feat: Add migrator create script

- Implement a script that creates a migration file based on a template.
- The script reads the current version from a file and generates the filename using the current date and time.
- The template file is filled with the current date, filename, and version.
- The modified content is written to the new file.
- Finally, the script prints the filename of the created migration file.

This commit introduces the `create.py` script and the `template.py` file that is used as a placeholder for the generated migrations.

backend/app/migrator/create.py

@@ -0,0 +1,41 @@
+#!/usr/bin/env python
+from datetime import datetime
+from os import path
+from packaging.version import parse
+
+def get_current_version():
+ # File path to the version file
+ version_file = path.join(path.dirname(path.realpath(__file__)), "../", "../", "../", "latest")
+
+ # Read the current version
+ with open(version_file, "r") as f:
+ current_version = parse(f.read())
+
+ return current_version
+
+# Get the current script's directory
+script_dir = path.dirname(path.abspath(__file__ if '__file__' in locals() else path.abspath(path.realpath(__file__))))
+
+# Define the path to the template file relative to the script's directory
+template_file = path.join(script_dir, "template.py")
+
+# Get the current date and time in YYYY-MM-DD_HH-MM-SS format
+current_time = datetime.now().strftime("%Y-%m-%d_%H-%M-%S")
+
+# Create the filename with the current date in the current directory
+filename = path.join(script_dir, "migrations", f"{current_time}.py")
+
+# Read the content of the template file
+with open(template_file, "r") as template:
+ template_content = template.read()
+
+# Replace {data} with Tue Oct 10 2023 date format and replace {name} with the filename
+template_content = template_content.replace("{date}", datetime.now().strftime("%a %b %d %Y"))
+template_content = template_content.replace("{name}", current_time)
+template_content = template_content.replace("{version}", str(get_current_version()))
+
+# Write the modified content to the new file
+with open(filename, "w") as new_file:
+ new_file.write(template_content)
+
+print(f"MIGRATION: {filename} created")

backend/app/migrator/template.py

@@ -0,0 +1,17 @@
+#
+# CREATED ON VERSION: V{version}
+# MIGRATION: {name}
+# CREATED: {date}
+#
+
+from peewee import *
+from playhouse.migrate import *
+
+from app import db
+
+# Do not change the name of this file,
+# migrations are run in order of their filenames date and time
+
+def run():
+ # Use migrator to perform actions on the database
+ migrator = SqliteMigrator(db)