Shell Programming and Scripting

#!/bin/sh
cd dist
for a in `ls`; do
   
   if [ ! -f "../dist_old/$a" ]; then
       continue
   fi
   diff $a ../dist_old/$a > /dev/null
   if [[ "$?" == "1" ]]; then
      cp $a ../dist_upgrade
   fi
done

new=/dist
old=/dist_old
diff=/dist_upgrade

cd $new
for f in *f
do
# Diff the files - ignore the output...
    diff $f $old > /dev/null 2>&1
# ...but get the status
    status=$?
    if [ $status -eq 0 ] ; then
# Files are identical - don't copy the file
        echo $f unchanged
    elif [ $status -eq 1 ] ; then
# Files differ - copy new file
        echo $f changed
        cp $f $diff
    elif [ $status -eq 2 ] ; then
# Old file doesn't exist - copy new file
        echo old $f does not exist
        cp $f $diff
    fi
done

#!/bin/bash

# setup folders for our different stages
DIST=/var/www/localhost/htdocs/dist/
DIST_OLD=/var/www/localhost/htdocs/dist_old/
DIST_UPGRADE=/var/www/localhost/htdocs/dist_upgrade/

cd $DIST

list=`find . -type f`

for a in $list; do
   if [ ! -f "$DIST_OLD$a" ]; then
        cp --parents $a $DIST_UPGRADE
      continue
   fi
   diff $a $DIST_OLD$a > /dev/null
   if [[ "$?" == "1" ]]; then
        # File exists but is different so copy changed file
        cp --parents $a $DIST_UPGRADE
   fi
done

#!/bin/bash

# setup folders for our different stages
DIST=/var/www/localhost/htdocs/dist/
DIST_OLD=/var/www/localhost/htdocs/dist_old/
DIST_UPGRADE=/var/www/localhost/htdocs/dist_upgrade/

cd $DIST

find . -type f | while read filename
do
   if [ ! -f "$DIST_OLD$filename" ]; then
        cp --parents "$filename" $DIST_UPGRADE
      continue
   fi
   diff "$filename" "$DIST_OLD$filename" > /dev/null
   if [[ "$?" == "1" ]]; then
        # File exists but is different so copy changed file
        cp --parents $filename $DIST_UPGRADE
   fi
done