docs: Adding initial Sphinx doc structure.

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

docs/Makefile

@@ -0,0 +1,62 @@
+# Minimal makefile for Sphinx documentation
+
+DOCSDIR := $(dir $(lastword $(MAKEFILE_LIST)))
+TOPDIR := $(realpath $(DOCSDIR)/..)
+
+include $(TOPDIR)/scripts/make/conda.mk
+
+SHELL = /bin/bash
+
+EXP_OPEN := $$((
+EXP_CLOSE := ))
+CPU_CORES := $(shell nproc)
+CPU_CORES_2 := $(shell echo $(EXP_OPEN) $(CPU_CORES) * 2 $(EXP_CLOSE))
+
+SPHINXOPTS      = -j $(CPU_CORES_2)
+SPHINXBUILD     = $(IN_CONDA_ENV) sphinx-build
+SPHINXAUTOBUILD = $(IN_CONDA_ENV) sphinx-autobuild
+SPHINXPROJ      = SkyWaterPDK
+SOURCEDIR       = $(DOCSDIR)
+BUILDDIR        = $(DOCSDIR)/_build
+
+# Put it first so that "make" without argument is like "make help".
+help: | $(CONDA_ENV_PYTHON)
+	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+# Vim makes a '4913' file for file system checking. Seriously.
+livehtml: | $(CONDA_ENV_PYTHON)
+	@$(SPHINXAUTOBUILD) \
+		-b html \
+		--delay 5 \
+		\
+		--ignore \*.swp \
+		--ignore \*~ \
+		--ignore env \
+		--ignore _build \
+        	--ignore .git \
+        	--ignore */4913 \
+		\
+		$(SPHINXOPTS) \
+		"$(SOURCEDIR)" \
+		"$(BUILDDIR)/html"
+
+.PHONY: help livehtml Makefile
+
+# Various automated fixups that can be run
+fixup:
+	# Make sure it is SkyWater
+	find ../ -type f -name \*.rst -exec sed -i 's/Skywater/SkyWater/gi' \{\} \+
+	# Strip trailing space
+	find ../ -type f -name \*.rst -exec sed -i 's/ \+$$//' \{\} \+
+	# Make sure all library names have the :lib: role.
+	find ../ -type f -name \*.rst -exec sed -i -e'/:name:.*/!s/\(:lib:\)\?`\?\(sky130_[a-z0-9]\+_[a-z0-9]\+\(_[a-z0-9]\+\)\?\)`\?\(\s\|$$\)/:lib:`\2`\4/g' \{\} \+
+
+.PHONY: fixup
+
+echo: | $(CONDA_ENV_PYTHON)
+	@echo '$(SPHINXBUILD) -M XXXX "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)'
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
+.DEFAULT: | $(CONDA_ENV_PYTHON)
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)

