oh-my-zsh/plugins/web-search/web-search.plugin.zsh

# web_search from terminal

function web_search() {
  emulate -L zsh

  # define search engine URLS
  typeset -A urls
  urls=(
    google      "https://www.google.com/search?q="
    bing        "https://www.bing.com/search?q="
    yahoo       "https://search.yahoo.com/search?p="
    duckduckgo  "https://www.duckduckgo.com/?q="
    yandex      "https://yandex.ru/yandsearch?text="
    github      "https://github.com/search?q="
  )

  # check whether the search engine is supported
  if [[ -z "$urls[$1]" ]]; then
    echo "Search engine $1 not supported."
    return 1
  fi

  # search or go to main page depending on number of arguments passed
  if [[ $# -gt 1 ]]; then
    # build search url:
    # join arguments passed with '+', then append to search engine URL
    url="${urls[$1]}${(j:+:)@[2,-1]}"
  else
    # build main page url:
    # split by '/', then rejoin protocol (1) and domain (2) parts with '//'
    url="${(j://:)${(s:/:)urls[$1]}[1,2]}"
  fi

  open_command "$url"
}


alias bing='web_search bing'
alias google='web_search google'
alias yahoo='web_search yahoo'
alias ddg='web_search duckduckgo'
alias yandex='web_search yandex'
alias github='web_search github'

#add your own !bang searches here
alias wiki='web_search duckduckgo \!w'
alias news='web_search duckduckgo \!n'
alias youtube='web_search duckduckgo \!yt'
alias map='web_search duckduckgo \!m'
alias image='web_search duckduckgo \!i'
alias ducky='web_search duckduckgo \!'