pdfcat.sh is a bash script to concatenate PDFs using LaTeX with the pdfpages package (see https://www.ctan.org/pkg/pdfpages), while also allowing to specify sections and subsections, and to create a table of contents in the resulting PDF.

This script requires the following utilities:

• pdflatex (with the packages geometry, hyperref, inputenc, and pdfpages).
• latexmk.
• GNU coretutils.

See also the pdfjam shell script (https://github.com/DavidFirth/pdfjam).

pdfcat.sh can be used as a command line program:

pdfcat.sh options

or it can be also used by sourcing it into a bash script with:

. pdfcat.sh

and using the functions provided (see the Sourced usage section).

• -h, --help Show the help message.

• -o, --output <filename> Set ouput PDF filename. Shorthand for -O outputfile <filename>. If not set it will default to out.pdf.

• -O, --option <name> <value> Set an option to a given value. See the Configuration options section for the available options.

• -p, --pdf <file> [ <options> ] Add a PDF file with the corresponding options for \includepdf. If options are not specified, the default options specified in the defaultpdfpagesoptions option will be used.

• -0, --section <name> Add a section.

• -1, --subsection <name> Add a subsection.

• -2, --subsubsection <name> Add a subsubsection.

Options -O, -p, -0, -1, and -2 can be specified multiple times.

The available configuration options are:

• compilationdir: Directory for generating and compiling the tex file. The default is to create a temporary directory with mktemp.
• compilationdirremove: Remove compilation directory at exit. Default: true.
• contentsname: Name for the table of contents section.
• defaultpdfpagesoptions: pdfpages package \includepdf command options. Default: 'pages=-'.
• generatetoc: Generate a table of contents. Default: false.
• geometryoptions: Geometry package options.
• hyperrefoptions: Hyperref package options. Default: 'colorlinks,linkcolor=blue'.
• inputpreamble: LaTeX code to add at the preamble.
• inputbegin: LaTeX code to add at the beginning of the document.
• inputaftertoc: LaTeX code to add at the document after the table of content.
• inputend: LaTeX code to add at the end of the document.
• outputfile: Output filename. Default: 'out.pdf'.
• pdfminorversion: PDF minor version. Default: 7.

The input* options also allow specifying a filename, for this, start the option with the character @ and set the rest with the name of the file.

pdfcat.sh also allows sourcing it into a bash script. The functionality provided is the same as in command line. When sourced, pdfcat.sh provides the following functions:

• addpdf <file> [ <options> ] Add a PDF file with its options for includecommand. Equivalent to the command line -p or --pdf options.

• addsection <name> Add a section. Equivalent to the command line -0 or --section options.

• addsubsection <name> Add a subsection. Equivalent to the command line -1 or --subsection options.

• addsubsubsection <name> Add a subsection. Equivalent to the command line -2 or --subsubsection options.

• genpdf Generate the output PDF file.

The PDF configuration options are available directly as variables. For example, to change the defaultpdfpagesoptions to 'pages=1', it can be done with the following bash line:

defaultpdfpagesoptions='pages=1'

Consider that we have two PDFs, A1.pdf and A2.pdf, which belong to some topic A, and other two PDFs, B1.pdf and B2.pdf, which belong to some other topic B. We could generate a PDF document with two sections (A and B), and two subsections in each section, one for each PDF in each section. To do so we would call pdfcat.sh as follows:

pdfcat.sh -O outputfile "my_pdf.pdf" -O generatetoc true \
          -0 "A" -1 "My PDF A1" -p A1.pdf -1 "My PDF A2" -p A2.pdf \
          -0 "B" -1 "My PDF B1" -p B1.pdf -1 "My PDF B2" -p B2.pdf

If we source pdfcat.sh into a bash script we could do as follows:

#!/bin/bash
. pdfcat.sh

outputfile="my_pdf.pdf"
generatetoc=true

addsection "A"
addsubsection "My PDF A1"
addpdf "A1.pdf"
addsubsection "My PDF A2"
addpdf "A2.pdf"

addsection "B"
addsubsection "My PDF B1"
addpdf "B1.pdf"
addsubsection "My PDF B2"
addpdf "B2.pdf"

genpdf

Limitations from the pdfpages package:

• All pages in the output PDF will have the same size and orientation.
• All kinds of links will get lost during inclusion.

See the documentation of the pdfpages package for more information.