I have an yaml object like below

input="poc_string: 'This is my succeeding string!'
poc_fail: false"

I want to convert this to the string below

'{"poc_string":"This is my succeeding string!","poc_fail":false}'

The following has to change

• single qoutes aroung This is my succeeding string! to double quotes
• all strings before and after : except true or false should get enclosed in double quotes " "
• the new line should be replaced with a comma ,. However, if the new line is the very end, , should not be inserted.

This needs to be done in sed
I am new to sed and bash in general so, I have started with the below command (going one by one)

output=$(echo $sql | sed -r "s/'/"/g" | sed -r "s/: /:/g"| sed -rE "s/(w*):/"&"/g")
echo $output

• First, I replaced ' with ", worked fine
• Second, replaced spaces after :, worked fine
• Now, trying to wrap all text before : with quotes and it doesn’t work.

my output as of now is poc_string:'This is my succeeding string!' poc_fail:false

How to get the output I desire?

ps: I am working with ubuntu 22.04.3 (it was mentioned in some online artifacts the OS is important)