[sh] checkout private gist by hash

gist_clone_from_hash.sh

# Function and alias for ~/.bashrc to checkout a private gist by hash

# TRY IT OUT
# checkout this very gist after you copy/pasted this file into your ~/.bashrc
# with this terminal command:
# gist 1343759

# temp dir for checkouts
GIST_DIR=~/gist_tmp                                                                                                                                                                             
                                                                                                                                                                                                
function gist_clone_from_hash() {                                                                                                                                                               
    ghash=$1                                                                                                                                                                                    
    gurl="[email protected]:$ghash.git"                                                                                                                                                       
                                                                                                                                                                                           
#    if ending / is missing, add it                                                                                                                                                             
    if [ ${GIST_DIR: -1} != '/' ]; then                                                                                                                                                         
        GIST_DIR=$GIST_DIR"/"                                                                                                                                                                   
    fi                                                                                                                                                                                          
                                                                                                                                                                                                
# checkout directory                                                                                                                                                                                  
    codir=$GIST_DIR$ghash                                                                                                                                                                       
                                                                                                                                                                                                
# create GIST_DIR if it doesnt exist                                                                                                                                                            
    if [ ! -d $GIST_DIR ]; then                                                                                                                                                                 
        mkdir $GIST_DIR                                                                                                                                                                         
    fi                                                                                                                                                                                          
                                                                                                                                                                                                
# remove old version if exists                                                                                                                                                                  
    if [ -d $codir ]; then                                                                                                                                                                      
        rm -rf $codir                                                                                                                                                                           
    fi                                                                                                                                                                                          
    git clone "$gurl" $codir
# go to checkout dir
    cd $codir                                                                                                                                                                     
}                                                                                                                                                                                               
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
alias gist="gist_clone_from_hash"