docs/conf.py

@@ -0,0 +1,326 @@
+# -*- coding: utf-8 -*-
+#
+# Configuration file for the Sphinx documentation builder.
+#
+# This file does only contain a selection of the most common options. For a
+# full list see the documentation:
+# http://www.sphinx-doc.org/en/master/config
+
+# -- Path setup --------------------------------------------------------------
+
+# 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 docutils
+import os
+import re
+# import sys
+# sys.path.insert(0, os.path.abspath('.'))
+
+
+# -- Project information -----------------------------------------------------
+
+project = 'Skywater SKY130 PDK'
+copyright = '2020, Skywater PDK Authors'
+author = 'Skywater PDK Authors'
+
+# The short X.Y version
+version = ''
+# The full version, including alpha/beta/rc tags
+release = ''
+
+
+# -- 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.todo',
+    'sphinx.ext.mathjax',
+    'sphinx.ext.ifconfig',
+    'sphinx.ext.githubpages',
+    'sphinxcontrib_verilog_diagrams',
+]
+
+# 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']
+source_suffix = '.rst'
+
+# The master toctree document.
+master_doc = 'index'
+
+# 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": "mithro",  # Username
+        "github_repo": "python-sphinx-verilog",  # Repo name
+        "github_version": "master",  # Version
+        "conf_py_path": "/doc/",
+    }
+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 pattern also affects 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 = None
+
+
+# -- 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/google/skywater-pdk", True, 'link'),
+        ("SkyWater", "https://www.skywatertechnology.com/", 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':
+    'light_green',
+    # Values: Same as primary_color. (Default: pink)
+    'accent_color':
+    'teal',
+
+    # 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.
+#
+# The default sidebars (for documents that don't match any pattern) are
+# defined by theme itself.  Builtin themes are using these templates by
+# default: ``['localtoc.html', 'relations.html', 'sourcelink.html',
+# 'searchbox.html']``.
+#
+
+# -- Options for HTMLHelp output ---------------------------------------------
+
+# Output file base name for HTML help builder.
+htmlhelp_basename = 'SkywaterSKY130PDKdoc'
+
+
+# -- 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, 'SkywaterSKY130PDK.tex', 'Skywater SKY130 PDK Documentation',
+     'Skywater PDK Authors', '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, 'skywaters8pdk', 'Skywater SKY130 PDK 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, 'SkywaterSKY130PDK', 'Skywater SKY130 PDK Documentation',
+     author, 'SkywaterSKY130PDK', 'One line description of project.',
+     'Miscellaneous'),
+]
+
+
+# -- Options for Epub output -------------------------------------------------
+
+# Bibliographic Dublin Core info.
+epub_title = project
+
+# The unique identifier of the text. This can be a ISBN number
+# or the project homepage.
+#
+# epub_identifier = ''
+
+# A unique identification for the text.
+#
+# epub_uid = ''
+
+# A list of files that should not be packed into the epub file.
+epub_exclude_files = ['search.html']
+
+
+# -- Extension configuration -------------------------------------------------
+
+# -- Options for todo extension ----------------------------------------------
+
+# If true, `todo` and `todoList` produce output, else they produce nothing.
+todo_include_todos = True
+
+
+import re
+from docutils.parsers.rst import directives, roles, nodes
+
+
+LIB_REGEX = re.compile('sky130_(?P<lib_src>[^_\s]*)_(?P<lib_type>[^_\s]*)(_(?P<lib_name>[^_\s]*))?')
+
+def lib_role(name, rawtext, text, lineno, inliner, options={}, content=[]):
+    """Library name which gets colorized."""
+    m = LIB_REGEX.match(text)
+    if not m:
+        msg = inliner.reporter.error("Malformed library name of "+repr(text), line=lineno)
+        prb = inliner.problematic(rawtext, rawtext, msg)
+        return [prb], [msg]
+    app = inliner.document.settings.env.app
+
+    #lib_process_role = roles.role('lib_src', inliner.language, lineno, inliner.reporter)
+    #lib_src_role = roles.role('lib_src', inliner.language, lineno, inliner.reporter)
+    #lib_type_role = roles.role('lib_src', inliner.language, lineno, inliner.reporter)
+    #lib_name_role = roles.role('lib_src', inliner.language, lineno, inliner.reporter)
+    lib_process = 'sky130'
+    lib_src = m.group('lib_src')
+    lib_type = m.group('lib_type')
+    lib_name = m.group('lib_name')
+
+    r = [
+        nodes.inline(lib_process, lib_process, classes=['lib-process']),
+        nodes.inline('_', '_', options=options),
+        nodes.inline(lib_src, lib_src, classes=['lib-src']),
+        nodes.inline('_', '_', options=options),
+        nodes.inline(lib_type, lib_type, classes=['lib-type']),
+    ]
+    if lib_name:
+        r.append(nodes.inline('_', '_', options=options))
+        r.append(nodes.inline(lib_name, lib_name, classes=['lib-name']))
+
+    return r, []
+
+
+def add_role(app, new_role_name):
+    options = {
+        'class': directives.class_option(new_role_name),
+    }
+    role = roles.CustomRole(new_role_name, roles.generic_custom_role, options, "")
+    app.add_role(new_role_name, role)
+
+
+def setup(app):
+    app.add_css_file('extra.css')
+    add_role(app, 'lib_process')
+    add_role(app, 'lib_src')
+    add_role(app, 'lib_type')
+    add_role(app, 'lib_name')
+    add_role(app, 'drc_rule')
+    add_role(app, 'drc_tag')
+    add_role(app, 'drc_flag')
+    add_role(app, 'layer')
+    app.add_role('lib', lib_role)

docs/fixup-headers.py

@@ -0,0 +1,69 @@
+#!/usr/bin/env python3
+# Copyright 2020 SkyWater PDK Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+
+import os.path
+import sys
+import tempfile
+from collections import defaultdict
+
+
+def count_chars(l):
+    o = defaultdict(lambda: 0)
+    for i in l:
+        o[i] += 1
+    if '\n' in o:
+        del o['\n']
+    return dict(o)
+
+
+def main(argv):
+    assert len(argv) == 1, argv
+
+    fname = argv[0]
+    assert fname.endswith('.rst'), fname
+    assert os.path.exists(fname), fname
+
+    output = ['',]
+    with open(fname) as f:
+        for l in f:
+            output.append(l)
+            c = count_chars(l)
+            if len(c) != 1:
+                continue
+
+            header = list(c.keys())[0]
+            if header not in ['-', '=', '+', '~']:
+                print("Possible header?", repr(l))
+                continue
+
+            lastline = output[-2]
+
+            if len(lastline) <= 4:
+                continue
+
+            oheader = (header * (len(lastline)-1))+'\n'
+            output[-1] = oheader
+
+    with open(fname, 'w') as f:
+        f.write("".join(output[1:]))
+
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main(sys.argv[1:]))

