Recursively remove trailing whitepace from files.

remove_trailing_whitespace.sh

# Remove trailing whitespace from files in the src directory.

# This is useful because (for example) trailing whitespace hinders Vim's 
# paragraph movement.

# INFO: http://stackoverflow.com/a/4438318/574190
# INFO: http://stackoverflow.com/q/1583219/574190

# The directory under which we want to search for files.
ROOT_DIRECTORY="$1"

# Get a list of files in the src directory (this is specific to this project)
# which match the passed in matcher.
function find_src_files_of_name {
  find "$ROOT_DIRECTORY" -type f -name "$1" -print0 
}

# Given a list of files, remove trailing whitespace from them.
function remove_trailing_whitespace {
  # This is specific to OSX. The linux version would not need the single quotes
  # after the -i flag.
  # The e flag indicates extended regular expressions.
  xargs -0 sed -i '' -e 's/[[:space:]]*$//' 
}

# Usage Examples

find_src_files_of_name '*.scss' | remove_trailing_whitespace
find_src_files_of_name '*.js' | remove_trailing_whitespace
find_src_files_of_name '*.html' | remove_trailing_whitespace
find_src_files_of_name '*.rb' | remove_trailing_whitespace