Switch from miniconda to miniforge

# {{{ download and install

MINICONDA_VERSION=3

MINICONDA_INSTALL_DIR=.miniconda${MINICONDA_VERSION}

MINIFORGE_VERSION=3

MINIFORGE_INSTALL_DIR=.miniforge${MINIFORGE_VERSION}

MINICONDA_INSTALL_SH=Miniconda${MINICONDA_VERSION}-latest-${PLATFORM}-x86_64.sh

curl -O "https://repo.anaconda.com/miniconda/$MINICONDA_INSTALL_SH"

MINIFORGE_INSTALL_SH=Miniforge3-$PLATFORM-x86_64.sh

curl -O "https://github.com/conda-forge/miniforge/releases/latest/download/$MINIFORGE_INSTALL_SH"

rm -Rf "$MINICONDA_INSTALL_DIR"

rm -Rf "$MINIFORGE_INSTALL_DIR"

bash "$MINICONDA_INSTALL_SH" -b -p "$MINICONDA_INSTALL_DIR"

bash "$MINIFORGE_INSTALL_SH" -b -p "$MINIFORGE_INSTALL_DIR"

# }}}

# {{{ set up testing environment

PATH="$MINICONDA_INSTALL_DIR/bin/:$PATH" conda update conda --yes --quiet

PATH="$MINIFORGE_INSTALL_DIR/bin/:$PATH" conda update conda --yes --quiet

PATH="$MINICONDA_INSTALL_DIR/bin/:$PATH" conda update --all --yes --quiet

PATH="$MINIFORGE_INSTALL_DIR/bin/:$PATH" conda update --all --yes --quiet

PATH="$MINICONDA_INSTALL_DIR/bin:$PATH" conda env create --file "$CONDA_ENVIRONMENT" --name testing

PATH="$MINIFORGE_INSTALL_DIR/bin:$PATH" conda env create --file "$CONDA_ENVIRONMENT" --name testing

source "$MINICONDA_INSTALL_DIR/bin/activate" testing

source "$MINIFORGE_INSTALL_DIR/bin/activate" testing

# https://github.com/conda-forge/ocl-icd-feedstock/issues/11#issuecomment-456270634

rm -f .miniconda3/envs/testing/etc/OpenCL/vendors/system-*.icd

rm -f $MINIFORGE_INSTALL_DIR/envs/testing/etc/OpenCL/vendors/system-*.icd

# https://gitlab.tiker.net/inducer/pytential/issues/112

rm -f .miniconda3/envs/testing/etc/OpenCL/vendors/apple.icd

rm -f $MINIFORGE_INSTALL_DIR/envs/testing/etc/OpenCL/vendors/apple.icd

# https://github.com/pypa/pip/issues/5345#issuecomment-386443351

export XDG_CACHE_HOME=$HOME/.cache/$CI_RUNNER_ID