Python Cheetah - 指定模板的名称/值对

发布于 2024-09-16 23:02:15 字数 1131 浏览 7 评论 0原文

我正在尝试模板化我的 Apache httpd 配置以部署到不同的环境，并且我想使用 Python 语言 Cheetah 应用程序来执行此操作。然而，我在使用命令行 cheetah 程序时遇到了困难，我相信这是我对 Cheetah 的误解以及缺乏文档的结合。

我的目标是拥有一个 httpd.conf 模板文件并替换环境特定定义文件中的变量。

httpd.tmpl:

Listen $HTTP_PORT
...
#if $ENABLE_HTTPS == true
<Virtual Host *:$HTTPS_PORT>
    ...
</VirtualHost>
#end if

生产.env:

HTTP_PORT=34120
HTTPS_PORT=34121
ENABLE_HTTPS=true

填充此 Cheetah 模板所需的命令行是什么？我使用过：

cheetah f --oext conf --debug httpd

但显然 prod.env 没有被读取为输入文件。将 #include 添加到我的模板文件顶部：

#include "prod.env"

并且没有找到我的名字：

Cheetah.NameMapper.NotFound: cannot find 'APACHE_PORT'

无论如何，这都不是理想的情况，因为我希望能够在模板文件上指定名称/值映射文件每次调用 cheetah 的命令行。

谢谢！

编辑：我知道我可以编写一个 python 脚本来执行文件读取，然后使用 Cheetah API 进行替换。但是，我正在寻找一种使用命令行来填充我的模板的方法。

已解决

感谢 @pyfunc 提供的文档链接，我现在了解如何实现此目的。主要问题是在 cheetah 命令行上提供 --env ，将当前环境变量传递给 cheetah。然而，必须首先导出这些环境变量。

原文

I am trying to template-ize my Apache httpd configuration for deployment to different environments and I would like to use the Python language Cheetah application to do so. However, I am having difficulty with the command line cheetah program and I believe its a combination of my misunderstanding Cheetah along with a lack of documentation.

My goal is to have a single httpd.conf template file and substitute variables from an environment specific definition file.

httpd.tmpl:

Listen $HTTP_PORT
...
#if $ENABLE_HTTPS == true
<Virtual Host *:$HTTPS_PORT>
    ...
</VirtualHost>
#end if

production.env:

HTTP_PORT=34120
HTTPS_PORT=34121
ENABLE_HTTPS=true

What is the command line needed to fill this Cheetah template? I've used:

cheetah f --oext conf --debug httpd

But obviously prod.env is not read as an input file. Adding an #include to the top of my template file:

#include "prod.env"

And none of my names are found:

Cheetah.NameMapper.NotFound: cannot find 'APACHE_PORT'

This is not the ideal situation anyway, because I want the ability to specify the name/value mapping file on the command line for each invocation of cheetah.

Thanks!

EDIT: I am aware that I can write a python script to perform the file reading and then substitute using the Cheetah API. However, I'm looking for a way to use the command line to fill my template.

SOLVED

Thanks to the documentation link provided by @pyfunc I now understand how to accomplish this. The main issue is to supply --env on the cheetah command line which passes the current environment variables to cheetah. These environment variables must be exported first however.

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