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# $NetBSD: tflat,v 1.14 2005/03/24 16:47:35 tv Exp $
#
# Copyright (c) 2001 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.
# 3. All advertising materials mentioning features or use of this software
# must display the following acknowledgement:
# This product includes software developed by the NetBSD
# Foundation, Inc. and its contributors.
# 4. Neither the name of The NetBSD Foundation nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# 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.
#
BEGIN {
if (ARGC != 3){
printf("tflat: wrong number of arguments\n");
usage();
exit(1);
}
if ( ARGV[1] == "up" ) {
up=1;
}
else{
if ( ARGV[1] == "down" ) { up=0; }
else{
printf("tflat: unknown option \"%s\"\n",ARGV[1]);
usage();
exit(1);
}
}
InFile = ARGV[2];
#
# Read in the entire depends tree
#
if (up){
while(getline < InFile > 0){
if ($1 in topdepends)
topdepends[$1] = topdepends[$1] " " $2 " " ;
else{
topdepends[$1] = " " $2 " ";
}
# Note that it is possible for a package "foo/bar" to
# never appear in $1. In fact if foo/bar is not
# depended upon by anything and it has depends then it
# will not show up in $1 however, we need to make sure
# we get a topdepends[foo/bar] entry so add it here if
# its not already there.
if (!($2 in topdepends))
topdepends[$2] = "";
}
depstr = " is depended on by: ";
}
else{
while(getline < InFile > 0){
if ($2 in topdepends)
topdepends[$2] = topdepends[$2] " " $1 " " ;
else
topdepends[$2] = " " $1 " " ;
}
depstr = " depends on: ";
}
close(InFile);
#
# Now recurse the tree to give a flattened depends list for each pkg
#
for (toppkg in topdepends){
find_all_depends(toppkg);
}
for (x in alldepends){
print x depstr alldepends[x] | "${SORT-sort}";
}
printf("\n");
exit 0
}
function find_all_depends(pkg,pkgreg,i,deps){
# If we find the package already has been fully depended
# then return the depends list.
if (pkg in alldepends){
return(alldepends[pkg]);
}
# If we find the package listed in its own depends list, then
# return an empty list if we're going down the depends tree.
# When a package lists itself in the depends tree file, it simply
# is a place holder and means the package has no depends. However
# other packages may still depend upon it, so we need to keep looking.
if ( (!up) && (topdepends[pkg]~reg2str(pkg)) ){
alldepends[pkg] = " ";
return(alldepends[pkg]);
}
# Otherwise recursively gather depends that each of the depends
# has.
pkgreg=reg2str(pkg);
split(topdepends[pkg],deps);
i=1;
alldepends[pkg] = " ";
while ( i in deps ){
# Don't add ourselves to the list (a possibility when going up
# the tree).
if (" "deps[i]" "!~pkgreg){
alldepends[pkg] = alldepends[pkg] " " deps[i] " " find_all_depends(deps[i]);
}
i=i+1;
}
alldepends[pkg] = uniq(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);
reg = " "reg" ";
return(reg);
}
#
# 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){
if (ulist !~reg2str(deps[i])){
ulist = ulist deps[i]" ";
}
i++;
}
return(ulist);
}
#
# show usage
#
function usage(){
printf("tflat -- flatten a depends tree. tflat is used to show all\n");
printf(" packages which depend upon a given package or alternatively\n");
printf(" all packages which are depend upon by a given package.\n");
printf("\n");
printf("Usage:\ttflat up|down depfile\n");
printf("\n");
printf("Options:\tdown\tgo down the depends tree (ie \"foo depends on:\")\n");
printf(" \tup\tgo up the depends tree (ie \"foo is depended on by:\")\n");
printf("\n");
printf("Input file format is in the form\n");
printf("foo bar\n");
printf("foo baz\n");
printf("libbar bar\n");
printf("\n");
printf("meaning \"foo is depended upon by bar,\n");
printf(" foo is depended upon by baz,\n");
printf(" libbar is depended upon by bar\"\n");
printf("\n");
printf("The typical use is:\n");
printf("cd /usr/pkgsrc\n");
printf("./mk/bulk/printdepends > .depends\n");
printf("./mk/bulk/tflat up .depends > .supports\n");
printf("./mk/bulk/tflat down .depends > .requires\n");
printf("\n");
}
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