Small script to find missing translation strings in Processing

missing.sh

#!/bin/bash
# Small script to find missing translation strings in Processing
#
# Use with no arguments to find strings that are in the codebase but have not
# been added to the default language file.
#
# Use with a language code as first argument to find strings that are in the
# default properties file but have not yet been translated to the given
# language.

set -e

function language_file() {
  local base="build/shared/lib/languages"
  echo "$base/PDE${1:+_$1}.properties"
}

function code_keys() {
  egrep -Roh 'Language\.(text|interpolate|pluralize)\("[a-z0-9_.]+"' --include=*.java . |
  awk -F '"' '{ print $2 }' |
  sort |
  uniq
}

function properties_keys_depluralize() {
  properties_keys |
  grep -v '\.[0-9]$' |
  sed 's/\.n$//'
}

function properties_keys() {
  awk '/^[a-z0-9_.]+ = / { print $1 }' < "$(language_file $1)" |
  sort
}

function help() {
  echo "usage: ./missing.sh [language_code]"
}

function main() {
  if [ "$1" = "--help" ]; then
    help
    exit 1
  fi

  if [ -z $1 ]; then
    comm -3 <(code_keys) <(properties_keys_depluralize)
    return
  fi

  if [ ! -f "$(language_file $1)" ]; then
    echo "No language file for $1."
    return
  fi

  comm -3 <(properties_keys) <(properties_keys $1)
}

main $1