The `comparepdf.sh` script no longer relies on bash.

test/mu/comparepdf.sh

-#!/bin/bash
+#!/bin/sh
 # This script visually compares two PDF documents on a page-by-page basis.
 
 # Print an error message and die.
 die() {
-  printf "$1\n" "${@:2}" 1>&2
+  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"
+  [ -e "$1" ] || die 'File "%s" does not exist.' "$1"
 }
 
 # Check that the input files exist.
@@ -24,20 +25,21 @@ DEST_DIR=`mktemp -d` && trap 'rm -r $SOURCE_DIR $DEST_DIR' EXIT &&
 
 # Compare the individual pages.
 DIFFER=false; PAGES=""
-while read PAGE; do
-  if [[ -e $SOURCE_DIR/$PAGE  && ! -e $DEST_DIR/$PAGE ]]; then
+for PAGE in `((cd $SOURCE_DIR && ls *.pdf) && (cd $DEST_DIR && ls *.pdf)) | sort -u`; do
+  if [ -e $SOURCE_DIR/$PAGE -a ! -e $DEST_DIR/$PAGE ]; then
     die 'The document "%s" does not contain page "%d".' "$1" "${PAGE%%.pdf}"
-  elif [[ ! -e $SOURCE_DIR/$PAGE && -e $DEST_DIR/$PAGE ]]; then
+  elif [ ! -e $SOURCE_DIR/$PAGE -a -e $DEST_DIR/$PAGE ]; then
     die 'The document "%s" does not contain page "%d".' "$2" "${PAGE%%.pdf}"
   else
     if ! comparepdf --compare=appearance --verbose=0 $SOURCE_DIR/$PAGE $DEST_DIR/$PAGE; then
       DIFFER=true
-      PAGES="$PAGES ${PAGE%%.pdf}"
+      PAGES="$PAGES, `echo ${PAGE%%.pdf} | sed 's/^0*//'`"
     fi
   fi    
-done < <(((cd $SOURCE_DIR && ls *.pdf) && (cd $DEST_DIR && ls *.pdf)) | sort -u)
+done
 
 # Print out the result.
 if $DIFFER; then
-  die 'The documents "%s" and "%s" differ in pages%s.' "$1" "$2" "$PAGES"
+  PAGES="$(echo "$PAGES" | tail -c+3)"
+  die 'The documents "%s" and "%s" differ in pages %s.' "$1" "$2" "$PAGES"
 fi