doctr 1.7.3

Deploy docs from Travis to GitHub pages.

Doctr
=====

A tool for automatically deploying docs from Travis CI to GitHub pages.

Doctr helps deploy things to GitHub pages from Travis CI by managing the
otherwise complicated tasks of generating, encrypting, managing SSH deploy
keys, and syncing files to the ``gh-pages`` branch. Doctr was originally
designed for documentation, but it can be used to deploy any kind of website
to GitHub pages that can be built on Travis CI. For example, you can use Doctr
to deploy a `blog
<http://www.asmeurer.com/blog/posts/automatically-deploying-this-blog-to-github-pages-with-travis-ci/>`_
or website that uses a `static site generator <https://www.staticgen.com/>`_.

Contribute to Doctr development on `GitHub
<https://github.com/drdoctr/doctr>`_.

Installation
------------

Install Doctr with pip

.. code::

pip install doctr

or conda

.. code::

conda install -c conda-forge doctr

**Note that Doctr requires Python 3.5 or newer.**

Usage
-----

Run Doctr configure
~~~~~~~~~~~~~~~~~~~

First use Doctr to generate the necessary key files so that travis can push
to your gh-pages (or other) branch.

Run

.. code::

doctr configure

and enter your data. You will need your GitHub username and password, and the
repo organization / name for which you want to build the docs.

**Note**: That repo should already be set up with Travis. We recommend enabling
`branch protection <https://help.github.com/articles/about-protected-branches/>`_
for the ``gh-pages`` branch and other branches, as the deploy key
used by Doctr has the ability to push to any branch in your repo.

Edit your travis file
~~~~~~~~~~~~~~~~~~~~~

Doctr will output a bunch of text as well as instructions for next steps. You
need to edit your ``.travis.yml`` with this text. It contains the secure key
that lets travis communicate with your GitHub repository, as well as the
code to run (in ``script:``) in order to build the docs and deploy Doctr.

Your ``.travis.yml`` file should look something like this:

.. code:: yaml

# Doctr requires python >=3.5
language: python
python:
- 3.6

# This gives Doctr the key we've generated
sudo: false
env:
global:
secure: "<your secure key from Doctr here>"

# This is the script to build the docs on travis, then deploy
script:
- set -e
- pip install doctr
- cd docs
- make html
- cd ..
- doctr deploy . --built-docs path/to/built/html/

See `the travis config file
<https://github.com/drdoctr/doctr/blob/master/.travis.yml>`_ used by Doctr itself for example.

You can deploy to a different folder by giving it a different path in the call
to ``deploy``. E.g., ``doctr deploy docs/``.

If you don't already have a gh_pages branch Doctr will make one for you.

.. warning::

Be sure to add ``set -e`` in ``script``, to prevent ``doctr`` from running
when the docs build fails.

Put ``doctr deploy .`` in the ``script`` section of your ``.travis.yml``. If
you use ``after_success``, it will `not cause
<https://docs.travis-ci.com/user/customizing-the-build#Breaking-the-Build>`_
the build to fail.

Commit your new files and build your site
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

``doctr configure`` will create a new file that contains your key. Commit this as
well as the changes to ``.travis.yml``. Once you push to GitHub, travis should
now automatically build your documentation and deploy it.

Notes
-----

**Doctr requires Python 3.5 or newer.** Be sure to run it in a
Python 3.5 or newer section of your build matrix. It should be in the same
build in your build matrix as your docs build, as it reuses that.

**Doctr does not require Sphinx.** It will work with deploying anything to
GitHub pages. However, if you do use Sphinx, Doctr will find your Sphinx
docs automatically (otherwise use ``doctr deploy . --built-docs <DOCS PATH>``).

FAQ
---

- **Why did you build this?**

Deploying to GitHub pages from Travis is not amazingly difficult, but it's
difficult enough that we wanted to write the code to do it once. We found
that Travis docs uploading scripts are cargo culted and done in a way that
is difficult to reproduce, especially the do-once steps of setting up keys.
The ``doctr configure`` command handles key generation automatically, and
tells you everything you need to do to set Doctr up. It is also completely
self-contained (it does not depend on the ``travis`` Ruby gem). The ``doctr
deploy`` command handles key decryption (for deploy keys) and hiding tokens
from the command output (for personal access tokens).

