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MyVC (MySQL Version Control)

Utilities to ease the maintenance of MySQL or MariaDB database versioning using a Git repository.

This project is just to bring an idea to life and is still in an early stage of development, so any help is welcomed! Feel free to contribute.

Requirements

Node.js >= 14.0
Git
Docker (Local server)

Installation

It's recommended to install the package globally.

# npm install -g myvc
$ myvc [command]

You can also install locally and use the npx command to execute it.

$ npm install myvc
$ npx myvc [command]

How to use

Execute myvc with the desired command.

$ myvc [-w|--workspace] [-r|--remote] [-d|--debug] [-h|--help] command [args]

The default workspace directory is the current working directory and unless otherwise indicated, the default remote is local.

Database versioning commands:

init: Initialize an empty workspace.
pull: Incorporate database routine changes into workspace.
push: Apply changes into database.
version: Creates a new version.

Local server management commands:

dump: Export database structure and fixtures from production.
run: Build and starts local database server container.
start: Start local database server container.

Each command can have its own specific commandline options.

Versioning commands

init

Initializes an empty workspace.

$ myvc init

pull

Incorporates database routine changes into workspace.

$ myvc pull [remote] [-f|--force] [-c|--checkout]

When checkout option is provided, it does the following steps:

Saves the current HEAD.
Check out to the last database push commit (saved in versioning tables).
Creates and checkout to a new branch.
Exports database routines.
Commits the new changes.
Checkout to the original HEAD.
Merge the new branch into.
Let the user deal with merge conflicts.

push

Applies versions and routine changes into database.

$ myvc push [remote] [-f|--force] [-u|--user]

version

Creates a new version folder, when name is not specified it generates a random name mixing color with plant name.

$ myvc version [name]

Local server commands

dump

Exports database structure and fixtures from remote into hidden files located in dump folder.

$ myvc dump [remote]

run

Builds and starts local database server container. It only rebuilds the image when fixtures have been modified or when the day on which the image was built is different to today.

$ myvc run [-c|--ci] [-r|--random]

start

Starts local database server container. It does the minium effort, if it doesn't exists calls the run command, if it is started does nothing. Keep in mind that when you do not rebuild the docker you may be using an outdated version of it.

$ myvc start

Basic information

First of all you have to initalize your workspace.

$ myvc init

Now you can configure MyVC using myvc.config.yml file, located at the root of your workspace. This file should include the project codename and schemas/tables wich are exported when you use pull or dump commands.

Remotes

Create database connection configuration for each environment at remotes folder using standard MySQL ini configuration files. The convention remote names are production and test.

remotes/[remote].ini

Routines

Routines should be placed inside routines folder. All objects that have PL/SQL code are considered routines. It includes events, functions, procedures, triggers and views with the following structure.

  routines
  `- schema
     |- events
     |  `- eventName.sql
     |- functions
     |  `- functionName.sql
     |- procedures
     |  `- procedureName.sql
     |- triggers
     |  `- triggerName.sql
     `- views
        `- viewName.sql

Versions

Versions are placed inside versions folder with the following structure. Don't place your PL/SQL objects here, use the routines folder!

  versions
  |- 00001-firstVersionCodeName
  |  |- 00-firstExecutedScript.sql
  |  |- 01-secondScript.sql
  |  `- 99-lastScript.sql
  `- 00002-secondVersion
     |- 00-firstExecutedScript.sql
     `- 00-sameNumbers.sql

Local server

The local server is created as a MariaDB Docker container using the base dump created with the dump command plus pushing local versions and changed routines.

Dumps

You can create your local fixture and structure files.

dump/structure.sql
dump/fixtures.sql

Why

The main reason for starting this project it's because there are no fully free and opensource migration tools available that allow versioning database routines with an standard CVS system as if they were normal application code.

Also, the existing tools are too complex and require too much knowledge to start a small project.

Todo

Improve help option for commands.
Allow to specify a custom workspace subdirectory inside project directory.
Create a lock during push to avoid collisions.
Use a custom Dockerfile for local database container.

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