configure

#!/bin/bash
#
# Configure script
#

vars=( prefix bindir mandir )
binaries=()

# Default value for prefix dir
prefix=/usr

usage() {
    cat >&2 <<EOH

Usage: 
    $0 [--prefix=<prefix>] [--bindir=<bindir>] [--mandir=<mandir>] executable1 [[executable2] ... [executableN]]

Arguments:
    executable1...executableN  Source path(s) of the executable files to be distributed

Options:
    --help, -h Display this help and exit
    --prefix   The prefix dir (defaults to $prefix)
    --bindir   The binary install dir (defaults to \$PREFIX/bin)
    --mandir   The manual install dir (defaults to \$PREFIX/share/man)

EOH
}

while [ $# -gt 0 ]
do
    case $1 in
        --help|-h|--usage)
            usage
            exit 0
            ;;
        --prefix)
            prefix=$2
            shift 2
            ;;
        --bindir)
            bindir=$2;
            shift 2
            ;;
        --mandir)
            mandir=$2;
            shift 2
            ;;
        --*)
            printf '\nUnrecognized option "%s"\n' $1
            shift
            ;;
        *)
            binaries+=( $1 )
            shift
            ;;
    esac
done

if [ "${#binaries[@]}" -eq "0" ]
then
    usage
    exit 1
fi

[ -z "$bindir" ] && bindir=${prefix}/bin
[ -z "$mandir" ] && mandir=${prefix}/share/man

printf "\n\033[01;32mConfigured variables:\033[00m\n---------------------\n"
for v in ${vars[@]}
do
    printf "%s: %s\n" $v ${!v}
done

# Build Makefile upon variables using heredoc
cat > Makefile <<EOT
# vim: set noexpandtab
all:
	./generate-doc

install:
	./install-doc
EOT

for bin in "${binaries[@]}"
do
cat >> Makefile <<EOT
	cp -v ${bin} ${bindir}
EOT
done

printf "\n\033[01;32mGenerated\033[00m Makefile\n"