esp-idf/docs/idf_extensions/build_system/__init__.py

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# Sphinx extension to integrate IDF build system information
# into the Sphinx Build
#
# Runs early in the Sphinx process, runs CMake to generate the dummy IDF project
# in this directory - including resolving paths, etc.
#
# Then emits the new 'idf-info' event which has information read from IDF
# build system, that other extensions can use to generate relevant data.
import os.path
import shutil
import sys
import subprocess
import json
# this directory also contains the dummy IDF project
project_path = os.path.abspath(os.path.dirname(__file__))
def setup(app):
# Setup some common paths
try:
build_dir = os.environ["BUILDDIR"] # TODO see if we can remove this
except KeyError:
build_dir = os.path.dirname(app.doctreedir.rstrip(os.sep))
try:
os.mkdir(build_dir)
except OSError:
pass
try:
os.mkdir(os.path.join(build_dir, 'inc'))
except OSError:
pass
# Fill in a default IDF_PATH if it's missing (ie when Read The Docs is building the docs)
try:
idf_path = os.environ['IDF_PATH']
except KeyError:
idf_path = os.path.realpath(os.path.join(os.path.dirname(__file__), '..'))
app.add_config_value('docs_root', os.path.join(idf_path, "docs"), 'env')
app.add_config_value('idf_path', idf_path, 'env')
app.add_config_value('build_dir', build_dir, 'env') # not actually an IDF thing
app.add_event('idf-info')
# we want this to run early in the docs build but unclear exactly when
app.connect('config-inited', generate_idf_info)
return {'parallel_read_safe': True, 'parallel_write_safe': True, 'version': '0.1'}
def generate_idf_info(app, config):
print("Running CMake on dummy project to get build info...")
build_dir = os.path.dirname(app.doctreedir.rstrip(os.sep))
cmake_build_dir = os.path.join(build_dir, "build_dummy_project")
idf_py_path = os.path.join(app.config.idf_path, "tools", "idf.py")
print("Running idf.py...")
idf_py = [sys.executable,
idf_py_path,
"-B",
cmake_build_dir,
"-C",
project_path,
"-D",
"SDKCONFIG={}".format(os.path.join(build_dir, "dummy_project_sdkconfig"))
]
# force a clean idf.py build w/ new sdkconfig each time
# (not much slower than 'reconfigure', avoids any potential config & build versioning problems
shutil.rmtree(cmake_build_dir, ignore_errors=True)
print("Starting new dummy IDF project... ")
subprocess.check_call(idf_py + ["set-target", app.config.idf_target])
print("Running CMake on dummy project...")
subprocess.check_call(idf_py + ["reconfigure"])
with open(os.path.join(cmake_build_dir, "project_description.json")) as f:
project_description = json.load(f)
if project_description["target"] != app.config.idf_target:
# this shouldn't really happen unless someone has been moving around directories inside _build, as
# the cmake_build_dir path should be target-specific
raise RuntimeError(("Error configuring the dummy IDF project for {}. " +
"Target in project description is {}. " +
"Is build directory contents corrupt?")
.format(app.config.idf_target, project_description["target"]))
app.emit('idf-info', project_description)
return []