#!/bin/sh
version=4.00
#########################################################################
##                                                                     ##
##  pdfjam: A shell-script interface to the "pdfpages" LaTeX package   ##
##  ------                                                             ##
##                                                                     ##
##  Author: David Firth (https://warwick.ac.uk/dfirth)                 ##
##  Maintainer: Markus Kurtz                                           ##
##                                                                     ##
##  Usage: see https://github.com/pdfjam/pdfjam                        ##
##         or "pdfjam --help"                                          ##
##                                                                     ##
##  Relies on:                                                         ##
##  -- pdflatex (or xelatex or lualatex)                               ##
##  -- the 'pdfpages' package for LaTeX (ideally version >= 0.4f)      ##
##                                                                     ##
##  License: GPL version 2 or later.  This software comes with         ##
##  ABSOLUTELY NO WARRANTY of fitness for any purpose at all; if you   ##
##  do not accept that, then you must not use it.                      ##
##                                                                     ##
##  The path searched for site-wide configuration files can be set     ##
##  by editing the following variable:                                 ##
##                                                                     ##
    configpath='/etc:/usr/share/etc:/usr/local/share:/usr/local/etc'   ##
##                                                                     ##
##  Nothing else in this file should need to be changed.               ##
##                                                                     ##
#########################################################################
##
##  PRELIMINARIES
##
##  First determine:
##    --- whether verbose commentary should be provided (not if --quiet
##        or --configpath was specified);
##    --- whether this call to pdfjam is a "batch" call;
##    --- whether just the help text is required;
##    --- or whether all configuration files should be ignored.
##
verbose=true
for arg; do
	case $arg in
	--quiet | -q | --configpath)
		verbose=false;;
	--version | -V)
		echo "$version"
		exit 0;;
	--batch)
		batch=true;;
	--vanilla)
		vanilla=true;;
	*) ;;
	esac
done
##
##  Check to see whether this is a "secondary" call to pdfjam:
##
if test -z "$PDFJAM_CALL_NUMBER"; then ## not a secondary call
	PDFJAM_CALL_NUMBER=0
fi
##
##  Keep a copy of the internal file separator, so we can change it safely
##
OIFS="$IFS"
##
##  Record the full filename of the current working directory
##
pwd=$(pwd)
##
##  Trap interrupts so that they kill everything:
##
trap 'IFS=$OIFS; exit 1' HUP INT TERM
##
##  The following will be useful for readability of the script:
##
newline='
'
##
##  Functions to massage input
##
##  Use '' to escape string with multiple tricky characters and \ otherwise
enquote() {
	case "$1" in
	*$newline*) escape_quote "$1" ;;
	'' | *)
		if printf %s "$1"|grep -Eq '([	 !"#$&()*<>?\^`{|}~].*){2}'; then
			escape_quote "$1"  ##    ^-- matched twice due to --^
		else
			escape_chars "$1"
		fi
	esac
}
escape_quote() {  ## Put everything in '' and care for actual '
	printf %s "'$(printf %s "$1" | sed "s/'/'\\\\''/g")'"
}
escape_chars() {  ## Prefix tricky characters with \
	printf %s "$1" | sed 's/[	 !"#$&-*;<>?[-^`{|}~]/\\&/g'
}
##  Put argument in {} if necessary for parsing inside a key value list
embrace() {
	value="$1"
	case "$value" in
	\{*\}) ;;
	*,* | *\]*) value="{$value}" ;;
	esac
	printf %s "$value"
}
##  Strip legacy surrounding {}; add bp if no units given
to_papersize() {
	value="$1"
	case "$value" in
		\{*\}) value="${value#\{}"; value="${value%\}}"
	esac
	printf %s "$value" | sed -E 's/([0-9]{1,}\.{0,1}[0-9]*)(,|$)/\1bp\2/g'
}
##
##  Define a function to output verbose comments:
##
prattle() { ## second argument here is non-null for continuation lines
	if test $verbose = true; then
		prefix1="  pdfjam:"
		prefix2=$(printf "%s" "$prefix1" | sed 's/pdfjam:/       /')
		indent=""
		if test "$PDFJAM_CALL_NUMBER" -gt 0 && test "$batch" != true; then
			indent="    "
		fi
		IFS="$newline"
		lineCounter=0
		for line in ${1}; do
			lineCounter=$((lineCounter + 1))
			if test $lineCounter -eq 1 && test ! -n "${2}"; then
				if test -w "$PDFJAM_MESSAGES_FILE"; then
					printf "$prefix1$indent %s\n" "$line" >> \
						"$PDFJAM_MESSAGES_FILE"
				else
					messages="$messages$prefix1$indent $line$newline"
					## msg file not made yet
				fi
			else
				if test -w "$PDFJAM_MESSAGES_FILE"; then
					printf "$prefix2$indent %s\n" "$line" >> \
						"$PDFJAM_MESSAGES_FILE"
				else
					messages="$messages$prefix2$indent $line$newline"
					## msg file not made yet
				fi
			fi
		done
		IFS="$OIFS"
	fi
	return
}
##
##  And here's the first piece of verbose commentary:
##
prattle "----" 1
prattle "This is pdfjam version ${version}."
##
#########################################################################
##
##  CONFIGURATION
##
##  THESE SETTINGS WILL BE OVERRIDDEN by any found in configuration
##  files.  By default such files are found at any or all of
##     /etc/pdfjam.conf
##     /usr/share/etc/pdfjam.conf
##     /usr/local/share/pdfjam.conf
##     /usr/local/etc/pdfjam.conf
##     $HOME/.pdfjam.conf
##  (And they are read in that order; if a setting is made more than
##  once, the last instance prevails.)
##
##  An example configuration file can be found at
##     https://github.com/pdfjam/pdfjam
##
##  The path searched for site-wide configuration files can be changed
##  by editing the variable 'configpath' at the top of this file.
##
##
##  First get the full path (if it exists) to pdflatex:
##
latex=$(command -v pdflatex)
if [ -z "$latex" ]; then latex="not found"; fi
##
##  Likewise for the pdfinfo and iconv (only needed for `--keepinfo'):
##
pdfinfo=$(command -v pdfinfo)
if [ -z "$pdfinfo" ]; then pdfinfo="not found"; fi
iconv=$(command -v iconv)
if [ -z "$iconv" ]; then iconv="not found"; fi
##
##
##  Defaults
##
outFile="$pwd"      ##  Output to the current working directory
suffix=pdfjam       ##  Default filename suffix to be used when
##                      --outfile is either (a) a directory, or (b)
##                      not specified in a --batch call.
checkfiles=         ##  Don't use the Unix 'file -Lb' utility to
##                      identify PDF files from their contents;
##                      rely on the .pdf or .PDF extension instead.
keepinfo=           ##  Don't try to preserve "pdfinfo" data
landscape=          ##  Use portrait./Do not switch width and height.
