foca/how_to_use.md

## how_to_use.md

      
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              how_to_use.md
            
          
    new_rails_app

This script is my way of creating rails apps without much trouble. It works better for me than Rails' templates, so this is what I use.
Basically, it clones a template app and then changes the name of the app.
It's a very simple solution that I've been using for a while now.
Installation

curl https://raw.github.com/gist/3063978/17a42cb07222147dad7caa830bf22a2e902b2347/new_rails_app.sh > new_rails_app
chmod +x new_rails_app

After that, make sure the new_rails_app script is somewhere in your $PATH.
Usage

new_rails_app TheAppsName

Configuration

There's none :)
If you want to change anything, you're more than welcome to create your own blank slate app that reflects your preferences and changing the script's line where $source is defined to point to your own repository.

  
## new_rails_app.sh
#!/usr/bin/env bash

# Convert ThisIsACamelizedWord to this_is_a_camelized_word
#
# Usage:
#   underscore ThisIsACamelizedWord
underscore() {
  echo "$@" | sed -e 's/\([A-Z\d]\)\([A-Z][a-z]\)/\1_\2/g' -e 's/\([a-z\d]\)\([A-Z]\)/\1_\2/g' | tr "A-Z-" "a-z_";
}

# Rename the Rails app in the current directory. Both the new and old names must
# be provided in CamelCase. The script will find CamelCase and unders_scored
# words to replace.
#
# Usage:
#   rename_rails_app "OldName" "NewName"
rename_rails_app() {
  if [ ${#@} -ne 2 ]; then
    echo "Usage:" 1>&2
    echo "  rename_rails_app \"OldName\" \"NewName\"" 1>&2
    return 1;
  fi

  local old_name="$1";
  local new_name="$2";

  local underscored_old_name=$(underscore $old_name);
  local underscored_new_name=$(underscore $new_name);

  find_and_replace_app_name() {
    for file in $(find .); do
      sed -i "" -e "s/$1/$2/g" $file 2>/dev/null;
    done
  }

  find_and_replace_app_name $old_name $new_name;
  find_and_replace_app_name $underscored_old_name $underscored_new_name;

  return 0;
}

# Print this program's help and exit.
usage() {
  script=$(basename $0)

  (
    echo "Usage:";
    echo "  $script AppName"
    echo
    echo "Make sure the name you provide is CamelCased"
  ) 1>&2

  exit 1
}

if [ ${#@} -ne 1 ]; then
  usage
fi

case $1 in
  -h | --help)
    usage
    ;;
  *)
    name="$1"
    dir=$(underscore $name)
    ;;
esac

source="http://github.com/foca/blank_slate_rails_app"

echo "- Cloning the blank slate app"
git clone "$source" "$dir" &>/dev/null
cd "$dir" &>/dev/null

rm -rf .git

echo "- Updating the javascript libraries"
script/update_javascripts &>/dev/null
rm script/update_javascripts

echo "- Renaming the app to \"${name}\""
rename_rails_app "BlankSlate" "$name"

echo "- Initializing the git repository"
(git init; git add .; git commit -m "Initial commit") &>/dev/null

echo
echo "==> Everything is ready, get to work!"
	#!/usr/bin/env bash

	# Convert ThisIsACamelizedWord to this_is_a_camelized_word
	#
	# Usage:
	# underscore ThisIsACamelizedWord
	underscore() {
	echo "$@" \| sed -e 's/\([A-Z\d]\)\([A-Z][a-z]\)/\1_\2/g' -e 's/\([a-z\d]\)\([A-Z]\)/\1_\2/g' \| tr "A-Z-" "a-z_";
	}

	# Rename the Rails app in the current directory. Both the new and old names must
	# be provided in CamelCase. The script will find CamelCase and unders_scored
	# words to replace.
	#
	# Usage:
	# rename_rails_app "OldName" "NewName"
	rename_rails_app() {
	if [ ${#@} -ne 2 ]; then
	echo "Usage:" 1>&2
	echo " rename_rails_app \"OldName\" \"NewName\"" 1>&2
	return 1;
	fi

	local old_name="$1";
	local new_name="$2";

	local underscored_old_name=$(underscore $old_name);
	local underscored_new_name=$(underscore $new_name);

	find_and_replace_app_name() {
	for file in $(find .); do
	sed -i "" -e "s/$1/$2/g" $file 2>/dev/null;
	done
	}

	find_and_replace_app_name $old_name $new_name;
	find_and_replace_app_name $underscored_old_name $underscored_new_name;

	return 0;
	}

	# Print this program's help and exit.
	usage() {
	script=$(basename $0)

	(
	echo "Usage:";
	echo " $script AppName"
	echo
	echo "Make sure the name you provide is CamelCased"
	) 1>&2

	exit 1
	}

	if [ ${#@} -ne 1 ]; then
	usage
	fi

	case $1 in
	-h \| --help)
	usage
	;;
	*)
	name="$1"
	dir=$(underscore $name)
	;;
	esac

	source="http://github.com/foca/blank_slate_rails_app"

	echo "- Cloning the blank slate app"
	git clone "$source" "$dir" &>/dev/null
	cd "$dir" &>/dev/null

	rm -rf .git

	echo "- Updating the javascript libraries"
	script/update_javascripts &>/dev/null
	rm script/update_javascripts

	echo "- Renaming the app to \"${name}\""
	rename_rails_app "BlankSlate" "$name"

	echo "- Initializing the git repository"
	(git init; git add .; git commit -m "Initial commit") &>/dev/null

	echo
	echo "==> Everything is ready, get to work!"