Adding Sphinx documentation generation for the docs.

Signed-off-by: Tim 'mithro' Ansell <tansell@google.com>

11 files changed, 516 insertions, 3 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..96935f2
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,120 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+pip-wheel-metadata/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+.hypothesis/
+.pytest_cache/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+env/
+.python-version
+
+# celery beat schedule file
+celerybeat-schedule
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# Emacs temporary files
+*~
diff --git a/.readthedocs.yml b/.readthedocs.yml
new file mode 100644
index 0000000..93b8e44
--- /dev/null
+++ b/.readthedocs.yml
@@ -0,0 +1,16 @@
+# .readthedocs.yml
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Build documentation in the docs/ directory with Sphinx
+sphinx:
+  configuration: docs/conf.py
+
+formats:
+ - htmlzip
+
+conda:
+  environment: docs/environment.yml
diff --git a/docs/Makefile b/docs/Makefile
new file mode 100644
index 0000000..01ff6c0
--- /dev/null
+++ b/docs/Makefile
@@ -0,0 +1,65 @@
+# Copyright (C) 2017-2020  The SymbiFlow Authors.
+#
+# Use of this source code is governed by a ISC-style
+# license that can be found in the LICENSE file or at
+# https://opensource.org/licenses/ISC
+#
+# SPDX-License-Identifier: ISC
+# Minimal makefile for Sphinx documentation
+
+
+SHELL = /bin/bash
+MAKEDIR := $(dir $(lastword $(MAKEFILE_LIST)))
+
+# You can set these variables from the command line.
+SPHINXOPTS      =
+SPHINXBUILD     = [ -e env/bin/activate ] && source env/bin/activate; sphinx-build
+SPHINXAUTOBUILD = [ -e env/bin/activate ] && source env/bin/activate; sphinx-autobuild
+SPHINXPROJ      = SymbiFlowFIF
+SOURCEDIR       = .
+BUILDDIR        = _build
+OSFLAG          =
+UNAME_S := $(shell uname -s)
+ifneq (, $(findstring Linux, $(UNAME_S)))
+	OSFLAG := Linux
+endif
+ifeq ($(UNAME_S), Darwin)
+	OSFLAG := MacOSX
+endif
+ifneq (, $(findstring Cygwin, $(UNAME_S)))
+	OSFLAG := Linux
+endif
+ifneq (, $(findstring MINGW, $(UNAME_S)))
+	OSFLAG := Linux
+endif
+
+
+# Put it first so that "make" without argument is like "make help".
+help:
+	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+livehtml:
+	@$(SPHINXAUTOBUILD) -b html --ignore \*.swp --ignore \*~ $(SPHINXOPTS) "$(SOURCEDIR)" "$(BUILDDIR)/html"
+
+.PHONY: help livehtml Makefile
+
+
+env/Miniconda3-latest-$(OSFLAG)-x86_64.sh:
+	mkdir env
+	wget https://repo.anaconda.com/miniconda/Miniconda3-latest-$(OSFLAG)-x86_64.sh -O env/Miniconda3-latest-$(OSFLAG)-x86_64.sh
+	chmod a+x env/Miniconda3-latest-$(OSFLAG)-x86_64.sh
+
+env:
+	rm -rf env
+	make env/Miniconda3-latest-$(OSFLAG)-x86_64.sh
+	./env/Miniconda3-latest-$(OSFLAG)-x86_64.sh -p $(PWD)/env -b -f
+	source env/bin/activate; conda config --system --add envs_dirs $(PWD)/env/envs
+	source env/bin/activate; conda config --system --add pkgs_dirs $(PWD)/env/pkgs
+	source env/bin/activate; conda env update --name base --file ./environment.yml
+
+.PHONY: env
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
+%:
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
diff --git a/docs/_static/.keepme b/docs/_static/.keepme
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/docs/_static/.keepme
diff --git a/docs/bel_and_site_design.md b/docs/bel_and_site_design.md
index d7db3fb..266ec0e 100644
--- a/docs/bel_and_site_design.md
+++ b/docs/bel_and_site_design.md
@@ -1,4 +1,4 @@
-## Cell, BEL and Site Design
+# Cell, BEL and Site Design
 
