Database generator

grace/application.py

@@ -39,11 +39,6 @@ class Application:
     __base: DeclarativeMeta = declarative_base()
 
     def __init__(self):
-        database_config_path: Path = Path("config/database.cfg")
-
-        if not database_config_path.exists():
-            raise ConfigError("Unable to find the 'database.cfg' file.")
-
         self.__token: str = self.config.get("discord", "token")
         self.__engine: Union[Engine, None] = None
 
@@ -78,6 +73,20 @@ def config(self) -> Config:
     def client(self) -> SectionProxy:
         return self.config.client
 
+    @property
+    def database(self) -> SectionProxy:
+        return self.config.database
+
+    @property
+    def database_infos(self) -> Dict[str, str]:
+        if not self.database:
+            return {}
+
+        return {
+            "dialect": self.session.bind.dialect.name,
+            "database": self.session.bind.url.database
+        }
+
     @property
     def extension_modules(self) -> Generator[str, Any, None]:
         """Generate the extensions modules"""
@@ -90,17 +99,6 @@ def extension_modules(self) -> Generator[str, Any, None]:
                 continue
             yield module
 
-    @property
-    def database_infos(self) -> Dict[str, str]:
-        return {
-            "dialect": self.session.bind.dialect.name,
-            "database": self.session.bind.url.database
-        }
-
-    @property
-    def database_exists(self):
-        return database_exists(self.config.database_uri)
-
     def get_extension_module(self, extension_name) -> Union[str, None]:
         """Return the extension from the given extension name"""
 
@@ -150,17 +148,23 @@ def load_logs(self):
 
     def load_database(self):
         """Loads and connects to the database using the loaded config"""
+        if not self.database:
+            return None
 
         self.__engine = create_engine(
             self.config.database_uri,
             echo=self.config.environment.getboolean("sqlalchemy_echo")
         )
 
-        if self.database_exists:
+        if database_exists(self.config.database_uri):
             try:
                 self.__engine.connect()
             except OperationalError as e:
                 critical(f"Unable to load the 'database': {e}")
+        else:
+            self.create_database()
+            self.create_tables()
+
 
     def unload_database(self):
         """Unloads the current database"""
@@ -179,24 +183,32 @@ def reload_database(self):
 
     def create_database(self):
         """Creates the database for the current loaded config"""
+        if not self.database:
+            return None
 
         self.load_database()
         create_database(self.config.database_uri)
 
     def drop_database(self):
         """Drops the database for the current loaded config"""
+        if not self.database:
+            return None
 
         self.load_database()
         drop_database(self.config.database_uri)
 
     def create_tables(self):
         """Creates all the tables for the current loaded database"""
+        if not self.database:
+            return None
 
         self.load_database()
         self.base.metadata.create_all(self.__engine)
 
     def drop_tables(self):
         """Drops all the tables for the current loaded database"""
+        if not self.database:
+            return None
 
         self.load_database()
         self.base.metadata.drop_all(self.__engine)

grace/cli.py

@@ -12,6 +12,9 @@
 | PID: {pid}
 | Environment: {env}
 | Syncing command: {command_sync}
+""".rstrip()
+
+DB_INFO = """
 | Using database: {database} with {dialect}
 """.rstrip()
 
@@ -29,9 +32,7 @@ def generate():
 
 @cli.command()
 @argument("name")
-# This database option is currently disabled since the application and config 
-# does not currently support it.
-# @option("--database/--no-database", default=True)
+@option("--database/--no-database", default=True)
 @pass_context
 def new(ctx, name, database=True):
     cmd = generate.get_command(ctx, 'project')
@@ -48,7 +49,6 @@ def run(environment=None, sync=None):
         from bot import app, run
 
         _loading_application(app, environment, sync)
-        _load_database(app)
         _show_application_info(app)
 
         run()
@@ -60,19 +60,19 @@ def _loading_application(app, environment, command_sync):
     app.load(environment, command_sync=command_sync)
 
 
-def _load_database(app):
-    if not app.database_exists:
-        app.create_database()
-        app.create_tables()
-
 def _show_application_info(app):
-    info(APP_INFO.format(
+    info_message = APP_INFO
+
+    if app.database:
+        info_message += DB_INFO
+
+    info(info_message.format(
         discord_version=discord.__version__,
         env=app.config.current_environment,
         pid=getpid(),
         command_sync=app.command_sync,
-        database=app.database_infos["database"],
-        dialect=app.database_infos["dialect"],
+        database=app.database_infos.get("database"),
+        dialect=app.database_infos.get("dialect"),
     ))
 
