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plugin-events.py
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plugin-events.py
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# Run this to re-generate 'plugin-events.svg'.
# Requires `pip install graphviz`.
import contextlib
import pathlib
import re
from graphviz import Digraph
graph = Digraph("MkDocs", format="svg")
graph.attr(compound="true", bgcolor="transparent")
graph.graph_attr.update(fontname="inherit", tooltip=" ")
graph.node_attr.update(fontname="inherit", tooltip=" ", style="filled")
graph.edge_attr.update(fontname="inherit", tooltip=" ")
def strip_suffix(name):
return re.sub(r"_.$", "", name)
subgraph_to_first_node = {}
subgraph_to_last_node = {}
def node(g, name, **kwargs):
if "_point" in name:
kwargs.setdefault("shape", "point")
else:
kwargs.setdefault("fillcolor", "#77ff7788")
kwargs.setdefault("color", "#00000099")
kwargs.setdefault("label", strip_suffix(name))
g.node(name, **kwargs)
subgraph_to_first_node.setdefault(g.name, name)
subgraph_to_last_node[g.name] = name
def edge(g, a, b, dashed=False, **kwargs):
if kwargs.get("style") == "dashed":
kwargs.setdefault("penwidth", "1.5")
if a in subgraph_to_last_node:
kwargs.setdefault("ltail", a)
a = subgraph_to_last_node[a]
if b in subgraph_to_first_node:
kwargs.setdefault("lhead", b)
b = subgraph_to_first_node[b]
if a.startswith(("on_", "placeholder_")):
a += ":s"
else:
node(g, a.split(":")[0])
if b.startswith(("on_", "placeholder_")):
b += ":n"
else:
node(g, b.split(":")[0])
g.edge(a, b, **kwargs)
def ensure_order(a, b):
edge(graph, a, b, style="invis")
@contextlib.contextmanager
def cluster(g, name, **kwargs):
assert name.startswith("cluster_")
kwargs.setdefault("label", strip_suffix(name)[len("cluster_") :])
kwargs.setdefault("bgcolor", "#dddddd55")
kwargs.setdefault("pencolor", "#00000066")
with g.subgraph(name=name) as c:
c.attr(**kwargs)
yield c
def event(g, name, parameters):
with cluster(
g, f"cluster_{name}", href=f"#{name}", bgcolor="#ffff3388", pencolor="#00000088"
) as c:
label = "|".join(f"<{p}>{p}" for p in parameters.split())
node(c, name, shape="record" if parameters else "point", label=label, fillcolor="#ffffff55")
def placeholder_cluster(g, name):
with cluster(g, name) as c:
node(c, f"placeholder_{name}", label="...", fillcolor="transparent", color="transparent")
event(graph, "on_startup", "command dirty")
with cluster(graph, "cluster_build", bgcolor="#dddddd11") as g:
event(g, "on_config", "config")
event(g, "on_pre_build", "config")
event(g, "on_files", "files config")
event(g, "on_nav", "nav config files")
edge(g, "load_config", "on_config:config")
edge(g, "on_config:config", "on_pre_build:config")
edge(g, "on_config:config", "get_files")
edge(g, "get_files", "on_files:files")
edge(g, "on_files:files", "get_nav")
edge(g, "get_nav", "on_nav:nav")
edge(g, "on_files:files", "on_nav:files")
with cluster(g, "cluster_populate_page") as c:
event(c, "on_pre_page", "page config files")
event(c, "on_page_read_source", "page config")
event(c, "on_page_markdown", "markdown page config files")
event(c, "on_page_content", "html page config files")
edge(c, "on_pre_page:page", "on_page_read_source:page", style="dashed")
edge(c, "cluster_on_page_read_source", "on_page_markdown:markdown", style="dashed")
edge(c, "on_page_markdown:markdown", "render_p", style="dashed")
edge(c, "render_p", "on_page_content:html", style="dashed")
edge(g, "on_nav:files", "pages_point_a", arrowhead="none")
edge(g, "pages_point_a", "on_pre_page:page", style="dashed")
edge(g, "pages_point_a", "cluster_populate_page")
for i in 2, 3:
placeholder_cluster(g, f"cluster_populate_page_{i}")
edge(g, "pages_point_a", f"cluster_populate_page_{i}", style="dashed")
edge(g, f"cluster_populate_page_{i}", "pages_point_b", style="dashed")
event(g, "on_env", "env config files")
edge(g, "on_page_content:html", "pages_point_b", style="dashed")
edge(g, "pages_point_b", "on_env:files")
edge(g, "pages_point_b", "pages_point_c", arrowhead="none")
edge(g, "pages_point_c", "on_page_context:page", style="dashed")
with cluster(g, "cluster_build_page") as c:
event(c, "on_page_context", "context page config nav")
event(c, "on_post_page", "output page config")
edge(c, "get_context", "on_page_context:context")
edge(c, "on_page_context:context", "render")
edge(c, "get_template", "render")
edge(c, "render", "on_post_page:output")
edge(c, "on_post_page:output", "write_file")
edge(g, "on_nav:nav", "cluster_build_page")
edge(g, "on_env:env", "cluster_build_page")
for i in 2, 3:
placeholder_cluster(g, f"cluster_build_page_{i}")
edge(g, "pages_point_c", f"cluster_build_page_{i}", style="dashed")
event(g, "on_post_build", "config")
event(graph, "on_serve", "server config")
event(graph, "on_shutdown", "")
ensure_order("on_startup", "cluster_build")
ensure_order("on_pre_build", "on_files")
ensure_order("on_nav", "cluster_populate_page")
ensure_order("cluster_populate_page_2", "cluster_populate_page_3")
ensure_order("on_page_content", "on_env")
ensure_order("pages_point_c", "cluster_build_page")
ensure_order("cluster_build_page_2", "cluster_build_page_3")
ensure_order("cluster_build_page", "on_post_build")
ensure_order("on_post_build", "on_serve")
ensure_order("on_serve", "on_shutdown")
data = graph.pipe()
data = data[data.index(b"<svg ") :]
pathlib.Path(__file__).with_suffix(".svg").write_bytes(data)