Converts NBLocalization to Swiftgens tr(.). Based on https://gist.github.com/Lutzifer/3e7d967f73e38b57d4355f23274f303d but changed regex to suit my own need.

replaceNSlocalized.sh

#/bin/sh

# Run this inside the project to replace NSLocalizedString calls with swiftgen calls in all .swift files.
# Do not forget to make a backup before.

find . -type f | grep ".swift" > swiftindex.temp

while IFS= read -r filename
do
  echo $filename
  grep -o "NBLocalization.stringForKey(\"[^\")]*\")" "$filename" > strings.temp
  while IFS= read -r localizable
  do
    echo $localizable
    replacement=$(ruby transformToTR.rb $localizable)
    echo "$replacement"
    sed -i .bak "s/$localizable/$replacement/g" $filename
    rm "$filename.bak"
  done < strings.temp
  rm strings.temp
done < swiftindex.temp
rm swiftindex.temp

transformToTR.rb

# takeas an NSLocalizedString(...) string and transforms it to the tr(...) format

localizable=ARGV[0]

def makeFirstLetterUpper(string, index)
  if index > 0
    return string[0].upcase + string[1..-1]
  end

  string
end

# remove all whitespace and "" and ,
localizable = localizable.gsub(/\s+/, "").gsub("\"", "").gsub(",", "")

# remoe leading and trailing code
localizable = localizable.gsub("NBLocalization.stringForKey(", "").gsub(")", "")

# handle _ like .
localizable = localizable.gsub("\_", ".")

# uppercase first letters of every word, leaving the rest be as it is
localizable = localizable.split(".").map.with_index { |a, i| makeFirstLetterUpper(a, i) }.join("")

puts "tr(.#{localizable})"