javascript
const regex = /^([A-Z_][A-Z0-9_]*)=(.*)$/gm;
const result = [...str.matchAll(regex)];
python
import re
pattern = re.compile(r'^([A-Z_][A-Z0-9_]*)=(.*)$', re.MULTILINE)
result = pattern.findall(text)
go
import "regexp"
re := regexp.MustCompile(`(?m)^([A-Z_][A-Z0-9_]*)=(.*)$`)
result := re.FindAllString(text, -1)