# This Source Code Form is subject to the terms of the Mozilla Public # License, v. 2.0. If a copy of the MPL was not distributed with this # file, # You can obtain one at http://mozilla.org/MPL/2.0/. import os import tempfile from pathlib import PurePath import frontmatter import sphinx import sphinx.ext.apidoc import yaml from mozbuild.base import MozbuildObject from mozbuild.frontend.reader import BuildReader from mozbuild.util import memoize from mozpack.copier import FileCopier from mozpack.files import FileFinder from mozpack.manifests import InstallManifest here = os.path.abspath(os.path.dirname(__file__)) build = MozbuildObject.from_environment(cwd=here) MAIN_DOC_PATH = os.path.normpath(os.path.join(build.topsrcdir, "docs")) logger = sphinx.util.logging.getLogger(__name__) @memoize def read_build_config(docdir): """Read the active build config and return the relevant doc paths. The return value is cached so re-generating with the same docdir won't invoke the build system a second time.""" trees = {} python_package_dirs = set() is_main = docdir == MAIN_DOC_PATH relevant_mozbuild_path = None if is_main else docdir # Reading the Sphinx variables doesn't require a full build context. # Only define the parts we need. class fakeconfig(object): topsrcdir = build.topsrcdir variables = ("SPHINX_TREES", "SPHINX_PYTHON_PACKAGE_DIRS") reader = BuildReader(fakeconfig()) result = reader.find_variables_from_ast(variables, path=relevant_mozbuild_path) for path, name, key, value in result: reldir = os.path.dirname(path) if name == "SPHINX_TREES": # If we're building a subtree, only process that specific subtree. # topsrcdir always uses POSIX-style path, normalize it for proper comparison. absdir = os.path.normpath(os.path.join(build.topsrcdir, reldir, value)) if not is_main and absdir not in (docdir, MAIN_DOC_PATH): continue assert key if key.startswith("/"): key = key[1:] else: key = os.path.normpath(os.path.join(reldir, key)) if key in trees: raise Exception( "%s has already been registered as a destination." % key ) trees[key] = os.path.join(reldir, value) if name == "SPHINX_PYTHON_PACKAGE_DIRS": python_package_dirs.add(os.path.join(reldir, value)) return trees, python_package_dirs class _SphinxManager(object): """Manages the generation of Sphinx documentation for the tree.""" def __init__(self, topsrcdir, main_path): self.topsrcdir = topsrcdir self.conf_py_path = os.path.join(main_path, "conf.py") self.index_path = os.path.join(main_path, "index.rst") # Instance variables that get set in self.generate_docs() self.staging_dir = None self.trees = None self.python_package_dirs = None def generate_docs(self, app): """Generate/stage documentation.""" self.staging_dir = os.path.join(app.outdir, "_staging") logger.info("Reading Sphinx metadata from build configuration") self.trees, self.python_package_dirs = read_build_config(app.srcdir) logger.info("Staging static documentation") self._synchronize_docs(app) logger.info("Generating Python API documentation") self._generate_python_api_docs() def _generate_python_api_docs(self): """Generate Python API doc files.""" out_dir = os.path.join(self.staging_dir, "python") base_args = ["--no-toc", "-o", out_dir] for p in sorted(self.python_package_dirs): full = os.path.join(self.topsrcdir, p) finder = FileFinder(full) dirs = {os.path.dirname(f[0]) for f in finder.find("**")} test_dirs = {"test", "tests"} excludes = {d for d in dirs if set(PurePath(d).parts) & test_dirs} args = list(base_args) args.append(full) args.extend(excludes) sphinx.ext.apidoc.main(argv=args) def _process_markdown(self, m, markdown_file, dest): """ When dealing with a markdown file, we check if we have a front matter. If this is the case, we read the information, create a temporary file, reuse the front matter info into the md file """ with open(markdown_file, "r", encoding="utf_8") as f: # Load the front matter header post = frontmatter.load(f) if len(post.keys()) > 0: # Has a front matter, use it with tempfile.NamedTemporaryFile("w", delete=False) as fh: # Use the frontmatter title fh.write(post["title"] + "\n") # Add the md syntax for the title fh.write("=" * len(post["title"]) + "\n") # If there is a summary, add it if "summary" in post: fh.write(post["summary"] + "\n") # Write the content fh.write(post.__str__()) fh.close() # Instead of a symlink, we copy the file m.add_copy(fh.name, dest) else: # No front matter, create the symlink like for rst # as it will be the the same file m.add_link(markdown_file, dest) def _synchronize_docs(self, app): m = InstallManifest() with open(os.path.join(MAIN_DOC_PATH, "config.yml"), "r") as fh: tree_config = yaml.safe_load(fh)["categories"] m.add_link(self.conf_py_path, "conf.py") for dest, source in sorted(self.trees.items()): source_dir = os.path.join(self.topsrcdir, source) for root, _, files in os.walk(source_dir): for f in files: source_path = os.path.normpath(os.path.join(root, f)) rel_source = source_path[len(source_dir) + 1 :] target = os.path.normpath(os.path.join(dest, rel_source)) if source_path.endswith(".md"): self._process_markdown( m, source_path, os.path.join(".", target) ) else: m.add_link(source_path, target) copier = FileCopier() m.populate_registry(copier) copier.copy(self.staging_dir, remove_empty_directories=False) with open(self.index_path, "r") as fh: data = fh.read() def is_toplevel(key): """Whether the tree is nested under the toplevel index, or is nested under another tree's index. """ for k in self.trees: if k == key: continue if key.startswith(k): return False return True def format_paths(paths): source_doc = ["%s/index" % p for p in paths] return "\n ".join(source_doc) toplevel_trees = {k: v for k, v in self.trees.items() if is_toplevel(k)} CATEGORIES = {} # generate the datastructure to deal with the tree for t in tree_config: CATEGORIES[t] = format_paths(tree_config[t]) # During livereload, we don't correctly rebuild the full document # tree (Bug 1557020). The page is no longer referenced within the index # tree, thus we shall check categorisation only if complete tree is being rebuilt. if app.srcdir == self.topsrcdir: indexes = set( [ os.path.normpath(os.path.join(p, "index")) for p in toplevel_trees.keys() ] ) # Format categories like indexes cats = "\n".join(CATEGORIES.values()).split("\n") # Remove heading spaces cats = [os.path.normpath(x.strip()) for x in cats] indexes = tuple(set(indexes) - set(cats)) if indexes: # In case a new doc isn't categorized print(indexes) raise Exception( "Uncategorized documentation. Please add it in docs/config.yml" ) data = data.format(**CATEGORIES) with open(os.path.join(self.staging_dir, "index.rst"), "w") as fh: fh.write(data) manager = _SphinxManager(build.topsrcdir, MAIN_DOC_PATH)