twoside=            ##  No "twoside" option to documentclass
tidy=tidy           ##  Delete all temporary files at the end
runs=1              ##  Run latex just once
builddir=           ##  Directory to use instead of temporary one
enc=                ##  Have `iconv` guess command line encoding
preamble=           ##  Default LaTeX preamble string.
##  END OF SETTINGS MADE DIRECTLY WITHIN THE SCRIPT
##
##  Now read the site's or user's configuration file(s) if such exist,
##  unless '--vanilla' was specified.
##
configpath="$configpath:${XDG_CONFIG_HOME:-$HOME/.config}"
if test "$vanilla" != true; then
	if test "$PDFJAM_CALL_NUMBER" = 0; then ## not a secondary call to pdfjam
		configFiles=$(printf "%s" "$configpath" |
			sed 's/:/\/pdfjam.conf:/g; s/$/\/pdfjam.conf/')
		configFiles="${configFiles}:$HOME/.pdfjam.conf"
		PDFJAM_CONFIG=""
		prattle "Reading any site-wide or user-specific defaults..."
		IFS=':'
		for d in $configFiles; do
			if test -f "$d"; then
				change=$(sed '/^ *#.*/d ; s/ *#.*//; s/^ *//' "$d")
				comment="## ${newline}## From ${d}: ${newline}##"
				PDFJAM_CONFIG="$PDFJAM_CONFIG$comment$newline$change$newline"
			fi
		done
		IFS="$OIFS"
		PDFJAM_CONFIG=$(printf "%s" "$PDFJAM_CONFIG" | sed 's/^/    /')
		if test "$batch" = true; then export PDFJAM_CONFIG; fi
		if test -z "$PDFJAM_CONFIG"; then
			prattle "(none found)" 1
		else
			prattle "$PDFJAM_CONFIG" 1
		fi
	fi
	if test -n "$PDFJAM_CONFIG"; then eval "$PDFJAM_CONFIG"; fi
else
	if test "$PDFJAM_CALL_NUMBER" -eq 0; then
		prattle "Called with '--vanilla': no user or site configuration"
		prattle "files will be read." 1
	fi
fi
if [ -n "$paper" ] && [ -n "$papersize" ]; then
	prattle "Both paper and papersize configured, ignoring papersize" 1
	papersize=
fi
## For backwards compatibility, check here for a $pdflatex setting in the config file
if [ -n "${pdflatex:-}" ]; then latex="$pdflatex"; fi
##
##  If paper size is not set, get default paper size from libpaper if
##  possible, otherwise guess A4.
##
paperformats=:a0:a1:a2:a3:a4:a5:a6:b0:b1:b2:b3:b4:b5:b6:c0:c1:c2:c3:c4:c5:c6\
:ansia:ansib:ansic:ansid:ansie:letter:legal:executive:b0j:b1j:b2j:b3j:b4j:b5j:b6j:
to_paper() {
	printf %s "$1"|grep -q '^[A-Za-z0-9]*$' || return 2 # make sure input is harmless
	paper=$(echo "$1" | tr A-Z a-z)
	paper=${paper%paper}
	echo $paperformats|grep -q ":$paper:" || return 1
	case $paper in
	b?j) ;;
	*) paper="$paper"paper
	esac
	echo "$paper"
}
paperspec=
if test -z "$paper"; then
	if command -v paper >/dev/null; then  ## provided by libpaper>=2
		paperspec=$(paper)
		if echo "$paperspec" | grep -q ': '; then
			if ! paper=$(to_paper "${paperspec%%: *}"); then
				paperdimensions=$(echo "$paperspec" | cut -f 2 -d " ")
				paperunit=$(echo "$paperspec" | cut -f 3 -d " ")
				if test "$paperunit" = "pt"; then paperunit=bp; fi
				paperwidth=$(echo "$paperdimensions" | cut -f 1 -d "x")
				paperheight=$(echo "$paperdimensions" | cut -f 2 -d "x")
				papersize="$paperwidth$paperunit,$paperheight$paperunit"
			fi
		else
			prattle "The 'paper' program seems not to be working; not using it" 1
		fi
	fi
	if test -z "$paper$papersize"; then
		if command -v paperconf >/dev/null; then  ## provided by libpaper>=1
			paper=$(to_paper "$(paperconf)") \
				|| papersize=$(paperconf -s \
				| sed -nE '1s/^([0-9]*(\.[0-9]+)?) ([0-9]*(\.[0-9]+)?)$/\1bp,\3bp/p')
		fi  ## the above did not work
		if test -z "$paper$papersize"; then
			paper='a4paper' ## fallback paper size is ISO A4
			papersize=''    ## clear papersize
		fi
	fi
fi
##
##  END OF CONFIGURATION BLOCK
##
#########################################################################
##
##  HELP TEXT
##
##  Defines the output of 'pdfjam --help'
##
helptext="
pdfjam is a shell-script front end to the LaTeX 'pdfpages' package; see
https://www.ctan.org/tex-archive/macros/latex/contrib/pdfpages

Usage: pdfjam [OPTIONS] [--] [FILE1 [SEL1]] [FILE2 [SEL2]]...
where
* 'FILE1' etc. are PDF files (JPG and PNG files are also allowed).  For
   input from /dev/stdin, use the special name '/dev/stdin' in place of any
   of FILE1, FILE2, etc: this can be mixed with 'real' files as needed, to
   allow input through a pipe (note that if /dev/stdin is connected to tty,
   an error results).  If 'FILE1' is absent, pdfjam will use '/dev/stdin'
   (and will use '-' for the page selection -- see next item).
