$ npm install --global wp-pot-cli

$ wp-pot --help
  Generate pot-files for WordPress localization
  Usage
    $ wp-pot <options>
  Options
    --bug-report, -b Header with URL for reporting translation bugs
    --comment-keyword, -c Comment keyword
    --dest-file, -o Destination file
    --domain, -d Domain to retrieve the translated text
    --last-translator, -l Name and email address of the last translator (ex: John Doe <me@example.com>)
    --no-file-paths, Don't write file paths to pot file
    --relative-to, -r Path to folder that file comments should be relative to
    --src, -s  Source files, multiple sources is allowed
    --team, -t Name and email address of the translation team (ex: Team <team@example.com>)
    --package, -p Package name
    --write-file, -w Write file
  Examples
    $ wp-pot --src 'src/*.php' --src 'extras/*.php'