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`dense-evolution` console script (see pyproject.toml [project.scripts]).
Three real subcommands:
serve starts the local Composer kernel (local_site.app.server)
that the published Composer page (docs/composer.md)
talks to.
offline-composer downloads the real published Composer page (the same
HTML Github Pages serves, not a hand-rolled copy) plus
the same-origin assets it references, into a local
folder -- so it opens via file:// with no internet at
all, while still talking to the local kernel above.
mcp starts the dense_evolution_mcp MCP server (mcp_server/),
a thin adapter that exposes the same Composer kernel
endpoints as MCP tools for an agent to call directly.
Requires `serve` running separately -- this process
talks to that kernel over HTTP, it doesn't embed it.
fastapi/uvicorn/pydantic (composer) and mcp/httpx (mcp) are optional
extras, not core dependencies -- imported here, inside their own command
branch, not at module level, so `import dense_evolution` itself never
requires them.
"""
import sys
USAGE = """usage: dense-evolution <command>
commands:
serve Start the local Composer kernel (http://127.0.0.1:8800)
that the published Composer page (docs/composer.md)
connects to.
offline-composer [DEST] Download the real published Composer page and its
assets into DEST (default: ./composer-offline) so
it works via file:// with no internet.
mcp Start the dense_evolution_mcp MCP server (stdio
transport) so an agent can call the Composer
kernel's endpoints directly. Requires `serve`
running separately (default http://127.0.0.1:8800,
override with DENSE_EVOLUTION_KERNEL_URL).
Requires the composer extra: pip install dense-evolution[composer]
The mcp command requires the mcp extra: pip install dense-evolution[mcp]
"""
COMPOSER_PAGE_URL = "https://tatopenn-cell.github.io/Dense-Evolution/composer/"
def _require_composer_extra():
try:
import fastapi, uvicorn, pydantic # noqa: F401
except ImportError as exc:
print(
"dense-evolution needs the composer extra:\n"
" pip install dense-evolution[composer]\n"
f"(missing: {exc.name})",
file=sys.stderr,
)
sys.exit(1)
def _cmd_serve():
_require_composer_extra()
from local_site.app.server import main as serve_main
serve_main()
def _require_mcp_extra():
try:
import mcp, httpx # noqa: F401
except ImportError as exc:
print(
"dense-evolution needs the mcp extra:\n"
" pip install dense-evolution[mcp]\n"
f"(missing: {exc.name})",
file=sys.stderr,
)
sys.exit(1)
def _cmd_mcp():
_require_mcp_extra()
from mcp_server.server import main as mcp_main
mcp_main()
def _cmd_offline_composer(dest: str):
"""Mirrors COMPOSER_PAGE_URL into `dest`: the page itself plus every
same-origin <link href>/<script src> it references (Material's shared
theme CSS/JS bundle, the Composer-specific app.js/style.css), each
saved at the same relative path it already uses on the live site --
mkdocs/Material already generate those as page-relative, precisely so
a subtree like this stays self-consistent once copied elsewhere. Not a
full recursive mirror (fonts referenced only from inside a CSS url()
are not followed -- Material falls back to system fonts without them,
a cosmetic gap, not a functional one): scoped to what the page's own
<head>/<body> actually link to, which is everything the Composer UI
itself needs to run."""
import os
import urllib.request
from html.parser import HTMLParser
from urllib.parse import urljoin, urlparse
class _AssetFinder(HTMLParser):
def __init__(self):
super().__init__()
self.assets = []
def handle_starttag(self, tag, attrs):
attrs = dict(attrs)
# mkdocs Material's <head> has plenty of other <link> rels
# (canonical, prev, next, preconnect, ...) that point at other
# *pages* (directories, not files) or aren't fetchable assets
# at all -- verified directly against the real page: following
# rel="prev"/"next" tried to write a file at a directory-shaped
# path and failed with a permission error. Only stylesheet/icon
# links are real same-origin files worth mirroring.
if tag == "link" and attrs.get("href") and attrs.get("rel") in ("stylesheet", "icon"):
self.assets.append(attrs["href"])
elif tag == "script" and attrs.get("src"):
self.assets.append(attrs["src"])
elif tag == "img" and attrs.get("src"):
self.assets.append(attrs["src"])
print(f"Scarico {COMPOSER_PAGE_URL} ...")
with urllib.request.urlopen(COMPOSER_PAGE_URL, timeout=30) as resp:
html_bytes = resp.read()
html_text = html_bytes.decode("utf-8", errors="replace")
parser = _AssetFinder()
parser.feed(html_text)
page_url = urlparse(COMPOSER_PAGE_URL)
base_origin = f"{page_url.scheme}://{page_url.netloc}"
# mkdocs generates every relative link (../assets/...) relative to the
# SITE root, not to whatever folder happens to hold index.html -- so
# the page itself has to be saved at the same depth under `dest` it
# already has under the site root (site_root_path stripped from its
# own path leaves "composer/"), or its own "../assets/..." references
# end up pointing one directory above `dest` instead of inside it.
# site_root_path is derived from COMPOSER_PAGE_URL itself (this
# project's one fixed, known URL), not guessed from each asset URL.
site_root_path = page_url.path.rsplit("composer/", 1)[0]
def _relative_to_site_root(url: str) -> str:
path = urlparse(url).path
if path.startswith(site_root_path):
path = path[len(site_root_path):]
return path.lstrip("/")
os.makedirs(dest, exist_ok=True)
page_relative_path = _relative_to_site_root(COMPOSER_PAGE_URL) + "index.html"
page_local_path = os.path.join(dest, page_relative_path)
os.makedirs(os.path.dirname(page_local_path), exist_ok=True)
with open(page_local_path, "w", encoding="utf-8") as f:
f.write(html_text)
seen = set()
for href in parser.assets:
absolute_url = urljoin(COMPOSER_PAGE_URL, href)
if not absolute_url.startswith(base_origin) or absolute_url in seen:
continue # a genuinely external resource (e.g. a CDN) -- not ours to mirror
seen.add(absolute_url)
relative_path = _relative_to_site_root(absolute_url)
local_path = os.path.join(dest, relative_path)
os.makedirs(os.path.dirname(local_path), exist_ok=True)
try:
with urllib.request.urlopen(absolute_url, timeout=30) as resp:
data = resp.read()
with open(local_path, "wb") as f:
f.write(data)
print(f" scaricato: {relative_path}")
except Exception as exc:
print(f" saltato (non essenziale): {relative_path} ({exc})")
print(f"\nCopia offline pronta: {page_local_path}")
return page_local_path
def main(argv=None):
args = argv if argv is not None else sys.argv[1:]
if args == ["serve"]:
_cmd_serve()
return
if args and args[0] == "offline-composer":
dest = args[1] if len(args) > 1 else "composer-offline"
_cmd_offline_composer(dest)
return
if args == ["mcp"]:
_cmd_mcp()
return
print(USAGE, file=sys.stderr if args else sys.stdout)
sys.exit(1 if args else 0)
if __name__ == "__main__":
main()
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