#!/bin/sh

# SlackBuild script for wayland, by melikamp.

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful, but
# without any warranty; without even the implied warranty of
# merchantability or fitness for a particular purpose. Compiling,
# interpreting, executing or merely reading the text of the program
# may result in lapses of consciousness and/or very being, up to and
# including the end of all existence and the Universe as we know it.
# See the GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program (most likely, a file named COPYING).  If
# not, see <http://www.gnu.org/licenses/>.

WLD_BUILD=$(pwd)
WLD=$WLD_BUILD/install
LD_LIBRARY_PATH=$WLD/lib
PKG_CONFIG_PATH=$WLD/lib/pkgconfig/:$WLD/share/pkgconfig/
ACLOCAL="aclocal -I $WLD/share/aclocal"

export WLD LD_LIBRARY_PATH PKG_CONFIG_PATH ACLOCAL

set -e

cat <<EOF
This script will pull the sources into $WLD_BUILD, then build and
install wayland, weston, and xwayland into $WLD.  It is intended to be
run as non-root (as is weston). It was tested only in Slackware 14.0
x64, and only with intel driver, so your mileage may vary.  We also
assume you have a full install of Slackware 14.0.

Before you can run wayland + weston, you must take care of configuration
and dependencies. (1) is required to build weston, as weird as it
sounds (we blame pango), and the rest are required to run, just as the
upstream documentation says. If you find a way not to bump cairo,
please drop us a line.

(1) You need to upgrade cairo before you build.  Run this to download
it, edit the slackbuild to configure with --enable-gl, then upgrade as
usual.

mkdir cairo ; cd cairo
wget http://mirrors.slackware.com/slackware/slackware64-current/source/l/cairo/cairo-1.12.14.tar.xz
wget http://mirrors.slackware.com/slackware/slackware64-current/source/l/cairo/cairo.SlackBuild
wget http://mirrors.slackware.com/slackware/slackware64-current/source/l/cairo/paredown.sh
wget http://mirrors.slackware.com/slackware/slackware64-current/source/l/cairo/slack-desc

(2) You will need Linux-PAM, which you can build with a script. Run
this to pull the source and the slackbuild, then install as usual.

wget --reject="index.html*" --level 1 -r -nH --cut-dirs 5 --no-parent \\
http://slackbuilds.org/mirror/slackware/slackware-14.0/extra/source/pam \\
http://slackbuilds.org/mirror/slackware/slackware-14.0/extra/source/pam/patches

(3) You will also probably need a config file for pam. At least, we
couldn't make it work without it, so we stole one from Debian 7. Put
the file "other" into /etc/pam.d/

(4) You will need to create a group and add yourself to it:

su -
groupadd weston-launch
usermod -a -G weston-launch YOUR_NAME_HERE

(5) You will need to add this to your .bash_profile or whatever is
your login shell start-up file (no need to re-log, and no point doing
this in a running session, as weston starts a brand-new login shell):

if test -z "\${XDG_RUNTIME_DIR}"; then
    export XDG_RUNTIME_DIR=/tmp/\${UID}-runtime-dir
    if ! test -d "\${XDG_RUNTIME_DIR}"; then
        mkdir "\${XDG_RUNTIME_DIR}"
        chmod 0700 "\${XDG_RUNTIME_DIR}"
    fi
fi

Proceed? (y/n)
EOF
read -N 1 foo ; echo
if [[ $foo != y ]] ; then exit ; fi

rm -rf $WLD || true
mkdir -p $WLD/share/aclocal

# parameters: dir name, url, [options other than --prefix]*
git_make_install() { (
	cd $WLD_BUILD
	rm -rf $1 || true
	git clone --depth 1 $2
	cd $1
	shift 2
	./autogen.sh --prefix=$WLD $@
	make
	make install
) }

# Wayland libraries
git_make_install wayland git://anongit.freedesktop.org/wayland/wayland

# Mesa
git_make_install drm git://anongit.freedesktop.org/git/mesa/drm
git_make_install mesa git://anongit.freedesktop.org/mesa/mesa \
    --enable-gles2 --disable-gallium-egl \
    --with-egl-platforms=x11,wayland,drm --enable-gbm --enable-shared-glapi \
    --with-gallium-drivers=r300,r600,swrast,nouveau

# libxkbcommon
git_make_install libxkbcommon git://github.com/xkbcommon/libxkbcommon \
    --with-xkb-config-root=/usr/share/X11/xkb

