Git Squash

git-squash.sh

#!/usr/bin/env bash
# This will receive arguments of number of commits to squash
# and use the earliest commit message as the new commit message

# Function to show usage
show_usage() {
    echo "Usage: ./git-squash.sh <number_of_commits>"
    echo "Example: ./git-squash.sh 3"
    exit 1
}

# Get the number of commits to squash
# Check if number of commits is provided
if [ $# -ne 1 ] || ! [[ $1 =~ ^[0-9]+$ ]]; then
    show_usage
fi

NUM_COMMITS=$1

# Get the earliest commit message from the last $NUM_COMMITS commits
EARLIEST_COMMIT_MESSAGE=$(git log --format=%B -n 1 HEAD~$(($NUM_COMMITS-1)))

# Create a temp file for the rebase command
TEMP_FILE=$(mktemp)

# Use reset instead of rebase
git reset --soft HEAD~$NUM_COMMITS

git commit -m "$EARLIEST_COMMIT_MESSAGE"

echo "Successfully squashed last $NUM_COMMITS commits using the message: $EARLIEST_COMMIT_MESSAGE"