* 'SEL1' is a page selection for FILE1, etc.
   To select all pages (the default) use '-'.  See the pdfpages manual for
   more details.  An example:
          ... file1 '{},2,4-6,9-' ...
   makes an empty page, followed by pages 2,4,5,6 of file1, followed by pages
   9 onwards (up to the end of file1).
   A page selection can be applied to more than one file, e.g.,
          ... file1 file2 file3 1-7 ...
   applies page selection '1-7' to all three files; but for example
          ... file1 file2 2- file3 1-7 ...
   would apply the page selection '2-' to file1 and file2, and '1-7'
   to file3.  A page selection applies to all the files *immediately*
   preceding it in the argument list.  A missing page selection defaults to
   '-'; this includes the case where 'FILE1' is absent and so /dev/stdin gets
   used by default.
* 'options' are pdfpages specifications in the form '--KEY VALUE' (see
   below), or
     --help  (or -h, or -u)
                  Output this text only; no processing of PDF files.
     --configpath
                  Output the 'configpath' variable and exit immediately; no
                  processing of PDF files.
     --version (or -V)
                  Output the version number of pdfjam and exit immediately; no
                  processing of PDF files.
     --quiet  (or -q)
                  Suppress verbose commentary on progress.
     --batch
                  Run pdfjam sequentially on each input file in turn, and
                  produce a separate output file for each input, rather
                  than the default behaviour (which is a single run of
                  pdfjam on all of the input files, producing a single
                  output document).  For the location of output
                  files, see '--outfile'.  The --batch option cannot be
                  used in the case of input from stdin.
     --outfile PATH  (or -o PATH)
                  Specifies where the output file(s) will go.  If PATH is an
                  existing directory, pdfjam will attempt to write its
                  output PDF file(s) there, with name(s) derived from the
                  input file name(s) and the --suffix option (see below).
                  Otherwise the output file will be PATH.  If '/dev/stdin'
                  is the only or last input file, PATH cannot be a directory.
                  Your current default PATH for output is:
                  $outFile
     --suffix STRING
                  Specifies a suffix for output file names, to be used when
                  --outfile is either (a) a directory, or
                                      (b) not specified in a --batch call.
                  A good STRING should be descriptive: for example,
                           --suffix 'rotated'
                  would append the text '-rotated' to the name of the input
                  file in order to make the output file name, as in
                  'myfile-rotated.pdf'.  The STRING must not have zero
                  length.
                  [Default for you at this site: suffix=$suffix]
     --checkfiles
     --no-checkfiles
                  If the Unix 'file' utility is available, with options
                  -L and -b, the output of 'file -Lb FILE1' should be
                  'PDF document...' where '...' gives version information.
                  If this is the case on your system you should use
                  '--checkfiles'; otherwise use '--no-checkfiles',
                  in which case all input PDF files must have .pdf or .PDF
                  as their name extension.
                  [Default for you at this site: checkfiles=$checkfiles]
     --preamble STRING
                  Append the supplied STRING to the preamble of the LaTeX
                  source file(s), immediately before the '\begin{document}'
                  line.  An example:
                      pdfjam --nup 2x2 myfile.pdf -o myfile-4up.pdf \\
                          --preamble '\usepackage{fancyhdr} \pagestyle{fancy}'
                  The '--preamble' option can be used, for example, to load
                  LaTeX packages and/or to set global options.  If '--preamble'
                  is used more than once in the call, the supplied preamble
                  strings are simply concatenated.  For a note on avoiding
                  clashes, see the README file, also available at
                  https://github.com/pdfjam/pdfjam
     --keepinfo
     --no-keepinfo
                  Preserve (or not) Title, Author, Subject and Keywords
                  (from the last input PDF file, if more than one) in the
                  output PDF file.  This requires the pdfinfo utility, from
                  the xpdf package, and the LaTeX 'hyperref' package; if
                  either of those is not available, '--keepinfo' is ignored.
                  [Default for you at this site: keepinfo=$keepinfo]
     --pdftitle STRING
     --pdfauthor STRING
     --pdfsubject STRING
     --pdfkeywords STRING
                  Provide text for the  Title, Author, Subject and Keywords
                  in the output PDF file.  Requires the  LaTeX 'hyperref'
                  package.  These options, individually, over-ride --keepinfo.
     --otheredge
     --no-otheredge
                  Rotate every odd page by 180 degrees (or not).  Thus changes
                  along which edge the pages are flipped in duplex printing.
     --landscape
     --no-landscape
                  Specify landscape page orientation (or not) in the
                  output PDF file.
                  [Default for you at this site: landscape=$landscape]
     --twoside
     --no-twoside
                  Specify (or not) the 'twoside' document class option.
                  [Default for you at this site: twoside=$twoside]
     --paper PAPERSPEC  (or simply --PAPERSPEC)
                  Specify a LaTeX paper size, for example
                  '--paper a4' or simply '--a4paper' for ISO A4 paper.
                  A wide range of paper sizes is available thanks to the
                  LaTeX 'geometry' package.  For details see documentation
                  for LaTeX and/or the 'geometry' package.
                  If no default value is set and libpaper is not available,
                  A4 is used.
                  [Default for you at this site: paper=$paper]
     --papersize 'WIDTH,HEIGHT'
                  Specify a custom paper size in points = 1/72 inch (known as
                  bp in LaTeX and as pt in other software), e.g.
                      --papersize 612,792
                  Units may also be specified explicitly, e.g.
                      --papersize 10in,18cm
                  [Default for you at this site: papersize=$papersize]
     --pagecolor RGBSPEC
                  Specify a background colour for the output pages.  The
                  RGBSPEC must be a comma-separated trio of integers
                  between 0 and 255.  An example:
                         --pagecolor 150,200,150
                  [Default is no background colour]
     --tidy
     --no-tidy
                  Specify whether the temporary directory created by
                  pdfjam should be deleted.  Use '--no-tidy' or '--builddir'
                  below to help debug most errors.
                  [Default for you at this site: tidy=$tidy]
     --builddir PATH
                  Specifies a build directory to be used in place of a
                  temporary one. Existing files inside will be overwritten.
