Make plotly-cloud a default install dependency

CHANGELOG.md

@@ -5,6 +5,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 ## [Unreleased]
 
 ### Added
+- [#3947](https://github.com/plotly/dash/pull/3947) Make `plotly-cloud` a default install dependency of Dash instead of an optional extra, so the `plotly` CLI and Dash's cloud integration are available out of the box. The `dash[cloud]` extra is kept for backward compatibility.
 - [#3930](https://github.com/plotly/dash/pull/3930) Shared storage: a backend-agnostic state manager available on every app via `dash.ctx.shared_storage` (and `app.shared_storage`), for sharing state between callbacks or across worker processes without an external service. Started lazily on first use, so it costs nothing until touched; pass `shared_storage=None` to `Dash(...)` to disable.
   - Cross-process key/value store (`get`/`set`/`delete`, with optional TTL) and ordered, replayable publish/subscribe (`publish`/`subscribe`). Subscriptions resume from the caller's last-seen sequence out of a bounded buffer, and a buffer overrun surfaces as an explicit gap rather than a silent loss. Values must be JSON-compatible (like `dcc.Store`).
   - Three backends ship, selected by passing a `BaseSharedStorage` instance to `shared_storage=`:

dash/_plotly_cli.py

@@ -9,7 +9,8 @@ def cli():
     except ImportError:
         print(
             "Plotly cloud is not installed,"
-            " install it with `pip install dash[cloud]` to use the plotly command",
+            " install it with `pip install plotly-cloud` (or reinstall dash)"
+            " to use the plotly command",
             file=sys.stderr,
         )
         sys.exit(-1)

requirements/install.txt

@@ -1,6 +1,7 @@
 Flask>=1.0.4,<3.2
 Werkzeug<3.2
 plotly>=5.0.0
+plotly-cloud
 importlib-metadata
 typing_extensions>=4.1.1
 requests

tests/integration/devtools/test_callback_validation.py

@@ -1,3 +1,5 @@
+import re
+
 import flask
 import pytest
 from flaky import flaky
@@ -31,6 +33,14 @@ def check_errors(dash_duo, specs):
     found = []
     for i in range(cnt):
         msg = dash_duo.find_elements(".dash-fe-error__title")[i].text
+        # plotly-cloud (a default install dep) injects a `_plotly-cloud-*`
+        # component into every layout via a dash_hooks entry point, so it
+        # shows up in the "string ids in the current layout" list. Strip it
+        # so these assertions hold whether or not plotly-cloud is installed.
+        msg = re.sub(r"_plotly-cloud[\w-]*", "", msg)
+        msg = re.sub(r",\s*,", ",", msg)
+        msg = re.sub(r",\s*\]", "]", msg)
+        msg = re.sub(r"\[\s*,\s*", "[", msg)
         dash_duo.find_elements(".test-devtools-error-toggle")[i].click()
         dash_duo.wait_for_element(".dash-backend-error,.dash-fe-error__info")
         has_BE = dash_duo.driver.execute_script(