A tool for switching git remote repository URL.

git-switch-remote-repo.sh

#!/bin/bash

# Usage
#
#  We assume the link of remote repository is of SSH style like:
#
#    <git-user>@<domain>:<scope>/<project-name>.git
#
#  git-switch-remote-repo <remote-name> full <full-repo-link>
#  git-switch-remote-repo <remote-name> domain <new-domain>
#  git-switch-remote-repo <remote-name> user <new-git-user>
#  git-switch-remote-repo <remote-name> scope <new-scope>
#  git-switch-remote-repo <remote-name> project <new-project-name>
#
# e.g.
#
#  git-switch-remote-repo origin full git@github.com:abc/hello.git
#  git-switch-remote-repo origin domain gitee.com
#  git-switch-remote-repo origin user mygit
#  git-switch-remote-repo origin scope microsoft
#  git-switch-remote-repo origin project typescript
#

REPO_NAME=$1

if [ -z "$REPO_NAME" ]; then

    echo "ERROR: The name of remote repository must be specified."
    exit
fi;

apply_repo() {

    verify_repo $3
    git remote remove $1
    git remote add $1 $3

    if git fetch --all; then

        for i in $(git branch | cut -c 3-);
        do
            if ! git branch -u $REPO_NAME/$i $i; then
                echo "Failed to setup upstream for branchs"
                break;
            fi
        done
    else

        echo "Failed to setup upstream for branchs"
    fi

    echo "Updated repository from ‘$2 to '$3'."
}

verify_repo() {

    THE_USER=$(echo $1 | grep -Po '\w+(?=@)')
    THE_DOMAIN=$(echo $1 | grep -Po '(?<=@).+(?=:)')
    THE_SCOPE=$(echo $1 | grep -Po '(?<=:).+(?=/)')
    THE_PROJECT=$(echo $1 | grep -Po '(?<=/).+(?=\.git)')

    if [ -z "$THE_USER" -o -z "$THE_DOMAIN" -o -z "$THE_SCOPE" -o -z "$THE_PROJECT" ]; then
        echo "ERROR: The repo '$1' is illegal."
        exit
    fi
}

case "$2" in
    "user")
    NEW_USER=$3
    ;;
    "domain")
    NEW_DOMAIN=$3
    ;;
    "scope")
    NEW_SCOPE=$3
    ;;
    "project")
    NEW_PROJECT=$3
    ;;
    "full")
    NEW_FULL=$3
    ;;
    *)
    echo "ERROR: Unknown action '$2'."
    exit
    ;;
esac

if [ -z "$3" ]; then

    echo "ERROR: An argument is required."
    exit
fi;

CUR_REPO=$(git remote -v | grep -P "^$REPO_NAME\t" | grep push | grep -Po '\w+@.+?\.git')

if [ -z "$CUR_REPO" ]; then

    if [ -z "$NEW_FULL" ]; then
        echo "ERROR: No such remote repository, please input a full link."
        exit;
    fi

    apply_repo $REPO_NAME $CUR_REPO $NEW_FULL

    exit;
fi

if [ ! -z "$NEW_FULL" ]; then

    apply_repo $REPO_NAME $CUR_REPO $NEW_FULL
    exit;
fi

verify_repo $CUR_REPO

CUR_USER=$(echo $CUR_REPO | grep -Po '\w+(?=@)')
CUR_DOMAIN=$(echo $CUR_REPO | grep -Po '(?<=@).+(?=:)')
CUR_SCOPE=$(echo $CUR_REPO | grep -Po '(?<=:).+(?=/)')
CUR_PROJECT=$(echo $CUR_REPO | grep -Po '(?<=/).+(?=\.git)')

if [ ! -z "$NEW_USER" ]; then
    CUR_USER=$NEW_USER
fi

if [ ! -z "$NEW_DOMAIN" ]; then
    CUR_DOMAIN=$NEW_DOMAIN
fi

if [ ! -z "$NEW_SCOPE" ]; then
    CUR_SCOPE=$NEW_SCOPE
fi

if [ ! -z "$NEW_PROJECT" ]; then
    CUR_PROJECT=$NEW_PROJECT
fi

NEW_REPO="${CUR_USER}@${CUR_DOMAIN}:${CUR_SCOPE}/${CUR_PROJECT}.git"

if [ "$NEW_REPO" != "$CUR_REPO" ]; then

    apply_repo $REPO_NAME $CUR_REPO $NEW_REPO
else

    echo "Nothing changed"
fi