如何使用 aws cli 获取最新版本的 s3 object？

Question

Using the AWS CLI, how do I output a most recent VersionId string of an S3 object?

Answer 1

简化@rynop 的命令：

aws s3api list-object-versions --bucket us-east-1--aws-blueprint.mydomain.com --prefix my/object/key.ext --query 'Versions[?IsLatest].[VersionId]' --output text

Answer 2

There is another option to get the latest S3 object versionId.

To get it you have to simply set tag to that object with aws s3api put-object-tagging command. The output of that operation is only latest object versionId. By default it is returned as JSON, but with --output text option you will get it as only returned string.

Sample:

 $ VERSION_ID=$(aws s3api put-object-tagging --bucket bucket-name --key code.zip --tagging 'TagSet=[{Key=Lambda,Value=golang}]' --output text)
 $ echo $VERSION_ID
 6ubT3rNptpcZNGxEA6Cj2kAastuCyNL1

I believe it's best way to achieve it. The risk with listObjectVersions is that you might have more than pagination limit and then you will have to call it again from "NextToken" value. But with put-object-tagging it is reliable solution fir this usecase. Plus you get some more details stored on your object.

In my project I keep there details about the team responsible for the lambda, the code runtime for the ZIP and project repository name. So one someone spot that ZIP in the bucket it is easy to get such details.

Answer 3

aws s3api list-object-versions --bucket aws-blueprint.mybucket.com --prefix nested-stacks/apig/single-lambda-proxy-with-CORS.yaml | jq -r '.Versions[] | select(.IsLatest == true) | .VersionId'

输出看起来像： o65j.nFiJ00D25lNPyzsbJ7rWktOoKmS

Answer 4

I believe an even simpler version of @JohnRotenstein's answer is:

aws s3api head-object --bucket us-east-1--aws-blueprint.mydomain.com --prefix my/object/key.ext --query 'VersionId' --output text

It's not documented, but a HEAD request on an object appears to return the metadata of the latest version.