script to switch git remote protocol between http/https/ssh

git-remote-protocol-switcher.sh

#!/usr/bin/env bash

set -eo pipefail

if [[ $1 == "" ]]; then
    echo "usage: script.sh target-protocol [remote-name]"
    echo "example: script.sh ssh origin"
    exit
fi
TARGET_PROTOCOL=$1

if [[ $2 == "" ]]; then
    TARGET_REMOTES=$(git remote)
else
    TARGET_REMOTES="${*:2}"
fi

change_remote() {
    local TARGET_PROTOCOL=${1}
    local TARGET_REMOTE=${2}

    # https://regexr.com/52rmj
    # for an explanation on how this regex was created
    REGEX='(git@|https?:\/\/)([A-Za-z0-9\.]+)(:|\/)([^\/]+)(\/)(.*)'
    CURRENT_REMOTE=$(git remote get-url "$TARGET_REMOTE")
    if [[ $CURRENT_REMOTE =~ $REGEX ]]; then
        DOMAIN=${BASH_REMATCH[2]}
        USERNAME=${BASH_REMATCH[4]}
        REPO_NAME=${BASH_REMATCH[6]}
        REPO_PATH=$USERNAME'/'$REPO_NAME
    else
        echo "Invalid remote $CURRENT_REMOTE"
        exit
    fi

    case $TARGET_PROTOCOL in
    ssh)
        NEW_REMOTE="git@$DOMAIN:$REPO_PATH"
        ;;
    http)
        NEW_REMOTE="http://$DOMAIN/$REPO_PATH"
        ;;
    https)
        NEW_REMOTE="https://$DOMAIN/$REPO_PATH"
        ;;
    *)
        echo "Invalid target protocol $TARGET_PROTOCOL"
        exit
        ;;
    esac

    # echo $NEW_REMOTE
    git remote set-url "$TARGET_REMOTE" "$NEW_REMOTE"
    echo "remote $TARGET_REMOTE changed from $CURRENT_REMOTE -> $NEW_REMOTE"
}

for i in ${TARGET_REMOTES}; do
    change_remote "$TARGET_PROTOCOL" "$i"
done

github-update-username.sh

#!/usr/bin/env bash

set -eo pipefail

if [[ $2 == "" ]]; then
    echo "usage: script.sh oldUsername newUsername"
    exit
fi
OLD_USERNAME=$1
NEW_USERNAME=$2

TARGET_REMOTES=$(git remote)

change_username() {

    local TARGET_REMOTE=${1}
    # https://regexr.com/52rmj
    # for an explanation on how this regex was created
    REGEX='([git@|https?:\/\/]+[A-Za-z0-9\.]+.[:|\/])([^\/]+)[\/](.*)'
    CURRENT_REMOTE=$(git remote get-url "$TARGET_REMOTE")
    if [[ $CURRENT_REMOTE =~ $REGEX ]]; then
        PRELUDE=${BASH_REMATCH[1]}
        USERNAME=${BASH_REMATCH[2]}
        REPO_NAME=${BASH_REMATCH[3]}
    else
        echo "Invalid remote $CURRENT_REMOTE"
        exit
    fi

    if [[ $USERNAME == "$OLD_USERNAME" ]]; then
        NEW_REMOTE=$PRELUDE$NEW_USERNAME'/'$REPO_NAME
        git remote set-url "$TARGET_REMOTE" "$NEW_REMOTE"
        echo "remote $TARGET_REMOTE changed from $CURRENT_REMOTE -> $NEW_REMOTE"
    fi
}

for i in ${TARGET_REMOTES}; do
    change_username "$i"
done