fh-fablib
Project description
Usage
Install pipx
Install uv using pipx install uv
Install fh-fablib
pipx install fh_fablib if you’re happy with the packaged version
pipx install ~/Projects/fh-fablib if you have a local git checkout you want to install from
Add a fabfile.py to your project. A minimal example follows:
import fh_fablib as fl fl.require("1.0.20241122.2") fl.config.update(host="www-data@feinheit06.nine.ch") environments = [ fl.environment( "production", { "domain": "example.com", "branch": "main", "remote": "production", }, aliases=["p"], ), ] ns = fl.Collection(*fl.GENERAL, *fl.NINE, *environments)Run fl hook to provide a default pre-commit configuration (or fl hook --force to override the dotfiles).
Run fl --list to get a list of commands.
Configuration values
app = "app": Name of primary Django app containing settings, assets etc.
base: pathlib.Path object pointing to the base dir of the project.
branch: Branch containing code to be deployed.
domain: Primary domain of website. The database name and cache key prefix are derived from this value.
environments: A dictionary of environments, see below.
environment: The name of the active environment or "default".
force: Always force-push when deploying.
host: SSH connection string (username@server)
remote: git remote name for the server. Only used for the fetch task.
Adding or overriding bundled tasks
For the sake of an example, suppose that additional processes should be restarted after deployment. A custom deploy task follows:
# ... continuing the fabfile above
@fl.task
def deploy(ctx):
"""Deploy once 🔥"""
fl.deploy(ctx) # Reuse
with fl.Connection(fl.config.host) as conn:
fl.run(conn, "systemctl --user restart other.service")
ns.add_task(deploy)Multiple environments
If you need multiple environments, add environment tasks as follows:
import fh_fablib as fl
fl.require("1.0.20241122.2")
fl.config.update(host="www-data@feinheit06.nine.ch")
environments = [
fl.environment(
"production",
{
"domain": "example.com",
"branch": "main",
"remote": "production",
},
aliases=["p"],
),
fl.environment(
"next",
{
"domain": "next.example.com",
"branch": "next",
"remote": "next",
},
aliases=["n"],
),
]
ns = fl.Collection(*fl.GENERAL, *fl.NINE, *environments)Now, fl production pull-db, fl next deploy and friends should work as expected.
Available tasks
fh_fablib.GENERAL
check: Check the coding style
cm: Compile the translation catalogs
debug: Run development server with debugpy enabled
deploy: Deploy once 🔥
dev: Run the development server for the frontend and backend
fetch: Ensure a remote exists for the server and fetch
freeze: Freeze the virtualenv’s state
github: Create a repository on GitHub and push the code
hook: Install the pre-commit hook
local: Local environment setup
mm: Update the translation catalogs
pull-db: Pull a local copy of the remote DB and reset all passwords
pull-media: Rsync a folder from the remote to the local environment
reset-pw: Set all user passwords to "password"
reset-sq: Reset all PostgreSQL sequences
update: Update virtualenv and node_modules to match the lockfiles
upgrade: Re-create the virtualenv with newest versions of all libraries
fh_fablib.NINE
nine: Run all nine🌟 setup tasks in order
nine-alias-add: Add aliasses to a nine-manage-vhost virtual host
nine-alias-remove: Remove aliasses from a nine-manage-vhost virtual host
nine-checkout: Checkout the repository on the server
nine-db-dotenv: Create a database and initialize the .env. Currently assumes that the shell user has superuser rights (either through PGUSER and PGPASSWORD environment variables or through peer authentication)
nine-disable: Disable a virtual host, dump and remove the DB and stop the gunicorn@ unit
nine-reinit-from: Reinitialize an environment from a different environment
nine-restart: Restart the application server
nine-ssl: Activate SSL
nine-unit: Start and enable a gunicorn@ unit
nine-venv: Create a venv and install packages from requirements.txt
nine-vhost: Create a virtual host using nine-manage-vhosts
Building blocks
The following functions may be used to build your own tasks. They cannot be executed directly from the command line.
Running commands
run(c, ...): Wrapper around Context.run or Connection.run which always sets a few useful arguments (echo=True, pty= True and replace_env=False at the time of writing)
Checks
_check_branch(ctx): Terminates if checked out branch does not match configuration.
_check_no_uncommitted_changes(ctx): Terminates if there are uncommitted changes on the server.
Helpers
_local_env(path=".env"): speckenv.env for a local env file
_srv_env(conn, path): speckenv.env for a remote env file
_python3(): Return the path of a Python 3 executable. Prefers newer Python versions.
_local_dotenv_if_not_exists(): Ensure a local .env with a few default values exists. Does nothing if .env exists already.
_local_dbname(): Ensure a local .env exists and return the database name.
_dbname_from_dsn(dsn): Extract the database name from a DSN.
_dbname_from_domain(domain): Mangle the domain to produce a string suitable as a database name, database user and cache key prefix.
_concurrently(ctx, jobs): Run a list of shell commands concurrently and wait for all of them to terminate (or Ctrl-C).
_random_string(length, chars=None): Return a random string of length, suitable for generating secret keys etc.
require(version): Terminate if fh_fablib is older.
terminate(msg): Terminate processing with an error message.
Deployment
_deploy_django: Update the Git checkout, update the virtualenv.
_deploy_staticfiles: Collect staticfiles.
_rsync_static: rsync the local static/ folder to the remote, optionally deleting everything which doesn’t exist locally.
_nine_restart: Restart the systemd control unit.
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