Universal po mo php file script for WordPress plugins

i18n.sh

#!/usr/bin/env bash

# https://gist.github.com/rmpel/969508c652de6a9bf33e4ac0f89996a4

cd "$(dirname "$0")" || exit 1

SCRIPTDIR="$(pwd)"
SCRIPTFILE="$(basename "$0")"
SCRIPTPATH="$(realpath "$SCRIPTDIR"/"$SCRIPTFILE")"

I18NDIR="$(basename "$SCRIPTDIR")"

cd ".."

i18n_help() {
  echo "Usage: $SCRIPTFILE command"
  echo "commands:"
  echo "make-pot  : re-generate POT file from source"
  echo "update-po : update PO files from POT file"
  echo "make-mo   : generate MO and l10n.php files from PO files"
  echo "make      : run make-pot, update-po, and make-mo in sequence"
}

[ -z "$1" ] && i18n_help && exit 1

file=./style.css
if [ -f "$file" ]; then
  # Probably a theme.
  if grep -q "Text Domain:" "$file"; then
    TEXTDOMAIN=$(grep -o "Text Domain:\s*\([^'\"]*\)" "$file" | sed "s/Text Domain:\s*\([^'\"]*\)/\1/")
    TEXTDOMAIN=$(echo "$TEXTDOMAIN" | xargs)
  fi
fi
if [ -z "$TEXTDOMAIN" ]; then
  # Not a theme, so, try to find textdomain from ./*php
  for file in $(find . -name '*.php'); do
    if grep -q "Text Domain:" "$file"; then
      TEXTDOMAIN=$(grep -o "Text Domain:\s*\([^'\"]*\)" "$file" | sed "s/Text Domain:\s*\([^'\"]*\)/\1/")
      TEXTDOMAIN=$(echo "$TEXTDOMAIN" | xargs)
      break
    fi
  done
fi

if [ -z "$TEXTDOMAIN" ]; then
    echo "Text Domain not found in any PHP file, or style.css"
    echo "Make sure the main PHP file (for plugin) or style.css (for theme) has a comment block with the Text Domain in it based on WordPress Documentation standards."
    exit 1
fi

echo "Text Domain: $TEXTDOMAIN" >&2
echo "Translation files are in: $I18NDIR" >&2

# only define this function if the wp-command is not available
if ! command -v wp &> /dev/null; then
  wp () {
    if [ ! -f wp-cli.phar ]; then
      curl --silent --insecure -L -O https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli.phar 2>/dev/null
      chmod 755 wp-cli.phar
    fi
    ./wp-cli.phar --allow-root "$@"
  }
fi

i18n_make_pot() {
  wp i18n make-pot --no-location --domain="$TEXTDOMAIN" . "$I18NDIR"/"$TEXTDOMAIN".pot --exclude=languages --exclude=node_modules --exclude=vendor --exclude=tests --exclude=build --exclude=dist
}

i18n_update_po() {
  wp i18n update-po "$I18NDIR"/"$TEXTDOMAIN".pot "$I18NDIR"/
}

i18n_make_files() {
  wp i18n make-mo "$I18NDIR"/
  wp i18n make-php "$I18NDIR"/
}

case "$1" in
    "make-pot")
        i18n_make_pot
        ;;
    "update-po")
        i18n_update_po
        ;;
    "make-mo")
        i18n_make_files
        ;;
    "make")
        i18n_make_pot
        i18n_update_po
        i18n_make_files
        ;;
    *)
        echo "Unknown command"
        i18n_help
        ;;
esac