This shell script is used to update the remote repositories of a local Git repository

update_remotes.sh

#!/bin/bash

# This script updates the remote repositories of a local Git repository. 
# It requires two arguments: the local repository path and the new GitHub URL. 
# The script navigates to the provided repository path. 
# If the directory does not exist, it exits with an error message. 
# It adds a new remote called "github" with the provided GitHub URL. 
# The current "origin" remote is renamed to "bitbucket". 
# The "github" remote is then renamed to "origin".
# The script fetches all updates from the new origin. 
# It then iterates over all branches in the local repository. 
# For each branch, it checks if it was tracking the old "bitbucket" remote. 
# If it was, the script unsets the upstream and sets it to track the new "origin".
# Check if the correct number of arguments is provided

if [ "$#" -ne 2 ]; then
    echo "Usage: $0 <REPO_PATH> <GITHUB_URL>"
    exit 1
fi

# Variables
REPO_PATH=$1
GITHUB_URL=$2
GITHUB_REMOTE="github"
BITBUCKET_REMOTE="bitbucket"

# Ensure you are in the correct repository directory
cd "$REPO_PATH" || { echo "Directory $REPO_PATH not found"; exit 1; }

# Add the new remote
git remote add "$GITHUB_REMOTE" "$GITHUB_URL"
# Rename the remotes
git remote rename origin "$BITBUCKET_REMOTE"
git remote rename "$GITHUB_REMOTE" origin

# Fetch updates from the new origin
git fetch --all

# Update the tracking branches
for branch in $(git branch | sed 's/^..//'); do
  # Get the current upstream of the branch
  current_upstream=$(git for-each-ref --format='%(upstream:short)' refs/heads/"$branch")
  
  # If the branch was tracking 'bitbucket', update it to track 'origin'
  if [[ $current_upstream == bitbucket/* ]]; then
    git branch --unset-upstream "$branch"
    git branch -u origin/"$branch" "$branch"
  fi
done