json - 使用重定向运算符通过 jq 更新文件内容

Question

我的 JSON 输入文件如下:

{
"Name":"SA",
"Password":"yyyyy",
"Mappings" : {
"RegionMap" : {
   "us-east-1"      : { "AMI" : "xxxxxx" },
   "us-east-2"      : { "AMI" : "" },
   "us-west-1"      : { "AMI" : "" },
   "us-west-2"      : { "AMI" : "" },
   "ca-central-1"   : { "AMI" : "" },
   "eu-central-1"   : { "AMI" : "" },
   "eu-west-1"      : { "AMI" : "" },
   "eu-west-2"      : { "AMI" : "" },
   "ap-south-1"     : { "AMI" : "" },
   "ap-southeast-1" : { "AMI" : "" },
   "ap-southeast-2" : { "AMI" : "" },
   "ap-northeast-1" : { "AMI" : "" },
   "ap-northeast-2" : { "AMI" : "" },
   "sa-east-1"      : { "AMI" : "" }       
   }
 }
}

我的任务是更新给定 json 文件中 us-east-1 的 AMI 键的值，并将更新的文件创建为新文件。我正在使用jq带有重定向运算符的插件。它有+运算符，可用于覆盖对象中的内容。

我的预期输出是

{
"Name":"SA",
"Password":"yyyyy",
"Mappings" : {
"RegionMap" : {
   "us-east-1"      : { "AMI" : "abcd" },
   "us-east-2"      : { "AMI" : "" },
   "us-west-1"      : { "AMI" : "" },
   "us-west-2"      : { "AMI" : "" },
   "ca-central-1"   : { "AMI" : "" },
   "eu-central-1"   : { "AMI" : "" },
   "eu-west-1"      : { "AMI" : "" },
   "eu-west-2"      : { "AMI" : "" },
   "ap-south-1"     : { "AMI" : "" },
   "ap-southeast-1" : { "AMI" : "" },
   "ap-southeast-2" : { "AMI" : "" },
   "ap-northeast-1" : { "AMI" : "" },
   "ap-northeast-2" : { "AMI" : "" },
   "sa-east-1"      : { "AMI" : "" }       
   }
 }
}

我当前的命令未提供预期的输出，其输出如下:

jq '.Mappings.RegionMap + { "us-east-1":{"AMI":"abcd"}}' 
<OldfileName> > <Newfilename>

有人可以帮助我使用重定向运算符实现预期输出吗？

我正在 cygwin 环境和我的 jq 上运行该命令版本是 1.5 。

编辑

在密码 key 后添加了逗号

Answer 1

导致输入 json 无效的第一个问题是这一行(第三行):

...
"Password":"yyyyy"  <----
...

后面应该跟,。

修复该问题后，您可以轻松更新所需的属性值:

jq '.Mappings.RegionMap["us-east-1"].AMI = "abcd"' oldfile > newfile

---

newfile 内容:

{
  "Name": "SA",
  "Password": "yyyyy",
  "Mappings": {
    "RegionMap": {
      "us-east-1": {
        "AMI": "abcd"
      },
      "us-east-2": {
        "AMI": ""
      },
      "us-west-1": {
        "AMI": ""
      },
      "us-west-2": {
        "AMI": ""
      },
      "ca-central-1": {
        "AMI": ""
      },
      "eu-central-1": {
        "AMI": ""
      },
      "eu-west-1": {
        "AMI": ""
      },
      "eu-west-2": {
        "AMI": ""
      },
      "ap-south-1": {
        "AMI": ""
      },
      "ap-southeast-1": {
        "AMI": ""
      },
      "ap-southeast-2": {
        "AMI": ""
      },
      "ap-northeast-1": {
        "AMI": ""
      },
      "ap-northeast-2": {
        "AMI": ""
      },
      "sa-east-1": {
        "AMI": ""
      }
    }
  }
}