#!/bin/bash
#
# Script to compare scaladoc raw files. For an explanation read the next echos.
#

if [ $# -ne 2 ]
then
  echo
  echo "scaladoc-compare will compare the scaladoc-generated pages in two different locations and output the diff"
  echo "its main purpose is to track changes to scaladoc and prevent updates that break things."
  echo
  echo "This script is meant to be used with the scaladoc -raw-output option, as it compares .html.raw files "
  echo "instead of markup-heavy .html files."
  echo
  echo "Script usage $0 <new api files path> <old api files path>"
  echo "   eg: $0 build/scaladoc/library build/scaladoc-prev/library | less"
  echo 
  exit 1
fi

NEW_PATH=$1
OLD_PATH=$2

FILES=`find $NEW_PATH -name '*.html.raw'`
if [ "$FILES" == "" ]
then
  echo "No .html.raw files found in $NEW_PATH!"
  exit 1
fi

for NEW_FILE in $FILES
do
  OLD_FILE=${NEW_FILE/$NEW_PATH/$OLD_PATH}
  if [ -f $OLD_FILE ]
  then
    #echo $NEW_FILE" => "$OLD_FILE
    DIFF=`diff -q -w $NEW_FILE $OLD_FILE 2>&1`
    if [ "$DIFF" != "" ]
    then
      # Redo the full diff
      echo "$NEW_FILE:"
      diff -w $NEW_FILE $OLD_FILE 2>&1
      echo -e "\n\n"
    fi
  else
    echo -e "$NEW_FILE: No corresponding file (expecting $OLD_FILE)\n\n"
  fi
done

echo Done.