docs/index.rst

@@ -0,0 +1,22 @@
+Welcome to SkyWater SKY130 PDK's documentation!
+===============================================
+
+TODO: Put documentation here.
+
+.. toctree::
+    :hidden:
+
+    contributing
+    code-of-conduct
+
+    known_issues
+    versioning
+    status
+
+
+Indices and tables
+==================
+
+* :ref:`genindex`
+* :ref:`modindex`
+* :ref:`search`

docs/requirements.txt

@@ -0,0 +1,18 @@
+git+https://github.com/SymbiFlow/sphinx_materialdesign_theme.git#egg=sphinx-symbiflow-theme
+
+docutils
+sphinx
+sphinx-autobuild
+
+# Verilog diagrams using Yosys + netlistsvg
+git+https://github.com/SymbiFlow/sphinxcontrib-verilog-diagrams.git#egg=sphinxcontrib-verilog-diagrams
+
+# Module diagrams
+symbolator
+
+# pycairo
+# vext.gi
+
+restructuredtext-lint
+
+tabulate

environment.yml

@@ -14,9 +14,16 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 name: skywater-pdk-scripts
+channels:
+- symbiflow
+- conda-forge
+- defaults
 dependencies:
 - python
 - pip
+- yosys
+- netlistsvg
 # Packages installed from PyPI
 - pip:
   - -r file:requirements.txt
+  - -r file:docs/requirements.txt

scripts/make/conda.mk

@@ -14,6 +14,7 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
+
 SHELL := /bin/bash
 
 UNAME_S := $(shell uname -s)
@@ -30,7 +31,8 @@ ifneq (, $(findstring MINGW, $(UNAME_S)))
         OSFLAG := Linux
 endif
 
-TOP_DIR	          := $(shell git rev-parse --show-toplevel)
+MAKE_DIR          := $(dir $(lastword $(MAKEFILE_LIST)))
+TOP_DIR           := $(realpath $(MAKE_DIR)/../..)
 ENV_DIR           := $(TOP_DIR)/env
 REQUIREMENTS_FILE := $(TOP_DIR)/requirements.txt
 ENVIRONMENT_FILE  := $(TOP_DIR)/environment.yml
@@ -60,12 +62,14 @@ $(CONDA_PKGS_DEP): $(CONDA_PYTHON)
 
 $(CONDA_PYTHON): $(DOWNLOADS_DIR)/Miniconda3-latest-$(OSFLAG)-x86_64.sh
 	$(DOWNLOADS_DIR)/Miniconda3-latest-$(OSFLAG)-x86_64.sh -p $(CONDA_DIR) -b -f
+	touch $(CONDA_PYTHON)
 
 $(CONDA_DIR)/envs: $(CONDA_PYTHON)
 	$(IN_CONDA_ENV_BASE) conda config --system --add envs_dirs $(CONDA_DIR)/envs
 
 $(CONDA_ENV_PYTHON): $(ENVIRONMENT_FILE) $(REQUIREMENTS_FILE) | $(CONDA_PYTHON) $(CONDA_DIR)/envs $(CONDA_PKGS_DEP)
 	$(IN_CONDA_ENV_BASE) conda env update --name $(CONDA_ENV_NAME) --file $(ENVIRONMENT_FILE)
+	touch $(CONDA_ENV_PYTHON)
 
 env: $(CONDA_ENV_PYTHON)
 	$(IN_CONDA_ENV) conda info
@@ -86,3 +90,25 @@ dist-clean:
 	rm -rf conda
 
 .PHONY: dist-clean
+
+
+FILTER_TOP = sed -e's@$(TOP_DIR)/@$$TOP_DIR/@'
+env-info:
+	@echo "             Top level directory is: '$(TOP_DIR)'"
+	@echo "              The version number is: '$$(git describe)'"
+	@echo "            Git repository is using: $$(du -h -s $(TOP_DIR)/.git | sed -e's/\s.*//')" \
+		| $(FILTER_TOP)
+	@echo
+	@echo "     Environment setup directory is: '$(ENV_DIR)'" \
+		| $(FILTER_TOP)
+	@echo "    Download and cache directory is: '$(DOWNLOADS_DIR)' (using $$(du -h -s $(DOWNLOADS_DIR) | sed -e's/\s.*//'))" \
+		| $(FILTER_TOP)
+	@echo "               Conda's directory is: '$(CONDA_DIR)' (using $$(du -h -s $(CONDA_DIR) | sed -e's/\s.*//'))" \
+		| $(FILTER_TOP)
+	@echo " Conda's packages download cache is: '$(CONDA_PKGS_DIR)' (using $$(du -h -s $(CONDA_PKGS_DIR) | sed -e's/\s.*//'))" \
+		| $(FILTER_TOP)
+	@echo "           Conda's Python binary is: '$(CONDA_ENV_PYTHON)'"\
+		| $(FILTER_TOP)
+
+
+.PHONY: info