Furthermore, most Travis deploy guides that we've found recommend setting up
a GitHub personal access token to push to GitHub pages. GitHub personal
access tokens grant read/write access to all public GitHub repositories for
a given user. A more secure way is to use a GitHub deploy key, which grants
read/write access only to a single repository. Doctr creates a GitHub deploy
key by default (although the option to use a token exists if you know what
you are doing).

- **Why not Read the Docs?**

Read the Docs is great, but it has some limitations:

- You are limited in what you can install in Read the Docs. Travis lets you
run arbitrary code, which may be necessary to build your documentation.

- Read the Docs deploys to readthedocs.io. Doctr deploys to GitHub pages.
This is often more convenient, as your docs can easily sit alongside other
website materials for your project on GitHub pages.

In general, you should already be building your docs on Travis anyway (to
test that they build), so it seems natural to deploy them from there.

- **Why does Doctr require Python 3.5 or newer?**

There are several language features of Python that we wanted to make use of
that are not available in earlier versions of Python, such as `keyword-only
arguments <https://www.python.org/dev/peps/pep-3102/>`_,
`subprocess.run
<https://docs.python.org/3/library/subprocess.html#subprocess.run>`_, and
`recursive globs <https://docs.python.org/3/library/glob.html>`_. These
features help keep the Doctr code cleaner and more maintainable.

If you cannot build your documentation in Python 3, you will need to
install Python 3.6 in Travis to run Doctr.

- **Is this secure?**

Doctr enables creates an encrypted SSH deploy key, which allows any Travis
build on your repo to push to the deploy repo. The deploy key is encrypted using
`Fernet encryption from the Python cryptography
module <https://cryptography.io/en/latest/fernet/>`_. The Fernet key is then
encrypted to a secure environment variable for Travis using the `Travis
public key <https://docs.travis-ci.com/user/encryption-keys/>`_.

Travis does not make secure environment variables available to pull requests
builds. Furthermore, Doctr itself does not push from any branch other than
``master`` by default, although this :ref:`can be changed <any-branch>`.

By default, Doctr uses deploy keys, but it can also use a GitHub
personal access token, using the ``--token`` flag. However, this is not
recommended, as a GitHub personal access token grants access to your entire
account, whereas a deploy key only grants push access only to a single
repository.

Both Doctr and Travis CI itself take measures to prevent the private
encryption key from leaking in the build logs.

At any time, you can revoke the deploy key created by Doctr by going to the
deploy key settings for the repository in GitHub at
:samp:`https://github.com/{org}/{repo}/settings/keys`. Personal access
tokens can be revoked at `https://github.com/settings/tokens
<https://github.com/settings/tokens>`_. If you revoke a key, you will need
to rerun ``doctr configure`` to generate a new one to continue using Doctr.

- **Can Doctr do X?**

See the :ref:`recipes` page for many common use case recipes for Doctr.
Doctr supports virtually anything that involves pushing from Travis CI to
GitHub automatically.

- **I would use this, but it's missing a feature that I want.**

Doctr is still very new. We welcome all `feature requests
<https://github.com/drdoctr/doctr/issues>`_ and `pull requests
<https://github.com/drdoctr/doctr/pulls>`_.

- **Why is it called Doctr?**

Because it deploys **doc**\ umentation from **Tr**\ avis. And it makes you
feel good.

Projects using Doctr
--------------------

- `SymPy <http://www.sympy.org/en/index.html>`_

- `conda <http://conda.pydata.org/docs/>`_

- `doctr <https://drdoctr.github.io/doctr/>`_

- `PyGBe <https://barbagroup.github.io/pygbe/docs/>`_

- `xonsh <http://xon.sh>`_

Are you using Doctr? Please add your project to the list!