[英]xargs not splitting on whitespace from aws cli output
This commands returns all the AWS regions separated by whitespace:此命令返回由空格分隔的所有 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
I'm trying to pipe this to xargs but it's seeing it as a single string: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 is just gnu xargs (I'm on Mac). gxargs 只是 gnu xargs (我在 Mac 上)。
Also, tried this to use jmespath to create a string from an array with a specific delimiter (which I could use with xargs):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"
EDIT: just following up, this is what I wound up with.编辑:只是跟进,这就是我的结局。 It insists on throwing an error when it doesn't find a stack- probably the same for other aws cli commands它坚持在找不到堆栈时抛出错误 - 对于其他 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 $0 || true'
Here's man xargs
for -I
:这是-I
的man xargs
:
-I replace-str
Replace occurrences of replace-str in the initial-arguments with names read from standard input.用从标准输入读取的名称替换初始参数中出现的 replace-str。 Also, unquoted blanks do not terminate input items ;此外,未加引号的空格不会终止输入项; instead the separator is the newline character.相反,分隔符是换行符。 Implies -x and -L 1.意味着 -x 和 -L 1。
You can use xargs -n 1 aws cloudformation list-stacks --region
instead您可以使用xargs -n 1 aws cloudformation list-stacks --region
代替
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