#!/bin/bash

# build-python.sh

# Extracted from build-it-3-3: builds libffi, openssl (if needed), and Python.

#

# Edit the variables below to match your environment.

# ========================= Configuration =========================

# Where everything gets installed

install_top_dir=${install_top_dir:=$HOME/test-python}

# Where source tarballs are downloaded/cached

sources_dir=${sources_dir:=$HOME/autobuild/sources}

# Where build logs go

log_dir=${log_dir:=$HOME/autobuild/logs}

# Versions

python_version=python3.14

pver=3.14.2

libffi_version=3.4.6

gettext_version=0.22.5

# Set to "true" to skip building components that are already installed

skip_if_installed=true

# OpenSSL prefix — use system/Homebrew OpenSSL rather than building it.

# On macOS with Homebrew: /opt/homebrew/opt/openssl@3

# On Linux with system OpenSSL: /usr

openssl_prefix=${openssl_prefix:=/opt/homebrew/opt/openssl@3}

# ========================= Derived variables =========================

OS=$(uname)

MAKE=${MAKE:=make}

WGET="wget -nv -N -P ${sources_dir}"

generic_prefix="--prefix=$install_top_dir"

mkdir -p "$sources_dir" "$log_dir" "$install_top_dir"

export PATH=$install_top_dir/bin:$PATH

export PKG_CONFIG_PATH=$install_top_dir/lib/pkgconfig:$install_top_dir/lib64/pkgconfig:$PKG_CONFIG_PATH

export LD_LIBRARY_PATH=$install_top_dir/lib:$install_top_dir/lib64:$LD_LIBRARY_PATH

# Detect distro for platform-specific logic

dist_name=unknown

if [ $OS = Linux ] ; then

if [ -e /etc/os-release ] ; then

dist_name=$(grep ^ID= /etc/os-release | sed -e 's/ID=//' -e 's/"//g')

fi

fi

# ========================= libffi =========================

build_libffi=true

if [ "$skip_if_installed" = true ] ; then

if [ -e $install_top_dir/lib/pkgconfig/libffi.pc ] || \

[ -e $install_top_dir/include/ffi.h ] ; then

build_libffi=false

echo "libffi already installed, skipping"

fi

fi

if [ "$build_libffi" = true ] ; then

echo "========================= building libffi $libffi_version ========================="

(

unset LD_LIBRARY_PATH

${WGET} https://github.com/libffi/libffi/releases/download/v$libffi_version/libffi-$libffi_version.tar.gz

if [ -e ${sources_dir}/libffi-$libffi_version.tar.gz ] ; then

tar xf ${sources_dir}/libffi-$libffi_version.tar.gz

else

echo "ERROR: failed to get libffi tarball"

exit 1

fi

cd libffi-$libffi_version

if ./configure --prefix=$install_top_dir --enable-portable-binary --enable-shared --disable-static ; then

if $MAKE ; then

make install

fi

fi

cd -

) > $log_dir/libffi.txt 2>&1

echo "done libffi"

fi

# ========================= openssl =========================

echo "Using OpenSSL from $openssl_prefix"

if [ ! -d "$openssl_prefix/include/openssl" ] ; then

echo "WARNING: $openssl_prefix/include/openssl not found — Python may build without ssl support"

fi

# ========================= gettext (macOS only, for libintl) =========================

build_gettext=false

if [ $OS = Darwin ] ; then

if [ ! -e $install_top_dir/include/libintl.h ] ; then

build_gettext=true

fi

fi

if [ "$build_gettext" = true ] ; then

echo "========================= building gettext $gettext_version ========================="

(

unset LD_LIBRARY_PATH

${WGET} http://www.mirrorservice.org/sites/ftp.gnu.org/gnu/gettext/gettext-$gettext_version.tar.gz

tar xf $sources_dir/gettext-$gettext_version.tar.gz

cd gettext-$gettext_version

./configure --prefix=$install_top_dir --disable-java

$MAKE && make install

cd -

) > $log_dir/gettext.txt 2>&1

echo "done gettext"

else

echo "not building gettext"

fi

# ========================= Python =========================

build_python=true

if [ "$skip_if_installed" = true ] ; then

if [ -e $install_top_dir/bin/$python_version ] ; then

installed_ver=$($install_top_dir/bin/$python_version -V 2>&1)

if [ "$installed_ver" = "Python $pver" ] ; then

if $install_top_dir/bin/$python_version -c 'import ctypes' 2>/dev/null ; then

echo "$python_version ($pver) already installed with working ctypes, skipping"

build_python=false

else

echo "$python_version ctypes failure, rebuilding"

fi

else

echo "wrong Python version ($installed_ver), rebuilding"

fi

fi

fi

if [ "$build_python" = true ] ; then

echo "========================= building Python $pver ========================="

(

date

unset LD_LIBRARY_PATH

${WGET} https://www.python.org/ftp/python/$pver/Python-$pver.tgz

if [ ! -e ${sources_dir}/Python-$pver.tgz ] ; then

echo "ERROR: failed to get Python tarball"

exit 1

fi

tar xf ${sources_dir}/Python-$pver.tgz

cd Python-$pver

python_ldflags=""

python_libs=""

python_spec_flags=""

if [ "$dist_name" = fedora ] ; then

python_ldflags="LDFLAGS=-Wl,--rpath=$install_top_dir/lib"

python_libs="LIBS=-L$install_top_dir/lib64"

elif [ $OS = Linux ] ; then

python_ldflags="LDFLAGS=-Wl,--rpath=$install_top_dir/lib"

python_libs="LIBS=-L$install_top_dir/lib64"

fi

echo "INFO:: ./configure $generic_prefix --with-ensurepip=install --enable-shared" \

"--with-openssl=$openssl_prefix CPPFLAGS=-I$install_top_dir/include" \

"$python_libs $python_ldflags $python_spec_flags"

if ./configure $generic_prefix --with-ensurepip=install --enable-shared \

--with-openssl=$openssl_prefix \

CPPFLAGS=-I$install_top_dir/include \

$python_libs $python_ldflags $python_spec_flags ; then

echo "INFO:: make for python"

if $MAKE ; then

echo "INFO:: make install for python"

$MAKE install

fi

fi

cd -

) > $log_dir/python.txt 2>&1

# symlink python3 and python

if [ -e $install_top_dir/bin/$python_version ] ; then

ln -sf $install_top_dir/bin/$python_version $install_top_dir/bin/python3

ln -sf $install_top_dir/bin/python3 $install_top_dir/bin/python

fi

echo "done Python $pver"

# upgrade pip and install setuptools

echo "upgrading pip..."

(

$install_top_dir/bin/$python_version -m pip install --upgrade pip

$install_top_dir/bin/$python_version -m pip install setuptools

) > $log_dir/pip-upgrade.txt 2>&1

echo "done pip upgrade"

else

echo "not building Python"

fi

# ========================= test =========================

echo "testing $install_top_dir/bin/$python_version ..."

if $install_top_dir/bin/$python_version -c 'import ctypes; print("ctypes OK")' ; then

echo "Python is working"

else

echo "ERROR: Python not working"

exit 2

fi