# cairo-gl
git_make_install pixman git://anongit.freedesktop.org/pixman
git_make_install cairo git://anongit.freedesktop.org/cairo --enable-gl --enable-xcb

# libunwind
(   cd $WLD_BUILD
    rm -rf libunwind || true
    git clone --depth 1 git://git.sv.gnu.org/libunwind
    cd libunwind
    autoreconf -i
    ./configure --prefix=$WLD
    make
    make install
)

# Weston and demo applications
(   cd $WLD_BUILD
    rm -rf weston || true
    git clone --depth 1 git://anongit.freedesktop.org/wayland/weston
    cd weston
    ./autogen.sh --prefix=$WLD --enable-clients
    make
# We don't want to chown root in this install, as it will break things
# for non-root installers.
    sed -i 's/chown root/#chown root/' src/Makefile
    sed -i 's/chmod u+s/#chmod u+s/' src/Makefile
    make install
)

# X.org
git_make_install xserver "git://anongit.freedesktop.org/xorg/xserver -b xwayland-1.12"

# DDX - Any non-empty subset should be OK. We only tested intel.
git_make_install xf86-video-intel "git://anongit.freedesktop.org/xorg/driver/xf86-video-intel -b xwayland"
git_make_install xf86-video-ati "https://github.com/RAOF/xf86-video-ati -b xwayland"
# wlshm and nouveau didn't build right away, so we gave up.
#git_make_install xf86-video-wlshm git://people.freedesktop.org/~iksaif/xf86-video-wlshm
#git_make_install xf86-video-nouveau "https://github.com/RAOF/xf86-video-nouveau -b xwayland"

# Paths
mkdir -p $WLD/share/X11/xkb/rules
ln -s /usr/share/X11/xkb/rules/evdev $WLD/share/X11/xkb/rules/
ln -s /usr/bin/xkbcomp $WLD/bin/

# Ta-daa
cd $WLD_BUILD

gencfg() {
    cat > $HOME/.config/weston.ini <<EOF
[core]
modules=desktop-shell.so,xwayland.so

[shell]
background-image=/usr/share/wallpapers/Blue_Curl/contents/images/1920x1200.jpg
background-color=0xff002244
#background-type=tile
panel-color=0x500000ff
locking=true
animation=zoom
#binding-modifier=ctrl
#num-workspaces=6
cursor-theme=whiteglass
cursor-size=24

#lockscreen-icon=/usr/share/icons/gnome/256x256/actions/lock.png
#lockscreen=/usr/share/backgrounds/gnome/Garden.jpg
#homescreen=/usr/share/backgrounds/gnome/Blinds.jpg
#animation=fade

[launcher]
icon=/usr/share/icons/gnome/24x24/apps/utilities-terminal.png
path=$WLD/bin/weston-terminal

[screensaver]
# Uncomment path to disable[SIC] screensaver
path=$WLD/libexec/weston-screensaver
duration=600

[input-method]
path=$WLD/libexec/weston-keyboard

#[output]
#name=LVDS1
#mode=1680x1050
#transform=90
#icc_profile=/usr/share/color/icc/colord/Bluish.icc

#[output]
#name=VGA1
#mode=173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync
#transform=flipped

#[output]
#name=X1
#mode=1024x768
#transform=flipped-270

EOF
}

cat <<EOF
There is one more thing we need to do.

Sample weston configuration is in $WLD_BUILD/weston/weston.ini, but it almost
certainly needs editing. Do you want us to generate and install a config file
~/.config/weston.ini? (y/n)
EOF

read -N 1 foo ; echo
if [[ $foo == y ]] ; then gencfg ; fi

cat <<EOF

Before you can start weston with

$WLD/bin/weston-launch

you need to change permissions on weston-launch:

su -
chown root $WLD/bin/weston-launch
chmod +s $WLD/bin/weston-launch

Clients are in $WLD/bin and $WLD_BUILD/weston/clients

Enjoy!
EOF

#
# /etc/pam.d/other - specify the PAM fallback behaviour
#
# Note that this file is used for any unspecified service; for example
#if /etc/pam.d/cron  specifies no session modules but cron calls
#pam_open_session, the session module out of /etc/pam.d/other is
#used.  If you really want nothing to happen then use pam_permit.so or
#pam_deny.so as appropriate.

