configure

#!/bin/sh

if [ "$#" != "0" ];
then
   echo "usage: $0\n"
   echo "Running this script does the following:"
   echo "   1. Determine reasonable install locations, based on your OS."
   echo "   2. Check that build dependencies are installed and available."
   echo "   3. Check if any media backends are available.  At least one"
   echo "      is required to run vitunes."
   echo "   4. Builds a 'config.mk' file (used by Makefile) with the"
   echo "      above information."
   exit 1
fi


###
### Determine install locations, based on the OS.  The *BSD ones are OK, but
### I'm not certain what's best for Linux or OSX.
###

echo "DETERMINING INSTALL LOCATIONS..."

# default defaults
PREFIX="/usr/local"

# break based on OS
/bin/echo -n "   Detecting OS...  "
os=`uname`
case ${os} in
"FreeBSD"|"NetBSD"|"OpenBSD")
   # no need to change prefix here
   echo "Found ${os}."
   echo "   Setting install prefix to '${PREFIX}'."
   ;;
"Darwin")
   # Should we set PREFIX to /usr here?
   echo "Found Mac OS X (Darwin)."
   echo "   Setting install prefix to '${PREFIX}'."
   ;;
"Linux")
   PREFIX="/usr"
   echo "Found Linux."
   echo "   Setting install prefix to '${PREFIX}'."
   ;;
*)
   echo "Unknown."
   echo "   Will set install prefix to '${PREFIX}'."
   ;;
esac

BINDIR="${PREFIX}/bin"
MANDIR="${PREFIX}/man/man1"

echo "   When you run 'make install', parts of vitunes will be installed to"
echo "   the following locations:"
echo "      executable:   ${BINDIR}"
echo "        man-page:   ${MANDIR}"
echo "   If you wish to change these, edit the relevant variables in config.mk"
echo


###
### Detect build dependency: TagLib
###

/bin/echo -n "CHECKING BUILD DEPENDENCY: TagLib... "
HaveTaglib=0

# Check for taglib
which taglib-config > /dev/null 2>&1
if [ 0 -eq $? ];
then
   echo "FOUND"
   HaveTaglib=1
   TAGLIB_BLOCK="
# taglib-config found.  Using to determine CFLAGS and LDFLAGS
TAGLIB_CFLAGS=\`taglib-config --cflags\`
TAGLIB_LIBS=\`taglib-config --libs\` -ltag_c
"
fi

# No taglib.  Alert but continue.
if [ 0 -eq ${HaveTaglib} ];
then
   echo "NOT FOUND!"
   echo "   ERROR: TagLib must be installed to build vitunes."
   echo "   See TagLib website at http://taglib.github.com/ for source."
   echo "   Will continue with configuratio anyway..."
fi

echo


###
### Detect media backends (at least one should be available)
###

echo "CHECKING FOR MEDIA BACKENDS... "
HaveMediaBackend=0

# Check for mplayer
which mplayer > /dev/null 2>&1
if [ 0 -eq $? ];
then
   HaveMediaBackend=1
   echo "   Found mplayer"
fi

# Check for gstreamer
gstreamer=gstreamer-1.0
pkg-config --exists ${gstreamer} > /dev/null 2>&1
if [ 0 -eq $? ];
then
   HaveMediaBackend=1
   echo "   Found gstreamer"
   GSTREAMER_BLOCK="
# gstreamer library (${gstreamer}) detected by pkg-config
GSTREAMER_CFLAGS  =\`pkg-config ${gstreamer} --cflags\` -DENABLE_GSTREAMER
GSTREAMER_LIBS    =\`pkg-config ${gstreamer} --libs\`
GSTREAMER_OBJS    = gstplayer.o
"
fi

# None found.  Alert but continue.
if [ 0 -eq ${HaveMediaBackend} ];
then
   echo "   ERROR: No media backound found."
   echo "   In order for vitunes to play music, either mplayer or gstreamer"
   echo "   must be installed.  You can install mplayer at any time and"
   echo "   vitunes will detect and use that.  But to enable gstreamer support,"
   echo "   you must first install gstreamer, and then re-run this script."
fi

echo


###
### Begin building config.mk
###

echo "BUILDING config.mk..."

# backup any existing config
if [ -f config.mk ];
then
   backup=config.mk.bak
   echo "   Backing up existing config.mk to ${backup}"
   cp config.mk ${backup}
fi

# start writing
now=`date "+%Y-%m-%d at %H:%M:%S" 2> /dev/null`
cat > config.mk <<EOF
# This file was generated by the 'configure.sh' script on ${now}.
# Its contents should probably not be modified directly (if they should,
# please contact the vitunes developers and let them know why).
#
# Generated on: ${now}
# Run on OS: `uname -a`

# Install Locations
PREFIX?=${PREFIX}
BINDIR?=${BINDIR}
MANDIR?=${MANDIR}

# TagLib - These MUST be filled in for vitunes to compile!
${TAGLIB_BLOCK}

# gstreamer - Fill these in only if you want gstreamer support
${GSTREAMER_BLOCK}

# configure.sh output ending
EOF

# completed.  provide some instructions.
echo
echo "COMPLETED: config.mk generated."
echo
echo "If there were no errors above, and you are satisfied with the install"
echo "locations listed above, then you should now be able to install vitunes"
echo "with:"
echo "   $ make install"
echo "G'luck!"