#! /bin/bash
##
##  pdfnup: A shell program to generate a "n-up" version of a PDF file
##
##  Author David Firth (http://www.warwick.ac.uk/go/dfirth)
##
version=1.20
echo "This is pdfnup version ""$version"
##
##  Relies on pdflatex and the 'pdfpages' package (version 0.2e 
##  or later).
##
#######################################################################
##  CONFIGURATION: change this block as necessary
##
##  THESE SETTINGS WILL BE OVER-RIDDEN by any found at 
##     /etc/pdfnup.conf
##     /usr/share/etc/pdfnup.conf
##     /usr/local/share/pdfnup.conf
##     /usr/local/etc/pdfnup.conf
##     ~/.pdfnup.conf
##  (which are read in that order)
##  
##  First say where your "pdflatex" program lives:
##
pdflatex="/usr/bin/pdflatex"
#pdflatex="pdflatex.exe"    ## this for Windows computers
##
##  Next a permitted location for temporary files on your system:
##
tempfileDir="/var/tmp" ## /var/tmp is standard on many unix systems
#tempfileDir="C:/tmp"  ## use something like this under Windows
##
##  Now specify the default settings for pdfnup:
##
frame=false            ## do not print a thin border around pages
nup=2x1                ## two logical pages side by side
paper=a4paper          ## alternatives are other LaTeX paper sizes
orient=auto            ## alternatives are landscape and portrait
pages=all
turn=true              ## landscape pages are landscape-oriented
noautoscale=false      ## scale logical pages to fit
column=false           ## don't use column-major ordering
columnstrict=false     ## (see the pdfpages manual)
delta="0 0"            ## no space between logical pages
offset="0 0"           ## output centred on physical page
trim="0 0 0 0"         ## don't trim the logical pages
scale=1.0              ## don't scale the resultant pages
openright=false        ## don't insert blank page at front of document
tidy=true              ## delete all temporary files immediately
##
##  END OF CONFIGURATION
#######################################################################
##
##  Read the configuration file(s) if such exist:
##
for d in /etc /usr/share/etc /usr/local/share /usr/local/etc
do if test -f $d/pdfnup.conf; then
     echo "Reading site configuration from $d/pdfnup.conf"
     source $d/pdfnup.conf
   fi 
done
if test -f ~/.pdfnup.conf; then 
   echo "Reading user defaults from ~/.pdfnup.conf";
   source ~/.pdfnup.conf; 
fi
#######################################################################
##
##  Define the output of "pdfnup --help"
##
helptext="
Usage: pdfnup args
where args must include source pdf filename(s) and optionally also
* a specification, such as --nup 2x1 (two pages side by side)
                           --nup 1x2 (two pages stacked vertically)
                           --nup 2x2  etc 
  (in general mxn, where m and n are single-digit integers)
* a list or range of pages to be included, for example
                           --pages 3-6
                           --pages 2,8,4,5
                           --pages all
* a LaTeX papersize, for example --paper a4paper
                                 --paper letterpaper
* the output page orientation, one of --orient landscape
                                      --orient portrait
                                      --orient auto
  (""auto"" guesses orientation; in the case of --nup 2x2,
  --nup 3x3, etc., ""auto"" produces output pages the same size
  as the logical pages being n-upped.)
* one of --frame true 
         --frame false 
  according to whether or not a thin line is required around pages
* a page-trimming specification such as
         --trim \"1cm 1cm 1cm 1cm\"
  (Note that trimming does not mix well with --frame true.)
* an \"offset\" specification such as
         --offset \"1cm 0.5cm\"
  to offset the position of output pages (see the pdfpages manual)
* a \"delta\" specification such as
         --delta \"1cm 1cm\"
  to put space between logical pages (see the pdfpages manual)
* a \"scale\" specification such as
         --scale 0.91
  to scale the output up or down in size (decrease or increase margins)
* one of --openright true
         --openright false
  according to whether or not a blank page should be inserted before 
  the first logical page
* one of --turn true
         --turn false
  according to whether or not landscape pages should be displayed in
  landscape orientation
* one of --noautoscale true
         --noautoscale false
  for scaling of logical pages to fit (or not)
* one of --column true
         --column false
  according to whether or not column-major order should be used
* one of --columnstrict true
         --columnstrict false
  for whether or not the *last* page should be column-major ordered
  regardless of how full it is
* a specific name for the output file, e.g. --outfile my2up.pdf
* one of --tidy true
         --tidy false
  according to whether or not temporary files should be deleted immediately.
