To duplicate components

duplicate_components.sh

# $1=<new template component name>
# $2=<new template function name>
# expected file structure
# components
#   / TemplateComponent
#     / index.ts
#     / TemplateComponent.tsx
#     / TemplateComponent.test.tsx
#     / TemplateComponent.module.scss
#     / templateFunction.ts
#     / templateFunction.test.ts

# COMPONENT_DIR=<path/to/components>
COMPONENT_DIR=.
TEMPLATE_COMPONENT="TemplateComponent"
TEMPLATE_FUNCTION="templateFunction"
INDEX_FILE="index.ts"
NEW_COMPONENT_NAME=$1
NEW_FUNCTION_NAME=$2
OLD_DIR=$COMPONENT_DIR/__$TEMPLATE_COMPONENT
NEW_DIR=$COMPONENT_DIR/$NEW_COMPONENT_NAME
# getting all template file names in templates directory
TEMPLATE_NAMES=$(ls $OLD_DIR)

[ -d "$NEW_DIR" ] && rm -rf $NEW_DIR && echo "> $NEW_DIR already existed and has been replaced"

cp -r $OLD_DIR $NEW_DIR
echo "> duplicated $OLD_DIR with $NEW_DIR"

# replaces all instances of template name with new name
replace_instances () {
  local file="$1"
  local template_name="$2"
  local new_name="$3"
  sed -i '' -e "s/${template_name}/${new_name}/g" $NEW_DIR/$file
  echo "> replaced all instances of $template_name with $new_name inside of $NEW_DIR/$file"
}

replace_name () {
  local file="$1"
  local template_name="$2"
  local new_name="$3"
  # replaces string of current filename with new filename and stores in variable
  NEW_FILENAME=${file/${template_name}/${new_name}}
  # renames current filename with new filename
  mv $NEW_DIR/$file $NEW_DIR/$NEW_FILENAME
  echo "> renamed $file to $NEW_FILENAME"
  replace_instances $NEW_FILENAME $template_name $new_name
}

for file in $TEMPLATE_NAMES
do
  case $file in
    (*$TEMPLATE_COMPONENT*)
      replace_name $file $TEMPLATE_COMPONENT $NEW_COMPONENT_NAME
      ;;
    (*$TEMPLATE_FUNCTION*)
      # if second variable does not exist, remove from file system
      if [ -z ${2+x} ]; 
        then 
          rm $NEW_DIR/$file
          echo "> removed $NEW_DIR/$file"
        else 
          replace_name $file $TEMPLATE_FUNCTION $NEW_FUNCTION_NAME
      fi
      ;;
    $INDEX_FILE)
      # index.ts is a separate case and only needs to replace 
      replace_instances $file $TEMPLATE_COMPONENT $NEW_COMPONENT_NAME
  esac
done