xargs 没有从 aws cli 输出中拆分空格

Question

此命令 returns 所有由空格分隔的 AWS 区域：

aws ec2 describe-regions --query 'Regions[*].RegionName' --output text

eu-north-1  ap-south-1  eu-west-3   eu-west-2   eu-west-1   ap-northeast-2  ap-northeast-1  sa-east-1   ca-central-1    ap-southeast-1  ap-southeast-2  eu-central-1    us-east-1   us-east-2   us-west-1   us-west-2

我正在尝试将其通过管道传输到 xargs，但它会将其视为单个字符串：

aws ec2 describe-regions --query 'Regions[*].RegionName' --output text | gxargs -I {} aws cloudformation list-stacks --region {}

Invalid endpoint: https://cloudformation.eu-north-1 ap-south-1  eu-west-3   eu-west-2   eu-west-1   ap-northeast-2  ap-northeast-1  sa-east-1   ca-central-1    ap-southeast-1  ap-southeast-2  eu-central-1    us-east-1   us-east-2   us-west-1   us-west-2.amazonaws.com
gxargs: aws: exited with status 255; aborting

gxargs 就是 gnu xargs（我在 Mac）。

此外，尝试使用 jmespath 从具有特定分隔符的数组创建字符串（我可以将其与 xargs 一起使用）：

aws ec2 describe-regions --query 'Regions[*].join(",",@.RegionName)'
In function join(), invalid type for value: None, expected one of: ['string'], received: "null"

编辑：只是跟进，这就是我的结局。它坚持在找不到堆栈时抛出错误 - 其他 aws cli 命令可能相同

aws ec2 describe-regions --query 'Regions[*].RegionName' --output text | gxargs -n 1 sh -c 'aws cloudformation describe-stacks --stack-name findme --region [=13=] || true'

Answer 1

-I 的man xargs：

-I replace-str
Replace occurrences of replace-str in the initial-arguments with names read from standard input. Also, unquoted blanks do not terminate input items; instead the separator is the newline character. Implies -x and -L 1.

您可以改用xargs -n 1 aws cloudformation list-stacks --region

xargs 没有从 aws cli 输出中拆分空格

xargs not splitting on whitespace from aws cli output

bash

xargs

amazon-web-services

aws-cli

jmespath