#!/bin/sh
# -*- mode: shell-script; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
#
# Copyright (C) 2012, 2013, 2016 O.S. Systems Software LTDA.
# Authored-by:  Otavio Salvador <otavio@ossystems.com.br>
# Copyright (C) 2018 kernel concepts GmbH
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# 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.  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; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Add options for the script
# Copyright (C) 2013 Freescale Semiconductor, Inc.

CWD=`pwd`
PROGNAME="setup-environment"

usage()
{
    echo -e "
Usage: MACHINE=<machine> DISTRO=<distro> source $PROGNAME <build-dir>
Usage:                                   source $PROGNAME <build-dir>
    <machine>    machine name
    <distro>     distro name
    <build-dir>  build directory

The first usage is for creating a new build directory. In this case, the
script creates the build directory <build-dir>, configures it for the
specified <machine> and <distro>, and prepares the calling shell for running
bitbake on the build directory.

The second usage is for using an existing build directory. In this case,
the script prepares the calling shell for running bitbake on the build
directory <build-dir>. The build directory configuration is unchanged.
"

    ls yocto/*/conf/machine/*.conf > /dev/null 2>&1
#    ls sources/meta-freescale-distro/conf/distro/fslc-*.conf > /dev/null 2>&1
    if [ $? -eq 0 ]; then
        echo -e "
Supported machines: `echo; ls conf/*/conf/machine/*.conf \
| sed s/\.conf//g | sed -r 's/^.+\///' | xargs -I% echo -e "\t%"`

Available Poky's distros: `echo; ls yocto/poky/meta-poky/conf/distro/*.conf \
| sed s/\.conf//g | sed -r 's/^.+\///' | xargs -I% echo -e "\t%"`

Examples:

- To create a new Yocto build directory:
  $ MACHINE=tx6q-xxxx DISTRO=poky . $PROGNAME build

- To use an existing Yocto build directory:
  $ . $PROGNAME build
"
    fi
}

clean_up()
{
   unset LIST_MACHINES VALID_MACHINE
   unset CWD TEMPLATES SHORTOPTS LONGOPTS ARGS PROGNAME
   unset generated_config updated
   unset MACHINE SDKMACHINE DISTRO OEROOT
}

# source default sdk configuration
if [ -e sdkdefaults.conf ]; then
. sdkdefaults.conf
fi


# get command line options
SHORTOPTS="h"
LONGOPTS="help"

ARGS=$(getopt --options $SHORTOPTS  \
  --longoptions $LONGOPTS --name $PROGNAME -- "$@" )
# Print the usage menu if invalid options are specified
if [ $? != 0 -o $# -lt 1 ]; then
   usage && clean_up
   return 1
fi

eval set -- "$ARGS"
while true;
do
    case $1 in
        -h|--help)
           usage
           clean_up
           return 0
           ;;
        --)
           shift
           break
           ;;
    esac
done

if [ "$(whoami)" = "root" ]; then
    echo "ERROR: do not use the BSP as root. Exiting..."
fi

if [ ! -e $1/conf/local.conf.sample ]; then
    build_dir_setup_enabled="true"
else
    build_dir_setup_enabled="false"
fi

if [ "$build_dir_setup_enabled" = "true" ] && [ -z "$MACHINE" ]; then
    usage
    echo -e "ERROR: You must set MACHINE when creating a new build directory."
    clean_up
    return 1
fi

if [ -z "$SDKMACHINE" ]; then
    SDKMACHINE='i686'
fi

if [ "$build_dir_setup_enabled" = "true" ] && [ -z "$DISTRO" ]; then
    usage
    echo -e "ERROR: You must set DISTRO when creating a new build directory."
    clean_up
    return 1
fi


OEROOT=$PWD/yocto/poky
if [ -e $PWD/yocto/oe-core ]; then
    OEROOT=$PWD/yocto/oe-core
fi

. $OEROOT/oe-init-build-env $CWD/$1 > /dev/null

# if conf/local.conf not generated, no need to go further
if [ ! -e conf/local.conf ]; then
    clean_up && return 1
fi

# Clean up PATH, because if it includes tokens to current directories somehow,
# wrong binaries can be used instead of the expected ones during task execution
export PATH="`echo $PATH | sed 's/\(:.\|:\)*:/:/g;s/^.\?://;s/:.\?$//'`"

generated_config=
if [ "$build_dir_setup_enabled" = "true" ]; then
    mv conf/local.conf conf/local.conf.sample

    # Generate the local.conf based on the Yocto defaults
    TEMPLATES=$CWD/yocto/meta-kc-bsp/conf
    grep -v '^#\|^$' conf/local.conf.sample > conf/local.conf
    cat >> conf/local.conf <<EOF

DL_DIR ?= "\${BSPDIR}/downloads/"
EOF
    # Change settings according environment
    sed -e "s,MACHINE ?=.*,MACHINE ?= '$MACHINE',g" \
        -e "s,DISTRO ?=.*,DISTRO ?= '$DISTRO',g" \
        -i conf/local.conf

    cp $TEMPLATES/* conf/

    for s in $HOME/.oe $HOME/.yocto; do
        if [ -e $s/site.conf ]; then
            echo "Linking $s/site.conf to conf/site.conf"
            ln -s $s/site.conf conf
        fi
    done

    generated_config=1
fi

cat <<EOF

Welcome to kernel concepts custom BSP

The Yocto Project has extensive documentation about OE including a
reference manual which can be found at:
    http://yoctoproject.org/documentation

For more information about OpenEmbedded see their website:
    http://www.openembedded.org/

You can now run 'bitbake <target>'

Common targets are:

EOF

if [ -z "$COMMON_TARGETS" ]; then

echo    core-image-minimal
echo    meta-toolchain

else

echo "$COMMON_TARGETS"

fi


if [ -n "$generated_config" ]; then
    cat <<EOF
Your build environment has been configured with:

    MACHINE=$MACHINE
    DISTRO=$DISTRO

EOF
else
    echo "Your configuration files at $1 have not been touched."
    echo
fi

clean_up