Shell command sequence to compile and install mypaint from GIT, as of november 2023, with Python 3.11

build.sh

# this is not a script - more like a curated command sequence from my history
# after succesfully installing mypaint.

export $PREFIX=/home/<user>/mypaint-git
sudo dnf install swig  # fedora/redhat specific. One also will need Python3-dev and other Linux packages
git clone https://github.com/mypaint/mypaint.git
cd mypaint

~/.pyenv/versions/3.11.4/bin/python -m venv env311  # or use other cPython interpreter of preference

cd ..
git clone https://github.com/mypaint/libmypaint
cd libmypaint/
./autogen.sh --prefix=$PREFIX
./configure --prefix=$PREFIX
make
make install
sudo ldconfig $PREFIX/lib

cd ..
git clone https://github.com/mypaint/mypaint-brushes
cd mypaint-brushes/
./autogen.sh --prefix=$PREFIX
./configure --prefix=$PREFIX
make  # may do nothing
make install # this, yes, will copy the assets over
cd ../mypaint

pip install numpy
pip install PyGObject
export PKG_CONFIG_PATH=$PREFIX/share/pkgconfig/:$PREFIX/lib/pkgconfig:$PKG_CONFIG_PATH
export LD_LIBRARY_PATH=$PREFIX/lib
export GI_TYPELIB_PATH=$PREFIX/lib/girepository-1.0/
python setup.py build
python setup.py managed_install --prefix=$PREFIX