templates on bdsm

template_.conf

a={{a}}
b={{b}}
c={{c}}
d={{d}}
e={{e}}

template_.conf.settings

case $target in
  template_a.conf)
    replacements=( 
      a "b a"
      d e
      ".*" ""
    )
    ;;
  *)
    echo "no settings for $target"
    ;;
esac

templates

#!/bin/bash

source /usr/local/bdsm/modules/bash/trace/dsl
source /usr/local/bdsm/modules/bash/core/dsl
source /usr/local/bdsm/modules/bash/variables/dsl
source /usr/local/bdsm/modules/bash/filesystem/dsl
source /usr/local/bdsm/modules/bash/array/dsl
source /usr/local/bdsm/modules/bash/logging/dsl
source /usr/local/bdsm/modules/bash/templates/dsl

action=$1
shift

usage(){
  echo "Usage:
  $0 list                     #show available templates
  $0 list all                 #show available templates with generated files
  $0 list [template name]     #show generated files for given template
  $0 apply [target file name] #apply template on the given file
"
}

list_template() {
  local template="$1"
  local settings="$template.settings"
  echo "Template: $template"
  if [[ -f $settings ]]
  then
    echo "Template settings: $template.settings"
  else
    echo "Template settings are missing: $template.settings"
  fi
  [[ "$2" == "generated" ]] && find ${template/_./_\*.} -not -name $template
}

list_all() {
  local template
  for template in *_.*
  do
    list_template "$template" "$1"
  done
}

apply(){
  target="${1}"
  template="${1/_*./_.}"
  settings="${template}.settings"
  . $settings
  cp -f $template $target
  seed_template $target "${replacements[@]}"
  unset $replacements
}

less_diff(){
  target="${1}"
  target_new="${1}.new"
  template="${1/_*./_.}"
  settings="${template}.settings"
  . $settings
  cp -f $template $target_new
  seed_template $target_new "${replacements[@]}"
  diff -u $target $target_new | less
  rm -rf $target_new
  unset $replacements
}

case "$action" in
  list)
    case "x$1" in
      xall)
        list_all generated
        ;;
      x)
        list_all
        ;;
      *)
        list_template "$1" generated
        ;;
    esac
    ;;
  apply)
    apply "$@"
    ;;
  diff)
    less_diff "$@"
    ;;
  *)
    usage
    ;;
esac