chapter-splitter

chapter-splitter is a tool to split PDF books into individual chapters.

Chapter data needs to be previously submitted to Crossref or Thoth so that chapter-splitter can query the server and retrieve information such as chapter page ranges, title and author(s) to add to the output PDFs.

Usage

The help page $ python3 ./main.py --help reports:

Usage: main.py [OPTIONS] DOI

Arguments:
  DOI  [required]

Options:
  --input-file PATH               [default: ./file.pdf]
  --output-folder PATH            [default: ./output/]
  --database TEXT                 [default: thoth]
  --write-urls / --no-write-urls  [default: write-urls]
  --help                          Show this message and exit.

so a running command would look something like this:

$ python3 ./main.py --input-file my_file.pdf --output-folder ~/output \ --database crossref 10.11647/obp.0309

or querying Thoth:

$ python3 ./main.py --input-file my_file.pdf --output-folder ~/output \ --database thoth 10.11647/obp.0309

chapter-splitter would try to append both the front cover of the original PDF and the copyright page to the output files. Page numbers (of these pages in the original document) are defined with the environment variables COVER_PAGE and ENV COPYRIGHT_PAGE (number, zero based).

$ COVER_PAGE=0 $ COPYRIGHT_PAGE=4

The --write_urls option attempts to write the appropriate OBP-specific Landing Page URL and Full Text URL to Thoth for each chapter created. For this, it is necessary to provide Thoth login credentials via the environment variables THOTH_EMAIL and THOTH_PWD.

$ [email protected] $ THOTH_PWD=password $ python3 ./main.py --input-file my_file.pdf --output-folder ~/output \ --database thoth --write-urls 10.11647/obp.0309

Running with docker

Running the command reported above in docker would be:

docker run --rm \
  -e [email protected] \
  -e THOTH_PWD=password \
  -v /path/to/local.pdf:/ebook_automation/file.pdf \
  -v /path/to/output:/ebook_automation/output \
  openbookpublishers/chapter-splitter \
  main.py 10.11647/obp.0309

Alternatively you may clone the repo, build the image using docker build . -t some/tag and run the command above replacing openbookpublishers/chapter-splitter with some/tag.

Running locally

Installation

chapter-splitter requires exiftool to be installed on your system. These tools are available in the official repositories of debian/debian-based distributions. Run apt-get install exiftool.

Besides python standard libraries, chapter-splitter requires some extra-libraries noted in requirements.txt. To install them (within a virtual environment, if you prefer), run pip3.5 install requirements.txt.

Dev

Git hooks

Use pre-commit.sh as a pre commit git hook to build a test image that will run flake8 to enforce PEP8 style.

ln -sf ../../pre-commit.sh .git/hooks/pre-commit