rubyctags - Bash script for generating an Exuberant Ctags file for a Ruby project

gistfile1.sh

#!/usr/bin/env bash

# Generate an Exuberant Ctags file for a Ruby project
#
# - Accepts an optional argument of the starting search directory or file.
# - The starting path will be walked up until either a tags file or other
#   project root indicating file/dir can be found.

tags_file=.tags
declare -a root_markers=(.git .hg .svn .bzr _darcs)

! [ -z "$1" ] && cd "${1%/*}"
starting_dir=$PWD

root_markers[${#root_markers[@]}]=$tags_file
while [[ $PWD != '/' ]]; do
  for marker in ${root_markers[@]}; do
    if [ -e "${PWD}/${marker}" ]; then
      ctags_dir=$PWD
      break
    fi
  done
  cd ..
done

if [ -z "$ctags_dir" ]; then
  echo "Unable to locate a $tags_file file or suitable project root at or above $starting_dir"
else
  find "$ctags_dir" -name '*.rb'|ctags -f "$ctags_dir/$tags_file" -L -
  echo "Updated $ctags_dir/$tags_file"
fi

cd $starting_dir