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58 lines
1.8 KiB
Markdown
58 lines
1.8 KiB
Markdown
# Installer Library
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This folder contains the Dockerfiles for building certain installers or libraries, which are then pulled into the main image.
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## [jbig2enc](https://github.com/agl/jbig2enc)
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### Why
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JBIG is an image coding which can achieve better compression of images for PDFs.
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### What
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The Docker image builds a shared library file and utility, which is copied into the correct location in the final image.
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### Updating
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1. Ensure the given qpdf version is present in [Debian bookworm](https://packages.debian.org/bookworm/qpdf)
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2. Update `.build-config.json` to the given version
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3. If the Debian specific version has incremented, update `Dockerfile.qpdf`
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See Also:
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- [OCRMyPDF Documentation](https://ocrmypdf.readthedocs.io/en/latest/jbig2.html)
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## [psycopg2](https://www.psycopg.org/)
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### Why
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The pre-built wheels of psycopg2 are built on Debian 9, which provides a quite old version of libpq-dev. This causes issue with authentication methods.
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### What
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The image builds psycopg2 wheels on Debian 10 and places the produced wheels into `/usr/src/wheels/`.
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See Also:
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- [Issue 266](https://github.com/paperless-ngx/paperless-ngx/issues/266)
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## [qpdf](https://qpdf.readthedocs.io/en/stable/index.html)
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### Why
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qpdf and it's library provide tools to read, manipulate and fix up PDFs. Version 11 is also required by `pikepdf` 6+ and Debian 9 does not provide above version 10.
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### What
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The Docker image cross compiles .deb installers for each supported architecture of the main image. The installers are placed in `/usr/src/qpdf/${QPDF_VERSION}/${TARGETARCH}${TARGETVARIANT}/`
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## [pikepdf](https://pikepdf.readthedocs.io/en/latest/)
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### Why
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Required by OCRMyPdf, this is a general purpose library for PDF manipulation in Python via the qpdf libraries.
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### What
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The built wheels are placed into `/usr/src/wheels/`
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