     --latex PATHTOLATEX
                  Specify the LaTeX engine to be used (one of pdflatex,
                  xelatex, lualatex).  The PATHTOLATEX string must be
                  the full path to a suitable LaTeX executable (for example
                  /usr/bin/xelatex on many unix systems).
                  [Default for you at this site: latex=$latex]
     --runs N
                  Run latex N times, for each output document made.
                  [Default for you at this site: runs=$runs]
     --vanilla
                  Suppress the reading of any pdfjam configuration files.
     --enc
                  Specify a command-line encoding
                  [Default for you at this site: enc=$enc]
     --KEY VALUE
                  Specify options to '\includepdfmerge', in the LaTeX
                  'pdfpages' package.  See the the pdfpages documentation
                  (usually 'texdoc pdfpages') for more information.
                  Here KEY is the name of any of the many options for
                  '\includepdfmerge', and VALUE is a corresponding value.
                  Examples:
                      --nup 2x1     (for 2-up side-by-side imposition)
                      --scale 0.7   (to scale all input pages to 70% size)
                      --offset '1cm 0.5cm'
                                    (to offset all pages -- note the quotes!)
                      --frame true  (to put a frame round each input page)
                      --booklet true (to reorder the pages in signatures,
                                      generally useful with --nup)
                      --signature N (specify the signature size, as the
                                     number of original pages in a signature
                                     in the final document. Caveat: booklet
                                     is a short form for signature, so if
                                     you use booklet true, signature will be
                                     ignored)
                      --trim '1cm 2cm 1cm 2cm' --clip true
                                    (to trim those amounts from left, bottom,
                                     right and top, respectively, of input
                                     pages)
                      --angle NNN (The angle of rotation in degrees. Angles
                                   that are not either 90, 180 or 270 will
                                   still create straight rectangular pages,
                                   only the content will be rotated.)
                  etc., etc.  For more information see the manual for
                  the 'pdfpages' package, at
                  https://www.ctan.org/tex-archive/macros/latex/contrib/pdfpages
* '--' can be used to signal that there are no more options to come.

Defaults for the options '--suffix', '--keepinfo', '--paper', '--outfile',
'--landscape', '--twoside', '--tidy', '--latex', '--runs', '--checkfiles'
and '--preamble' can be set in site-wide or user-specific configuration files.
The path that is searched for site-wide configuration files (named pdfjam.conf)
at this installation is
    $configpath
This configuration path can be changed by editing the pdfjam script if
necessary.  Any user-specific configuration should be put in a file named
.pdfjam.conf in your home directory.  (All of these files are ignored
if the '--vanilla' argument is used.)

For more information, including a sample configuration file, see
https://github.com/pdfjam/pdfjam.
"
##
##  END OF HELP TEXT
##
#########################################################################
#
# If --help is given, print help and exit. We do this here so that the
# configuration files have already been read, and default values can be
# shown in the help
for arg; do
	case $arg in
	--help | -u | -h)
		printf "%s\n" "$helptext"
		exit 0;;
	*) ;;
	esac
done
#########################################################################
##
##  ERROR CODES
##
E_USAGE=64           #  command line usage error
E_NOINPUT=66         #  cannot open input
E_UNAVAILABLE=69     #  service unavailable
E_SOFTWARE=70        #  internal software error
E_OSFILE=72          #  file does not exist or cannot be opened
E_CANTCREATE=73      #  can't create (user) output file
E_CONFIG=78          #  configuration error
##
##  Define a function to print an error message and exit:
##
error_exit() {
	if [ -r "$PDFJAM_MESSAGES_FILE" ]; then
		cat "$PDFJAM_MESSAGES_FILE" >&2
	else
		printf "%s" "$messages" 1>&2
	fi
	printf "  pdfjam ERROR: %s\n" "$1" 1>&2
	exit "$2"
}
##
#########################################################################
##
##  READ AND PROCESS THE ARGUMENTS
##
##  In case of NO argument supplied, mention 'pdfjam --help':
##
if test $# -eq 0; then
	prattle "No arguments supplied; continuing anyway. (See"
	prattle "'pdfjam --help' for information on usage.)" 1
fi
##
##  Now do the argument loop.
##
fileSpec=""
miscOptions=""
callOptions=""
optionsFinished=""
##
##  First note any '--checkfiles' or '--no-checkfiles' option
##
for arg; do
	case $arg in
	--checkfiles)
		checkfiles=checkfiles
		callOptions="$callOptions $1";;
	--no-checkfiles)
		checkfiles=
		callOptions="$callOptions $1";;
	esac
done
while test -n "$1$2"; do
	argUnmatched=""
	if test "$optionsFinished" != true; then
		case "$1" in
		--) ## signals end of command-line options
			optionsFinished=true
			shift
			continue
			;;
		--configpath)
			printf "%s\n" "$configpath"
			exit 0
			;;
		--* | -q | -o)
			if test "$pageSpecAwaited" = true; then
				## fill in any missing page specs before continuing
				fileSpec=$(printf "%s" "$fileSpec" | sed 's/|awaited/|-/g')
				pageSpecAwaited=false
			fi
			case "$1" in
			--checkfiles | --no-checkfiles | --batch) ;;  ## already done above
			--vanilla)
				callOptions="$callOptions $1"
				;;
			--quiet | -q)
				verbose=false
				callOptions="$callOptions --quiet"
				;;
			--outfile | -o)
				outFile="$2"
				callOptions="$callOptions --outfile $(enquote "$2")"
				shift
				;;
			--suffix)
				if test -n "$2"; then
					suffix="$2"
					callOptions="$callOptions $1 $(enquote "$2")"
					shift
				else
					error_exit \
						"'--suffix' string has zero length" \
						$E_USAGE
				fi
				;;
			--runs)
				runs="$2"
				## check if the argument is a number > 0
				if [ "$runs" -lt 1 ] 2>/dev/null; then
					error_exit \
						"'--runs' number must be at least 1" \
						$E_USAGE
				fi
				callOptions="$callOptions $1 $2"
				shift
				;;
			--paper)
				if ! paper=$(to_paper "$2"); then
					paper="$2"
					prattle "Paper '$paper' unknown to pdfjam."
