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kristjan/gist:805168

Created February 1, 2011 00:40
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A little something to prevent hanging greps
Raw
gistfile1.rb
#!/usr/bin/env ruby
query = $*.shift
if $*.empty? && $stdin.tty?
puts "You haven't given grep anything"
else
cmd = %(grep "#{query}" #{$*.join(' ')})
puts `#{cmd}`
end
@jneen
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jneen commented Mar 10, 2011

Nice! Probably more portable in bash, I think:

function fancy-grep() {
  local query="$1"; shift
  if [[ -z "$@" ]] && [[ -t 0 ]]; then
    echo "You haven't given grep anything." >&2
  else
    /bin/grep "$query" "$@"
  fi
}

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