Git-wip : git stash straight to a dedicated branch

git-wip

#!/bin/sh                                                                                                                                                                                 
# vim: set ft=sh :                                                                  
                                                                                    
if [ $# -ne 1 ]; then                                                               
  echo "List of WIP branches:"                                                      
  git branch|grep -e '^wip_'                                                        
else                                                                                
  if [ -z "$(git ls-files)" ]; then                                                 
    echo "No files to stash in the staging area" >&2                                
    exit 1                                                                          
  fi                                                                                
                                                                                     
  new_branch_name="wip_${1}"                                                        
                                                                                    
  git stash --quiet && \                                                            
  git checkout --quiet -b $new_branch_name && \                                     
  git stash pop --quiet && \                                                        
  git commit --quiet -am "WIP" && \                                                 
  git checkout --quiet -                                              
  echo "Stored files in ${new_branch_name} branch"                                  
fi