erb2haml.sh

erb2haml.sh

#!/bin/sh

check_gem() {
  REPLY=$(gem which $1 &>/dev/null)
}


convert() {
  printf "Starting conversion\n["

  for erb_file in `find . -name '*.erb'`
  do
    printf "."
    html2haml -r $erb_file `ruby -e "puts '$erb_file'.sub(/erb$/,'haml')"`
    rm $erb_file
  done

  printf "]\nDone.\n"
}


if 
  check_gem haml
  check_gem hpricot
  check_gem ruby_parser
then
  convert
  exit 0
else
  echo "To use $0 you need to have the following gems installed: haml, hpricot and ruby_parser"
  exit 1
fi

Need someone who is better in shell scripting than me + google. I want to AND bind the calls of check_gem in lines 24-26.

Not much time. Have a look at man test

there you go. A bit hacky, but it works