rpm-build/scripts/find-package.in

#!/bin/sh -efu
#
# Copyright (C) 2002-2003  Dmitry V. Levin <ldv@altlinux.org>
# Copyright (C) 2007       Alexey Tourbin <at@altlinux.org>
#
# 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; either version 2 of the License, or
# (at your option) any later version.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#

. @RPMCONFIGDIR@/functions

RPM_FINDPACKAGE_PATH="${RPM_FINDPACKAGE_PATH-}:/bin:/sbin:/usr/bin:/usr/sbin:/usr/X11R6/bin"
RPM_FINDPACKAGE_PATH="$(IFS="$IFS:"; set -f; echo '' $RPM_FINDPACKAGE_PATH |sed -e 's/  */:/g; s/^://')"
Debug "RPM_FINDPACKAGE_PATH=$RPM_FINDPACKAGE_PATH"

# Below we use 'local Verbose=Info' to increase per-case verbosity.
Verbose=Verbose

FindByPath()
{
	# Dependence name starts with `/'.
	local f="$1" rep="$2" package; shift 2 || return

	# Does it start with buildroot?
	if [ -n "${RPM_BUILD_ROOT-}" ] && [ -z "${rep##$RPM_BUILD_ROOT*}" ]; then
		Info "$f: invalid dependence: $rep"
		return 1
	fi

	# Does it belong to buildroot?
	if [ -n "${RPM_BUILD_ROOT-}" ] && [ -e "$RPM_BUILD_ROOT$rep" ]; then
		$Verbose "$f: $rep -> \$RPM_BUILD_ROOT$rep (skip)"
		return
	fi

	# Is it an alternative?
	if readlink "$rep" |grep -qs '^/etc/alternatives/'; then
		$Verbose "$f: $rep -> $rep (alternative)"
		printf %s\\n "$rep"
		return
	fi

	# Always try package binary index.
	local idx_bin="${RPM_PKG_CONTENTS_INDEX_BIN-}" try_idx_bin=1
	[ -n "$idx_bin" ] && [ -s "$idx_bin" ] && [ -r "$idx_bin" ] || try_idx_bin=
	if [ -n "$try_idx_bin" ]; then
		package="$(awk -v "f=$rep" '($1 == f) {print $2}' "$idx_bin" |sort -u)"
		local n="$(IFS=$'\n'; set -- $package; echo $#)"
		if [ "$n" = 1 ]; then
			$Verbose "$f: $rep -> $package (via contents_index_bin)"
			printf %s\\n "$package"
			return
		elif [ "$n" -gt 1 ]; then
			Info "$f: $rep indexed by:$(echo '' $package)"
			Info "$f: $rep -> $rep (raw, ambiguous, via contents_index_bin)"
			printf %s\\n "$rep"
			return
		fi
	fi

	# Maybe try pkg complete index.
	local idx_all="${RPM_PKG_CONTENTS_INDEX_ALL-}" try_idx_all=1
	[ -n "$idx_all" ] && [ -s "$idx_all" ] && [ -r "$idx_all" ] || try_idx_all=
	case "$try_idx_bin$rep" in
		1/bin/* | 1/sbin/* | 1/usr/bin/* | 1/usr/sbin/* )
			# Binary index already checked for standard *bin/* entries.
			# No need to check complete index.
			try_idx_all=
	esac
	if [ -n "$try_idx_all" ]; then
		# Checking complete index is expensive.
		local Verbose=Info
		Info "$f: checking contents_index_all for $rep"
		# Complete package index is possibly gzipped.
		package="$(gzip -cdfq "$idx_all" |awk -v "f=$rep" '($1 == f) {print $2}' |sort -u)"
		local n="$(IFS=$'\n'; set -- $package; echo $#)"
		if [ "$n" = 1 ]; then
			Info "$f: $rep -> $package (via contents_index_all)"
			printf %s\\n "$package"
			return
		elif [ "$n" -gt 1 ]; then
			Info "$f: $rep indexed by:$(echo '' $package)"
			Info "$f: $rep -> $rep (raw, ambiguous, via contents_index_all)"
			printf %s\\n "$rep"
			return
		fi
	fi

	# Check package database.
	if package="$(rpmquery --whatprovides --queryformat='%{NAME}\n' -- "$rep")"; then
		package="$(printf %s "$package" |LC_COLLATE=C sort -u)"
		local n="$(IFS=$'\n'; set -- $package; echo $#)"
		if [ "$n" = 1 ]; then
			$Verbose "$f: $rep -> $package (via rpmdb)"
			printf %s\\n "$package"
			return
		elif [ "$n" -gt 1 ]; then
			Info "$f: $rep provided by:$(echo '' $package)"
			Info "$f: $rep -> $rep (raw, ambiguous, via rpmdb)"
			printf %s\\n "$rep"
			return
		fi
	fi

