#!/bin/bash

# Copyright 2012-2017 Audrius Kažukauskas <audrius@neutrino.lt>
# Copyright 2017, 2018, 2019, 2023, 2024  Patrick J. Volkerding, Sebeka, MN, USA
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

cd $(dirname $0) ; CWD=$(pwd)

PKGNAM=python3
SRCNAM=Python
VERSION=$(echo $SRCNAM-*.tar.xz | rev | cut -f 3- -d . | cut -f 1 -d - | rev)
BRANCH_VERSION=$(echo $VERSION | cut -f 1,2 -d . )
BUILD=${BUILD:-1}

NUMJOBS=${NUMJOBS:-" -j$(expr $(nproc) + 1) "}

# Automatically determine the architecture we're building on:
if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) export ARCH=i586 ;;
    arm*) export ARCH=arm ;;
    # Unless $ARCH is already set, use uname -m for all other archs:
       *) export ARCH=$( uname -m ) ;;
  esac
fi

# If the variable PRINT_PACKAGE_NAME is set, then this script will report what
# the name of the created package would be, and then exit. This information
# could be useful to other scripts.
if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PKGNAM-$VERSION-$ARCH-$BUILD.txz"
  exit 0
fi

TMP=${TMP:-/tmp}
PKG=$TMP/package-$PKGNAM
rm -rf $PKG
mkdir -p $TMP $PKG

# Don't set any SLKCFLAGS here, or OPT="$SLKCFLAGS" before the ./configure.
# Python gets the compile options right without any help.
if [ "$ARCH" = "i686" ]; then
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  LIBDIRSUFFIX="64"
elif [ "$ARCH" = "arm" ]; then
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "armel" ]; then
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "aarch64" ]; then
  LIBDIRSUFFIX="64"
elif [ "$ARCH" = "i586" ]; then
  LIBDIRSUFFIX=""
else
  LIBDIRSUFFIX=${LIBDIRSUFFIX:-""}
fi

# Location for Python site-packages:
SITEPK=$PKG/usr/lib${LIBDIRSUFFIX}/python${BRANCH_VERSION}/site-packages
# same as above without $PKG
TOOLSDIR=/usr/lib${LIBDIRSUFFIX}/python${BRANCH_VERSION}/site-packages

cd $TMP
rm -rf $SRCNAM-$VERSION
tar xf $CWD/$SRCNAM-$VERSION.tar.xz || exit 1
cd $SRCNAM-$VERSION || exit 1

# Fix python3 path in cgi.py.
sed -i '1s|^#.*/usr/local/bin/python|#!/usr/bin/python3|' Lib/cgi.py

## If system we're building on already has Python3 with pip in site-packages,
## ignore it and install pip anyway.
#sed -i 's|\("install",\)|\1 "--ignore-installed",|' Lib/ensurepip/__init__.py

chown -R root:root .
find -L . \
 \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
  -o -perm 511 \) -exec chmod 755 {} \+ -o \
 \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \+

./configure \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --with-platlibdir=lib${LIBDIRSUFFIX} \
  --mandir=/usr/man \
  --docdir=/usr/doc/$PKGNAM-$VERSION \
  --enable-ipv6 \
  --enable-shared \
  --with-computed-gotos \
  --enable-optimizations \
  --with-dbmliborder=gdbm:ndbm \
  --with-system-expat \
  --with-system-ffi \
  --enable-loadable-sqlite-extensions \
  --without-ensurepip \
  --with-tzpath=/usr/share/zoneinfo \
  --build=$ARCH-slackware-linux || exit 1

make $NUMJOBS || make || exit 1
make install DESTDIR=$PKG || exit 1

# PEP says we can claim this link:
( cd $PKG/usr/bin
  rm -f python
  ln -sf python${BRANCH_VERSION} python
)

# We don't want a large libpython*.a.
find $PKG -name "libpython*.a" -exec rm --verbose "{}" \;

# Make sure we have a non-platform-specific site-packages directory:
mkdir -p $PKG/usr/lib/python${BRANCH_VERSION}/site-packages

# We'll install the python-tools under site-packages.
mkdir -p $SITEPK
cp -a Tools/* $SITEPK

# Remove DOS batch/exe files.
find $PKG \( -name '*.exe' -o -name '*.bat' \) -exec rm -f '{}' \+

# Fix permissions on dynamic libraries.
find $PKG -type f -perm 555 -exec chmod 755 '{}' \+

# Install docs.
mkdir -p $PKG/usr/doc/$PKGNAM-$VERSION
cp -a README.rst LICENSE Misc $PKG/usr/doc/$PKGNAM-$VERSION
# Delete stuff that we don't need to package:
rm -f $PKG/usr/doc/$PKGNAM-$VERSION/Misc/{HISTORY,*.in,*.wpr,python.man,svnmap.txt}
mv $SITEPK/README $PKG/usr/doc/$PKGNAM-$VERSION/README.python-tools
( cd $PKG/usr/doc/$PKGNAM-$VERSION ; ln -sf $TOOLSDIR Tools )
if [ -e "$CWD/python-$VERSION-docs-html.tar.bz2" ]; then
  tar xf $CWD/python-$VERSION-docs-html.tar.bz2
  mv python-$VERSION-docs-html $PKG/usr/doc/$PKGNAM-$VERSION/docs-html
  chown -R root:root $PKG/usr/doc/$PKGNAM-$VERSION/docs-html
fi
if [ -e "$CWD/python-$VERSION-docs-text.tar.bz2" ]; then
  tar xf $CWD/python-$VERSION-docs-text.tar.bz2
  mv python-$VERSION-docs-text $PKG/usr/doc/$PKGNAM-$VERSION/docs-text
  chown -R root:root $PKG/usr/doc/$PKGNAM-$VERSION/docs-text
fi

# Fix possible incorrect permissions.
( cd $PKG
  find . -type d -exec chmod 755 "{}" \+
  find . -perm 640 -exec chmod 644 "{}" \+
  find . -perm 750 -exec chmod 755 "{}" \+
)

find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true

find $PKG/usr/man -type f -exec gzip -9 {} \+
for i in $( find $PKG/usr/man -type l ) ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc

cd $PKG
/sbin/makepkg -l y -c n $TMP/python3-$VERSION-$ARCH-$BUILD.txz