				fi
				papersize=''
				callOptions="$callOptions $1 $(enquote "$paper")"
				shift
				;;
			--a?paper | --b?paper | --c?paper | --ansi?paper | \
			--letterpaper | --legalpaper | --executivepaper | \
			--b0j | --b1j | --b2j | --b3j | --b4j | --b5j | --b6j)
				paper=$(to_paper "${1#--}") \
					|| error_exit "Bad paper option '$1'." $E_USAGE
				papersize=''
				callOptions="$callOptions --paper $paper"
				;;
			--papersize)
				paper=''
				papersize=$(to_papersize "$2")
				callOptions="$callOptions $1 $(enquote "$papersize")"
				shift
				;;
			--preamble)
				preamble="$preamble$newline$2"
				shift
				;;
			--latex | --builddir | --enc | --pagecolor | \
			--pdftitle | --pdfauthor | --pdfsubject | --pdfkeywords)
				eval "${1#--}=$(escape_quote "$2")"
				callOptions="$callOptions $1 $(enquote "$2")"
				shift
				;;
			--tidy | --keepinfo | --landscape | --twoside | --otheredge)
				eval "${1#--}=${1#--}"
				callOptions="$callOptions $1"
				;;
			--no-tidy | --no-keepinfo | --no-landscape | --no-twoside | \
			--no-otheredge)
				eval "$(echo "${1#--no-}"|tr - _)="
				callOptions="$callOptions $1"
				;;
			--longedge)  ##  legacy
				otheredge=otheredge
				callOptions="$callOptions --otheredge"
				;;
			--shortedge)  ##  legacy
				otheredge=
				callOptions="$callOptions --no-otheredge"
				;;
			--*) ##  miscellaneous options for \includepdfmerge
				miscOptions="$miscOptions,${1#--}=$(embrace "$2")"
				callOptions="$callOptions ${1} $(enquote "$2")"
				shift
				;;
			esac
			;;
		'' | *)
			argUnmatched=true
			;;
		esac
	fi
	if test "$optionsFinished" = true || test "$argUnmatched" = true; then
		case "$1" in
		"" | /dev/stdin)
			fileSpec="$fileSpec$newline/dev/stdin|awaited"
			pageSpecAwaited=true
			inputFromStdin=true
			;;
		-)
			if test "$pageSpecAwaited" = true; then
				fileSpec=$(printf %s "$fileSpec" | sed 's/|awaited/|-/g')
				pageSpecAwaited=false
			else
				error_exit "no PDF/JPG/PNG file found at ${1}" \
					$E_NOINPUT
			fi
			;;
		*) ##  All other args should be PDF (or JPG/PNG)
			##  source files and page selections; if not, we'll quit
			if test -n "$checkfiles"; then ## not always available
				case $(file -Lb -- "$1") in
				"PDF document"* | "JPEG image data"* | "PNG image"*)
					##  it's a PDF file (or JPG/PNG) as expected
					fileSpec="$fileSpec$newline$1|awaited"
					pageSpecAwaited=true
					;;
				*)
					case ${1} in
					*.[pP][dD][fF] | *.[jJ][pP][eE][gG] | \
						*.[jJ][pP][gG] | *.[pP][nN][gG])
						## should be PDF/JPG/PNG file, but isn't
						error_exit "no PDF/JPG/PNG file found at ${1}" \
							$E_NOINPUT
						;;
					*) ##  if page spec needed, assume this is it;
						##  otherwise something is wrong
						if test "$pageSpecAwaited" = true; then
							escapedFilePath=$(printf '%s' "$1" | sed -e 's#/#\\/#g')
							fileSpec=$(printf "%s" "$fileSpec" \
								| sed "s/|awaited/|${escapedFilePath}/g")
							pageSpecAwaited=false
						else
							error_exit "no PDF/JPG/PNG file found at ${1}" \
								$E_NOINPUT
						fi
						;;
					esac
					;;
				esac
			else ## no checking of file contents; rely on .pdf extension
				case ${1} in
				*.[pP][dD][fF] | *.[jJ][pP][eE][gG] | \
					*.[jJ][pP][gG] | *.[pP][nN][gG])
					## assume it's a PDF/JPG/PNG file
					test -f "${1}" || error_exit \
						"${1} not found" $E_NOINPUT
					fileSpec="$fileSpec"$newline${1}"|"awaited
					pageSpecAwaited=true
					;;
				*) ##  if page spec needed, assume this is it;
					##  otherwise something is wrong
					if test "$pageSpecAwaited" = true; then
						escapedFilePath=$(printf '%s' "$1" | sed -e 's#/#\\/#g')
						fileSpec=$(printf "%s" "$fileSpec" \
							| sed "s/|awaited/|${escapedFilePath}/g")
						pageSpecAwaited=false
					else
						error_exit "no PDF/JPG/PNG file found at ${1}" \
							$E_NOINPUT
					fi
					;;
				esac
			fi
			;;
		esac
	fi
	shift
done
##
##  Use the default page spec for any that remain unspecified:
##
fileSpec=$(printf "%s" "$fileSpec" | sed '/^$/d; s/^ //; s/|awaited$/|-/')
##
##  Check whether input from stdin should be used by default:
if test "$PDFJAM_CALL_NUMBER" -eq 0 && test "$inputFromStdin" != true; then
	## the special argument '/dev/stdin' was not used
	if test -z "$fileSpec"; then
		## no argument specifying a PDF source was given
		inputFromStdin=true
		fileSpec="/dev/stdin|-"
		prattle "No PDF/JPG/PNG source specified: input is from stdin."