  If --tidy false is used, such files are left in $tempfileDir.

Default arguments for you at this site are
  --frame $frame --nup $nup --paper $paper --orient $orient --pages $pages --trim \"$trim\" --delta \"$delta\" --offset \"$offset\" --scale $scale --turn $turn --noautoscale $noautoscale --openright $openright --column $column --columnstrict $columnstrict --tidy $tidy

For information and version history see http://www.warwick.ac.uk/go/pdfjam
"
##
##  Check that necessary LaTeX packages are installed
##
PATH=`dirname "$pdflatex"`:$PATH
export PATH
case `kpsewhich pdfpages.sty` in
	"") echo "pdfnup: pdfpages.sty not installed"; exit 1;;
esac
case `kpsewhich eso-pic.sty` in
	"") echo \
	    "pdfnup: eso-pic.sty not installed (see the pdfpages manual)"
	    exit 1;;
esac
case `kpsewhich everyshi.sty` in
	"") echo \
	    "pdfnup: everyshi.sty not installed (see the pdfpages manual)"
	    exit 1;;
esac
##
##  Now do the argument loop...
##
sourcePath=
outFile=
inFiles=0
newline='
'
while test -n "${1}"; do
  case "${1}" in
  	*.pdf|*.PDF) inFiles=`expr $inFiles + 1`;
  	       sourcePath="$sourcePath$newline${1}";;
  	--help) echo "$helptext";
            exit 0;;
    --pages) pages="${2}"
  	         shift;;
  	--outfile) outFile="${2}" 
  	           case "$outFile" in
  	           	*".pdf");;
  	           	*) echo "pdfnup: outfile name must end in .pdf"; 
  	           	   exit 1;;
  	           esac
  	           shift;;
  	--nup) nup="${2}"
  	       shift;;
  	--frame) frame="${2}"
  	         shift;;
  	--paper) paper="${2}"
  	         shift;;
  	--orient) orient="${2}"
  	          shift;;
  	--trim) trim="${2}"
  	          shift;;
  	--delta) delta="${2}"
  	          shift;;
  	--offset) offset="${2}"
  	          shift;;
  	--scale) scale="${2}"
  	          shift;;
  	--turn) turn="${2}"
  	          shift;;
  	--noautoscale) noautoscale="${2}"
  	          shift;;
  	--openright) openright="${2}"
  	          shift;;
  	--column) column="${2}"
  	          shift;;
  	--columnstrict) column="${2}"
  	          shift;;
  	--tidy) tidy="${2}"
  	        shift;;
  	*) echo "pdfnup: unrecognised argument ${1}"; exit 1;;
  esac
  shift
done
if test $inFiles -gt 1 ; then
  if test "$outFile" != "" ; then
    echo "pdfnup: --outfile cannot be used with multiple input files"; 
    echo "pdfnup: no files processed"
    exit 1;
  fi
fi
case "$sourcePath" in
  "") echo "pdfnup: no pdf source file specified
For information on usage try \"pdfnup --help\""; exit 1;;
esac
OIFS=IFS
IFS="$newline"
for k in $sourcePath
do
  if test -f "$k"; then :; 
    else echo "pdfnup: ""$k"" does not exist, no files were processed"; 
    exit 1;
  fi
done
IFS=OIFS
case $pages in
	all) pages=-;;
	*) pages={$pages};;
esac
##
##  That's the arguments done.
##
##  Next sort out paper orientation, if not specified
##
x=`echo $nup | sed 's/..$//'`
y=`echo $nup | sed 's/^..//'`
fitpaper=false  ## the normal setting
case $orient in
	auto) fitpaper=true  ## used only for 2x2, 3x3 etc.
