Downloads all .sh gists for user (current user if not set), into $HOME/bin folder. This script will overwrite all local changes.

gistsync.sh

#!/bin/bash
# Downloads all .sh gists for user into $HOME/bin. 
GUSER=`whoami`
GUSERN=$1
if [ "$GUSERN" != "" ]; then
    GUSER=$GUSERN
    echo $GUSERN > $HOME/.gistuser
fi
if [ -f $HOME/.gistuser ]; then
    GUSER=`cat $HOME/.gistuser`
fi
echo Downloading all shell gists for $GUSER
ALL=`curl -s https://api.github.com/users/$GUSER/gists?per_page=100 | grep raw_url | cut -d: -f2- | grep .sh\" | sed -re "s/\"//g;s/,$//g"`
if [ "${PIPESTATUS[0]}" != "0" ]; then
    echo Failed curl -s https://api.github.com/users/$GUSER/gists with status ${PIPESTATUS[0]}
    exit 1
fi

for U in $ALL; do
    N=`basename $U .sh`
    echo $N...
    if [ ! -d $HOME/bin ]; then
        mkdir $HOME/bin
    fi
    curl -s $U | sed -e 's/\r$//g' >$HOME/bin/$N
    if [ "${PIPESTATUS[0]}" != "0" ]; then
        echo Failed curl -s $U with status ${PIPESTATUS[0]}
        exit 1
    fi
    chmod u+x $HOME/bin/$N
done

ALL=`curl -s https://api.github.com/users/$GUSER/gists?per_page=100 | grep raw_url | cut -d: -f2- | grep .shlink\" | sed -re "s/\"//g;s/,$//g"`
for U in $ALL; do
    LINK=`curl -s -o - $U | sed -e 's/\r$//g'`
    if [ "${PIPESTATUS[0]}" != "0" ]; then
        echo Failed curl -s -o - $U with status ${PIPESTATUS[0]}
        exit 1
    fi
    N=`basename $U .shlink`
    echo "$N (shlink)..."
    if [ ! -d $HOME/bin ]; then
        mkdir $HOME/bin
    fi
    curl -s $LINK | sed -e 's/\r$//g' >$HOME/bin/$N
    if [ "${PIPESTATUS[0]}" != "0" ]; then
        echo Failed curl -s $LINK with status ${PIPESTATUS[0]}
        exit 1
    fi
    chmod u+x $HOME/bin/$N
done

Quick bootstrap:

1. Fork to your gists

2. Using your raw gistsync url, execute:

   curl -so - https://gist.githubusercontent.com/huksley/7255147/raw/gistsync.sh | bash -s - USERNAME

3. Add $HOME/bin to $PATH and relogin

   echo export PATH=$HOME/bin:$PATH >> .bashrc

First time will be running using my gistsync, all other time will be running your gistsync copy.
Gistsync and all your gists will be downloaded to $HOME/bin