.deb package building for ubuntugis 20.04 (#15)

* Instructions and docker images for building ubuntugis .deb packages

* Use the correct control file for unstable package

* Update ubuntu package building readme with links

contrib/ubuntu/README.md

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+# To build .deb packages
+
+Run the following command **from the root of the repository**
+
+`docker build . -f contrib/ubuntu/focal_ubuntugis_stable/Dockerfile -t kealib_deb_builder`
+
+This creates a docker image which should have the debian built in /usr/local/packages from where you can copy it out, e.g.,
+
+`docker run --rm --entrypoint cat kealib_deb_builder /usr/local/packages/libkea_1.4.14-1.deb > /tmp/libkea_1.4.14-1.deb`
+
+## Hosted Packages (Use at own risk!)
+
+Environment Systems Ltd host some packages built as above for convenience:
+
+ - https://envsys-public.s3.amazonaws.com/ubuntu/kealib/focal_ubuntugis_stable_libkea_1.4.14-1.deb
+ - https://envsys-public.s3.amazonaws.com/ubuntu/kealib/focal_ubuntugis_unstable_libkea_1.4.14-1.deb

contrib/ubuntu/focal_ubuntugis_stable/DEBIAN/control

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+Package: libkea
+Version: 1.4.14-1
+Section: science
+Priority: optional
+Architecture: amd64
+Depends: libgdal29, libhdf5-cpp-103, libproj19
+Maintainer: Environment Systems Ltd. (developers@envsys.co.uk)
+Description: An HDF5 Based Raster File Format
+  KEALib provides an implementation of the GDAL data model. The format supports raster attribute tables, image pyramids, meta-data and in-built statistics while also handling very large files and compression throughout.
+ Based on the HDF5 standard, it also provides a base from which other formats can be derived and is a good choice for long term data archiving. An independent software library (libkea) provides complete access to the KEA image format and a GDAL driver allowing KEA images to be used from any GDAL supported software.
+ Development work on this project has been funded by Landcare Research. For more information see http://kealib.org

contrib/ubuntu/focal_ubuntugis_stable/Dockerfile

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+#
+# This creates an Ubuntu derived base image to build
+# Kealib and package it as .deb
+# 
+# NOTE: The built package is designed to work on ubuntu focal with ubuntu-gis stable PPA
+# This is for the updated gdal versions available within that PPA.
+#
+# Ubuntu 20.04 Bionic Beaver
+FROM ubuntu:focal
+
+MAINTAINER EnvSys <developers@envsys.co.uk>
+
+ENV ROOTDIR /usr/local/
+
+ENV TZ=Europe/London
+RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
+
+# Load assets
+WORKDIR $ROOTDIR/
+
+# Install basic dependencies
+RUN apt-get update -y && \
+    apt-get install -y --no-install-recommends software-properties-common && \
+    add-apt-repository universe && \
+    add-apt-repository -y ppa:ubuntugis/ppa && \
+    apt-get update -y && apt-get install --no-install-recommends -y \
+    build-essential \
+    libgdal-dev \
+    libhdf5-dev \
+    cmake
+
+ARG KEALIB_VER=1.4.14
+ARG PACKAGE_DIR=/usr/local/packages
+ARG KEALIB_PACKAGE_DIR=$PACKAGE_DIR/libkea_$KEALIB_VER-1
+ARG make_threads=7
+
+RUN mkdir /usr/local/src/kealib
+COPY . /usr/local/src/kealib
+
+RUN mkdir -p $KEALIB_PACKAGE_DIR/DEBIAN && mkdir -p $KEALIB_PACKAGE_DIR/etc/profile.d
+
+# Install kealib
+RUN cd /usr/local/src/kealib && \
+    cmake \
+    -D CMAKE_VERBOSE_MAKEFILE=ON \
+    -D HDF5_INCLUDE_DIR=/usr/include/hdf5/serial \
+    -D GDAL_INCLUDE_DIR=/usr/include/gdal \
+    -D LIBKEA_WITH_GDAL=ON \
+    -D BUILD_SHARED_LIBS=ON \
+    -D CMAKE_BUILD_TYPE=Release \
+    -D CMAKE_INSTALL_PREFIX=/usr \
+    . && \
+    make -j "${make_threads}" && \
+    make install DESTDIR=$KEALIB_PACKAGE_DIR && \
+    echo export GDAL_DRIVER_PATH=/usr/lib/gdalplugins >> $KEALIB_PACKAGE_DIR/etc/profile.d/kealib.sh
+
+COPY ./contrib/ubuntu/focal_ubuntugis_stable/DEBIAN $KEALIB_PACKAGE_DIR/DEBIAN
+RUN dpkg-deb --build $KEALIB_PACKAGE_DIR
+RUN echo "The package is built and is available in the image in $PACKAGE_DIR"

