#!/bin/bash
# --- SDE-COPYRIGHT-NOTE-BEGIN ---
# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
#
# Filename: lib/sde-config/pkgseldir_compile.sh
# Copyright (C) 2008 - 2010 The OpenSDE Project
#
# More information can be found in the files COPYING and README.
#
# This program 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; version 2 of the License. A copy of the
# GNU General Public License can be found in the file COPYING.
# --- SDE-COPYRIGHT-NOTE-END ---

PKGSEL_LIST_VAR="$1"
VAR_PREFIX="$2"
OUT_PREFIX="$3"

shift 3

OUT_CONFIG="${OUT_PREFIX}config.in"
OUT_PKGSEL="${OUT_PREFIX}pkgsel.in"
OUT_PKGSELAWK="${OUT_PREFIX}pkgsel.awk"

trap ' ' INT

module_get_var()
{
	echo "${VAR_PREFIX}${1}" | tr ' a-z-' '_A-Z_'
}

module_get_description()
{
	sed -n -e 's/^#[ \t]*Description:[ \t]*\(.*\)/\1/p' "$1"
}

module_get_default()
{
	sed -n -e 's/^# Default: \(.*\)/\1/p' "$1"
}

module_render()
{
	local pkgseldir="$1" module_dir="$2" module_filename="$3" module_name="$4" module_type="$5"
	local file= var= desc= default=

	# recompose the full path to the module file
	file="$pkgseldir${module_dir:+/$module_dir}/$module_filename"
	var="$( module_get_var "$module_name" )"

	# print headers
	cat <<-EOT | tee -a "$OUT_CONFIG.$$" >> "$OUT_PKGSEL.$$"
	# BEGIN:$var ($module_filename)
	#
	EOT

	case "$module_type" in
	auto)
		cat <<-EOT >> "$OUT_PKGSEL.$$"
		$PKGSEL_LIST_VAR="\$$PKGSEL_LIST_VAR $file"
		EOT
		;;
	boolean)
		desc="$( module_get_description "$file" )"
		default="$( module_get_default "$file" )"

		cat <<-EOT >> "$OUT_CONFIG.$$"
		bool '${desc:-${module_name//_/ }}' $var ${default:-0}
		EOT

		cat <<-EOT >> "$OUT_PKGSEL.$$"
		if [ "\$$var" = 1 ]; then
		    $PKGSEL_LIST_VAR="\$$PKGSEL_LIST_VAR $file"
		fi
		EOT
		;;
	esac

	# print footers
	cat <<-EOT | tee -a "$OUT_CONFIG.$$" >> "$OUT_PKGSEL.$$"
	# END:$var

	EOT
}

cat <<-EOT | tee "$OUT_CONFIG.$$" > "$OUT_PKGSEL.$$"
# Generated by $0
# ($( date ))
# using: $@

EOT

for pkgseldir; do
	if [ ! -d "$pkgseldir" ]; then
		echo "$pkgseldir: Invalid pkgseldir." >&2
		continue
	else
		pkgseldir=$( cd "$pkgseldir"; pwd -P )
	fi

	bin/find "$pkgseldir" -name '*.all' -o -name '*.ask' | sort | while read module; do
		# simple parsing
		#
		module_dir="${module%/*}"
		module_filename="${module##*/}"
		module_file_ext="${module##*.}"

		case "$module_file_ext" in
		all)	module_type=auto
			;;
		ask)	module_type=boolean
			;;
		*)	# not a module
			continue
			;;
		esac

		# make $module_dir $pkgseldir relative
		if [ "$module_dir" = "$pkgseldir" ]; then
			module_dir=
		else
			module_dir="${module_dir#$pkgseldir/}"
		fi

		module_name="$( echo "${module_filename%.*}" | sed -e 's/^[0-9][0-9]-//' )"

		module_render "$pkgseldir" "$module_dir" "$module_filename" "$module_name" "$module_type"
	done
done

cat <<EOT >> "$OUT_PKGSEL.$$"

# Update .awk file only if needed
#
if [ ! -s "$OUT_PKGSELAWK" -o "\$( cat "$OUT_PKGSELAWK.cache" 2> /dev/null)" != "\$$PKGSEL_LIST_VAR" ]; then
	echo "\$$PKGSEL_LIST_VAR" > $OUT_PKGSELAWK.cache

	cat <<-EOF > "$OUT_PKGSELAWK.\$\$"
	# Generated by \$0
	# \$( date )
	# using: \$$PKGSEL_LIST_VAR

	EOF

	lib/sde-config/pkgsel2awk.sh \$$PKGSEL_LIST_VAR >> "$OUT_PKGSELAWK.\$\$"
	mv "$OUT_PKGSELAWK.\$\$" "$OUT_PKGSELAWK"
fi
EOT

for x in $OUT_CONFIG $OUT_PKGSEL; do
	mv "$x.$$" "$x"
done