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Template system for project skeletons

Project description

Voodoo is a template system for project skeletons (similar to the template part of PasteScript):

  • It can make a copy of a project skeleton processing some files, filter others, etc.

  • Works with local paths and git/hg URLs.

  • It generates a beautiful output and take care of not overwrite existing files, unless instructed to do so.

  • MIT License. See LICENSE for more details.

Voodoo sample output as used in a program.

Above, Voodoo sample output as used in a program


  • Pypy or Python 2.6, 2.7, 3.3 or newer.

  • It also uses the Jinja2 and Colorama Python libraries.

As a command line tool

Install it by doing:

$  pip install voodoo

Then, whenever you want to clone a project template to make a new project, do:

$  voodoo <Git URL or path to another folder> <New project name>


$  voodoo myapp

Or in your programs

First of all install it and/or add it to your requirements.txt:

$  pip install voodoo

The API is very simple. A render_skeleton function that takes two absolute paths: the project skeleton to process, and where to copy it.:

from voodoo import render_skeleton

render_skeleton(skeleton_path, new_project_path)

It also provide a prompt and prompt_bool functions that take user input, to help you to make interactive scripts.

How it works

The content of the files inside the skeleton are copied to the destination without changes, unless are suffixed with the extension ‘.tmpl’. In that case, the templating engine will be used to render them.

A slightly customized Jinja2 templating is used. The main difference is that variables are referenced with [[ name ]] instead of {{ name }} and blocks are [% if name %] instead of {% if name %}. To read more about templating see the Jinja2 documentation.

Use the data argument to pass whatever context you want to be available in the templates. The arguments can be any valid Python value, even a function:

from hashlib import sha256
from os import urandom
from voodoo import render_skeleton

data = {
    'package': 'demo',
    'py3': True,
    'make_secret': lambda: sha256(urandom(48)).hexdigest()
render_skeleton(skeleton_path, new_project_path, data=data)

so in your template you can have:

import [[ package ]]

secret = '[[ make_secret() ]]'
[% if py3 %]
msg = 'Python 3!'
[% else %]
msg = 'meh'
[% endif %]

Your folders and files can also use the [[ name ]] notation: mytemplate/[[ foo ]]/something/[[ bar ]].txt

Using it in a script

It’s easy to integrate Voodoo with your own scripts. The following example it’s a classic make new project script found in many popular frameworks:

from os.path import join, dirname, basename
from voodoo import render_skeleton

default_context = {
    'foo': 'bar',
SKELETON_PATH = join(dirname(__file__), '..', 'tests', 'demo')

def new_project(path, options):
       data = default_context.copy()
    data['project_name'] = basename(path)
    render_skeleton(SKELETON_PATH, path, data=data, **options)

if __name__ == '__main__':
       import argparse

    parser = argparse.ArgumentParser(description='Create a new project')
    parser.add_argument('path', help='The name or fullpath of the new project')
    parser.add_argument('-p', '--pretend', action='store_true',
                        help='Run but do not make any changes')
    parser.add_argument('-f', '--force', action='store_true',
                        help='Overwrite files that already exist, without asking')
    parser.add_argument('-s', '--skip', action='store_true',
                        help='Skip files that already exist, without asking')
    parser.add_argument('-q', '--quiet', action='store_true',
                        help='Suppress status output')

    args = parser.parse_args()
    da = vars(args)
    new_project(da.pop('path'), da)

You can se this example working in the examples folder. Play with it, generate a new project and manually update some files. Then run the script again to see how it detects what files has changed, and what files are identical and with no need of regeneration.

An interactive version of this script could be made using the voodoo.prompt and/or the voodoo.prompt_bool helper functions.

VCS Support

Voodoo supports rendering project skeletons from a version control system repository. Git and Mercurial are supported. It requires a working VCS command on your path: git or hg.

The forms of the URL is the same that the pip installer uses, detecting the type of VCS using URL prefixes: “git+” or “hg+”.


Currently supports cloning over git, git+https and git+ssh:


Passing branch names, a commit hash or a tag name is possible like so:



The supported schemes are: hg+http, hg+https, hg+static-http and hg+ssh:


You can also specify a revision number, a revision hash, a tag name or a local branch name like so:




render_skeleton (src_path, dst_path, data=None, filter_ext=None, pretend=False, force=False, skip=False, quiet=False, envops=None)


Absolute path to the project skeleton


Absolute path to where to render the skeleton


Data to be passed to the templates, as context.


A list of names or shell-style patterns matching files or folders that musn’t be copied. The default is: ['.*', '~*', '*.py[co]']


A list of names or shell-style patterns matching files or folders that must be included, even if its name are in the filter_this list. Eg: ['.gitignore']. The default is an empty list.


Run but do not make any changes


Overwrite files that already exist, without asking


Skip files that already exist, without asking


Suppress the status output


Extra options for the Jinja template environment.


prompt (text, default=None)

Ask a question via raw_input() and return their answer.


prompt text


default value if no answer is provided.


prompt_bool (text, default=False, yes_choices=None, no_choices=None)

Ask a yes/no question via raw_input() and return their answer.


prompt text


default value if no answer is provided.


default ['y', 'yes', '1', 'on', 'true', 't']


default ['n', 'no', '0', 'off', 'false', 'f']


Juan-Pablo Scaletti.


MIT, see LICENSE for more details.

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