Switch git branches by number

git_branching.sh

# Get all branch names
all_branches=`git for-each-ref --shell \
--format='%(refname:strip=2)' refs/heads | \
cut -d "'" -f 2`

# Print branch names with assigned number
arr=($all_branches)

# Assigned number is branch's actual index + 1
idx=1
for branch in ${arr[@]}; do
  echo $idx $branch
  ((idx++))
done

# User picks branch by number or enters new
echo Enter branch number or 0 to create a branch:
read number

# Create new branch with given name and switch to it
if [ "$number" == 0 ]; then
  echo "Enter branch name"
  read new_name
  echo "Creating new branch $new_name"
  git checkout -b "$new_name"
  exit
fi

# Switch to branch picked if valid and exit
if [ ${arr["$number - 1"]} ]; then
  echo Switching to ${arr["$number - 1"]}
  git checkout ${arr["$number - 1"]}
  exit
fi

echo Branch number "$number" not found

# Start backup flow to pick branch by name
echo Enter branch name:
read name

echo Switching to "$name"

# Get branch that matches the name
matching_branch=`git for-each-ref --shell \
--format='%(refname:strip=2)' refs/heads | \
grep "\${name}\>" | cut -d "'" -f 2`

# Switch to branch if it exists and exit
if [ "$matching_branch" ]; then
  git checkout "$matching_branch"
  exit
fi

# Create new branch flow
echo No branch named "$name" found
echo "Create new branch named $name? (y/n)"
read answer

if [ "$answer" == 'y' ]; then
  echo Creating new branch "$name"
  git checkout -b "$name"
fi

exit