This document provides instructions for updating Drupal core using GIT. It explains the difference between major and minor version updates, and outlines the steps to set up a Drupal GIT repository and fetch updates. Major updates (upgrades) involve changing the number before the decimal point in the version, while minor updates (changes after the decimal) can be applied for bug fixes and security patches. The process involves initializing a GIT repo, adding a remote for Drupal core, fetching tags, merging commits to update versions, and pushing changes. Downgrading is also covered with commands like fetch, reset, and force push to roll back to an earlier tag.

1. www.eTechBuddy.com

2. Updating Drupal core in a GIT way
From time to time, there will be minor updates to Drupal
core. If the release is designated as a security update, you
should apply the update as soon as you can. Otherwise,
you may choose to apply the update at any time to
receive the bug fixes it contains. There are also major
release upgrades, these you may want to apply so you
have all the new and powerful features.

3. About Drupal versions
What's the difference? Major versions (upgrade) versus Minor versions (update)
Before you start updating or upgrading your Drupal installation it is important that you know the difference
between a major and a minor version release.
● A major version of Drupal core is represented by the number before the first decimal. For example
Drupal 5.1, Drupal 6.1, and Drupal 7.1 are all different major releases. This is considered an
upgrade.
● A minor version of Drupal core is represented by the decimal. For example, Drupal 7.1, 7.13, and
7.23 are all different minor releases of Drupal 7. This is considered an update.
Here is a solid way for Drupal core update with GIT.

4. Initial repository setup
git init
touch README
git add README
git commit -a -m "Drupal core"

5. Now, we’ll set up the Drupal core remote and
fetch Core’s tag
git remote add core git://drupalcode.org/project/drupal.git
git fetch core

6. Getting the Drupal release tag
No we have pulled all of Core’s history, we need to merge
a commit into our current branch. To do that, we will go
look at the repository browser(http://cgit.drupalcode.
org/drupal) for Drupal Core. You will find the summary,
right below you will find the "Tag". You need to click the
appropriate version for the tag, in next page you will get
"commit id" for update the local code.

7. http://cgit.drupalcode.org/drupal

8. http://cgit.drupalcode.org/drupal

9. Copy the commit hash, go back to your terminal and run this command below:
git merge be00a1ced4104d84df2f34b149b35fb0adf91093
This will merge the 7.39 commit into your current master branch.
And you can push master:
git push origin master

10. Downgrade the drupal version
get fetch core
git reset --hard <tag commit id>
git push --force

11. Thank You :)
aryashree@eTechBuddy.com
Twitter : aryashreep