VERSION=2.7.10 # for end-of-life Python2, support Ren'Py's version only

SCRIPTDIR=$(dirname $(readlink -f $0))

DESTDIR=${DESTDIR:-$SCRIPTDIR/destdir}

SETUPLOCAL=${SETUPLOCAL:-'/dev/null'}

CACHEROOT=$SCRIPTDIR

BUILD=$SCRIPTDIR/build

export QUILT_PATCHES=$(dirname $(readlink -f $0))/patches

WGET=${WGET:-wget}

unpack () {

$WGET -c https://www.python.org/ftp/python/$VERSION/Python-$VERSION.tgz -P $CACHEROOT/

mkdir -p $BUILD

cd $BUILD/

rm -rf Python-$VERSION/

tar xf $CACHEROOT/Python-$VERSION.tgz

cd Python-$VERSION/

quilt push -a

}

hostpython () {

cd $BUILD/Python-$VERSION/

mkdir -p native

(

cd native/

if [ ! -e config.status ]; then

# --without-pymalloc: prevents segfault during 'make' (sysconfigdata)

../configure \

--prefix='' \

--without-pymalloc

fi

make -j$(nproc)

make install DESTDIR=$BUILD/hostpython

)

# setuptools for 3rd-party module installers

wget -c https://files.pythonhosted.org/packages/11/0a/7f13ef5cd932a107cd4c0f3ebc9d831d9b78e1a0e8c98a098ca17b1d7d97/setuptools-41.6.0.zip -P $CACHEROOT/

cd $BUILD/hostpython/

rm -rf setuptools-41.6.0/

unzip $CACHEROOT/setuptools-41.6.0.zip

cd setuptools-41.6.0/

../bin/python setup.py install

}

emscripten () {

cd $BUILD/Python-$VERSION/

mkdir -p emscripten

(

cd emscripten/

# OPT=-Oz: TODO

# CONFIG_SITE: deals with cross-compilation https://bugs.python.org/msg136962

# not needed as emcc has a single arch: BASECFLAGS=-m32 LDFLAGS=-m32

# PATH: detect our Python, beware of conflict with emcc's python3

# don't use PYTHON_FOR_BUILD which is high-level / lots of options

# --without-threads: pthreads experimental as of 2020-05

# cf. https://emscripten.org/docs/porting/pthreads.html

# --without-signal-module: no process signals in Emscripten

# --without-pymalloc: ?

# --disable-ipv6: browser-side networking

# --disable-shared: compile statically for Emscripten perfs + incomplete PIC support

if [ ! -e config.status ]; then

CONFIG_SITE=../config.site \

BASECFLAGS='-s USE_ZLIB=1' LDFLAGS='-s USE_ZLIB=1' \

PATH=$BUILD/Python-$VERSION/native:$PATH \

emconfigure ../configure \

--host=asmjs-unknown-emscripten --build=$(../config.guess) \

--prefix='' \

--without-threads --without-pymalloc --without-signal-module --disable-ipv6 \

--disable-shared

fi

# pgen native setup

# note: need to build 'pgen' once before overwriting it with the native one

# note: PGEN=../native/Parser/pgen doesn't work, make overwrites it

emmake make Parser/pgen

\cp --preserve=mode ../native/Parser/pgen Parser/

# Modules/Setup.local

echo '*static*' > Modules/Setup.local

cat $SETUPLOCAL >> Modules/Setup.local

# drop -I/-L/-lz, we USE_ZLIB=1 (keep it in SETUPLOCAL for mock)

sed -i -e 's/^\(zlib zlibmodule.c\).*/\1/' Modules/Setup.local

emmake make Makefile

(

export PATH=$BUILD/Python-$VERSION/native:$PATH

emmake make -j$(nproc)

# setup.py install_lib doesn't respect DESTDIR

echo -e 'sharedinstall:\n\ttrue' >> Makefile

# decrease .pyo size by dropping docstrings

sed -i -e '/compileall.py/ s/ -O / -OO /' Makefile

emmake make install DESTDIR=$DESTDIR

)

# Basic trimming

# Disabled for now, better cherry-pick the files we need

#emmake make install DESTDIR=$(pwd)/destdir

#find destdir/ -name "*.py" -print0 | xargs -r0 rm

#find destdir/ -name "*.pyo" -print0 | xargs -r0 rm # only keep .pyc, .pyo apparently don't work

#find destdir/ -name "*.so" -print0 | xargs -r0 rm

#rm -rf destdir/usr/local/bin/

#rm -rf destdir/usr/local/share/man/

#rm -rf destdir/usr/local/include/

#rm -rf destdir/usr/local/lib/*.a

#rm -rf destdir/usr/local/lib/pkgconfig/

#rm -rf destdir/usr/local/lib/python2.7/test/

# Ditch .so for now, they cause an abort() with dynamic

# linking unless we recompile all of them as SIDE_MODULE-s

#rm -rf $DESTDIR/lib/python2.7/lib-dynload/

)

}

mock () {

cd $BUILD/Python-$VERSION/

mkdir -p native

(

cd native/

if [ ! -e config.status ]; then

../configure \

--prefix=$BUILD/hostpython/ \

--without-threads --without-pymalloc --without-signal-module --disable-ipv6 \

--disable-shared

fi

echo '*static*' > Modules/Setup.local

cat $SETUPLOCAL >> Modules/Setup.local

make -j$(nproc) Parser/pgen python

make -j$(nproc)

DESTDIR= make install

)

}

crosspython () {

cd $SCRIPTDIR

# Copy-link hostpython except for include/ and

# lib/python2.7/_sysconfigdata.py

for variant in static dynamic; do

rm -rf crosspython-$variant

mkdir crosspython-$variant

(

cd crosspython-$variant

for i in $(cd ../build/hostpython && ls -A); do

ln -s ../build/hostpython/$i $i

done

rm include lib

mkdir lib

for i in $(cd ../build/hostpython/lib && ls -A); do

ln -s ../../build/hostpython/lib/$i lib/$i

done

rm lib/python2.7

mkdir lib/python2.7

for i in $(cd ../build/hostpython/lib/python2.7 && ls -A); do

ln -s ../../../build/hostpython/lib/python2.7/$i lib/python2.7/$i

done

# Use Python.h configured for WASM

ln -s $DESTDIR/include include

# Use compiler settings configured for WASM

rm lib/python2.7/_sysconfigdata.*

cp -a $DESTDIR/lib/python2.7/_sysconfigdata.* lib/python2.7/

)

done

# 'CCSHARED': 'xxx',

sed -i -e "s/'CCSHARED': .*/'CCSHARED': '-fPIC -s SIDE_MODULE=1',/" \

crosspython-dynamic/lib/python2.7/_sysconfigdata.py

}

case "$1" in

unpack|hostpython|emscripten|mock|crosspython)

"$1"

;;

'')

unpack

hostpython

emscripten

crosspython

;;

*)

echo "Usage: $0 unpack|hostpython|emscripten|mock|crosspython"

exit 1

;;