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How to build the Ghostscript documentation
==========================================
Welcome to the Ghostscript documentation. This documentation relies on Sphinx (https://www.sphinx-doc.org/en/master/) to publish HTML & PDF docs from markdown files written with restructured text / RST (https://en.wikipedia.org/wiki/ReStructuredText).
Installing Sphinx & dependencies
--------------------------------
1. You should follow the instructions on the Sphinx website to install Sphinx on your system.
2. Ensure you have Latex (https://www.latex-project.org/get/) installed
This ensures that you can build a PDF of the documentation.
3. The Sphinx documentation files also rely on the "readthedocs" theme to be installed, follow the instructions here: https://sphinx-rtd-theme.readthedocs.io/en/stable/installing.html
4. Once you have installed the "readthedocs" theme, depending on your OS, it will also have installed a `docutils` (http://docutils.sourceforge.net/) Python package.
This should be okay, however if you have issues with building docs for PDF ensure that the `docutils` version works for you.
To see what version you have do:
python3 -m pip show docutils
On Windows the required version was 0.18.1 to build PDF docs (pip install docutils=0.18.1), however on other systems lower versions were fine.
Editing the documentation
-------------------------
Within this `src` folder update the associated `.rst` files which are in restructured text format. These files represent the corresponding document pages.
Some notes on syntax
~~~~~~~~~~~~~~~~~~~~
- Use ``for inline code`` or ``computer/technical terminology``
- Use tab indented code for code blocks with, e.g. .. code-block:: bash
- For device names use :title:`deviceName` , e.g. :title:`pdfwrite`
- For headers underline text with ==== for h1 level, ---- for h2, ~~~~ for h3 & """" for h4
For full details on RST syntax, see: https://www.sphinx-doc.org/en/master/usage/restructuredtext/
Building HTML documentation
---------------------------
From the `doc` location run:
sphinx-build -b html src build
This then creates the HTML documentation within `doc/build` for your review, you can then run `build/index.html` to check out the results.
Building PDF documentation
--------------------------
Ensure that `pdflatex` is on your PATH, test with:
pdflatex --help
Then create the latex build from the `doc` location:
sphinx-build -b latex src build/latex
Once done do:
cd build/latex
make
If there any warnings then hit return to pass through them to continue building ( also decide if you need to fix them or not ).
Now you should have Ghostscript.pdf ready within `build/latex`.
Move the Ghostscript.pdf file into the root of "doc" and replace the existing PDF as required.
Updating the documentation
--------------------------
- Make your edits as required in the relevant RST files ( see above: Editing the documentation )
- Test locally by building and running in local browser ( see above "Building HTML documentation" )
- Ensure to update the version of Ghostscript cited in `conf.py` line 52 ( e.g. release = "10.0.0" )
- Ensure that `News.html` reflects the latest release and has any further "news"
- Once changes are pushed to golden master then readthedocs.io should pick up the changes, build & deploy the docs!
- Visit ghostscript.readthedocs.io once built and deployed to check
---
For more see: Using Sphinx (https://www.sphinx-doc.org/en/master/usage/index.html)
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