installed locally. It's incompatible with my operating system.

So how do I write a requirements.txt including this package suitable for Heroku?

The only way I can think of is to write it by hand - but this would be tedious, because the package in question has many dependencies of its own. Besides, this defeats the point of the package manager.

---

When deploying Ruby apps to Heroku, Bundler makes this easy. In my Gemfile I write

gem "pg", :group => :production
gem "sqlite3", :group => :development

The command bundle install then writes a frozen version list Gemfile.lock (analogous to requirements.txt). It doesn't install the packages listed under the 'production' group, but it still freezes a consistent list of versioned packages.

Example: Gemfile and Gemfile.lock

解决方案

It's not possible. Issue reported to pip https://github.com/pypa/pip/issues/747

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