Single-command FlightGear compilation for Linux

#!/bin/bash

# User-friendly single-command FlightGear compilation for Linux
# by Tomaskom
#
# This bash script handles everything needed to compile FlightGear
# as a standalone isolated installation, not colliding with any other
# FlightGear version possibly already present on the system. Everything
# is handled automatically without any user interaction and knowledge
# of the build system. The whole installation (FlightGear + its
# dependency libraries from the OpenSceneGraph and Simgear packages) is
# contained within a single folder and can be "uninstalled" simply by
# deleting it.
#
# The user must however already have some dependencies installed on
# the system, including:
# make automake cmake gcc gcc-c++ boost-devel freeglut-devel plib-devel
# openal-soft-devel (package names may slightly vary on your distro)
#
# All the user needs to supply as the input are the uncompressed folders
# with Flightgear, OpenSceneGraph and Simgear sources, together with the
# fgdata folder containing the FlightGear-data package. The folders must
# be placed in the same folder as this script and their names must be
# assigned to the variables below. To my knowledge, the Simgear version
# must exactly match the Flightgear version.
# Flightgear is installed to a newly created folder (its name is
# assigned to the INST_D variable). Don't create this folder manually,
# or the process will fail. This is to prevent overwriting any existing
# data. To restart after a failed attempt, simply delete that folder.
#
# At the end, a script usable as the fgfs executable for the just
# installed FlightGear version is created.
# The process will stop upon any error, and can be completely stopped by
# using the Ctrl+C (interrupt) signal at any time as well.



OSG_D="OpenSceneGraph-3.2.1" #name of the OpenSceneGraph source folder (extracted from zip archive)
SIMG_D="simgear-3.4.0" #name of the simgear source folder (extracted from tar.bz2 archive)
FG_D="flightgear-3.4.0" #name of the flightgear source folder (extracted from tar.bz2 archive)
FGDATA_D="fgdata" #name of the FGdata folder (extracted from tar.bz2 archive)

INST_D="FG_3-4" #will be used as the destination folder for installation
THREADS=4 #number of threads used for compilation (make -j $THREADS)



#you don't need to edit anything below this line

DIR="$PWD" #store current directory path

#folders for temporary storing of compilation stuff
OSG_BUILD="${DIR}/${INST_D}/builddir/osg"
SIMG_BUILD="${DIR}/${INST_D}/builddir/simg"
FG_BUILD="${DIR}/${INST_D}/builddir/flightgear"

#prepare some generally used commands
CMD_MAKE="make -j $THREADS"
CMD_INST="make install"

#prepare configuration command for osg, simg and fg
CMD_OSG_CMAKE="cmake $DIR/$OSG_D -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=${DIR}/${INST_D}/osg"

CMD_SIMG_CMAKE="env OSG_DIR=${DIR}/${INST_D}/osg cmake $DIR/$SIMG_D -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=${DIR}/${INST_D}/simg"

CMD_FG_CMAKE="env SIMGEAR_DIR=${DIR}/${INST_D}/simg env OSG_DIR=${DIR}/${INST_D}/osg cmake $DIR/$FG_D -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=${DIR}/${INST_D}/flightgear"

#prepare command for 5 sec wait with visual countdown
CMD_WAIT='echo -en "[     ]\r[" && sleep 1 && echo -n "." && sleep 1 && echo -n "." && sleep 1 && echo -n "." && sleep 1 && echo -n "." && sleep 1 && echo ".]"'


#create installation folder and start the build & install process
mkdir "${DIR}/${INST_D}" &&
mkdir "${DIR}/${INST_D}/builddir" &&

echo "" &&
echo "#####################################################" &&
echo "##### Configuring OpenSceneGraph build in 5s... #####" &&
echo "#####################################################" &&
eval "$CMD_WAIT" &&
mkdir "$OSG_BUILD" && cd "$OSG_BUILD" &&
eval "$CMD_OSG_CMAKE" &&
echo "" &&
echo "#############################################" &&
echo "##### Compiling OpenSceneGraph in 5s... #####" &&
echo "#############################################" &&
eval "$CMD_WAIT" &&
eval "$CMD_MAKE" &&
echo "" &&
echo "##############################################" &&
echo "##### Installing OpenSceneGraph in 5s... #####" &&
echo "##############################################" &&
eval "$CMD_WAIT" &&
eval "$CMD_INST" &&

