curl http://amazonlinux.ap-northeast-2.amazonaws.com/2017.12/extras-catalog.json
{"motd": "", "status": "ok", "version": 1, "whitelists": [[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]], "topics": [
{"n": "ansible2", "inst": ["ansible"], "versions": ["2.4.2"]},
{"n": "emacs", "inst": ["emacs"], "versions": ["25.3"]},
{"n": "memcached1.5", "inst": ["memcached"], "versions": ["1.5.1"], "visible": ["memcached", "memcached-devel"]},
{"n": "nginx1.12", "inst": ["nginx"], "versions": ["1.12.2"]},
{"n": "postgresql9.6", "inst": ["postgresql"], "versions": ["9.6.6"]},
{"n": "python3", "inst": ["python3", "python3-pip", "python3-setuptools", "python3-wheel"], "versions": ["3.6.2"]},
{"n": "redis4.0", "inst": ["redis"], "versions": ["4.0.5"]},
{"n": "R3.4", "inst": ["R"], "versions": ["3.4.3"]},
{"n": "rust1", "inst": ["rust", "cargo"], "versions": ["1.22.1"]},
{"n": "vim", "inst": ["vim-enhanced", "vim-minimal"], "versions": ["8.0"]},
{"n": "golang1.9", "inst": ["golang"], "versions": ["1.9.2"]},
{"n": "ruby2.4", "inst": ["ruby", "ruby-irb", "rubygem-rake", "rubygem-json", "rubygems"], "versions": ["2.4.2"]},
{"n": "nano", "inst": ["nano"], "versions": ["2.9.1"]},
{"n": "php7.2", "inst": ["php-cli", "php-pdo", "php-fpm", "php-json", "php-mysqlnd"], "versions": ["7.2.0"]},
{"n": "lamp-mariadb10.2-php7.2", "inst": ["php-cli", "php-pdo", "php-fpm", "php-json", "php-mysqlnd", "mariadb"], "versions": ["10.2.10_7.2.0"]}
]}