AWS Lambdaに設定されているコードをダウンロード

It looks like your Lambda function "GreatFunction" is unable to be edited inline, so you need to re-upload any changes. This may be because your file is too large or your zip file contains more than one file to edit. However, you can still invoke your function right now.

とか表示されていて、マネジメントコンソール上でLambda関数を表示・編集できない時用。

$ aws --profile profile lambda get-function --function-name GreatFunction
CODE    https://awslambda-ap-ne-1-tasks.s3-ap-northeast-1.amazonaws.com/snapshots/99999/hogehoge    S3
CONFIGURATION   foo 99999   hugahuga    arn:aws:lambda:ap-northeast-1:99999:function:GreatFunction  GreatFunction   GreatFunction.handler   2016-05-10T06:28:32.253+0000    128 arn:aws:iam::99999:role/me  nodejs4.3   300 $LATEST

このURL https://awslambda-ap-ne-1-tasks.s3-ap-northeast-1.amazonaws.com/snapshots/99999/hogehoge からコード一式を落とせる。