# We fall back to the system default in /etc/pam.d/common-*
# 

#
# /etc/pam.d/common-auth - authentication settings common to all services
#
# This file is included from other service-specific PAM config files,
# and should contain a list of the authentication modules that define
# the central authentication scheme for use on the system
# (e.g., /etc/shadow, LDAP, Kerberos, etc.).  The default is to use the
# traditional Unix authentication mechanisms.
#
# As of pam 1.0.1-6, this file is managed by pam-auth-update by default.
# To take advantage of this, it is recommended that you configure any
# local modules either before or after the default block, and use
# pam-auth-update to manage selection of other modules.  See
# pam-auth-update(8) for details.

# here are the per-package modules (the "Primary" block)
auth	[success=1 default=ignore]	pam_unix.so nullok_secure
# here's the fallback if no module succeeds
auth	requisite			pam_deny.so
# prime the stack with a positive return value if there isn't one already;
# this avoids us returning an error just because nothing sets a success code
# since the modules above will each just jump around
auth	required			pam_permit.so
# and here are more per-package modules (the "Additional" block)
# end of pam-auth-update config

#
# /etc/pam.d/common-account - authorization settings common to all services
#
# This file is included from other service-specific PAM config files,
# and should contain a list of the authorization modules that define
# the central access policy for use on the system.  The default is to
# only deny service to users whose accounts are expired in /etc/shadow.
#
# As of pam 1.0.1-6, this file is managed by pam-auth-update by default.
# To take advantage of this, it is recommended that you configure any
# local modules either before or after the default block, and use
# pam-auth-update to manage selection of other modules.  See
# pam-auth-update(8) for details.
#

# here are the per-package modules (the "Primary" block)
account	[success=1 new_authtok_reqd=done default=ignore]	pam_unix.so 
# here's the fallback if no module succeeds
account	requisite			pam_deny.so
# prime the stack with a positive return value if there isn't one already;
# this avoids us returning an error just because nothing sets a success code
# since the modules above will each just jump around
account	required			pam_permit.so
# and here are more per-package modules (the "Additional" block)
# end of pam-auth-update config

#
# /etc/pam.d/common-password - password-related modules common to all services
#
# This file is included from other service-specific PAM config files,
# and should contain a list of modules that define the services to be
# used to change user passwords.  The default is pam_unix.

# Explanation of pam_unix options:
#
# The "sha512" option enables salted SHA512 passwords.  Without this option,
# the default is Unix crypt.  Prior releases used the option "md5".
#
# The "obscure" option replaces the old `OBSCURE_CHECKS_ENAB' option in
# login.defs.
#
# See the pam_unix manpage for other options.

# As of pam 1.0.1-6, this file is managed by pam-auth-update by default.
# To take advantage of this, it is recommended that you configure any
# local modules either before or after the default block, and use
# pam-auth-update to manage selection of other modules.  See
# pam-auth-update(8) for details.

# here are the per-package modules (the "Primary" block)
password	[success=1 default=ignore]	pam_unix.so obscure sha512
# here's the fallback if no module succeeds
password	requisite			pam_deny.so
# prime the stack with a positive return value if there isn't one already;
# this avoids us returning an error just because nothing sets a success code
# since the modules above will each just jump around
password	required			pam_permit.so
# and here are more per-package modules (the "Additional" block)
password	optional	pam_gnome_keyring.so 
# end of pam-auth-update config

#
# /etc/pam.d/common-session - session-related modules common to all services
#
# This file is included from other service-specific PAM config files,
# and should contain a list of modules that define tasks to be performed
# at the start and end of sessions of *any* kind (both interactive and
# non-interactive).
#
# As of pam 1.0.1-6, this file is managed by pam-auth-update by default.
# To take advantage of this, it is recommended that you configure any
# local modules either before or after the default block, and use
# pam-auth-update to manage selection of other modules.  See
# pam-auth-update(8) for details.

# here are the per-package modules (the "Primary" block)
session	[default=1]			pam_permit.so
# here's the fallback if no module succeeds
session	requisite			pam_deny.so
# prime the stack with a positive return value if there isn't one already;
# this avoids us returning an error just because nothing sets a success code
# since the modules above will each just jump around
session	required			pam_permit.so
# and here are more per-package modules (the "Additional" block)
session	required	pam_unix.so 
session	optional			pam_ck_connector.so nox11
# end of pam-auth-update config