YAML 预处理器/宏处理器 [英] YAML preprocessor / macro processor

问题描述

是否有一种简单的方法可以将预处理器/宏处理器与 YAML 文件一起使用?(即，我正在考虑与 C 预处理器类似的东西)?

Is there a simple way to use a preproccesor / macro-processor with YAML files? (I.e. I'm thinking of something along the lines of the C preprocessor)?

我们有很多描述各种数据结构的纯文本文件.它们目前采用我们自己的内部格式，并使用内部解析器读取.我想切换到 YAML 文件以利用各种预先存在的库进行读写.

We have a lot of flat text-files that describes various data structures. They're currently in our own in-house format, and are read with an in-house parser. I'd like to switch to YAML files to make use of the various pre-existing libraries for reading and writing.

然而，我们的文件是分层的，因为我们将主文件包含"到子文件中，并使用变量替换生成新的数据结构.

However our files are hierarchical, in that we "include" master files into sub files, and using variable substitution generate new data structures.

作为一个玩具示例，我想要这样的东西:

As a toy example I'd want something like:

country_master.yaml

name: $COUNTRY$
file: C:\data\$COUNTRY$

UK_country.yaml

#define $COUNTRY$ UK
#include <country_master.yaml>

USA_country.yaml

#define $COUNTRY$ USA
#include <country_master.yaml>

然后在预处理之后我们会得到类似的东西:

Then after preprocessing we'd get something like:

name: USA
file: C:\data\USA

C 预处理器不适用于 YAML 注释中使用的 # 字符.此外，理想情况下，我们希望有由预处理器扩展的循环，因此在上面的示例中，我们将创建 UK 和 USA 以及一个循环(我不相信您可以使用 cpp).

The C-preprocessor won't work with the # character used in YAML comments. Also, ideally we'd like to have loops which are expanded by the preprocessor, so in the above example we'd create UK and USA together with a loop (and I don't believe you can loop with cpp).

有什么想法吗?

推荐答案

# Yamp - YAML Macro-Processor
# https://github.com/birchb1024/yamp

# in master.yaml
defmacro:
  name: country
  args: [$COUNTRY$]
  value:
    name: $COUNTRY$
    file: C:\data\{{$COUNTRY$}}
---
# in some file
- include: [master.yaml]

# Call with wherever needed:
{ country: USA }

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