automation of a common scenario that occurs when dealing with pull request reviews

g.sh

# 1) Pick a branch ($1)
# 2) stash 
# 3) checkout
# 4) updated files from last commit
# 5) commit and push if new edits made
# 6) back to previous branch
# 7) pop stash
g () {

    cd $(git rev-parse --show-toplevel)
    
    echo "" > ~/.g3old
    echo "" > ~/.g3new

    oldStashCount=$(git stash list | wc -l)
    if [ ! -z "$1" ]; then
        git stash
        git checkout $1
    fi

    oldIFS="$IFS"
    IFS='
    '
    IFS=${IFS:0:1}
    options=('done')
    options+=($(git diff --name-only HEAD~1 HEAD))
    IFS="$oldIFS"

    echo ""

    PS3='Select a file to edit:'
    select opt in "${options[@]}"
    do
        case $opt in
            'done') break;;
            *) md5sum $opt >>~/.g3old;vim $opt;md5sum $opt >> ~/.g3new;
        esac
    done

    echo "" 

    old=$(md5sum ~/.g3old | cut -d" " -f1) 
    new=$(md5sum ~/.g3new | cut -d" " -f1)  
    if [ "$old" != "$new" ] ; then

        git add -u
        
        options=("*BUG-FIX*" "*REFACTORING*" "*CONFIG*" "*FEATURE*")

        PS3='Select a commit tag:'
        select opt in "${options[@]}"
        do 
            case $opt in
                *) tag=$opt; break;;
            esac
        done

        read -p 'Create a commit message:' msg

        git commit -m "$tag:$msg"
        git push origin HEAD
    fi
    
    if [ ! -z "$1" ]; then
    
        git checkout -

        newStashCount=$(git stash list | wc -l)

        if [ $newStashCount -gt $oldStashCount ]; then
            git stash pop
        fi
    fi
    
    cd -

}

__git_complete g _git_checkout