Add init template for flask-framework

charmcraft/commands/init.py

@@ -35,6 +35,7 @@
     "simple": "init-simple",
     "kubernetes": "init-kubernetes",
     "machine": "init-machine",
+    "flask-framework": "init-flask-framework",
 }
 DEFAULT_PROFILE = "simple"
 

charmcraft/providers.py

@@ -34,6 +34,7 @@
 
 from charmcraft import const
 from charmcraft.bases import check_if_base_matches_host
+from charmcraft.const import EXPERIMENTAL_EXTENSIONS_ENV_VAR
 from charmcraft.env import (
     get_managed_environment_log_path,
     get_managed_environment_snap_channel,
@@ -130,7 +131,7 @@ def get_command_environment(base: Base) -> dict[str, str]:
     env[const.MANAGED_MODE_ENV_VAR] = "1"
 
     # Pass-through host environment that target may need.
-    for env_key in ["http_proxy", "https_proxy", "no_proxy"]:
+    for env_key in ["http_proxy", "https_proxy", "no_proxy", EXPERIMENTAL_EXTENSIONS_ENV_VAR]:
         if env_key in os.environ:
             env[env_key] = os.environ[env_key]
 

charmcraft/templates/init-flask-framework/.gitignore.j2

@@ -0,0 +1,9 @@
+venv/
+build/
+*.charm
+.tox/
+.coverage
+__pycache__/
+*.py[cod]
+.idea
+.vscode/

charmcraft/templates/init-flask-framework/charmcraft.yaml.j2

@@ -0,0 +1,31 @@
+# This file configures Charmcraft.
+# See https://juju.is/docs/sdk/charmcraft-config for guidance.
+
+name: {{ name }}
+
+bases:
+  - build-on:
+    - name: ubuntu
+      channel: "22.04"
+    run-on:
+    - name: ubuntu
+      channel: "22.04"
+
+# (Required)
+summary: A very short one-line summary of the flask application.
+
+# (Required)
+description: |
+  A comprehensive overview of your Flask application.
+
+extensions:
+  - flask-framework
+
+# Uncomment the integrations used by your application
+# requires:
+#   mysql:
+#     interface: mysql_client
+#     limit: 1
+#   postgresql:
+#     interface: postgresql_client
+#     limit: 1

charmcraft/templates/init-flask-framework/requirements.txt.j2

@@ -0,0 +1 @@
+https://github.com/canonical/xiilib/archive/v0.1.0.tar.gz

charmcraft/templates/init-flask-framework/src/charm.py.j2

@@ -0,0 +1,30 @@
+#!/usr/bin/env python3
+# Copyright {{ year }} {{ author }}
+# See LICENSE file for licensing details.
+
+"""Flask Charm entrypoint."""
+
+import logging
+import typing
+
+import ops
+
+import xiilib.flask
+
+logger = logging.getLogger(__name__)
+
+
+class FlaskCharm(xiilib.flask.Charm):
+    """Flask Charm service."""
+
+    def __init__(self, *args: typing.Any) -> None:
+        """Initialize the instance.
+
+        Args:
+            args: passthrough to CharmBase.
+        """
+        super().__init__(*args)
+
+
+if __name__ == "__main__":  # pragma: nocover
+    ops.main.main(FlaskCharm)

tests/spread/commands/init-flask-framework/task.yaml

@@ -0,0 +1,23 @@
+summary: test charmcraft init with flask-framework profile
+
+execute: |
+  mkdir -p test-init
+  cd test-init
+  charmcraft init --profile flask-framework
+  export CHARMCRAFT_ENABLE_EXPERIMENTAL_EXTENSIONS=true
+  charmcraft fetch-lib charms.traefik_k8s.v2.ingress
+  charmcraft fetch-lib charms.observability_libs.v0.juju_topology
+  charmcraft fetch-lib charms.grafana_k8s.v0.grafana_dashboard
+  charmcraft fetch-lib charms.loki_k8s.v0.loki_push_api
+  charmcraft fetch-lib charms.data_platform_libs.v0.data_interfaces
+  charmcraft fetch-lib charms.prometheus_k8s.v0.prometheus_scrape
+  charmcraft pack --verbose
+  test -f *.charm
+
+restore: |
+  export CHARMCRAFT_ENABLE_EXPERIMENTAL_EXTENSIONS=true
+  pushd test-init
+  charmcraft clean
+  popd
+
+  rm -rf test-init

tests/spread/dependencies/strict-dependencies/charm/lib/charms/charm/v0/my_lib.py

@@ -13,6 +13,9 @@
 # limitations under the License.
 #
 # For further info, check https://github.com/canonical/charmcraft
+
+"""Test charm library."""
+
 PYDEPS = ["ops"]
 LIBID = "my_lib"
 LIBAPI = 0