Migration collection

Simple implementation of migration collection, ideas written down. aims to be easy for use, easy to be extended.

currently only filesystem, mssql, mariadb, postgres migration is implemented

NOTE: every component can be redefined and added instead of default one

• feeder - feeds with data collection, reads files from fs, and filters them based on extension
• sorter - sorts files based on it integer key eg. if file name is 121_abc.sql, integer keys is 121
• importer - imports migration file
• parser - parses imported file
• ledger - do the migration, acquire locks, check if migration is executed, execute it, and write it down
• end executes at the end, no mather if error was raised or migration succeeded

Examples - in example dir

all of them should return following structure

[
    {
        "baseName": "1_bca.sql",
        "path": "tests/unit/runtime/migration",
        "content": [
            "--------------UP",
            "SELECT 'up'",
            "--------------DOWN",
            "SELECT 'down'"
        ],
        "parsed": {
            "up": "SELECT 'up'",
            "down": "SELECT 'down'"
        },
        "migrated": false
    },
    {
        "baseName": "2_abc.sql",
        "path": "tests/unit/runtime/migration",
        "content": [
            "--------------UP",
            "SELECT 'up'",
            "--------------DOWN",
            "SELECT 'down'"
        ],
        "parsed": {
            "up": "SELECT 'up'",
            "down": "SELECT 'down'"
        },
        "migrated": true
    },
    {
        "baseName": "5_abc.sql",
        "path": "tests/unit/runtime/migration",
        "content": [
            "--------------UP",
            "SELECT 'up'",
            "--------------DOWN",
            "SELECT 'down'"
        ],
        "parsed": {
            "up": "SELECT 'up'",
            "down": "SELECT 'down'"
        },
        "migrated": true
    },
    {
        "baseName": "123_abc.sql",
        "path": "tests/unit/runtime/migration",
        "content": [
            "--------------UP",
            "SELECT 'up'",
            "--------------DOWN",
            "SELECT 'down'"
        ],
        "parsed": {
            "up": "SELECT 'up'",
            "down": "SELECT 'down'"
        },
        "migrated": true
    }
]