contrib/ubuntu/focal_ubuntugis_unstable/DEBIAN/control

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+Package: libkea
+Version: 1.4.14-1
+Section: science
+Priority: optional
+Architecture: amd64
+Depends: libgdal30, libhdf5-cpp-103, libproj22
+Maintainer: Environment Systems Ltd. (developers@envsys.co.uk)
+Description: An HDF5 Based Raster File Format
+  KEALib provides an implementation of the GDAL data model. The format supports raster attribute tables, image pyramids, meta-data and in-built statistics while also handling very large files and compression throughout.
+ Based on the HDF5 standard, it also provides a base from which other formats can be derived and is a good choice for long term data archiving. An independent software library (libkea) provides complete access to the KEA image format and a GDAL driver allowing KEA images to be used from any GDAL supported software.
+ Development work on this project has been funded by Landcare Research. For more information see http://kealib.org

contrib/ubuntu/focal_ubuntugis_unstable/Dockerfile

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+#
+# This creates an Ubuntu derived base image to build
+# Kealib and package it as .deb
+# 
+# NOTE: The built package is designed to work on ubuntu focal with ubuntu-gis stable PPA
+# This is for the updated gdal versions available within that PPA.
+#
+# Ubuntu 20.04 Bionic Beaver
+FROM ubuntu:focal
+
+MAINTAINER EnvSys <developers@envsys.co.uk>
+
+ENV ROOTDIR /usr/local/
+
+ENV TZ=Europe/London
+RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
+
+# Load assets
+WORKDIR $ROOTDIR/
+
+# Install basic dependencies
+RUN apt-get update -y && \
+    apt-get install -y --no-install-recommends software-properties-common && \
+    add-apt-repository universe && \
+    add-apt-repository -y ppa:ubuntugis/ubuntugis-unstable && \
+    apt-get update -y && apt-get install --no-install-recommends -y \
+    build-essential \
+    libgdal-dev \
+    libhdf5-dev \
+    cmake
+
+ARG KEALIB_VER=1.4.14
+ARG PACKAGE_DIR=/usr/local/packages
+ARG KEALIB_PACKAGE_DIR=$PACKAGE_DIR/libkea_$KEALIB_VER-1
+ARG make_threads=7
+
+RUN mkdir /usr/local/src/kealib
+COPY . /usr/local/src/kealib
+
+RUN mkdir -p $KEALIB_PACKAGE_DIR/DEBIAN && mkdir -p $KEALIB_PACKAGE_DIR/etc/profile.d
+
+# Install kealib
+RUN cd /usr/local/src/kealib && \
+    cmake \
+    -D CMAKE_VERBOSE_MAKEFILE=ON \
+    -D HDF5_INCLUDE_DIR=/usr/include/hdf5/serial \
+    -D GDAL_INCLUDE_DIR=/usr/include/gdal \
+    -D LIBKEA_WITH_GDAL=ON \
+    -D BUILD_SHARED_LIBS=ON \
+    -D CMAKE_BUILD_TYPE=Release \
+    -D CMAKE_INSTALL_PREFIX=/usr \
+    . && \
+    make -j "${make_threads}" && \
+    make install DESTDIR=$KEALIB_PACKAGE_DIR && \
+    echo export GDAL_DRIVER_PATH=/usr/lib/gdalplugins >> $KEALIB_PACKAGE_DIR/etc/profile.d/kealib.sh
+
+COPY ./contrib/ubuntu/focal_ubuntugis_unstable/DEBIAN $KEALIB_PACKAGE_DIR/DEBIAN
+RUN dpkg-deb --build $KEALIB_PACKAGE_DIR
+RUN echo "The package is built and is available in the image in $PACKAGE_DIR"