#!/bin/sh
# $FreeBSD$
# This file for common functions used for port scripts.
#
# MAINTAINER: portmgr@FreeBSD.org

# Expand TMPPLIST to absolute paths, splitting files and dirs into separate
# descriptors.
# Input:
#  fd:0 - plist to parse
# Required params:
#  PREFIX
#  parse_comments: Whether to parse and include commented files.
# Output:
#  fd:1 - list of files
#  fd:2 - stderr
#  fd:3 - list of directories
parse_plist() {
	local cwd cwd_save commented_cwd comment line newcwd parse_comments \
	    PREFIX

	PREFIX="${1}"
	parse_comments="${2:-1}"

	cwd=${PREFIX}
	cwd_save=
	commented_cwd=
	while read line; do
		# Handle deactivated OPTIONS. Treat "@comment file" as being in
		# the plist so it does not show up as an orphan. PLIST_SUB uses
		# a @comment to deactive files. XXX: It would be better to
		# make all ports use @ignore instead of @comment.
		if [ ${parse_comments} -eq 1 -a -z "${line%%@comment *}" ]; then
			line="${line##*@comment }"
			# Remove @comment so it can be parsed as a file,
			# but later prepend it again to create a list of
			# all files commented and uncommented.
			comment="@comment "
			# Only consider comment @cwd for commented lines
			if [ -n "${commented_cwd}" ]; then
				[ -z "${cwd_save}" ] && cwd_save=${cwd}
				cwd=${commented_cwd}
			fi
		else
			comment=
			# On first uncommented line, forget about commented
			# @cwd
			if [ -n "${cwd_save}" ]; then
				cwd=${cwd_save}
				cwd_save=
				commented_cwd=
			fi
		fi

		# Strip (owner,group,perm) from keywords
		line="$(printf %s "$line" \
		    | sed -Ee 's/^@\([^)]*\)[[:space:]]+//' \
			-e 's/^(@[[:alpha:]]+)\([^)]*\)[[:space:]]+/\1 /')"
		case $line in
		@dir*|'@unexec rmdir'*|'@unexec /bin/rmdir'*)
			line="$(printf %s "$line" \
			    | sed -Ee 's/\|\|.*//;s|[[:space:]]+[0-9]*[[:space:]]*>[&]?[[:space:]]*[^[:space:]]+||g' \
			        -e "/^@unexec[[:space:]]+(\/bin\/)?rmdir( -p)?/s|([^%])%D([^%])|\1${cwd}\2|g" \
			        -e '/^@unexec[[:space:]]+(\/bin\/)?rmdir( -p)?/s|"(.*)"[[:space:]]*|\1|g' \
			        -e 's/@unexec[[:space:]]+(\/bin\/)?rmdir( -p)?[[:space:]]+//' \
				-e 's/@dir(rm|rmtry)?[[:space:]]+//' \
				-e 's/[[:space:]]+$//')"
			case "$line" in
			/*) echo >&3 "${comment}${line%/}" ;;
			*)  echo >&3 "${comment}${cwd}/${line%/}" ;;
			esac
		;;
		# Handle [file] Keywords
		@info\ *|@shell\ *)
			set -- $line
			shift
			case "$@" in
			/*) echo "${comment}$@" ;;
			*) echo "${comment}${cwd}/$@" ;;
			esac
		;;
		@sample\ *)
			set -- $line
			shift
			# Ignore the actual file if it is in stagedir
			case "$@" in
			/*)
			echo "@comment ${@%.sample}"
			echo "${comment}$@"
			;;
			*)
			echo "@comment ${cwd}/${@%.sample}"
			echo "${comment}${cwd}/$@"
			;;
			esac
		;;
		# Handle [dir] Keywords
		@fc\ *|@fcfontsdir\ *|@fontsdir\ *)
			set -- $line
			shift
			case "$@" in
			/*)
			echo >&3 "${comment}$@"
			;;
			*)
			echo >&3 "${comment}${cwd}/$@"
			;;
			esac
		;;

		# order matters here - we must check @cwd first because
		# otherwise the @cwd* would also match it first, shadowing the
		# @cwd) line.
		@cwd|@cd)
			# Don't actually reset cwd for commented @cwd
			if [ -n "${comment}" ]; then
				commented_cwd=${PREFIX}
			else
				cwd=${PREFIX}
			fi
			;;
		@cwd*|@cd*)
			set -- $line
			newcwd=$2
			# Don't set cwd=/ as it causes // in plist and
			# won't match later.
			[ "${newcwd}" = "/" ] && newcwd=
			# Don't actually reset cwd for commented @cwd
			if [ -n "${comment}" ]; then
				commented_cwd=${newcwd}
			else
				cwd=${newcwd}
			fi
			unset newcwd
			;;
		@*) ;;
		/*) echo "${comment}${line}" ;;
		*)  echo "${comment}${cwd}/${line}" ;;
		esac
	done
}

validate_env() {
	local envfault
	for i ; do
		if ! (eval ": \${${i}?}" ) >/dev/null; then
			envfault="${envfault}${envfault:+" "}${i}"
		fi
	done
	if [ -n "${envfault}" ]; then
		echo "Environment variable ${envfault} undefined. Aborting." \
		| fmt >&2
		exit 1
	fi
}