bangtext

Bang

A static site generator, powers marcyes.com <http://marcyes.com>__

You run bang from the command line:

::

$ bang command --project-dir=...

---

1 minute getting started

First, install bang:

::

$ pip install bang

Make a new project:

::

$ bang generate --project-dir=~/bang-quickstart

Then compile your new project:

::

$ bang compile --project-dir=~/bang-quickstart

And start up the development server to take a look at your new project:

::

$ bang serve --project-dir=~/bang-quickstart

Now, open a browser and load localhost:8000 to see your masterpiece, that's it!

---

Setup and Configuration

A bang site can have any folder structure and bang will check each folder for a markdown (extension .md) file, if it finds one named index.md it will not treat it like a blog post but just compile the folder to an index.html file. If it finds a markdown file with any other name, then it is considered a blog post with the file's name being the title. So, if you have this file structure:

::

project-dir/
  input/
    2014/
      001-this-is-the-slug/
        This is the title of the blog post.md

It would compile down to a blog post with a title This is the title of the blog post available at the uri:

::

/2014/001-this-is-the-slug

Any other files (images or whatnot) will just be copied over to their respective locations.

Project Directory

Your project directory is where all the magic happens. It has to contain
a few folders:

input (required)
^^^^^^^^^^^^^^^^

This is where everything you want to be in the final output folder
should go, this includes your blog posts and any other files/folders you
want your *live* static site to contain.

template (required)
^^^^^^^^^^^^^^^^^^^

This is where all your `Jinja <http://jinja.pocoo.org/>`__ templates go,
they are used to compile your blog posts to their final form. Bang looks
for a few template files by default for blog posts:

-  ``post.html`` - This contains the html for rendering a post's
   permalink page.
-  ``posts.html`` - This contains the html for rendering a list of
   posts.
-  ``aux.html`` - The template for rendering any non-post markdown files
   (index.md files)

output (optional)
^^^^^^^^^^^^^^^^^

This is the default output directory when the ``compile`` command is
used with no ``--output-dir`` argument.

bangfile.py (optional)
^^^^^^^^^^^^^^^^^^^^^^

You can add this file to configure bang when compiling:

.. code:: python

    # /project_dir/bangfile.py
    from bang import event

    @event("config")
    def configure(event_name, conf):
        conf.name = "your site name"
        conf.description = "your site description"
        conf.host = "example.com"

Environment configuration

If you don't want to bother with a bangfile.py in your project directory, Bang can also be configured using environment variables, basically, any BANG_* environment variables wil be put into the configuration, here are a couple you might want to set:

• BANG_HOST -- the host of your website, this is used to generate urls and stuff.
• BANG_SCHEME -- the http method to use (either http or https).

You can also combine a bangfile with the environment, this makes it easy to have different environments:

.. code:: python

# /project_dir/bangfile.py
import os

from bang import event

@event("config")
def configure(event_name, conf):

    conf.name = "your site name"
    conf.description = "your site description"

    # change the host and scheme based on the environment
    env = os.environ.get("BANG_ENV", "prod")
    if env == "prod":
        conf.host = "example.com"
        conf.scheme = "https"
    else:
        conf.host = "localhost"
        conf.scheme = "http"

---

Markdown

For the most part, Bang uses vanilla markdown, but there are some enhancements you can take advantage of if you like:

Easy Footnotes

Using the ``^n`` footnote will just assign footnotes in order:

::

    first[^n] second[^n]

    [^n]: this will be assigned to the "first" footnote
    [^n]: this will be assigned to the "second" footnote

That way you don't have to worry about uniquely naming footnotes since
they are just assigned in order, but if you want to give your footnotes
unique names that works also.

Easy links
~~~~~~~~~~

Similar to the footnotes, using the ``n`` reference name:

::

    [first][n]
    [second][n]

    [n]: http://first.com
    [n]: http://second.com

Easy images
~~~~~~~~~~~

If no title is used, then the alt becomes the title:

::

    ![this will be the title](path/to/image.jpg)

--------------

Commands
--------

compile
~~~~~~~

Use this to compile your ``project-dir/input`` directory to the final
form in the ``output-dir`` directory.

Compile your site using the default output directory:

::

    $ bang compile --project-dir=...

That will place the compiled output to ``project-dir/output``, you can
also move the output directory to another location:

::

    $ bang compile --project-dir=... --output-dir=...

serve
~~~~~

Use this to fire up a local server so you can see your compiled site.
You can set the port with the ``--port`` flag.

::

    $ bang server --project-dir=... --port=8000

watch
~~~~~

This is designed to be used on the remote server that will host your
site in a cron job, it will try and pull down the code using a git repo,
if there are changes, then it will compile the new changes, since it is
run in cron, you should include the full path:

::

    $ /usr/local/bin/bang watch --project-dir=...

generate
~~~~~~~~

Generate a site skeleton that you can use as a starting point to your
own bang site, this will take the ``project_dir`` and make sure it
exists (or create it) and then add ``input`` and ``template`` dirs along
with skeleton template files.

::

    $ bang generate --project-dir=...

--------------

Events
------

Events are callbacks that are fired at specific times.

The easiest way to hook these in to your site compiling is to define or
import them into your ``bangfile.py`` configuration file. You can see
examples of how they are used in the ``bang.plugins``
`module <https://github.com/Jaymon/bang/tree/master/bang/plugins>`__.

Events are basically defined like this:

.. code:: python

    from bang import event, echo

    @event("output.finish")
    def callback(event_name, site):
        """print all the post titles and urls to the screen"""
        for p in site.posts:
            echo.out(p.title)
            echo.err(p.url)

Some Common Events

config ^^^^^^

This is called right after the bangfile is loaded in order to set initial global configuration.

output.finish ^^^^^^^^^^^^^

This event is fired after all the posts are compiled, right now it is used to do things like generating RSS feeds and the sitemap.

context.NAME ^^^^^^^^^^^^

Anytime the configuration context changes, this event is called, when the html pages are generated, context.web is the broadcast event, the feed plugin will broacast context.feed and the sitemap plugin will broadcast context.sitemap.

.. code:: python

from bang import event

@event("context.web")
def callback(event_name, config):
    """allows custom configuration for web context"""
    pass

---

Testing

If you cloned this repo, you can test out bang by running (from the repo working directory:

::

$ python -m bang generate -d /path/to/testsite/
$ python -m bang compile -d /path/to/testsite/
$ python -m bang serve -d /path/to/testsite/

You can also run the unit tests:

::

$ python -m unittest bang_test

---

Install

Use pip:

::

pip install bangtext