使用正则表达式和jq替换json的部分值

Question

我有一个像下面这样的json：

[
  {
    "name": "architecture-design-detailed",
    "rootPath": "/media/ismail/architecture-design-detailed/_Working/_NotesFiltered/_software/architecture-design-detailed",
    "paths": [],
    "group": "",
    "enabled": true
  },
  {
    "name": "architecture-design-detailed-engineering",
    "rootPath": "/media/ismail/architecture-design-detailed/_Working/_NotesFiltered/_software/architecture-design-detailed-engineering",
    "paths": [],
    "group": "",
    "enabled": true
  }
]

如果名字是

architecture-design-detailed

,

• 将名称更改为

  new_name_here

• 用 new_name_here 替换 rootPath 的最后一部分（这是架构设计详细的，在最后一个 / 之后）。

所以预期输出是：

[
  {
    "name": "new_name_here",
    "rootPath": "/media/ismail/architecture-design-detailed/_Working/_NotesFiltered/_software/new_name_here",
    "paths": [],
    "group": "",
    "enabled": true
  },
  {
    "name": "architecture-design-detailed-engineering",
    "rootPath": "/media/ismail/architecture-design-detailed/_Working/_NotesFiltered/_software/architecture-design-detailed-engineering",
    "paths": [],
    "group": "",
    "enabled": true
  }
]

到目前为止我想到的是：

jq 'map(if .name == "architecture-design-detailed" then .name = "new_name_here" else . end)'

但不明白如何替换 rootPath 的最后一部分。我认为我们必须使用

sub

或

gsub

。但不明白如何。

Answer 1

您可以使用

split("/")

将

rootPath

转换为数组，然后将最后一个索引 (

.[-1]

) 设置为

new_name

，然后

join("/")

将它们重新组合在一起。

map(select(.name == "architecture-design-detailed") 
    |= ( 
        .name = "new_name",
        .rootPath = (.rootPath | split("/") | .[-1] = "new_name" | join("/"))
    ) 
)

[
  {
    "name": "new_name",
    "rootPath": "/media/ismail/architecture-design-detailed/_Working/_NotesFiltered/_software/new_name",
    "paths": [],
    "group": "",
    "enabled": true
  },
  {
    "name": "architecture-design-detailed-engineering",
    "rootPath": "/media/ismail/architecture-design-detailed/_Working/_NotesFiltered/_software/architecture-design-detailed-engineering",
    "paths": [],
    "group": "",
    "enabled": true
  }
]

Answer 2

为了用jq实现你的目标，当名称匹配“architecture-design-detailed”时，你确实需要使用sub函数来替换rootPath的最后一部分。除了更改名称之外，您的 jq 过滤器还需要扩展以有条件地修改 rootPath。

map(
  if .name == "architecture-design-detailed" then
    .name = "new_name_here" |
    .rootPath |= sub("/architecture-design-detailed$"; "/new_name_here")
  else
    .
  end
)

输出：

[
  {
    "name": "new_name_here",
    "rootPath": "/media/ismail/architecture-design-detailed/_Working/_NotesFiltered/_software/new_name_here",
    "paths": [],
    "group": "",
    "enabled": true
  },
  {
    "name": "architecture-design-detailed-engineering",
    "rootPath": "/media/ismail/architecture-design-detailed/_Working/_NotesFiltered/_software/architecture-design-detailed-engineering",
    "paths": [],
    "group": "",
    "enabled": true
  }

]