Readme.md

Backup repositories

The idea of this script is to backup all repositories from a remote SSH server.

It will search for ´.git´ directories inside the home directory of the "git" user. By default it is the current user, but can be configured by changing the $GIT_USER variable at the top of the script.

All repositories will be cloned into the current working directory.

If there is a previous clone of the repository at the given destination, it will obviously only make a new pull.

backup-repositories.sh

#!/bin/bash

# Address of the server we want to backup from. This does not include the
# user. We assume the user to find the repositories is the current one, and
# the one we clone with is the one specified below
SERVER=example.com
# The user inside whoms directory the repositories are stored
GIT_USER=$(whoami)
# The command that will be execited to find all the repositories
# We search for `*.git` to find bare repositories and `.git` for "usual" 
# repositories.
COMMAND="find /home/$GIT_USER -name \"*.git\" -or -name \".git\" -type d -maxdepth 3"
# Execute the command an get the result
DIRECTORIES=$(ssh $SERVER $COMMAND)

# Now loop through the directories that we found.
for FILE in $DIRECTORIES; do
    # Get the basename of the path (only the name of the directory)
    BASENAME=$(basename $FILE);

    # If the basename is `.git`, we do have a non bare repository. So we remove
    # the git directory and use the parent one
    if [ "$BASENAME" == ".git" ]; then
        DIRECTORY=$(dirname $FILE)
    # Otherwise the repository ends with a `.git` extension (e.g. `sample.git`)
    # and we can directly use it
    else
        DIRECTORY=$FILE
    fi

    # Build the name of the repository with only the last two components
    NAME=$(basename $(dirname $DIRECTORY))/$(basename $DIRECTORY)
    # Create the repository URL
    REPOSITORY=$GIT_USER@$SERVER:$NAME
    # Build the destination where the repository will be stored
    # This is different then $NAME because we do not want .git in our cloned
    # repository.
    DESTINATION=$(dirname $NAME)/$(basename -s .git $NAME)
    
    echo
    echo "### Working on repository $NAME"

    # If the destination already exists, we want to pull for changes
    if [ -d $DESTINATION ]; then
        echo "Pulling updates"
        # Execute the pull inside a "subshell". Otherwise we would change our
        # current working directory.
        RESULT=$(
            cd $DESTINATION && git pull $REPOSITORY
        )
    # otherwiese we just make a new clone of the repository
    else
        echo "Cloning new repository $NAME"
        RESULT=$(git clone $REPOSITORY $DESTINATION)
    fi

    echo $RESULT | sed "s/^/    /"
done