 

grace/config.py

@@ -75,12 +75,19 @@ def __init__(self):
             interpolation=EnvironmentInterpolation()
         )
 
-        self.read("config/settings.cfg")
-        self.read("config/database.cfg")
+        self.read("config/config.cfg")
         self.read("config/environment.cfg")
 
+        self.__database_config = self.get("database", "config")
+
+        if self.__database_config:
+            self.read(f"config/{self.__database_config}")
+
     @property
     def database_uri(self) -> Union[str, URL]:
+        if not self.database:
+            return None
+
         if self.database.get("url"):
             return self.database.get("url")
 
@@ -95,6 +102,8 @@ def database_uri(self) -> Union[str, URL]:
 
     @property
     def database(self) -> SectionProxy:
+        if not self.__database_config:
+            return None
         return self.__config[f"database.{self.__environment}"]
 
     @property

grace/generator.py

@@ -108,7 +108,12 @@ def validate(self, *args, **kwargs):
         """Validates the arguments passed to the command."""
         return True
 
-    def generate_template(self, template_dir: str, variables: dict[str, any] = {}):
+    def generate_template(
+        self,
+        template_dir: str,
+        variables: dict[str, any] = {},
+        output_dir: str = ""
+    ):
         """Generates a template using Cookiecutter.
 
         :param template_dir: The name of the template to generate.
@@ -118,7 +123,12 @@ def generate_template(self, template_dir: str, variables: dict[str, any] = {}):
         :type variables: dict[str, any]
         """
         template = str(self.templates_path / template_dir)
-        cookiecutter(template, extra_context=variables, no_input=True)
+        cookiecutter(
+            template,
+            extra_context=variables,
+            no_input=True,
+            output_dir=output_dir
+        )
 
     def generate_file(
         self,

grace/generators/database_generator.py

@@ -0,0 +1,19 @@
+from grace.generator import Generator
+from re import match
+from logging import info
+
+
+class DatabaseGenerator(Generator):
+    NAME = 'database'
+    OPTIONS = {}
+
+    def generate(self, output_dir: str = ""):
+        info(f"Creating database")
+        self.generate_template(self.NAME, output_dir=output_dir)
+
+    def validate(self, *_args, **_kwargs) -> bool:
+        return True
+
+
+def generator() -> Generator:
+    return DatabaseGenerator()

grace/generators/project_generator.py

@@ -1,4 +1,5 @@
 from grace.generator import Generator
+from grace.generators.database_generator import generator as db_generator
 from re import match
 from logging import info
 
@@ -12,12 +13,17 @@ class ProjectGenerator(Generator):
     def generate(self, name: str, database: bool = True):
         info(f"Creating '{name}'")
 
-        self.generate_template(self.NAME, values={
+        self.generate_template(self.NAME, variables={
             "project_name": name,
 			"project_description": "",
-			"database": "yes" if database else "no"
+            "database": database
         })
 
+        if database:
+            # Should probably be moved into it's own generator so we can
+            # generate add the database later on.
+            db_generator().generate(output_dir=name)
+
     def validate(self, name: str, **_kwargs) -> bool:
         """Validate the project name.
 

grace/generators/templates/database/cookiecutter.json

@@ -0,0 +1,3 @@
+{
+	"__database_slug": "db"
+}

grace/generators/templates/project/cookiecutter.json

@@ -3,5 +3,5 @@
   "__project_slug": "{{ cookiecutter.project_name|lower|replace('-', '_') }}",
   "__project_class": "{{ cookiecutter.project_name|title|replace('-', '') }}",
   "project_description": "{{ cookiecutter.project_description }}",
-  "database": ["yes", "no"]
+  "database": [true, false]
 }

grace/generators/templates/project/{{ cookiecutter.__project_slug }}/config/settings.cfg → grace/generators/templates/project/{{ cookiecutter.__project_slug }}/config/config.cfg

@@ -8,3 +8,7 @@ guild_id = ${GUILD_ID}
 ; Although it is possible to set directly your discord token here, we recommend, for security reasons, that you set
 ; your discord token as an environment variable called 'DISCORD_TOKEN'.
 token = ${DISCORD_TOKEN}
+{% if cookiecutter.database %}
+[database]
+config = database.cfg
+{% endif %}