diffsrc

#!/bin/bash

if [ $# -ne 2 ]; then
  echo "Usage: $0 orig-dir new-dir"
  echo "  Determines source code changes between branches"
  exit 0
fi

old=$1
new=$2

if [ ! -d $old/src ]; then
  echo "Cannot find src/ directory under $old"
  exit 1
fi

if [ ! -d $new/src ]; then
  echo "Cannot find src/ directory under $new"
  exit 1
fi

oldsrc=$old/src
newsrc=$new/src

echo "======================================================================"
echo "Removed files (number of lines):"
echo "======================================================================"

remtotal=0
oldlines=0

for DIR in Apps Engines ExprLib Formlsms FuncLib Modules Options ParseICP ParseSM Streams SymTabs; do
  
  for oldf in $oldsrc/$DIR/*; do
    if [ ! -f $oldf ]; then
      continue
    fi
    l=`cat $oldf | wc -l`
    oldlines=$[ oldlines + l ]
    bf=`basename $oldf`
    if [ ! -f $newsrc/$DIR/$bf ]; then
      remtotal=$[ remtotal + l ]
      printf "%8d %s\n" $l $DIR/$bf
    fi
  done

done

echo "======================================================================"
echo "Changed files (diff size):"
echo "======================================================================"

chtotal=0

for DIR in Apps Engines ExprLib Formlsms FuncLib Modules Options ParseICP ParseSM Streams SymTabs; do
  
  for oldf in $oldsrc/$DIR/*; do
    if [ ! -f $oldf ]; then
      continue
    fi
    bf=`basename $oldf`
    newf="$newsrc/$DIR/$bf"
    if [ -f $newf ]; then
      l=`diff $oldf $newf | wc -l `
      if [ $l -gt 0 ]; then
        chtotal=$[ chtotal + l ]
        printf "%8d %s\n" $l $DIR/$bf
      fi
    fi
  done

done

echo "======================================================================"
echo "Added files (number of lines):"
echo "======================================================================"

addtotal=0
newlines=0

for DIR in Apps Engines ExprLib Formlsms FuncLib Modules Options ParseICP ParseSM Streams SymTabs; do
  
  for newf in $newsrc/$DIR/*; do
    if [ ! -f $newf ]; then
      continue
    fi
    l=`cat $newf | wc -l`
    newlines=$[ newlines + l ]
    bf=`basename $newf`
    if [ ! -f $oldsrc/$DIR/$bf ]; then
      addtotal=$[ remtotal + l ]
      printf "%8d %s\n" $l $DIR/$bf
    fi
  done

done

echo "======================================================================"
echo "Summary:"
echo "======================================================================"

echo "Old src: $oldlines"
echo "REMOVED: $remtotal"
echo "CHANGED: $chtotal"
echo "ADDED  : $addtotal"
echo "New src: $newlines"