#!/usr/bin/awk -f
# $NetBSD: genindex.awk,v 1.9 2018/08/22 20:48:37 maya Exp $
#
# Copyright (c) 2002, 2003 The NetBSD Foundation, Inc.
# All rights reserved.
#
# This code is derived from software contributed to The NetBSD Foundation
# by Dan McMahill.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#


# Global variables
#-----------------
# The following associative arrays are used for storing the dependency
# information and other information for the packages
#
# topdepends[]  : index=pkgdir (math/scilab)
#                 List of explicitly listed depencencies by name.
#                 I.e.  "xless-[0-9]* pvm-3.4.3"
#
# alldepends[]  : index=pkgdir (math/scilab)
#                 Flattened dependency list by name.
#
#


BEGIN {
  debug = 0;
	printf("Reading database file\n");
}

#conflicts /usr/pkgsrc/math/scilab
#depends /usr/pkgsrc/math/scilab xless-[0-9]*:../../x11/xless pvm-3.4.3:../../parallel/pvm3
#

# XXX Need to handle BUILD_DEPENDS/TOOL_DEPENDS split.
/^(build_)?depends / {
#
# Read in the entire depends tree
# These lines look like:
#
#depends /usr/pkgsrc/math/scilab xless-[0-9]*:../../x11/xless pvm-3.4.3:../../parallel/pvm3
#build_depends /usr/pkgsrc/math/scilab libtool-base>=1.4.20010614nb9:../../devel/libtool-base
#
	deptype=$1;
#    pkg=fulldir2pkgdir($2);
	pkg = $2;
	if (pkg in topdepends) {}
	else {topdepends[pkg] = "";}
	if (pkg in topbuilddepends) {}
	else {topbuilddepends[pkg] = "";}

	for (i = 3; i <= NF; i++) {
		split($i, a,":");
		pkgpat = a[1];
		pkgdir = a[2];
		sub(/[\.\/]*/, "", pkgdir);
		if (pkgdir !~ /\//) {
			pkgcat = pkg;
			gsub(/\/.*/, "", pkgcat);
			pkgdir=pkgcat "/" pkgdir;
			if (debug)
				printf("Corrected missing category directory to get \"%s\"\n",
				       pkgdir);
		}
		if (debug){
			printf("package in directory %s %s on:\n",
			       pkg, deptype);
			printf("\tpkgpat = %s\n", pkgpat);
			printf("\tpkgdir = %s\n", pkgdir);
		}


#
# store the package directory in a associative array with the wildcard
# pattern as the index since we will need to be able to look this up later
#
		pat2dir[pkgpat] = pkgdir;

		if (deptype == "depends") {
			topdepends[pkg] = topdepends[pkg] " " pkgpat " " ;
			if (debug) {
			  printf("Appending %s to topdepends[%s] (%s)\n",
				 pkgpat, pkg, topdepends[pkg]);
			}
		}
		else {
			if (debug) {
			  printf("Appending %s to topbuilddepends[%s] (%s)\n",
				 pkgpat, pkg, topbuilddepends[pkg]);
			}
			topbuilddepends[pkg] = topbuilddepends[pkg] " " pkgpat " " ;
		}
	}

	next;
}

/^categories /{
	# note:  we pick out the categories slightly differently than the comment
	# and homepage because the category name will be included in the directory
	# name and hence the index() call points to the wrong location
	categories[$2] = $3;
	for(i = 4; i <= NF; i = i + 1) {
		categories[$2] = categories[$2] " " $i;
	}
	next;
}

/^comment /{
	comment[$2] = substr($0, index($0, $3));
	next;
}

/^descr /{
	descr[$2] = substr($0, index($0, $3));
	next;
}

/^homepage /{
	if( NF>=3 ) {
		homepage[$2] = substr($0, index($0, $3));
	} else {
		homepage[$2] = "";
	}
	next;
}

/^index / {
#
# read lines like:
#index /usr/pkgsrc/math/scilab scilab-2.6nb3
# and store the directory name in a associative array where the index
# is the package name and in a associative array that lets us lookup
# name from directory.  We use fuldir2pkgdir to get "math/scilab"
# and drop the /usr/pkgsrc part.
#
#	pkgname2dir[$3] = fulldir2pkgdir($2);
#	pkgdir2name[fulldir2pkgdir($2)] = $3;
	pkgname2dir[$3] = $2;
	pkgdir2name[$2] = $3;
	next;
}

/^license /{
	license[$2] = substr($0, index($0, $3));
	next;
}

/^maintainer /{
	maintainer[$2] = substr($0, index($0, $3));
	next;
}

/^notfor /{
	notfor[$2] = substr($0, index($0, $3));
	next;
}

/^onlyfor /{
	onlyfor[$2] = substr($0, index($0, $3));
	next;
}

/^prefix /{
	prefix[$2] = substr($0, index($0, $3));
	next;
}

/^wildcard /{
	wildcard[$2] = substr($0, index($0, $3));
	next;
}

#
# Now recurse the tree to give a flattened depends list for each pkg
#

END {
	if( SORT == "" ) { SORT = "sort"; }
        indexf = SORT " > INDEX";
	if ( dependsfile == "" ) dependsfile = "/dev/null";
	if ( builddependsfile == "" ) builddependsfile = "/dev/null";

	printf("Flattening dependencies\n");
	printf("") > dependsfile;
	for (toppkg in topdepends){
		if (debug) printf("calling find_all_depends(%s, run)\n", toppkg);
		find_all_depends(toppkg, "run");
		if (debug) printf("%s depends on: %s, topdepends on %s\n",
				  toppkg, alldepends[toppkg],
				  topdepends[toppkg]);
		printf("%s depends on: %s\n",
		       toppkg, alldepends[toppkg]) >> dependsfile;
		flatdepends[toppkg] = alldepends[toppkg];
	}
	close(dependsfile);