 One of the key concepts within the FPGA interchange device resources is the
 relationship between the cell library and the device BEL and site definitions.
diff --git a/docs/conf.py b/docs/conf.py
new file mode 100644
index 0000000..5b1432c
--- /dev/null
+++ b/docs/conf.py
@@ -0,0 +1,268 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2017-2020  The SymbiFlow Authors.
+#
+# Use of this source code is governed by a ISC-style
+# license that can be found in the LICENSE file or at
+# https://opensource.org/licenses/ISC
+#
+# SPDX-License-Identifier: ISC
+
+# SymbiFlow V2X documentation build configuration file, created by
+# sphinx-quickstart on Mon Feb  5 11:04:37 2018.
+#
+# This file is execfile()d with the current directory set to its
+# containing dir.
+#
+# Note that not all possible configuration values are present in this
+# autogenerated file.
+#
+# All configuration values have a default; values that are commented out
+# serve to show the default.
+
+import re
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+#
+import os
+import sys
+sys.path.insert(0, os.path.abspath('.'))
+
+# -- General configuration ------------------------------------------------
+
+# If your documentation needs a minimal Sphinx version, state it here.
+#
+# needs_sphinx = '1.0'
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
+# ones.
+extensions = [
+    'sphinx.ext.autodoc',
+    'sphinx.ext.autosummary',
+    'sphinx.ext.doctest',
+    'sphinx.ext.imgmath',
+    'sphinx.ext.napoleon',
+    'sphinx.ext.todo',
+    'sphinx_markdown_tables',
+    'recommonmark',
+]
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ['_templates']
+
+# The suffix(es) of source filenames.
+# You can specify multiple suffix as a list of string:
+source_suffix = ['.rst', '.md']
+
+# The master toctree document.
+master_doc = 'index'
+
+# General information about the project.
+project = u'SymbiFlow FPGA Interchange Format'
+copyright = u'2021, SymbiFlow Team'
+author = u'SymbiFlow Team'
+
+# Enable github links when not on readthedocs
+on_rtd = os.environ.get('READTHEDOCS', None) == 'True'
+if not on_rtd:
+    html_context = {
+        "display_github": True,  # Integrate GitHub
+        "github_user": "symbiflow",  # Username
+        "github_repo": "fpga-interchange-schema",  # Repo name
+        "github_version": "master",  # Version
+        "conf_py_path": "/docs/",
+    }
+else:
+    docs_dir = os.path.abspath(os.path.dirname(__file__))
+    print("Docs dir is:", docs_dir)
+    import subprocess
+    subprocess.call('git fetch origin --unshallow', cwd=docs_dir, shell=True)
+    subprocess.check_call('git fetch origin --tags', cwd=docs_dir, shell=True)
+
+# The version info for the project you're documenting, acts as replacement for
+# |version| and |release|, also used in various other places throughout the
+# built documents.
+#
+# The full version, including alpha/beta/rc tags.
+release = re.sub('^v', '', os.popen('git describe').read().strip())
+# The short X.Y version.
+version = release
+
+# The language for content autogenerated by Sphinx. Refer to documentation
+# for a list of supported languages.
+#
+# This is also used if you do content translation via gettext catalogs.
+# Usually you set "language" from the command line for these cases.
+language = None
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+# This patterns also effect to html_static_path and html_extra_path
+exclude_patterns = ['_build', 'env', 'Thumbs.db', '.DS_Store']
+
+# The name of the Pygments (syntax highlighting) style to use.
+pygments_style = 'default'
+
+# If true, `todo` and `todoList` produce output, else they produce nothing.
+todo_include_todos = True
+
+# -- Options for HTML output ----------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+#
+html_theme = 'sphinx_symbiflow_theme'
+
+# Theme options are theme-specific and customize the look and feel of a theme
+# further.  For a list of options available for each theme, see the
+# documentation.
+#
+html_theme_options = {
+    # Specify a list of menu in Header.
+    # Tuples forms:
+    #  ('Name', 'external url or path of pages in the document',
+    #   boolean, 'icon name')
+    #
+    # Third argument:
+    # True indicates an external link.
+    # False indicates path of pages in the document.
+    #
+    # Fourth argument:
+    # Specify the icon name.
+    # For details see link.
+    # https://material.io/icons/
+    'header_links': [
+        ('Home', 'index', False, 'home'),
+        ("GitHub",
+         "https://github.com/SymbiFlow/fpga-interchange-schema",
+         True,
+         'link'),
+    ],
+
+    # Customize css colors.
+    # For details see link.
+    # https://getmdl.io/customize/index.html
+    #
+    # Values: amber, blue, brown, cyan deep_orange, deep_purple, green, grey,
+    #         indigo, light_blue, light_green, lime, orange, pink, purple, red,
+    #         teal, yellow
+    # (Default: indigo)
+    'primary_color': 'deep_purple',
+    # Values: Same as primary_color. (Default: pink)
+    'accent_color': 'purple',
+
+    # Customize layout.
+    # For details see link.
+    # https://getmdl.io/components/index.html#layout-section
+    'fixed_drawer': True,
+    'fixed_header': True,
+    'header_waterfall': True,
+    'header_scroll': False,
+
+    # Render title in header.
+    # Values: True, False (Default: False)
+    'show_header_title': False,
+    # Render title in drawer.
+    # Values: True, False (Default: True)
+    'show_drawer_title': True,
+    # Render footer.
+    # Values: True, False (Default: True)
+    'show_footer': True
+}
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+html_static_path = ['_static']
+
+# Custom sidebar templates, must be a dictionary that maps document names
+# to template names.
+#
+# This is required for the alabaster theme
+# refs: http://alabaster.readthedocs.io/en/latest/installation.html#sidebars
+html_sidebars = {
+    '**': [
+        'relations.html',  # needs 'show_related': True theme option to display
+        'searchbox.html',
+    ]
+}
+
+# -- Options for HTMLHelp output ------------------------------------------
+
+# Output file base name for HTML help builder.
+htmlhelp_basename = 'fpga-interchange-schema'
+
+# -- Options for LaTeX output ---------------------------------------------
+
+latex_elements = {
+    # The paper size ('letterpaper' or 'a4paper').
+    #
+    # 'papersize': 'letterpaper',
+
+    # The font size ('10pt', '11pt' or '12pt').
+    #
+    # 'pointsize': '10pt',
+
+    # Additional stuff for the LaTeX preamble.
+    #
+    # 'preamble': '',
+
+    # Latex figure (float) alignment
+    #
+    # 'figure_align': 'htbp',
+}
+
+# Grouping the document tree into LaTeX files. List of tuples
+# (source start file, target name, title,
+#  author, documentclass [howto, manual, or own class]).
+latex_documents = [
+    (
+        master_doc,
+        'fpga-interchange-schema.tex',
+        u'SymbiFlow FPGA Interchange Format Documentation',
+        u'SymbiFlow Team',
+        'manual',
+    ),
+]
+
+# -- Options for manual page output ---------------------------------------
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [
+    (
+        master_doc,
+        'fpga-interchange-schema',
+        u'SymbiFlow FPGA Interchange Format Documentation',
+        [author],
+        1,
+    ),
+]
+
+# -- Options for Texinfo output -------------------------------------------
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+#  dir menu entry, description, category)
+texinfo_documents = [
+    (
+        master_doc,
+        'SymbiFlowFIFM',
+        u'SymbiFlow FPGA Interchange Format Documentation',
+        author,
+        'SymbiFlowFIF',
+        'One line description of project.',
+        'Miscellaneous',
+    ),
+]
+
+# Example configuration for intersphinx: refer to the Python standard library.
+intersphinx_mapping = {'https://docs.python.org/': None}
+
+
+def setup(app):
+    pass
diff --git a/docs/device_resources.md b/docs/device_resources.md
index 8e42c44..a2671c5 100644
--- a/docs/device_resources.md
+++ b/docs/device_resources.md
@@ -1,4 +1,4 @@
-## Device Resources
+# Device Resources
 
