initial commit

chaind/__init__.py

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+from .setup import Environment

chaind/db/migrations/default/README

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+Generic single-database configuration.

chaind/db/migrations/default/alembic.ini

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+# A generic, single database configuration.
+
+[alembic]
+# path to migration scripts
+script_location = .
+
+# template used to generate migration files
+# file_template = %%(rev)s_%%(slug)s
+
+# timezone to use when rendering the date
+# within the migration file as well as the filename.
+# string value is passed to dateutil.tz.gettz()
+# leave blank for localtime
+# timezone =
+
+# max length of characters to apply to the
+# "slug" field
+# truncate_slug_length = 40
+
+# set to 'true' to run the environment during
+# the 'revision' command, regardless of autogenerate
+# revision_environment = false
+
+# set to 'true' to allow .pyc and .pyo files without
+# a source .py file to be detected as revisions in the
+# versions/ directory
+# sourceless = false
+
+# version location specification; this defaults
+# to ./versions.  When using multiple version
+# directories, initial revisions must be specified with --version-path
+# version_locations = %(here)s/bar %(here)s/bat ./versions
+
+# the output encoding used when revision files
+# are written from script.py.mako
+# output_encoding = utf-8
+
+sqlalchemy.url = postgresql+psycopg2://postgres@localhost:5432/chaind
+
+
+[post_write_hooks]
+# post_write_hooks defines scripts or Python functions that are run
+# on newly generated revision scripts.  See the documentation for further
+# detail and examples
+
+# format using "black" - use the console_scripts runner, against the "black" entrypoint
+# hooks=black
+# black.type=console_scripts
+# black.entrypoint=black
+# black.options=-l 79
+
+# Logging configuration
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARN
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARN
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S

chaind/db/migrations/default/env.py

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+from logging.config import fileConfig
+
+from sqlalchemy import engine_from_config
+from sqlalchemy import pool
+
+from alembic import context
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+config = context.config
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+fileConfig(config.config_file_name)
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+# from myapp import mymodel
+# target_metadata = mymodel.Base.metadata
+target_metadata = None
+
+# other values from the config, defined by the needs of env.py,
+# can be acquired:
+# my_important_option = config.get_main_option("my_important_option")
+# ... etc.
+
+
+def run_migrations_offline():
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well.  By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+
+    """
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online():
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+    connectable = engine_from_config(
+        config.get_section(config.config_ini_section),
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection, target_metadata=target_metadata
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

chaind/db/migrations/default/script.py.mako

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+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision = ${repr(up_revision)}
+down_revision = ${repr(down_revision)}
+branch_labels = ${repr(branch_labels)}
+depends_on = ${repr(depends_on)}
+
+
+def upgrade():
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade():
+    ${downgrades if downgrades else "pass"}

chaind/db/migrations/default/versions/7ac591b16c68_chainqueue.py

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+"""chainqueue
+
+Revision ID: 7ac591b16c68
+Revises: b139fca16787
+Create Date: 2021-06-03 13:11:24.579148
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+from chainqueue.db.migrations.sqlalchemy import (
+    chainqueue_upgrade,
+    chainqueue_downgrade,
+    )
+
+# revision identifiers, used by Alembic.
+revision = '7ac591b16c68'
+down_revision = 'b139fca16787'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    chainqueue_upgrade()
+
+
+def downgrade():
+    chainqueue_downgrade()

chaind/db/migrations/default/versions/b139fca16787_chainsyncer.py

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+"""chainsyncer
+
+Revision ID: b139fca16787
+Revises: 
+Create Date: 2021-06-03 13:09:23.731381
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+from chainsyncer.db.migrations.sqlalchemy import (
+        chainsyncer_upgrade,
+        chainsyncer_downgrade,
+        )
+
+# revision identifiers, used by Alembic.
+revision = 'b139fca16787'
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    chainsyncer_upgrade()
+
+
+def downgrade():
+    chainsyncer_downgrade()

chaind/setup.py

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+# standard imports
+import os
+import uuid
+
+# external imports
+import chainqueue
+import chainsyncer
+from xdg.BaseDirectory import (
+        xdg_data_dirs,
+        get_runtime_dir,
+        load_first_config,
+        )
+
+
+class Environment:
+
+    def __init__(self, domain=None, session=None, env={}):
+        if not session:
+            session = env.get('CHAIND_SESSION')
+        if not session:
+            session = uuid.uuid4()
+        self.__session = session
+
+        if not domain:
+            domain = env.get('CHAIND_DOMAIN')
+
+        base_config_dir = load_first_config('chaind')
+        self.runtime_dir = os.path.join(get_runtime_dir(), 'chaind')
+        self.data_dir = os.path.join(xdg_data_dirs[0], 'chaind')
+        self.config_dir = env.get('CONFINI_DIR', os.path.join(base_config_dir))
+        self.session_runtime_dir = os.path.join(self.runtime_dir, self.session)
+
+        if domain:
+            self.runtime_dir = os.path.join(self.runtime_dir, domain)
+            self.data_dir = os.path.join(self.data_dir, domain)
+            self.config_dir = os.path.join(self.config_dir, domain)
+            self.session_runtime_dir = os.path.join(self.runtime_dir, self.session)
+
+    @property
+    def session(self):
+        return str(self.__session)