# clear out the flattened depends list and repeat for the build depends
	for( pkg in alldepends) {
		delete alldepends[pkg];
	}

	printf("Flattening build dependencies\n");
	printf("") > builddependsfile;
	for (toppkg in topbuilddepends){
		find_all_depends(toppkg, "build");
		printf("%s build_depends on: %s\n",
		       toppkg, alldepends[toppkg]) >> builddependsfile;
	}
	close(builddependsfile);

	printf("Generating INDEX file\n");

# Output format:
#  package-name|package-path|installation-prefix|comment| \
#  description-file|maintainer|categories|build deps|run deps|for arch| \
#  not for opsys|homepage

	pkgcnt = 0;
	for (toppkg in topdepends){
		pkgcnt++;
		printf("%s|", pkgdir2name[toppkg]) | indexf;
		printf("%s|", toppkg) | indexf;
		printf("%s|", prefix[toppkg]) | indexf;
		printf("%s|", comment[toppkg]) | indexf;
		printf("%s|", descr[toppkg]) | indexf;
		printf("%s|", maintainer[toppkg]) | indexf;
		printf("%s|", categories[toppkg]) | indexf;
		gsub(/^ /, "", alldepends[toppkg]);
		gsub(/ $/, "", alldepends[toppkg]);
		printf("%s|", alldepends[toppkg]) | indexf;
		gsub(/^ /, "", flatdepends[toppkg]);
		gsub(/ $/, "", flatdepends[toppkg]);
		printf("%s|", flatdepends[toppkg]) | indexf;
		printf("%s|", onlyfor[toppkg]) | indexf;
		printf("%s|", notfor[toppkg]) | indexf;
		printf("%s", homepage[toppkg]) | indexf;
		printf("\n") | indexf;
	}
	close(indexf);
	printf("Indexed %d packages\n", pkgcnt);
	exit 0;
}

function find_all_depends(pkg, type, pkgreg, i, deps, depdir, topdep){
# pkg is the package directory, like math/scilab

#    printf("find_all_depends(%s, %s)\n", pkg, type);
# if we find the package already has been fully depended
# then return the depends list
	if (pkg in alldepends){
		if (debug) printf("\t%s is allready depended.  Returning %s\n",
				  pkg, alldepends[pkg]);
		return(alldepends[pkg]);
	}

# if this package has no top dependencies, enter an empty flat dependency
# list for it.
	if( type == "run" ) {
# we only want DEPENDS
		topdep = topdepends[pkg];
	} else {
# we want BUILD_DEPENDS and DEPENDS
		topdep = topdepends[pkg] " " topbuilddepends[pkg];
	}
	if (topdep ~ "^[ \t]*$") {
		alldepends[pkg] = " ";
		if (debug) printf("\t%s has no depends(%s).  Returning %s\n",
				  pkg, topdep, alldepends[pkg]);
		return(alldepends[pkg]);
	}

# recursively gather depends that each of the depends has
	pkgreg = reg2str(pkg);
	split(topdep, deps);
	i = 1;
	alldepends[pkg] = " ";
	while ( i in deps ) {

# figure out the directory name associated with the package hame
# in (wild card/dewey) version form
		depdir = pat2dir[deps[i]];
		if (debug) printf("\tadding dependency #%d on \"%s\" (%s)\n",
				  i, deps[i], depdir);

# do not add ourselves to the list (should not happen, but
# we would like to not get stuck in a loop if one exists)
#		if (" "deps[i]" " !~ pkgreg){

# if we do not already have this dependency (deps[i]) listed, then add
# it.  However, we may have already added it because another package
# we depend on may also have depended on
# deps[i].
		if (alldepends[pkg] !~ reg2str(deps[i])){
		  alldepends[pkg] = alldepends[pkg] " " deps[i] " " find_all_depends(depdir, type);
		}
		else {
		  if (debug) printf("\t%s is already listed in %s\n",
				    deps[i], alldepends[pkg]);
		}

		i = i + 1;
	} # while i

	if (debug) printf("\tcalling uniq() on alldepends[%s] = %s\n",
			  pkg, alldepends[pkg]);
	alldepends[pkg] = uniq(alldepends[pkg]);
	if (debug) printf("\tuniq() output alldepends[%s] = %s\n",
			  pkg, alldepends[pkg]);
	return(alldepends[pkg]);
}

#
# take a string which has special characters like '+' in it and
# escape them.  Also put a space before and after since that's how
# we'll distinguish things like gnome from gnome-libs
#
function reg2str(reg){
	gsub(/\./, "\\.", reg);
	gsub(/\+/, "\\+", reg);
	gsub(/\*/, "\\*", reg);
	gsub(/\?/, "\\?", reg);
	gsub(/\[/, "\\[", reg);
	gsub(/\]/, "\\]", reg);
	reg = " "reg" ";
	return(reg);
}

#
# accepts a full path to a package directory, like "/usr/pkgsrc/math/scilab"
# and returns just the last 2 directories, like "math/scilab"
#
function fulldir2pkgdir(d, i){
	i = match(d, /\/[^\/]+\/[^\/]+$/);
	return substr(d, i + 1);
}

#
# take the depends lists and uniq them.
#
function uniq(list, deps, i, ulist){

# split out the depends
	split(list, deps);

	i = 1;
	ulist = " ";
	while (i in deps){
#	printf("uniq():  Checking \"%s\"\n", ulist);
#	printf("         for \"%s\"\n", reg2str(deps[i]));
		if (ulist !~reg2str(deps[i])){
			ulist = ulist deps[i]" ";
		}
		i++;
	}
	return(ulist);
}