sage-get-system-packages

#!/bin/sh

SYSTEM=$1
if [ -z "$SYSTEM" ]; then
   echo >&2 "usage: $0 {auto|debian|arch|conda|pip|...} SPKGS..."
   exit 1
fi
shift
SPKGS="$*"
#
if [ -z "$SAGE_ROOT" ]; then
    SAGE_ROOT=`pwd`
fi

case "$SYSTEM" in
    install-requires)
        # Collect version_requirements.txt (falling back to requirements.txt) and output it in the format
        # needed by setup.cfg [options] version_requirements=
        SYSTEM_PACKAGES_FILE_NAMES="version_requirements.txt requirements.txt"
        STRIP_COMMENTS="sed s/#.*//;/^[[:space:]]*$/d;"
        COLLECT=
        ;;
    install-requires-toml)
        # Collect version_requirements.txt (falling back to requirements.txt) and output it in the format
        # needed by pyproject.toml [build-system] requires=
        SYSTEM_PACKAGES_FILE_NAMES="version_requirements.txt requirements.txt"
        STRIP_COMMENTS="sed s/#.*//;/^[[:space:]]*$/d;s/^/'/;s/$/',/;"
        COLLECT=
        ;;
    pip)
        SYSTEM_PACKAGES_FILE_NAMES="requirements.txt version_requirements.txt"
        STRIP_COMMENTS='sed s/#.*//;s/[[:space:]]//g;'
        COLLECT=echo
        ;;
    *)
        if [ "$SYSTEM" = auto ]; then
            SYSTEM=$(sage-guess-package-system 2>/dev/null)
            if [ "$SYSTEM" = unknown ]; then
                echo >&2 "unknown package system"
                exit 1
            fi
        fi
        SYSTEM_PACKAGES_FILE_NAMES="distros/$SYSTEM.txt"
        STRIP_COMMENTS="sed s/#.*//;s/\${PYTHON_MINOR}/${PYTHON_MINOR}/g"
        COLLECT=echo
        ;;
esac
for PKG_BASE in $SPKGS; do

    case "$SYSTEM:$ENABLE_SYSTEM_SITE_PACKAGES" in
        install-requires*|pip*)
            # This is output for installation of packages into a Python environment.
            # So it's OK to use any Python packages.
            ;;
        *:)
            # --enable-system-site-packages was NOT passed to configure
            # (or script was run outside of the sage-build-env).
            #
            # Skip this package if it uses the SAGE_PYTHON_PACKAGE_CHECK macro.
            #
            SPKG_CONFIGURE="${SAGE_ROOT}/build/pkgs/${PKG_BASE}/spkg-configure.m4"
            if grep -q SAGE_PYTHON_PACKAGE_CHECK "${SPKG_CONFIGURE}" 2>/dev/null;
            then
                continue
            fi
            ;;
        *)
            # --enable-system-site-packages was passed to configure.
            # So any package (Python, non-Python) is fine.
            ;;
    esac

    for NAME in $SYSTEM_PACKAGES_FILE_NAMES; do
        SYSTEM_PACKAGES_FILE="$SAGE_ROOT"/build/pkgs/$PKG_BASE/$NAME
        if [ -f $SYSTEM_PACKAGES_FILE ]; then
           if [ -z "$COLLECT" ]; then
              ${STRIP_COMMENTS} $SYSTEM_PACKAGES_FILE
           else
              $COLLECT $(${STRIP_COMMENTS} $SYSTEM_PACKAGES_FILE)
           fi
           break
        fi
    done
done