	# Not found; output raw dependence.
	Info "$f: $rep -> $rep (raw, not found)"
	printf %s\\n "$rep"
}

FindByName()
{
	local f="$1" r="$2" rep package; shift 2 || return

	# Check buildroot first.
	if [ -n "${RPM_BUILD_ROOT-}" ]; then
		local RPATH
		RPATH="$(printf %s "$RPM_FINDPACKAGE_PATH" |sed -e "s|[^:]\+|$RPM_BUILD_ROOT&|g")"
		if rep="$(PATH="$RPATH" /usr/bin/which -- "$r" 2>/dev/null)"; then
			$Verbose "$f: $r -> \$RPM_BUILD_ROOT${rep#$RPM_BUILD_ROOT} (skip)"
			return
		fi
	fi

	# Check for pkg contents binary index.
	rep= package=
	if [ -n "${RPM_PKG_CONTENTS_INDEX_BIN-}" ] && [ -s "$RPM_PKG_CONTENTS_INDEX_BIN" ] && [ -r "$RPM_PKG_CONTENTS_INDEX_BIN" ]; then
		local out="$(awk -v r="$r" -v RPM_FINDPACKAGE_PATH="$RPM_FINDPACKAGE_PATH" '
			BEGIN {
				n = split(RPM_FINDPACKAGE_PATH, ary, ":")
				for (i = 1; i <= n; i++) {
					dir = ary[i]
					sub("/+$", "", dir)
					file = dir "/" r
					if (dir && !(file in FILES))
						FILES[file] = i
				}
			}
			NF==2 && ($1 in FILES) {
				print FILES[$1] "\t" $1 "\t" $2
			}
			' "$RPM_PKG_CONTENTS_INDEX_BIN" |
				sort -n |sort -u -k3 |sort -n |cut -f2-)"
		local n="$(IFS=$'\n'; set -- $out; echo $#)"
		if [ "$n" = 1 ]; then
			rep="$(IFS=$'\t\n'; set -- $out; printf %s "$1")"
			package="$(IFS=$'\t\n'; set -- $out; printf %s "$2")"
			$Verbose "$r -> $rep -> $package (via contents_index_bin)"
			printf %s\\n "$package"
			return
		elif [ "$n" -gt 1 ]; then
			local Verbose=Info
			Info "$f: $r indexed by:$(printf %s "$out" |sed -e 's/\t/ -> /; s/$/,/; $s/,$//' |xargs echo '')"
			rep="$(IFS=$'\t\n'; set -- $out; printf %s "$1")"
			package="$(IFS=$'\t\n'; set -- $out; printf %s "$2")"
			local rep2="$(IFS=$'\t\n'; set -- $out; printf %s "$3")"
			if [ "$rep" = "$rep2" ]; then
				Info "$f: $r -> $rep -> $rep (raw, ambiguous, via contents_index_bin)"
				printf %s\\n "$rep"
				return
			fi
		fi
	fi

	# Lookup in the host system.
	local irep="$rep"
	if rep="$(PATH="$RPM_FINDPACKAGE_PATH" /usr/bin/which --all -- "$r" 2>/dev/null)"; then
		local n="$(IFS=$'\n'; set -- $rep; echo $#)"
		if [ "$n" -gt 1 ]; then
			n="$(IFS=$'\n'; for f in $rep; do readlink -vm "$f"; done |sort -u |wc -l)"
			if [ "$n" -gt 1 ]; then
				local Verbose=Info
				Info "$f: which $r:$(echo '' $rep)"
			fi
			rep="$(IFS=$'\n'; set -- $rep; printf %s "$1")"
		fi
		if [ -n "$rep" ]; then
			$Verbose "$f: $r -> $rep -> ... (via which)"
			FindByPath "$f" "$rep"
			return
		fi
	fi

	# Reconsult pkg contents binary index.
	if [ -n "$irep" ] && [ -n "$package" ]; then
		rep="$irep"
		$Verbose "$f: $r -> $rep -> $package (via contents_index_bin)"
		printf %s\\n "$package"
		return
	fi

	# Not found.
	Info "$f: $r not found (skip)"
}

FindPackage()
{
	local f="$1" r; shift || return
	for r; do
		local Verbose=Verbose
		case "$r" in
			/*)
				FindByPath "$f" "$r" ;;
			*/*)
				Info "$f: invalid pathname $r" ;;
			-*)
				Info "$f: invalid command $r" ;;
			'')
				;;
			*)
				FindByName "$f" "$r" ;;
		esac
	done
}