echo "" &&
echo "##############################################" &&
echo "##### Configuring SimGear build in 5s... #####" &&
echo "##############################################" &&
eval "$CMD_WAIT" &&
mkdir "$SIMG_BUILD" && cd "$SIMG_BUILD" &&
eval "$CMD_SIMG_CMAKE" &&
echo "" &&
echo "######################################" &&
echo "##### Compiling SimGear in 5s... #####" &&
echo "######################################" &&
eval "$CMD_WAIT" &&
eval "$CMD_MAKE" &&
echo "" &&
echo "#######################################" &&
echo "##### Installing SimGear in 5s... #####" &&
echo "#######################################" &&
eval "$CMD_WAIT" &&
eval "$CMD_INST" &&

echo "" &&
echo "#################################################" &&
echo "##### Configuring FlightGear build in 5s... #####" &&
echo "#################################################" &&
eval "$CMD_WAIT" &&
mkdir "$FG_BUILD" && cd "$FG_BUILD" &&
eval "$CMD_FG_CMAKE" &&
echo "" &&
echo "#########################################" &&
echo "##### Compiling FlightGear in 5s... #####" &&
echo "#########################################" &&
eval "$CMD_WAIT" &&
eval "$CMD_MAKE" &&
echo "" &&
echo "##########################################" &&
echo "##### Installing FlightGear in 5s... #####" &&
echo "##########################################" &&
eval "$CMD_WAIT" &&
eval "$CMD_INST" &&

echo "" &&
echo "########################################################" &&
echo "##### Moving fgdata to installed location in 5s... #####" &&
echo "########################################################" &&
eval "$CMD_WAIT" &&
mkdir "${DIR}/${INST_D}/flightgear/lib" &&
mkdir "${DIR}/${INST_D}/flightgear/lib/FlightGear" &&
mv "${DIR}/${FGDATA_D}/"* "${DIR}/${INST_D}/flightgear/lib/FlightGear/" &&

echo "" &&
echo "####################################################" &&
echo "##### Cleaning up compilation folders in 5s... #####" &&
echo "####################################################" &&
eval "$CMD_WAIT" &&
rm -r "${DIR}/${INST_D}/builddir" &&

#output some useful info upon success
echo "" &&
echo "" &&
echo "#########################################################################" &&
echo "##### Congratulations, you just successfully compiled filghtgear :) #####" &&
echo "#########################################################################" &&
echo "" &&
echo "Library paths necessary for running this version of FlightGear:" &&
echo "${DIR}/${INST_D}/osg/lib[64]" &&
echo "${DIR}/${INST_D}/simg/lib[64]" &&
echo "" &&
echo "Flightgear executable location:" &&
echo "${DIR}/${INST_D}/flightgear/bin/fgfs" &&
echo "" &&
echo "So to run FlightGear from the console right away, you would use:" &&
echo "env LD_LIBRARY_PATH=$LD_LIBRARY_PATH:${DIR}/${INST_D}/osg/lib:${DIR}/${INST_D}/osg/lib64:${DIR}/${INST_D}/simg/lib:${DIR}/${INST_D}/simg/lib64 ${DIR}/${INST_D}/flightgear/bin/fgfs" &&
echo "" &&
cd $DIR &&
echo '#!/bin/bash' > runThisFG_${INST_D}.sh &&
echo 'env LD_LIBRARY_PATH=$LD_LIBRARY_PATH'":${DIR}/${INST_D}/osg/lib:${DIR}/${INST_D}/osg/lib64:${DIR}/${INST_D}/simg/lib:${DIR}/${INST_D}/simg/lib64 ${DIR}/${INST_D}/flightgear/bin/fgfs"' $@' >> runThisFG_${INST_D}.sh &&
chmod +x runThisFG_${INST_D}.sh &&
echo "A script for running this version of FlightGear without having to remember the environment variables has been written to the file runThisFG_${INST_D}.sh" &&
echo "You can use it directly as the flightgear executable for your launcher. " &&
echo "Enjoy ;)"

echo ""