	fi
fi
## Massage options
[ "${paper:+set}" = "${papersize:+set}" ] && error_exit "Exactly one of \
\$paper='$paper' and \$papersize='$papersize' must be set." $E_SOFTWARE
miscOptions="${miscOptions#,}"
if test -n "$preamble"; then
	callOptions="$callOptions --preamble $(enquote "${preamble#"$newline"}")"
fi
callOptions="${callOptions# }"
if [ -n "$otheredge" ]; then
	otheredge='
{\makeatletter\AddToHook{shipout/before}{\ifodd\c@page\pdfpageattr{/Rotate 180}\fi}}'
fi
if [ -n "$papersize" ]; then
	if [ -n "$landscape" ]; then
		## geometry package ignores landscape, thus swap x,y → y,x manually
		papersize="${papersize#*,},${papersize%%,*}"
	fi
	papersize="papersize={$papersize}"
fi

documentOptions=
for i in "$paper" "$landscape" "$twoside"; do
	[ -n "$i" ] && documentOptions="$documentOptions$i,"
done
##
##  END OF ARGUMENT PROCESSING
##
#########################################################################
##
##  CHECK SYSTEM SETUP
##
##  These checks are not repeated in secondary calls.
##
if test "$PDFJAM_CALL_NUMBER" -eq 0; then ## not a secondary call
	##  Check whether there's a suitable latex to use:
	case "$latex" in
	"not found")
		error_exit "can't find pdflatex!" $E_UNAVAILABLE
		;;
	*) ##
		if test ! -x "$latex"; then
			error_exit \
				"configuration error, $latex is not an executable file" \
				$E_CONFIG
		fi
		;;
	esac
	##
	##  Check that necessary LaTeX packages are installed:
	##
	modifyPath=$(printf "%s" "$latex" | sed 's/\/[^\/]*$//')
	if [ -n "$modifyPath" ]; then
		PATH="$modifyPath:$PATH"
		export PATH
	fi
	case "$latex" in
	*tectonic*) ;;
	*)
		(kpsewhich pdfpages.sty >/dev/null) \
			|| error_exit \
				"LaTeX package pdfpages.sty is not installed" \
				$E_UNAVAILABLE
		;;
	esac
fi
if test -n "$keepinfo"; then
	case "$pdfinfo" in
	"not found")
		if test "$PDFJAM_CALL_NUMBER" -eq 0; then
			prattle \
				"The pdfinfo utility was not found, so --keepinfo is ignored."
		fi
		keepinfo=
		;;
	pdfinfo) ;;
	*) ## $pdfinfo was set in a configuration file
		if test ! -x "$pdfinfo"; then
			if test "$PDFJAM_CALL_NUMBER" -eq 0; then
				prattle \
					"No pdfinfo utility at $pdfinfo, so --keepinfo is ignored."
				keepinfo=
			fi
		fi
		;;
	esac
	case "$iconv" in
	"not found")
		if test "$PDFJAM_CALL_NUMBER" -eq 0; then
			prattle \
				"The iconv utility was not found, so --keepinfo is ignored."
		fi
		keepinfo=
		;;
	iconv) ;;
	*) ## $iconv was set in a configuration file
		if test ! -x "$iconv"; then
			if test "$PDFJAM_CALL_NUMBER" -eq 0; then
				prattle \
					"No iconv utility at $iconv, so --keepinfo is ignored."
				keepinfo=
			fi
		fi
		;;
	esac
fi
using_non_cygwin_latex_from_cygwin() {
	if [ -z "${__cache__using_non_cygwin_latex_from_cygwin}" ]; then
		if uname | grep -q CYGWIN \
			&& "${latex}" -version | head -1 | grep -qv Cygwin; then
			__cache__using_non_cygwin_latex_from_cygwin=0
		else
			__cache__using_non_cygwin_latex_from_cygwin=1
		fi
	fi
	return "${__cache__using_non_cygwin_latex_from_cygwin}"
}
##
##  END OF CHECKING THE SETUP
##
#########################################################################
##
##  TEMPORARY FILES
##
##  Make a secure temporary directory (following
##  the autoconf manual).
##
##  Use mktemp if possible; otherwise fall back on mkdir,
##  with random name to make file collisions less likely.
##
if test "$PDFJAM_CALL_NUMBER" = 0; then ## don't repeat this work for secondary calls
	if test -z "$builddir"; then
		PDFJAM_TEMP_DIR=''
		tidycode=$([ -n "$tidy" ] && echo ';cd "$pwd";rm -rf "$PDFJAM_TEMP_DIR"')
		trap "IFS='$OIFS'$tidycode;exit 1" HUP INT TERM
		trap "IFS='$OIFS'$tidycode" EXIT
		get_tempfile_dir() {
			for i in "$TMPDIR" "$TMP" /tmp /var/tmp .; do
				[ -d "$i" ] && [ -w "$i" ] && printf %s "$i" && return
			done
			return 1
		}
		tempfileDir="$(get_tempfile_dir)" || error_exit \
			'Cannot determine directory for temporary files.
		Fix your installation or provide --builddir PATH.' $E_SOFTWARE
		##  Try mktemp. If this fails, portably make up a random number.
		PDFJAM_TEMP_DIR=$( (umask 077 && mktemp -d "$tempfileDir/pdfjam-XXXXXX") 2>/dev/null) \
			|| {
				random=$(awk 'END { srand(); printf ("%d\n", rand()*1000000); }' /dev/null)
				PDFJAM_TEMP_DIR="$tempfileDir/pdfjam$$-$random"
				(umask 077 && mkdir "$PDFJAM_TEMP_DIR")
			} && [ -d "$PDFJAM_TEMP_DIR" ] && [ -w "$PDFJAM_TEMP_DIR" ] \
			|| error_exit 'Failed to create a temporary directory.
