MC 37324: Add fallback to 'patch' command when 'git' command is not available

[bubasuma]

Description

As a Magento OnPrem Customer, I want to be able to apply patches with 'patch' command if I don't have 'Git' installed.

Currently, we have a recommendation  to use 'patch' command for patch applying. So probably some OnPrem customers don't have installed  'Git'  and can't use MQP tool.

Fixed Issues (if relevant)

MC 37324: Add fallback to 'patch' command when 'git' command is not available

Manual testing scenarios

Scenario 1 (GIT is installed, PATCH is installed)

Check that GIT is used to apply/revert patches and

• Check that patch can be applied/reverted
• Check that correct status is shown for patches in patch list (vendor/bin/magento-patches status)
• Check that error message is shown if patch cannot be applied/reverted for some reason (e.g conflict)

Scenario 2 (GIT is not installed, PATCH is installed)

Check that PATCH is used to apply/revert patches and

• Check that patch can be applied/reverted
• Check that correct status is shown for patches in patch list (vendor/bin/magento-patches status)
• Check that error message is shown if patch cannot be applied/reverted for some reason (e.g conflict)

Scenario 2 (GIT is not installed, PATCH is not installed)

Check that PATCH is used to apply/revert patches and

• Check that patch cannot be applied/reverted and error message is shown to user that PATCH or GIT is required to apply/revert patches.

Release notes

Unix Patch command is now used to apply patches if GIT is not available.

Associated documentation updates

None

Contribution checklist

• Pull request has a meaningful description of its purpose
• Pull request introduces user-facing changes and includes meaningful updates for any required release notes and documentation changes
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)

[bubasuma]

@NadiyaS this pull request has been moved to #78