#!/bin/bash
ulimit -s unlimited
shopt -s extglob

# python3.SlackBuild
# Heavily based on the original Slackware build scripts,
# Modified by Stuart Winter for Slackware ARM.
#
# Copyright 2012-2017 Audrius Kažukauskas <audrius@neutrino.lt>
# Copyright 2017  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.

# Record toolchain & other info for the build log:
slackbuildinfo

# Paths to skeleton port's source & real Slackware source tree:
slackset_var_cwds

# Temporary build locations:
export TMPBUILD=$TMP/build-$PKGNAM
export PKG=$TMP/package-$PKGNAM
mkpkgdirs # Delete & re-create temporary directories then cd into $TMPBUILD

BRANCH_VERSION=$( echo $VERSION | cut -f 1,2 -d . )
# Location for Python site-packages:
SITEPK=$PKG/usr/lib${LIBDIRSUFFIX}/python${BRANCH_VERSION}/site-packages
# same as above without $PKG
TOOLSDIR=/usr/lib${LIBDIRSUFFIX}/python${BRANCH_VERSION}/site-packages

# Extract source:
tar xvvf $CWD/Python-$VERSION.tar.!(*sign|*asc|*sig)
cd Python-$VERSION || exit 1
slackhousekeeping

zcat $CWD/python3.readline.set_pre_input_hook.diff.gz | patch -p1 --verbose || exit 1
# We don't want a large libpython*.a.
zcat $CWD/python3.no-static-library.diff.gz | patch -p1 --verbose || exit 1

if [[ "${ARCH}" =~ (x86_64|aarch64) ]]; then
   # Install to lib64 instead of lib.
   zcat $CWD/python.sysconfig.py.x86_64.diff.gz | patch -p1 --verbose || exit 1
   zcat $CWD/python3.distutils.x86_64.diff.gz | patch -p1 --verbose || exit 1
   zcat $CWD/python3.setup.py.x86_64.diff.gz | patch -p1 --verbose || exit 1
fi

# 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

# Configure:
# Regenerate the configure script and pyconfig.h.in
autoconf
autoheader

# No -O3 thanks.
#fgrep -lr -- '-O3 ' . | xargs sed -i 's?-O3 ?-O2 ?g'

EXTRA_CFLAGS="-O0 -Wno-cpp" \
CFLAGS="$SLKCFLAGS -D_GNU_SOURCE -fPIC -fwrapv" \
CXXFLAGS="$SLKCFLAGS -D_GNU_SOURCE -fPIC -fwrapv" \
CFLAGS_NODIST="$CFLAGS" \
LDFLAGS="-Wl,-z,relro -Wl,--as-needed -Wl,-z,now -g" \
./configure \
   --prefix=/usr \
   --libdir=/usr/lib${LIBDIRSUFFIX} \
   --with-platlibdir=lib${LIBDIRSUFFIX} \
   --mandir=/usr/man \
   --docdir=/usr/doc/$PKGNAM-$VERSION \
   --enable-ipv6 \
   --enable-shared \
   --with-system-expat \
   --with-system-ffi \
   --enable-loadable-sqlite-extensions \
   --without-ensurepip \
   --host=${SLK_ARCH_HOST} \
   --build=${SLK_ARCH_BUILD} || failconfig

# Build:
make V=1 VERBOSE=1 $NUMJOBS || make V=1 VERBOSE=1 || failmake

# Install into package framework:
make install DESTDIR=$PKG || failinstall

# Remove to avoid overwriting a copy from Python2.
rm -f $PKG/usr/bin/2to3

# 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 '{}' \;

# Add documentation:
mkdir -vpm755 $PKG/usr/doc/$PKGNAM-$VERSION
cp -fav \
  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 -vsf $TOOLSDIR Tools )
if [ -e "$CWD/python-$VERSION-docs-html.tar.bz2" ]; then
  tar xf $CWD/python-$VERSION-docs-html.tar.bz2
  mv -fv python-$VERSION-docs-html $PKG/usr/doc/$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 -fv python-$VERSION-docs-text $PKG/usr/doc/$PKGNAM-$VERSION/docs-text
fi
#changelogliposuction ChangeLog $PKGNAM $VERSION # Trim down a "ChangeLog" file

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

# Apply generic Slackware packaging policies:
cd $PKG
slackstripall   # strip all .a archives and all ELFs
#slackstriprpaths     # strip rpaths
slack_delete_lafiles # delete usr/lib{,64}/*.la
slackgzpages -i # compress man & info pages and delete usr/info/dir
slackslack      # set standard Slackware file/dir permissions and ownerships
slackdesc       # install slack-desc and doinst.sh
slackmp         # run makepkg -l y -c n

# Perform any final checks on the package:
cd $PKG
slackhlinks     # search for any hard links