How to pipe `terraform state show` outputs to a bash variable?

Question

I have a bash script where I'm trying to isolate a string of the form z="y=x" so that I can use eval $z in order to create a env variable y with value 'x'. Here's my code:

xxx=$(terraform state show aws_s3_bucket.prod_bucket | grep website_endpoint | sed 's/ //g')
echo $xxx
>>>website_endpoint="my-site.s3-website-us-east-1.amazonaws.com"
eval $xxx
>>>-bash: website_endpoint=my-site.s3-website-us-east-1.amazonaws.com: command not found

What perplexes me about the failure of this code is that I do something very similar to convert the contents of a .env file to working environment variables:

cmd=$(sed -ne '/^#/d; /^export / {p;d}; /.*=/ s/^/export / p' .env)
eval $cmd     ### works!

Why does the latter work but not the prior?

Edit: Now that I've identified the problem as being with terraform and not bash, I've changed the title to reflect that

Answer 1

OK, I figured out what was going on here. The terraform state show command will, by default, include escape characters for color, emboldening, etc. Unfortunately, these characters do not show up at all in the terminal because, oddly, they seem to switch off any visible effect whenever it actually goes to print anything! So in my case, the $xxx looked like this:

[1m[0mwebsite_endpoint[0m[0m="magnus-misc-v2.s3-website-us-east-1.amazonaws.com"

... and since [0m removes all formatting and colors, I was given no visual clue that this jazz was in there disrupting my eval-ing. So the fix in my case was to use the terraform state show -no-color flag. Not really a bash issue, rather, some confusing stuff in the terraform CLI.

Answer 2

Whenever you have a string which represents a string variable assignment, a safe and simple way to perform that assignment is declare (and Using More Quotes™):

$ xxx='website_endpoint="my-site.s3-website-us-east-1.amazonaws.com"'
$ declare "$xxx"
$ echo "$website_endpoint"
"my-site.s3-website-us-east-1.amazonaws.com"