Git: Find the most recent common ancestor of two branches.

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To find the most recent common ancestor (also known as the "merge base") of two branches in Git, you can use the git merge-base command. Here's how to do it with an example:

Suppose you have two branches, branch1 and branch2, and you want to find their most recent common ancestor:

bash
# Navigate to the Git repository where you have the branches
cd /path/to/your/repository

# Find the merge base of two branches (e.g., branch1 and branch2)
merge_base=$(git merge-base branch1 branch2)

# Print the hash of the merge base commit
echo "The merge base commit is: $merge_base"

In this example:

  1. You navigate to your Git repository using the cd command.

  2. You use the git merge-base command to find the merge base of branch1 and branch2. The merge-base command returns the commit hash of the most recent common ancestor between the two branches.

  3. You store the commit hash in the merge_base variable.

  4. Finally, you print the hash of the merge base commit to the console.

The $merge_base variable will contain the commit hash of the most recent common ancestor between branch1 and branch2. This is a crucial reference point when working with Git, especially during tasks like merging or rebasing branches, as it represents the starting point where the two branches diverged from each other.

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