rename files based on parent directory

rename-files.sh

#!/bin/bash                                                                                                              
                                                
# change docRoot                                                                         
docRoot=~/src/shakir/                                                                                                    
                                                                                                                         
for semester in */;                                                                                                      
do                                                                                                                       
    semester="${semester%?}"                                                                                             
    cd "$docRoot/$semester/"                                                                               
    for branch in */;                                                                                                    
    do                                                                                                                   
        branch="${branch%?}"                                                                                            
        cd "$docRoot/$semester/$branch/"                                                                                
        for subject in */;                                                                                               
        do                                                                                                               
            subject="${subject%?}"                                                                                      
            cd "$docRoot/$semester/$branch/$subject"                                                                     
            for examdate in */;                                                                                          
            do                                                                                                           
                examdate="${examdate%?}"                                                                                
                cd "$docRoot/$semester/$branch/$subject/$examdate"                                                       
                mv 2.pdf "$semester$branch$subject$examdate.pdf"                                                         
                ls                                                                                                      
            done                                                                                                         
        done                                                                                                             
    done                                                                                                                 
done