 The device resources schema is intended to be a complete description of an
 island-based FPGA design.  It is made of many components, but the core
diff --git a/docs/environment.yml b/docs/environment.yml
new file mode 100644
index 0000000..4b74234
--- /dev/null
+++ b/docs/environment.yml
@@ -0,0 +1,16 @@
+name: fpga-interchange-schema-docs
+channels:
+- SymbiFlow
+- conda-forge
+- defaults
+dependencies:
+- python=3.7
+- pip
+# ReadTheDoc dependencies
+- mock
+- pillow
+- sphinx
+- sphinx_rtd_theme
+# Packages installed from PyPI
+- pip:
+  - -r file:requirements.txt
diff --git a/docs/index.rst b/docs/index.rst
new file mode 100644
index 0000000..d8dc21e
--- /dev/null
+++ b/docs/index.rst
@@ -0,0 +1,18 @@
+Welcome to FPGA Interchange documentation!
+==========================================
+
+.. toctree::
+   :maxdepth: 2
+   :caption: Contents:
+
+   device_resources
+   bel_and_site_design
+   pseudo_cells
+
+
+Indices and tables
+==================
+
+* :ref:`genindex`
+* :ref:`modindex`
+* :ref:`search`
diff --git a/docs/pseudo_cells.md b/docs/pseudo_cells.md
index a55fc44..65b55d9 100644
--- a/docs/pseudo_cells.md
+++ b/docs/pseudo_cells.md
@@ -1,4 +1,4 @@
-## Pseudo Cells
+# Pseudo Cells
 
 Pseudo PIPs and site pseudo PIPs are edges in the device graph that route
 through other sites and/or BELs.  Pseudo cells are the expression of what
diff --git a/docs/requirements.txt b/docs/requirements.txt
new file mode 100644
index 0000000..b83d251
--- /dev/null
+++ b/docs/requirements.txt
@@ -0,0 +1,10 @@
+git+https://github.com/SymbiFlow/sphinx_symbiflow_theme.git#egg=sphinx_symbiflow_theme
+
+docutils
+sphinx
+sphinx-autobuild
+
+breathe
+recommonmark
+sphinx-markdown-tables
+sphinxcontrib-napoleon