Buildpack: libvips

This buildpack installs libvips in your Scalingo container.

For now, these stacks are supported:

scalingo-20

Usage

Add the following buildpack to your .buildpacks file:

https://github.com/Frzk/sclng-solutions-engineer-buildpack.git

For example, if your app is written with Ruby on Rails, your .buildpacks file could look like this:

https://github.com/Frzk/sclng-solutions-engineer-buildpack.git
https://github.com/Scalingo/ruby-buildpack.git

And then you would just have to push your app to Scalingo to build and run it:

git push scalingo master

Using a specific version of `libvips`

By default the buildpack will install the latest release of libvips to your application, but you can install a specific version of libvips by setting the LIBVIPS_VERSION environment variable to the desired value.

If the specified version hasn't been pre-compiled yet, you can fix this by yourself by generating the needed pre-compiled binaries (see Builder script).

Builder script

The builder.sh script leverages Docker to compile and prepare an archive for a specific version of libvips. Since compiling is very time-consuming, it's smarter to compile it once and benefit from it thereafter. After the tar file is built, it's placed in the compiled directory. Please git commit the new file to your buildpack fork repo so you can use it.

Build configurations

libvips is compiled without installing optional dependencies. If you need a specific option, feel free to modify the builder/Dockerfile to suit your needs.

Build configuration: scalingo-20

enable debug: no
enable deprecated library components: yes
enable modules: no
use fftw3 for FFT: no
accelerate loops with orc: no
ICC profile support with lcms: yes (lcms2)
zlib: yes
text rendering with pangocairo: no
font file support with fontconfig: 
RAD load/save: yes
Analyze7 load/save: yes
PPM load/save: yes
GIF load:  yes
GIF save with cgif: no
EXIF metadata support with libexif: yes
JPEG load/save with libjpeg: yes (pkg-config)
JXL load/save with libjxl: no (dynamic module: no)
JPEG2000 load/save with libopenjp2: no
PNG load with libspng: no
PNG load/save with libpng: yes (pkg-config libpng >= 1.2.9)
quantisation to 8 bit: no
TIFF load/save with libtiff: yes (pkg-config libtiff-4)
image pyramid save: no
HEIC/AVIF load/save with libheif: no (dynamic module: no)
WebP load/save with libwebp: no
PDF load with PDFium:  no
PDF load with poppler-glib: no (dynamic module: no)
SVG load with librsvg-2.0: yes
EXR load with OpenEXR: yes
OpenSlide load: no (dynamic module: no)
Matlab load with matio: no
NIfTI load/save with niftiio: no
FITS load/save with cfitsio: no
Magick package: MagickCore (dynamic module: no)
Magick API version: magick6
load with libMagickCore: yes
save with libMagickCore: yes