	      if test "$x" -gt "$y"
          then orient=landscape ; fitpaper=false
          fi
          if test "$y" -gt "$x"
          then orient=portrait ; fitpaper=false
          fi;;
esac
pwd=`pwd | sed 's/ /\\ /'`
IFS="$newline"
##
##  Now work on the input file (or files in turn)
##
counter=0
for inFile in $sourcePath
do
  echo "Processing $inFile..."
  counter=`expr $counter + 1`
  cd "$pwd"
  pdfName=`basename "$inFile"`
  sourceDir=`dirname "$inFile"` ; cd "$sourceDir" ; sourceDir=`pwd`
  sourceFullPath="$sourceDir"/"$pdfName"
  cd "$pwd"
  case "$outFile" in
	  "") ## no --outfile argument supplied
	      outfileNameRoot=`echo "$pdfName" | sed 's/\.pdf$//i'`-$nup;
	      outfileDir="$sourceDir";
	      outFile="$outfileNameRoot"".pdf";;
	   *) ## --outfile argument was supplied
	      outfileNameRoot=`basename "$outFile" | sed 's/\.pdf$//i';`
	      outfileDir=`dirname "$outFile"` ; 
	      cd "$outfileDir" ; 
	      outfileDir=`pwd` ;;
  esac
  case "$outfileDir"/"$outfileNameRoot"".pdf" in
    $sourceFullPath) echo "pdfnup: outfile and source cannot be the same";
  	            exit 1;;
    //"$outfileNameRoot"".pdf") outfileDir="";;  ## in case of output 
  esac                                           ## to the root directory!
  ##
  ##  Now edit the temporary LaTeX input file
  ##
  uniqueName="$RANDOM$RANDOM$RANDOM"-"$counter"
  ln -s "$sourceFullPath" "$tempfileDir"/"$uniqueName"source.pdf
  texFile="$tempfileDir"/"$uniqueName".tex
  msgFile="$tempfileDir"/"$uniqueName".msgs
  (sed s*pdfname*"$tempfileDir"/"$uniqueName"source.pdf* <<EndTemplate
\documentclass[papersize,orientation]{article}
\usepackage{pdfpages}
\begin{document}
\includepdf[pages=,nup=,frame=,fitpaper=,trim=,delta=,offset=,scale=,turn=,noautoscale=,column=,columnstrict=,openright=]{pdfname}
\end{document}
EndTemplate
) \
    | sed 's/^[^b]egin/\\begin/' \
    | sed s/pages=/pages="$pages"/ \
    | sed s/nup=/nup="$nup"/ \
    | sed s/frame=/frame="$frame"/ \
    | sed s/fitpaper=/fitpaper="$fitpaper"/ \
    | sed s/trim=/trim="$trim"/ \
    | sed s/delta=/delta="$delta"/ \
    | sed s/offset=/offset="$offset"/ \
    | sed s/scale=/scale="$scale"/ \
    | sed s/turn=/turn="$turn"/ \
    | sed s/noautoscale=/noautoscale="$noautoscale"/ \
    | sed s/openright=/openright="$openright"/ \
    | sed s/column=/column="$column"/ \
    | sed s/columnstrict=/columnstrict="$columnstrict"/ \
    | sed s/papersize/"$paper"/ \
    | sed s/orientation/"$orient"/ > $texFile
  echo "  Temporary LaTeX file for this job is ""$texFile"
  ##
  ##  Now run pdflatex and tidy up
  ##
  echo "  Calling pdflatex..."
  cd "$tempfileDir"
  "$pdflatex" --interaction batchmode "$texFile" > "$msgFile"
  if test -f "$tempfileDir"/"$uniqueName"".aux";  
        ## ie if LaTeX didn't choke
    then if cp "$tempfileDir"/"$uniqueName".pdf \
               "$outfileDir"/"$outfileNameRoot"".pdf"
         then echo "  Finished: output is"\
                   "$outfileDir"/"$outfileNameRoot"".pdf"
         fi
         case "$tidy" in
           true) rm "$tempfileDir"/"$uniqueName"* ;;
         esac
         outFile=""
    else echo "  Failed: output file not written"
  fi 
done
IFS=OIFS