jq是否可以在设置新值时使用已删除的值? [英] Is it possible with jq to use a deleted value in setting new ones?

问题描述

我正在使用bash进行json解析器 jq

I am using the bash to json parser jq

考虑以下命令:

jq '. * .transitive | del(.transitive) | del(.scope,.scopedName)' package.json > package.github.json$$

以及以下输入:

{
  "name": "navigation",
  "transitive": {
    "name": "navigation",
    "scope": "bs",
    "scopedName": "@bs/navigation"
  }
}

我正在尝试获得以下输出:

{
  "name": "@bs/navigation"
}

在删除.scopedName之前是否有办法使用它的值来设置.name?

Is there a way before doing the delete of .scopedName, to use it's value to set .name?

推荐答案

将输入转换为输出很简单:

Transforming your input to your output is as simple as:

jq '{"name": .transitive.scopedName}'

...当然，您可以重新排序以设置name 之前删除transitive:

...and of course you could just reorder things to set name before deleting transitive:

jq '.name=.transitive.scopedName | del(.transitive)'

也就是说，如果您真的要先使用del()，则可以将内容保存在变量中，以后再使用:

That said, if you really want to use del() first, you can save content in a variable and use it later:

jq '
  .transitive as $transitive |
  del(.transitive) |
  .name=$transitive.scopedName
'

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