I just want to get back a list of function names. Ideally I want to get all functions (just their name) starting with "some-prefix*". Can I do this with the cli?
Really want this as a cli command if possible (I want to avoid python or another sdk). I see there is a --cli-input-json arg, can I use that for filtering?
You can do that. Use the --query option. The CLI would look like this:
aws lambda list-functions --region us-east-1 --query 'Functions[].FunctionName' --output text
To get the list of functions whose name begin with some-prefix:
aws lambda list-functions --region us-east-1 --query 'Functions[?starts_with(FunctionName, `some-prefix`) == `true`].FunctionName' --output text
To get the complete JSON, the CLI would be:
aws lambda list-functions --region us-east-1
Details about the query parameter can be found here.
aws lambda list-functions --region us-east-1 --query 'Functions[?starts_with(FunctionName, myfuncs) == true].FunctionName' --output text adds some whitespace between strings it returns. Can I choose the separator?
for loop so that we get the details line-by-line. If you print more than 1 item (in this case other than FunctionName, the CLI will return all the details for 1 function in 1 line.
aws lambda list-functions --region us-east-1 --query 'Functions[?starts_with(FunctionName, 'some-prefix-') == true].FunctionName' | jq '.[]' -raws lambda list-functions --region us-east-1 --query 'Functions[?starts_with(FunctionName, 'some-prefix-') == true].FunctionName' | jq "join($SEPARATOR)"
aws lambda list-functions --query "Functions[?starts_with(FunctionName, '$prefix')].FunctionArn" there was no need for == trueAs the answer is already given by @krishna, but I was looking for a way to print all function name without specifying a prefix. So here you can get all lambda function name in particular region my default is us-west-2.
aws lambda list-functions --query 'Functions[*].[FunctionName]'
Or as I want them out in text format and space separated to use in my bash script so here you can get in text and single line space separated.
aws lambda list-functions --query 'Functions[*].[FunctionName]' --output text | tr '\r\n' ' '
I have come here for some help to clean up all lambda functions that I have created while following an AWS developer certification tutorial. If anyone is in the same boat, I have created a script to programmatically delete all lambda functions in my AWS account (NOT for production use)
#!/bin/bash
# STOP: DON'T USE/RUN THIS SCRIPT UNLESS YOU ARE 100% SURE WHAT YOU ARE DOING
# I am a learner and created 20+ lambda functions while following a tutorial
# I wrote this script to programatically cleanup functions at the end of course
# precondition: your aws cli is configured
# get all functions from aws account
functions=(`aws lambda list-functions --query 'Functions[*].[FunctionName]' --output text`)
for i in "${functions[@]}"
do
#delete functions 1-by-1
aws lambda delete-function --function-name "$i"
echo "deleted $i"
done
You can easily get the list of all lambda functions in given region using below command:
aws lambda list-functions --region us-east-1 | jq -r .Functions[].FunctionName
Download the jq (Lightweight and flexible command-line JSON processor) from here: https://stedolan.github.io/jq/download/
Incase, someone is looking for a similar query with string present in the lambda function name as a substring, try below
aws lambda list-functions --region us-east-1 --query 'FunctionName[?contains(FunctionName, 'containing-string'] == 'true'].[FunctionName]' --output text
Note - the '[]' brackets around '.FunctionName' will provide with each fucntionName on a new line.
