New functionality added. The added functionality allows for two different actions, depending on the state of the repository: Cloning non-existent repositories - Pulling existing repositories.

download-all-repos.sh

#!/bin/bash

#To run the script in the folder where we want the new repositories from a user to be downloaded, or alternatively, to be updated.

if [ $# -eq 0 ]
  then
    echo "Usage: $0 <user_name> "
    exit;
fi

USER=$1
REPOS_LIST=$(curl -s https://api.github.com/users/$USER/repos?per_page=1000 |grep clone_url |awk '{print $2}'| sed 's/"\(.*\)",/\1/')

for repo in $REPOS_LIST;do

repo_name=${repo%.git}
repo_name=${repo_name#https://github.com/$USER/}

if [ -d "$repo_name" ];
  then
    cd $repo_name;
    git pull;
    cd ..
  else
    git clone $repo;
fi

done;