install

#!/bin/sh

# Copyright (C) 2017, 2018, 2019 Karl Landstrom <karl@miasap.se>
#
# This file is part of obnc-libext.
#
# obnc-libext 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.
#
# obnc-libext 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 obnc-libext.  If not, see <http://www.gnu.org/licenses/>.

set -o errexit -o nounset

readonly selfDirPath="$(cd "$(dirname "$0")"; pwd -P)"
readonly packageName="$(basename "$selfDirPath")"
readonly packageNameSansVersion="${packageName%%-[0-9]*}"
readonly libName="${packageNameSansVersion#obnc-lib}"

readonly modules="$(ls "$selfDirPath/$libName"/*.obn | grep -v 'Test\.obn$' | while read file; do basename "${file%.obn}"; done)"

prefix="/usr/local"
libdir="lib"
destdir=

destIncludeDir=
destLibDir=
destObncdocDir=

includeLibCSrc=false

EchoAndRun()
{
	echo "$@"
	eval "$@"
}


UpdateObncdocIndex()
{
	EchoAndRun cd "$destObncdocDir/.."
	if obncdoc-index >/dev/null 2>&1; then
		EchoAndRun obncdoc-index \> index.html
	fi
	cd - >/dev/null
}


Install()
{
	local srcDir="$selfDirPath/$libName"

	#install library
	EchoAndRun mkdir -p "$destIncludeDir"
	EchoAndRun mkdir -p "$destLibDir"
	local module=
	for module in $modules; do
		EchoAndRun cp "$srcDir/.obnc/$module.h" "$destIncludeDir"
		EchoAndRun cp "$srcDir/.obnc/$module.o" "$destLibDir"
		EchoAndRun cp "$srcDir/.obnc/$module.sym" "$destLibDir"
		if [ -e "$srcDir/.obnc/$module.imp" ]; then
			EchoAndRun cp "$srcDir/.obnc/$module.imp" "$destLibDir"
		fi
		if [ -e "$srcDir/$module.env" ]; then
			EchoAndRun cp "$srcDir/$module.env" "$destLibDir"
		fi
		if "$includeLibCSrc"; then
			local source="$srcDir/$module.c"
			if [ ! -e "$source" ]; then
				source="$srcDir/.obnc/$module.c"
			fi
			EchoAndRun sed -e "'s|#include \"\(\.obnc/\)\?$module\.h\"|#include <obnc/ext/$module.h>|'" "'$source'" \> "'$destLibDir/$module.c'"
		fi
	done

	#install documentation
	EchoAndRun mkdir -p "$destObncdocDir"
	EchoAndRun cp "$srcDir/obncdoc/$libName"* "$destObncdocDir"
	for file in "$srcDir/obncdoc/"*; do
		if [ "$file" = "${file%Test.*}" ]; then
			EchoAndRun cp "$file" "$destObncdocDir"
		fi
	done
	UpdateObncdocIndex
}


Uninstall()
{
	#delete library files
	local module=
	for module in $modules; do
		EchoAndRun rm -f "$destIncludeDir/$module.h"
		EchoAndRun rm -f "$destLibDir/$module.o"
		EchoAndRun rm -f "$destLibDir/$module.sym"
		EchoAndRun rm -f "$destLibDir/$module.imp"
		EchoAndRun rm -f "$destLibDir/$module.env"
		EchoAndRun rm -f "$destLibDir/$module.c"
	done

	#delete documentation
	EchoAndRun rm -f "$destObncdocDir"/*
	UpdateObncdocIndex
}


Help()
{
	echo "usage: "
	printf "\tinstall [u] [--prefix=PREFIX] [--libdir=LIBDIR] [--destdir=DESTDIR] [--include-lib-c-src]\n"
	printf "\tinstall -h\n"
	echo
	printf "\tu\t\t\tuninstall\n"
	printf "\t--prefix\t\ttoplevel installation dir instead of /usr/local\n"
	printf "\t--libdir\t\tlibrary installation directory instead of lib\n"
	printf "\t--destdir\t\tspecify directory for staged installation\n"
	printf "\t--include-lib-c-src\tmake cross compilation possible\n"
	printf "\t-h\t\t\tdisplay help and exit\n"
}

uninstall=false
for arg in "$@"; do
	case "$arg" in
		u)
			uninstall=true;;
		--prefix=*)
			prefix="${arg#--prefix=}"
			if [ "${prefix#/}" = "$prefix" ]; then
				echo "prefix must be an absolute path: $prefix" >&2
				exit 1
			fi;;
		--libdir=*)
			libdir="${arg#--libdir=}"
			if [ "${libdir#*/}" != "$libdir" ]; then
				echo "libdir must be a prefix relative path, not an absolute path: $prefix" >&2
				exit 1
			fi;;
		--destdir=*)
			destdir="${arg#--destdir=}";;
		--include-lib-c-src)
			includeLibCSrc=true;;
		-h)
			Help
			exit;;
		*) { echo "invalid command"; Help; } >&2
			exit 1
	esac
done

destIncludeDir="$destdir$prefix/include/obnc/$libName"
destLibDir="$destdir$prefix/$libdir/obnc/$libName"
destObncdocDir="$destdir$prefix/share/doc/obnc/obncdoc/$libName"

if "$uninstall"; then
	Uninstall
else
	Install
fi