├── .github
    └── workflows
    │   └── docker-image.yml
├── .gitmodules
├── Dockerfile
└── README.rst


/.github/workflows/docker-image.yml:
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 1 | name: Publish Docker image
 2 | 
 3 | on:
 4 |   push:
 5 |     branches: [ master ]
 6 | 
 7 | jobs:
 8 | 
 9 |   push_to_registry:
10 |     name: Push Docker image to Docker Hub
11 |     runs-on: ubuntu-latest
12 | 
13 |     steps:
14 |     - name: Check out the repo
15 |       uses: actions/checkout@v2
16 |       with:
17 |         submodules: true
18 | 
19 |     - name: Log in to Docker Hub
20 |       uses: docker/login-action@v1
21 |       with:
22 |         username: ${{ secrets.DOCKERHUB_USERNAME }}
23 |         password: ${{ secrets.DOCKERHUB_PASSWORD }}
24 | 
25 |     - name: Build and push Docker image
26 |       uses: docker/build-push-action@v2
27 |       with:
28 |         context: .
29 |         push: true
30 |         tags: ilyabystrov/djvu2pdf:latest
31 | 
32 | 


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/.gitmodules:
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 1 | [submodule "jbig2enc"]
 2 | 	path = jbig2enc
 3 | 	url = https://github.com/agl/jbig2enc
 4 | [submodule "ImageMagick"]
 5 | 	path = ImageMagick
 6 | 	url = https://github.com/ImageMagick/ImageMagick
 7 | [submodule "djvu2pdf"]
 8 | 	path = djvu2pdf
 9 | 	url = https://github.com/vindvaki/djvu2pdf.git
10 | 


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/Dockerfile:
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 1 | FROM ubuntu:18.04
 2 | 
 3 | ENV DEBIAN_FRONTEND=noninteractive
 4 | RUN sed -i -e 's/# deb-src/deb-src/' /etc/apt/sources.list
 5 | RUN apt-get update && apt-get -y upgrade
 6 | RUN apt-get -y install djvulibre-bin libtiff-tools ocrodjvu 
 7 | 
 8 | # <!-- ImageMagick
 9 | # Fix for: This version of ImageMagick doesn't support JPEG2000 compression.
10 | RUN apt-get -y build-dep imagemagick
11 | RUN apt-get -y install libopenjp2-7-dev
12 | 
13 | RUN mkdir /opt/ImageMagick
14 | COPY ImageMagick /opt/ImageMagick
15 | 
16 | WORKDIR /opt/ImageMagick
17 | RUN ./configure && make install
18 | # -->
19 | 
20 | # <!-- jbig2
21 | # Fix for: JBIG2 compression has been requested, but the encoder is not available.
22 | RUN apt-get -y install automake libleptonica-dev 
23 | 
24 | RUN mkdir /opt/jbig2enc
25 | COPY jbig2enc /opt/jbig2enc
26 | 
27 | WORKDIR /opt/jbig2enc 
28 | RUN ./autogen.sh && ./configure && make install
29 | # -->
30 | 
31 | RUN apt-get -y install ruby ruby-dev
32 | RUN gem install iconv pdfbeads
33 | 
34 | # <!-- Configure JP2 settings
35 | # based on https://github.com/ifad/pdfbeads/issues/3
36 | RUN find / -name 'pdfpage.rb' -exec \
37 |   sed -i \
38 |   -e "s/'JP2','numrlvls',4/'JP2','numrlvls',4/" \
39 |   -e "s/'JP2','rate',0.015625/'JP2','rate',256/" \
40 |   {} \;
41 | # -->
42 | 
43 | # <!-- djvu2pdf
44 | RUN mkdir /opt/djvu2pdf
45 | ENV PATH=/opt/djvu2pdf:$PATH
46 | 
47 | COPY djvu2pdf /opt/djvu2pdf
48 | # -->
49 | 
50 | RUN mkdir /opt/work
51 | WORKDIR /opt/work
52 | 
53 | ENTRYPOINT ["djvu2pdf"]
54 | 
55 | #modeline vim: set fdm=marker foldmarker=<!--,--> commentstring=\ #%s:
56 | 


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/README.rst:
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 1 | ######################
 2 | Containerized DjVu2PDF
 3 | ######################
 4 | 
 5 | A convenient way to convert files from `DjVu` to `PDF` format while preserving the text layer.
 6 | 
 7 | The solution utilizes `djvu2pdf <https://github.com/vindvaki/djvu2pdf>`_ script, which, in turn, depends on 
 8 | other libraries like pdfbeads, djvulibre-bin, etc.
 9 | 
10 | * All dependencies are packed into docker image (amd64).
11 | * Some libraries are installed from source in order to utilize specific features: JBIG2 and JPEG 2000 (JP2)
12 |   compression support.
13 | * JP2 configuration in pdfbeads is modified.
14 | 
15 | Run details
16 | ===========
17 | 
18 | * DockerHub: https://hub.docker.com/r/ilyabystrov/djvu2pdf
19 | 
20 | ::
21 | 
22 |   docker run --rm -u $(id -u):$(id -g) -v $(pwd):/opt/work ilyabystrov/djvu2pdf filename.djvu filename.pdf
23 | 
24 | * `--rm` option - removing container after execution
25 | * `-u $(id -u):$(id -g)` - run process with the same UID and GID
26 | * -v $(pwd):/opt/work - **(required)** bind mounting of the current directory to the working directory in the 
27 |   container
28 | 
29 | Alias
30 | -----
31 | 
32 | Put the following line into `~/.bashrc` or a similar configuration file:
33 | 
34 | ::
35 | 
36 |   alias djvu2pdf='docker run --rm -u $(id -u):$(id -g) -v $(pwd):/opt/work ilyabystrov/djvu2pdf'
37 | 
38 | It will allow using the short command
39 | 
40 | ::
41 |   
42 |   djvu2pdf filename.djvu filename.pdf
43 | 
44 | 


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