		Fix your installation or provide --builddir PATH.' $E_SOFTWARE
		if [ -z "$tidy" ]; then
			prattle "Temporary directory for this job is
        $PDFJAM_TEMP_DIR"
		fi
	else
		tidy=
		(umask 077 && mkdir -p "$builddir") || error_exit \
			"Cannot create build directory '$builddir'." $E_USAGE
		PDFJAM_TEMP_DIR="$(realpath -- "$builddir")"
	fi
	export PDFJAM_TEMP_DIR ##  so that same dir is used in secondary calls
	PDFJAM_MESSAGES_FILE="$PDFJAM_TEMP_DIR"/messages.txt
	export PDFJAM_MESSAGES_FILE
	## so that secondary calls can write messages there as well
	printf "%s" "$messages" >"$PDFJAM_MESSAGES_FILE" ## initial file contents
	messages=""                                      ## we won't be using this variable again!
else
	[ -d "$PDFJAM_TEMP_DIR" ] || error_exit \
		"Temporary directory $PDFJAM_TEMP_DIR missing." $E_SOFTWARE
	PDFJAM_TEMP_DIR="$PDFJAM_TEMP_DIR/file$PDFJAM_CALL_NUMBER"
	(umask 077 && mkdir -p "$PDFJAM_TEMP_DIR")
fi
if using_non_cygwin_latex_from_cygwin; then
	PDFJAM_TEMP_DIR=$(cygpath -w "$PDFJAM_TEMP_DIR")
fi
##
##  TEMPORARY DIRECTORY ALL DONE
##
#########################################################################
##
##  HANDLING THE "--batch" OPTION
##
##  If --batch was used, we'll call pdfjam separately on each input
##  file.
##
if test "$batch" = true; then
	if test "$fileSpec" = ""; then
		error_exit "--batch was used, but no PDF/JPG/PNG source file(s) specified" \
			$E_USAGE
	fi
	if test "$inputFromStdin" = true; then
		error_exit "--batch cannot be used with input from stdin" \
			$E_USAGE
	fi
	IFS="$newline"
	for k in $fileSpec; do
		sourcePath=$(printf "%s" "$k" | sed 's/|[^|]*$//')
		pageSpec=$(printf "%s" "$k" | sed 's/.*|//')
		callNumber=$((PDFJAM_CALL_NUMBER + 1))
		prattle "--"
		prattle "Processing file ${callNumber}, '$sourcePath'..."
		prattle "Page spec is '$pageSpec'."
		sourcePath=$(enquote "$sourcePath")
		PDFJAM_EFFECTIVE_CALL="$0 $callOptions -- $sourcePath $pageSpec"
		export PDFJAM_EFFECTIVE_CALL
		PDFJAM_CALL_NUMBER=$callNumber
		export PDFJAM_CALL_NUMBER
		eval "$PDFJAM_EFFECTIVE_CALL"
		## i.e., call pdfjam again with one input file
	done
	if [ "$verbose" = "true" ]; then cat "$PDFJAM_MESSAGES_FILE" >&2; fi
	IFS=$OIFS
	exit 0
fi
##
##  END OF THE '--batch' PROCESSING
##
#########################################################################
##
##  RECORD THE EFFECTIVE CALL TO PDFJAM, FOR POSSIBLE DEBUGGING PURPOSES
##
##  Save the text of this (effective) call to pdfjam in a temporary file,
##  for later inspection if necessary.
##
##  For secondary calls, the effective call text is already made;
##  otherwise we make it here.
##
if test "$PDFJAM_CALL_NUMBER" -gt 0; then
	theCall="$PDFJAM_EFFECTIVE_CALL"
else
	filePageSpec=""
	IFS="$newline"
	for k in $fileSpec; do
		##  Last substitution on next line is needed for silly characters in
		##  file names...
		sourcePath=$(printf "%s" "$k" | sed 's/|[^|]*$//')
		sourcePath=$(enquote "$sourcePath")
		pageSpec=$(printf "%s" "$k" | sed 's/.*|//')
		filePageSpec="$filePageSpec$sourcePath $pageSpec "
	done
	IFS="$OIFS"
	theCall="$0 $callOptions -- $filePageSpec"
fi
printf "%s\n%s\n" "cd $pwd" "$theCall" >"$PDFJAM_TEMP_DIR"/call.txt
prattle "Effective call for this run of pdfjam:"
prattle "$theCall" 1
##
#########################################################################
##
##  NOW MAKE THE INPUT FILE ETC., READY FOR LATEX
##
filePageList=""  ## initialize a string to supply to \includepdfmerge
counter=0
##
##  Make symbolic link(s) to the source file(s) in the temporary dir,
##  and make the $filePageList string for input to \includepdfmerge
##
stdinUnread=true
IFS="$newline"
for k in ${fileSpec}; do
	counter=$((counter + 1))
	sourcePath=$(printf "%s" "$k" | sed 's/|[^|]*$//')
	pageSpec=$(printf "%s" "$k" | sed 's/.*|//')
	##  Check, though not exhaustively, for problems with the
	##  page spec: leading or trailing comma, double comma or
	##  double dash, alphabetic characters other than the word "last",
	##  braces not paired as {} with nothing inbetween.  A fully
	##  specified pattern for valid \includepdfmerge page spec would
	##  be better here; but life is too short...
	if printf "%s" "$pageSpec" | sed 's/last/99/g' \
		| grep '^,.*\|,$\|,,\|--\|[A-Za-z]\|{[^}]\|[^{]}' 1>/dev/null; then
		error_exit "invalid page spec $pageSpec" $E_USAGE
	fi
	case $sourcePath in
	/dev/stdin)
		uniqueName=stdin.pdf
		if test "$stdinUnread" = true; then
			if tty -s; then
				error_exit \
					"tty is connected to stdin, no PDF/JPG/PNG file found" \
					$E_NOINPUT
			fi
			cat >"$PDFJAM_TEMP_DIR/$uniqueName"
			stdinUnread=false
		fi
		;;
	*)
		pdfName=$(basename -- "$sourcePath")
		sourceDir=$(dirname -- "$sourcePath") ## zsh on Mac OS 10.5 chokes here
		cd "$sourceDir" || exit 1  ##  just to get the full path
		sourceDir=$(pwd)
		cd "$pwd" || exit 1
		sourceFullPath="$sourceDir/$pdfName"
		uniqueName="source-$counter.pdf"
		if using_non_cygwin_latex_from_cygwin; then
			cp -f "$sourceFullPath" "$PDFJAM_TEMP_DIR/$uniqueName"
		else
			ln -fs "$sourceFullPath" "$PDFJAM_TEMP_DIR/$uniqueName"
		fi
		;;
	esac
	filePageList="$filePageList,$uniqueName,$pageSpec"
done
IFS="$OIFS"
filePageList="${filePageList#,}"
if using_non_cygwin_latex_from_cygwin; then
	filePageList=$(printf %s "$filePageList" | tr \\\\ /)
fi

##
##  Finally enter build directory
##
cd "$PDFJAM_TEMP_DIR" || exit 1

##
##  Do the pdfinfo stuff (if relevant)...
##
select_pdfinfo() {
	##  pdfinfo fields are 17 chars wide.
	##  This implementation preserves leading spaces
	printf %s "$2" | awk "/^$(printf %-17s "$1:")/{print substr(\$0,18)}"
}
if test -n "$keepinfo"; then
	prattle "Calling ${pdfinfo}..."
