How to use magic regexp to replace in vim
How to use Vim magic regex to transform key-value pairs by lowercasing the key and wrapping it in a variable substitution syntax.
I have an input string and I would like to take the first column and transform it so that the value behind the = sign becomes the same as the key but lowercased and encapsulated in ${}.
The Vim substitution command below uses \v (very magic mode) to capture the key name with (\S+), then uses \L to lowercase the captured group and \E to end the case conversion. This is applied to a visual selection with '<,'>.
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vim
...
CLIENT_ID = "helloo-id"
TENANT_ID = "helloo-tenant"
CLIENT_SECRET = "helloo-client"
...
:'<,'>s/\v(\S+)\s\=\s(\S+)/\1 = "${\L\1\E}"/
Result:
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CLIENT_ID = "${client_id}"
TENANT_ID = "${tenant_id}"
CLIENT_SECRET = "${client_secret}"
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