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How can I transform a string "foo, bar, xid, uid" to a list ["foo", "bar", "xid", "uid"]?

I'm assigninng to variable value from Consul which is a string

my_var = "foo, bar, xid, uid"

Now I would like to convert my_var to a list that will look like this:

my_list = ["foo", "bar", "xid", uid"]

How can I achieve that? I was trying to use formatlist and the splat operator for that but no success 

my_list = ${formatlist(<put magic here>, var.my_var)
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2 Answers 2

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11

You can use the split function here:

my_list = ${split(",", var.my_var)}
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8

ydaetskcoR's answer is essentially correct, but in Terraform 0.12 syntax has changed, and the split function line should read: 

my_list = split(",", var.my_var)
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We probably want to have a think as a community about how we handle things that are pure syntax updates due to HCL2. I am unsure whether we should leave things as is or whether we should follow the Terraform docs and move everything to HCL2 with a series of edits of existing posts once they consider 0.12 and HCL2 adoption to be complete enough that the provider docs all change. I don't think there's a huge amount of value in duplicating every HCL1 post with the HCL2 syntax.

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