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+# 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):
+ # allow subpaths of absdir (i.e. docdir = <absdir>/sub/path/)
+ if docdir.startswith(absdir):
+ key = os.path.join(key, docdir.split(f"{key}/")[-1])
+ else:
+ 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."""
+
+ NO_AUTODOC = False
+
+ 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."""
+ if self.NO_AUTODOC:
+ logger.info("Python/JS API documentation generation will be skipped")
+ app.config["extensions"].remove("sphinx.ext.autodoc")
+ app.config["extensions"].remove("sphinx_js")
+ 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)
+
+ if not self.NO_AUTODOC:
+ 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)
+
+ # In the case of livereload, we don't want to delete unmodified (unaccounted) files.
+ copier.copy(
+ self.staging_dir, remove_empty_directories=False, remove_unaccounted=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)