docs: setup docs for C code (#23262)

* add breathe and doxygen

* add sphinx-breathe c docs generation
* add c docs to site

* built in docker

* build base image first

* namespace cleanup

* Revert "build base image first"

This reverts commit 4c44c02ffb.

* its in the dockerfile

Co-authored-by: Willem Melching <willem.melching@gmail.com>
old-commit-hash: 9f70bea964

Pipfile

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:41a4d986dd7b786f56c8b76a84b897e394b390647272153c20db1ad3f1db531c
+oid sha256:4a3baa202ee29371a3168613072d612a3239f368c0e9122a31b398f7db0eb7b6
-size 1268
+size 1282

Pipfile.lock

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:cffe2ec3c20be1cef17765fd41ddd7e72a3bc6375599b7df2978e652b2f6d1d2
+oid sha256:5aa6aaa2866c3bf2002532ac131e4dce9581adc1e8d3422dc37bba163e5fc874
-size 143747
+size 143236

docs/c_docs.rst

@@ -0,0 +1,105 @@
+openpilot
+==========
+
+
+opendbc
+------
+.. autodoxygenindex::
+   :project: opendbc_can
+
+
+cereal
+------
+
+messaging
+^^^^^^^^^
+.. autodoxygenindex::
+   :project: cereal_messaging
+
+visionipc
+^^^^^^^^^
+.. autodoxygenindex::
+   :project: cereal_visionipc
+
+
+selfdrive
+---------
+
+camerad
+^^^^^^^
+.. autodoxygenindex::
+   :project: selfdrive_camerad_cameras
+.. autodoxygenindex::
+   :project: selfdrive_camerad_transforms
+.. autodoxygenindex::
+   :project: selfdrive_camerad_imgproc
+
+locationd
+^^^^^^^^^
+.. autodoxygenindex::
+   :project: selfdrive_locationd
+
+ui
+^^
+
+.. autodoxygenindex::
+   :project: selfdrive_ui
+
+soundd
+""""""
+.. autodoxygenindex::
+   :project: selfdrive_ui_soundd
+
+navd
+""""
+.. autodoxygenindex::
+   :project: selfdrive_ui_navd
+
+replay
+""""""
+.. autodoxygenindex::
+   :project: selfdrive_ui_replay
+
+qt
+""
+.. autodoxygenindex::
+   :project: selfdrive_ui_qt_offroad
+.. autodoxygenindex::
+   :project: selfdrive_ui_qt_maps
+
+proclogd
+^^^^^^^^
+.. autodoxygenindex::
+   :project: selfdrive_proclogd
+
+modeld
+^^^^^^
+.. autodoxygenindex::
+   :project: selfdrive_modeld_transforms
+.. autodoxygenindex::
+   :project: selfdrive_modeld_models
+.. autodoxygenindex::
+   :project: selfdrive_modeld_thneed
+.. autodoxygenindex::
+   :project: selfdrive_modeld_runners
+
+common
+^^^^^^
+.. autodoxygenindex::
+   :project: selfdrive_common
+
+sensorsd
+^^^^^^^^
+.. autodoxygenindex::
+   :project: selfdrive_sensord_sensors
+
+boardd
+^^^^^^
+.. autodoxygenindex::
+   :project: selfdrive_boardd
+
+
+rednose
+-------
+.. autodoxygenindex::
+   :project: rednose_repo_rednose_helpers

docs/conf.py

@@ -14,10 +14,13 @@
 # documentation root, use os.path.abspath to make it absolute, like shown here.
 #
 import os
+from os.path import exists
 import sys
 from selfdrive.version import get_version
+from common.basedir import BASEDIR
 sys.path.insert(0, os.path.abspath('.'))
 sys.path.insert(0, os.path.abspath('..'))
+
 VERSION = get_version()
 
 
@@ -41,6 +44,7 @@ extensions = [
   'sphinx.ext.viewcode',  # Add view code link to modules
   'sphinx_rtd_theme',     # Read The Docs theme
   'myst_parser',          # Markdown parsing
+  'breathe',              # Doxygen C/C++ integration
   'sphinx_sitemap',       # sitemap generation for SEO
 ]
 
@@ -78,6 +82,47 @@ templates_path = ['_templates']
 exclude_patterns = []
 
 
+# -- c docs configuration ---------------------------------------------------
+
+# Breathe Configuration
+# breathe_default_project = "c_docs"
+breathe_build_directory = f"{BASEDIR}/build/docs/html/xml"
+breathe_separate_member_pages = True
+breathe_default_members = ('members', 'private-members', 'undoc-members')
+breathe_domain_by_extension = {
+  "h": "cc",
+}
+breathe_implementation_filename_extensions = ['.c', '.cc']
+breathe_doxygen_config_options = {}
+breathe_projects_source = {}
+
+# only document files that have accompanying .cc files next to them
+print("searching for c_docs...")
+for root, dirs, files in os.walk(BASEDIR):
+  found = False
+  breath_src = {}
+  breathe_srcs_list = []
+
+  for file in files:
+    ccFile = os.path.join(root, file)[:-2] + ".cc"
+
+    if file.endswith(".h") and exists(ccFile):
+      f = os.path.join(root, file)
+
+      parent_dir_abs = os.path.dirname(f)
+      parent_dir = parent_dir_abs[len(BASEDIR) + 1:]
+      project = parent_dir.replace('/', '_')
+      print(f"\tFOUND: {f} in {project}")
+
+      breathe_srcs_list.append(file)
+      found = True
+
+    if found:
+      breath_src[project] = (parent_dir_abs, breathe_srcs_list)
+      breathe_projects_source.update(breath_src)
+
+print(f"breathe_projects_source: {breathe_projects_source.keys()}")
+
 # -- Options for HTML output -------------------------------------------------
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for

docs/docker/Dockerfile

@@ -34,6 +34,7 @@ COPY ./*.md ${OPENPILOT_PATH}/
 
 RUN scons -j$(nproc)
 
+RUN apt update && apt install doxygen -y
 COPY ./docs ${OPENPILOT_PATH}/docs
 RUN git init .
 WORKDIR ${OPENPILOT_PATH}/docs

docs/index.md

@@ -28,8 +28,15 @@ overview.rst
 - {ref}`search`
 
 ```{toctree}
-:caption: 'Modules'
+:caption: 'Python API'
 :maxdepth: 2
 
 modules.rst
 ```
+
+```{toctree}
+:caption: 'C/C++ API'
+:maxdepth: 4
+
+c_docs.rst
+```