	PDFinfo=$(pdfinfo -enc UTF-8 "$uniqueName")
	pdftitl=$(select_pdfinfo 'Title'    "$PDFinfo")
	pdfauth=$(select_pdfinfo 'Author'   "$PDFinfo")
	pdfsubj=$(select_pdfinfo 'Subject'  "$PDFinfo")
	pdfkeyw=$(select_pdfinfo 'Keywords' "$PDFinfo")
fi

echo_iconv_from_enc() {
	printf %s "$1" | "$iconv" -f "$enc" -t UTF-8
}
if test -n "${pdftitle+X}"; then
	pdftitl=$(echo_iconv_from_enc "${pdftitle-}")
fi
if test -n "${pdfauthor+X}"; then
	pdfauth=$(echo_iconv_from_enc "${pdfauthor-}")
fi
if test -n "${pdfsubject+X}"; then
	pdfsubj=$(echo_iconv_from_enc "${pdfsubject-}")
fi
if test -n "${pdfkeywords+X}"; then
	pdfkeyw=$(echo_iconv_from_enc "${pdfkeywords-}")
fi

echo_hex_iconv_utf16be() {
	printf '%s' "$1" \
		| "$iconv" -f UTF-8 -t UTF-16BE \
		| od -An -v -tx1 \
		| tr -d '[:space:]'
}
addto_pdfinfo() {
	if [ -n "$2" ]; then
		## Convert to PDF string and append
		raw_pdfinfo="$raw_pdfinfo
    /$1 <feff$(echo_hex_iconv_utf16be "$2")> %"
	fi
}
raw_pdfinfo=
addto_pdfinfo Title    "$pdftitl"
addto_pdfinfo Author   "$pdfauth"
addto_pdfinfo Subject  "$pdfsubj"
addto_pdfinfo Keywords "$pdfkeyw"
if [ -n "$raw_pdfinfo" ]; then
	raw_pdfinfo='
\ifdefined\luatexversion% LuaLaTeX
  \protected\def\pdfinfo{\pdfextension info}
\fi
\ifdefined\XeTeXversion% XeLaTeX
  \protected\def\pdfinfo#1{\AddToHook{shipout/firstpage}{\special{pdf:docinfo << #1 >>}}}
\fi
\ifdefined\pdfinfo%
  \pdfinfo{%'"$raw_pdfinfo"'
  }%
\fi'
fi

## Apply $pagecolor if set
if [ -n "$pagecolor" ]; then
	colorcode="
\\usepackage{color}
\\definecolor{bgclr}{RGB}{$pagecolor}
\\pagecolor{bgclr}"
else
	colorcode=
fi
##
##  Now set up the LaTeX file
##
fileName="$(pwd)/a"
(cat <<EndTemplate
\batchmode
\documentclass[$documentOptions]{article}$colorcode
\usepackage[$papersize]{geometry}
\usepackage[utf8]{inputenc}$raw_pdfinfo
\usepackage{pdfpages}$otheredge$preamble
\begin{document}
\includepdfmerge[$miscOptions]{$filePageList}
\end{document}
EndTemplate
) >"$fileName.tex"
##
##  INPUT FILES ARE ALL READY
##
#########################################################################
##
##  RUN LATEX AND COPY THE RESULTING PDF FILE
##
if [ "$runs" -eq 1 ] ;
then prattle "Calling ${latex}..."
else prattle "Calling ${latex} $runs times..."
fi
failureText=\
"FAILED.
The call to $latex resulted in an error."
if [ -n "$tidy" ]; then
	failureText="$failureText
Rerun with '--no-tidy' or '--builddir PATH' to diagnose the problem."
else
	failureText="$failureText
You can examine the build directory at
        $(pwd)
to try to diagnose the problem."
fi
i=1
while [ "$i" -le "$runs" ]; do
	"$latex" "$fileName.tex" >"$fileName.msgs" || {
		prattle "$failureText"
		error_exit "Run $i: Output file not written" $E_SOFTWARE
	}
	i=$((i + 1))
done
cd "$pwd" || exit 1
if test -f "$fileName".pdf; then ## if LaTeX didn't choke
	##  Checks on output file path:
	if test -d "$outFile"; then ## outfile is a directory
		if test ! -w "$outFile"; then
			error_exit \
				"FAILED: no write permission on ${outFile}." \
				$E_OSFILE
		fi
		separator="-"
		if test "$pageSpec" != "-"; then
			separator=-"$pageSpec"-
		fi
		outFile=$(printf "%s" "$outFile" | sed 's/\/$//') ## delete any trailing slash
		pdfName=$(basename -- "$sourcePath")
		pdfName=$(printf "%s" "$pdfName" |
			sed 's/\.[pP][dD][fF]$//') ## strip extension
		pdfName="$pdfName$separator$suffix".pdf
		outFile="$outFile/$pdfName"
	fi
fi
if test -f "$outFile" && test ! -w "$outFile"; then
	## file exists and we can't over-write it
	error_exit "no write permission at ${outFile}" $E_CANTCREATE
fi
#fileSize=$(wc -c < "$fileName.pdf" | sed 's/^\ *//')
## Avoid explicit output to /dev/stdout.
if test "$outFile" = "/dev/stdout" \
	&& cat "$fileName".pdf 2> /dev/null \
	|| cat "$fileName".pdf > "$outFile" 2>/dev/null
then prattle "Finished.  Output was written to '${outFile}'."
else error_exit "cannot write output at ${outFile}" $E_CANTCREATE
fi
if [ "$PDFJAM_CALL_NUMBER" = "0" ] && [ "$verbose" = "true" ]; then
	cat "$PDFJAM_MESSAGES_FILE" >&2
fi
exit 0
##
##  END
##
#########################################################################