termux-packages/packages/python/build.sh

TERMUX_PKG_HOMEPAGE=https://python.org/
TERMUX_PKG_DESCRIPTION="Python 3 programming language intended to enable clear programs"
TERMUX_PKG_LICENSE="PythonPL"
_MAJOR_VERSION=3.8
TERMUX_PKG_VERSION=${_MAJOR_VERSION}.3
TERMUX_PKG_SRCURL=https://www.python.org/ftp/python/${TERMUX_PKG_VERSION}/Python-${TERMUX_PKG_VERSION}.tar.xz
TERMUX_PKG_SHA256=dfab5ec723c218082fe3d5d7ae17ecbdebffa9a1aea4d64aa3a2ecdd2e795864
TERMUX_PKG_DEPENDS="gdbm, libandroid-support, libbz2, libcrypt, libffi, liblzma, libsqlite, ncurses, ncurses-ui-libs, openssl, readline, zlib"
TERMUX_PKG_RECOMMENDS="clang"
TERMUX_PKG_SUGGESTS="python-tkinter"
TERMUX_PKG_BREAKS="python2 (<= 2.7.15), python-dev"
TERMUX_PKG_REPLACES="python-dev"

# Set ac_cv_func_wcsftime=no to avoid errors such as "character U+ca0025 is not in range [U+0000; U+10ffff]"
# when executing e.g. "from time import time, strftime, localtime; print(strftime(str('%Y-%m-%d %H:%M'), localtime()))"
TERMUX_PKG_EXTRA_CONFIGURE_ARGS="ac_cv_file__dev_ptmx=yes ac_cv_file__dev_ptc=no ac_cv_func_wcsftime=no"
# Avoid trying to include <sys/timeb.h> which does not exist on android-21:
TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" ac_cv_func_ftime=no"
# Avoid trying to use AT_EACCESS which is not defined:
TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" ac_cv_func_faccessat=no"
# The gethostbyname_r function does not exist on device libc:
TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" ac_cv_func_gethostbyname_r=no"
TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" --build=$TERMUX_BUILD_TUPLE --with-system-ffi --without-ensurepip"
# Hard links does not work on Android 6:
TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" ac_cv_func_linkat=no"
# Posix semaphores are not supported on Android:
TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" ac_cv_posix_semaphores_enabled=no"
# Do not assume getaddrinfo is buggy when cross compiling:
TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" ac_cv_buggy_getaddrinfo=no"
TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" --enable-loadable-sqlite-extensions"
# Fix https://github.com/termux/termux-packages/issues/2236:
TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" ac_cv_little_endian_double=yes"
# Force disable semaphores (Android does not support them).
TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" ac_cv_func_sem_open=no"
TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" ac_cv_func_sem_timedwait=no"
TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" ac_cv_func_sem_getvalue=no"
TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" ac_cv_func_sem_unlink=no"

TERMUX_PKG_RM_AFTER_INSTALL="
lib/python${_MAJOR_VERSION}/test
lib/python${_MAJOR_VERSION}/*/test
lib/python${_MAJOR_VERSION}/*/tests
"

termux_step_pre_configure() {
	# -O3 gains some additional performance on at least aarch64.
	CFLAGS="${CFLAGS/-Oz/-O3}"

	# Needed when building with clang, as setup.py only probes
	# gcc for include paths when finding headers for determining
	# if extension modules should be built (specifically, the
	# zlib extension module is not built without this):
	CPPFLAGS+=" -I$TERMUX_STANDALONE_TOOLCHAIN/sysroot/usr/include"
	LDFLAGS+=" -L$TERMUX_STANDALONE_TOOLCHAIN/sysroot/usr/lib"
	if [ $TERMUX_ARCH = x86_64 ]; then LDFLAGS+=64; fi
}

termux_step_post_make_install() {
	(cd $TERMUX_PREFIX/bin
	 ln -sf idle${_MAJOR_VERSION} idle
	 ln -sf python${_MAJOR_VERSION} python
	 ln -sf python${_MAJOR_VERSION}-config python-config
	 ln -sf pydoc${_MAJOR_VERSION} pydoc)
	(cd $TERMUX_PREFIX/share/man/man1
	 ln -sf python${_MAJOR_VERSION}.1 python.1)
}

termux_step_post_massage() {
	# Verify that desired modules have been included:
	for module in _bz2 _curses _lzma _sqlite3 _ssl _tkinter zlib; do
		if [ ! -f "${TERMUX_PREFIX}/lib/python${_MAJOR_VERSION}/lib-dynload/${module}".*.so ]; then
			termux_error_exit "Python module library $module not built"
		fi
	done
}

termux_step_create_debscripts() {
	# Post-installation script for setting up pip.
	cat <<- POSTINST_EOF > ./postinst
	#!$TERMUX_PREFIX/bin/sh

	echo "Setting up pip..."

	# Fix historical mistake which removed bin/pip but left site-packages/pip-*.dist-info,
	# which causes ensurepip to avoid installing pip due to already existing pip install:
	if [ ! -f "$TERMUX_PREFIX/bin/pip" ]; then
	    rm -Rf ${TERMUX_PREFIX}/lib/python${_MAJOR_VERSION}/site-packages/pip-*.dist-info
	fi

	${TERMUX_PREFIX}/bin/python3 -m ensurepip --upgrade --default-pip

	exit 0
	POSTINST_EOF

	# Pre-rm script to cleanup runtime-generated files.
	cat <<- PRERM_EOF > ./prerm
	#!$TERMUX_PREFIX/bin/sh

	if [ "\$1" != "remove" ]; then
	    exit 0
	fi

	echo "Uninstalling python modules..."
	pip3 freeze 2>/dev/null | xargs pip3 uninstall -y >/dev/null 2>/dev/null
	rm -f $TERMUX_PREFIX/bin/pip $TERMUX_PREFIX/bin/pip3* $TERMUX_PREFIX/bin/easy_install $TERMUX_PREFIX/bin/easy_install-3*

	echo "Deleting remaining files from site-packages..."
	rm -Rf $TERMUX_PREFIX/lib/python${_MAJOR_VERSION}/site-packages/*

	exit 0
	PRERM_EOF

	chmod 0755 postinst prerm
}