将 JSON 解析为 jq 以从 AWS CLI 获取列表

Question

我想获得一个任务定义列表，我可以通过 AWS CLI 创建一个列表。这是命令的部分列表；

aws ecs list-task-definitions --region eu-west-1

{
    "taskDefinitionArns": [
        "arn:aws:ecs:eu-west-1:543573289192:task-definition/audience-view-dev-api:4", 
        "arn:aws:ecs:eu-west-1:543573289192:task-definition/audience-view-dev-groups:4", 
        "arn:aws:ecs:eu-west-1:543573289192:task-definition/audience-view-dev-groups:5", 
        "arn:aws:ecs:eu-west-1:543573289192:task-definition/audience-view-dev-mock-api:1", 
        "arn:aws:ecs:eu-west-1:543573289192:task-definition/audience-view-dev-mock-responder:1"
    ]
}

从这里我只想展示；

audience-view-dev-api
audience-view-dev-groups
audience-view-dev-groups
audience-view-dev-mock-api
audience-view-dev-mock-responder

我相信如果我将它发送给jq，那么我可以得到我想要的东西吗？我正在尝试各种组合； aws ecs list-task-definitions --region eu-west-1 | jq -r '.taskDefinitionArns[].<something_here>'无济于事

Answer 1

试试这个：

$ aws ecs list-task-definitions --region eu-west-1 \
  | jq -Mr '.taskDefinitionArns[] | split(":")[5] | split("/")[1]'

扩展：

  .taskDefinitionArns[]     # for each taskDefinitionArns
| split(":")[5]             # take entry [5] after splitting by :
| split("/")[1]             # take entry [1] after splitting by /

Answer 2

带有jq match功能：

aws ecs list-task-definitions --region eu-west-1 \
| jq -r '.taskDefinitionArns[] | match(".*/([^:]+):[0-9]+$").captures[0].string'

• ".*/([^:]+):[0-9]+$" - 正则表达式模式匹配/ 和最后一个: 字符之间的序列

---

输出：

audience-view-dev-api
audience-view-dev-groups
audience-view-dev-groups
audience-view-dev-mock-api
audience-view-dev-mock-responder

https://stedolan.github.io/jq/manual/v1.5/#match(val),match(regex;flags)

Answer 3

获取唯一值：

aws ecs list-task-definitions | jq -r '.taskDefinitionArns[] | match(".*/([^:]+):[0-9]+$").captures[0].string' | sort | uniq