#!/bin/sh
# --- T2-COPYRIGHT-NOTE-BEGIN ---
# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
# 
# T2 SDE: misc/tail/formats/tail.in
# Copyright (C) 2004 - 2005 The T2 SDE 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.
# --- T2-COPYRIGHT-NOTE-END ---

# T2 Automated Init Language - Tail
# http://wiki.t2-project.org/index.cgi?TailFormat
# Alejandro Mery <amery@geeks.cl>

tail_read() {
	local verbose=1 file= output= query=
	local query= count=2

	if [ "$1" == "-q" ]; then
		verbose=
		shift
	fi

	file="$1"; shift
	while [ $# -gt 1 ]; do
		query="${query}$1	"
		shift;
		(( count++ ))
	done
	query="${query}$1\\(	\\|\$\\)"

	output="$( grep -e "^$query" $file | cut -f$count- )"
	[ "$verbose" ] && echo "$output"
	
	grep -q -e "^$query" $file
	}

tail_install() {
	local style=$1 tailfile="$2"
	local x= y= z=
	shift 2

	case "$style" in
		runit)
			local servicedir=$( echo `eval echo $1` )
			local runprefix=
			
			mkdir -vp "$servicedir"
			rm -f /tmp/tail.$$

			# run /tailrun/ options
			#
			eval "`tail_read $tailfile tailrun $style`"

			# ./env/
			#
			if tail_read -q $tailfile env; then
				mkdir -p "$servicedir/env"
				runprefix="$runprefix${runprefix:+ }envdir ./env"
				tail_read $tailfile env | while read x y; do
					echo "TAIL: ./env/$x = $y"
					echo "$y" | sde_substitute > $servicedir/env/$x
				done
			fi

			# ./run
			#
			cat <<-EOT > /tmp/tail.$$
				#!/bin/sh
				exec 2>&1
				EOT

			if tail_read -q $tailfile input; then
				echo "exec < $( tail_read $tailfile input )" >> /tmp/tail.$$
			fi

			if tail_read -q $tailfile user; then
				runprefix="$runprefix${runprefix:+ }envuidgid $( tail_read $tailfile user )"
			fi

			echo "exec $runprefix${runprefix:+ }$( tail_read $tailfile run )" >> /tmp/tail.$$

			sde_substitute /tmp/tail.$$ > $servicedir/run
			chmod +x $servicedir/run

			# ./conffile
			#
			for x in `tail_read $tailfile conf | cut -f1 | sort -u`; do
				y="$x"
				echo "TAIL: $x ..."
				if [ "${y%/*}" != "$y" ]; then
					if [ "${y:0:1}" != "/" ]; then
						y="$servicedir/$y"
					fi
					mkdir -vp ${y%/*}
				fi
				rm -vf $y
				tail_read $tailfile conf $x | sde_substitute > $y
			done

			# ./log/
			#
			if tail_read -q $tailfile log; then
				mkdir -vp "$servicedir/log/main"
					
				if [ -z "$logdir" ]; then
					if [ "${localstatedir%$pkg}" != "$localstatedir" ]; then
						logdir=$localstatedir/log
					else
						logdir=$localstatedir/log/$pkg
					fi
				fi

				z= 
				for x in `tail_read $tailfile log | cut -f1 | sort -u`; do
					echo "TAIL: ./log/$x"
					mkdir -vp $root/$logdir/$x
					chown 9:9 $root/$logdir/$x

					ln -vnfs $logdir/$x $servicedir/log/main/

					z="$z main/$x"

					y="`tail_read $tailfile log $x`"
					[ "$y" ] && echo "$y" > $root/$logdir/$x/config || true
				done
				cat <<-EOT > "$servicedir/log/run"
				#!/bin/sh
				exec 2>&1

				exec setuidgid log svlogd -t $z
				EOT
				chmod +x "$servicedir/log/run"
			fi
				
			;;
		*)
			abort "tail_install: unknown style '$style' for $tailfile."
			;;
	esac
}