Updated the tests.

#!/bin/sh

# This script visually compares two PDF documents on a page-by-page basis.

# Print an error message and die.

die() {

  FORMAT="$1"; shift

  printf "$FORMAT\n" "$@" 1>&2

  exit 1

}

# Check if a file exist.

exists() {

  [ -e "$1" ] || die 'File "%s" does not exist.' "$1"

}

# Check that the input files exist.

exists "$1" || exit 1

exists "$2" || exit 1

# Burst the input files into temporary directories.

SOURCE_DIR=`mktemp -d` && trap 'rm -r $SOURCE_DIR' EXIT &&

  pdftk "$1" burst output $SOURCE_DIR/%04d.pdf

DEST_DIR=`mktemp -d` && trap 'rm -r $SOURCE_DIR $DEST_DIR' EXIT &&

  pdftk "$2" burst output $DEST_DIR/%04d.pdf

# Compare the individual pages.

DIFFER=false; PAGES=""

for PAGE in `((cd $SOURCE_DIR && ls *.pdf) && (cd $DEST_DIR && ls *.pdf)) | sort -u`; do

  PAGENUM=`echo ${PAGE%%.pdf} | sed 's/^0*//'`

  if [ -e $SOURCE_DIR/$PAGE -a ! -e $DEST_DIR/$PAGE ]; then

    die 'The document "%s" does not contain page "%d".' "$2" $PAGENUM

  elif [ ! -e $SOURCE_DIR/$PAGE -a -e $DEST_DIR/$PAGE ]; then

    die 'The document "%s" does not contain page "%d".' "$1" $PAGENUM

  else

    if ! comparepdf --compare=appearance --verbose=0 $SOURCE_DIR/$PAGE $DEST_DIR/$PAGE; then

      DIFFER=true

      PAGES="$PAGES, $PAGENUM"

    fi

  fi    

done

# Print out the result.

if $DIFFER; then

  PAGES="$(echo "$PAGES" | tail -c+3)"

  die 'The documents "%s" and "%s" differ in pages %s.' "$1" "$2" "$PAGES"

fi

# This target runs a single test.

expected-%.pdf: $(EXAMPLEDIR)/%.pdf

	comparepdf --compare=appearance --verbose=1 $< $@

	../comparepdf.sh $< $@ || \

	{ [ "$(UPDATE_FAILED)" = true ] && mv $< $@; }

# This is a dummy target.

implode: