“减少输入"中的可选元素包括:条款 [英] Optional element in "reduce inputs" clause

问题描述

我正在研究我从先前的问题中得到的出色的答案.

I am working on this excellent answer that I got from an earlier question.

这是我目前拥有的:

function data {
cat <<EOF
Security:ClientId=123456
Security:ClientSecret=abcdefg
AppSettings:Environment=Dev
AnotherCustomSetting=SomethingElse
EOF
}

data | jq -nR '

def parse: capture("(?:(?<group>[^:=]*):)?(?<property>[^=]*)=(?<value>.*)");

reduce inputs as $line ({};
   ($line | parse) as $envVar
   | if .[$envVar.group] != null then .[$envVar.group][$envVar.property] = ($envVar.value) else .[$envVar.property] = ($envVar.value) end)
'

我的最终目标是拥有一个像这样的Json文件:

My end goal is to have a Json file like this:

{
  "Security": {
    "ClientId": "123456",
    "ClientSecret": "abcdefg"
  },
  "AppSettings": {
    "Environment": "Dev"
  },
  "AnotherCustomSetting": "SomethingElse"      
}

在上一个问题中，我没有指出我需要在根级别使用属性(在这种情况下，为 AnotherCustomSetting ).

In my previous question I did not indicate that I would need properties at the root level (AnotherCustomSetting in this case).

为了尝试使根级别属性起作用，我将RegEx修改为具有一个可选组，但是原始答案的 reduce输入并不认为 group 为空(并以null错误失败).因此，我尝试在减少输入部分中放置 if 语句.不幸的是，它失败并显示以下错误:

To try to get root level properties working, I modified the RegEx to have an optional group, but the original answer's reduce inputs did not anticipate the group being null (and failed with a null error when it was). So I attempted to put an if statement in the reduce inputs section. Unfortunately it is failing with the following error:

jq:错误(在4处):无法为空索引对象

jq: error (at :4): Cannot index object with null

是否有可能像我尝试的那样在减少输入部分中执行 if if else else ?如果是这样，怎么做?

Is it possible to do an if then else in a reduce inputs section like I am attempting? If so, how is it done?

推荐答案

这应该做到:

def parse: capture("(?<x>[^:=]*)(:(?<y>[^:=]*))?=(?<value>.*)");

reduce inputs as $line ({};
   ($line | parse) as $p
   | if $p.y then .[$p.x][$p.y] = $p.value
     else .[$p.x] = $p.value end )

当然可以进一步加强...

Of course this could be further robustified...

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