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#!/usr/bin/perl -w
use strict;
my $gnumake;
my $makefile_build;
sub read_deps()
{
my $p;
my $invalid_tolerance = 100;
my $line_count = 0;
my %deps;
# open ($p, "ENABLE_PRINT_DEPS=1 $gnumake -n -f $makefile_build all|") || die "can't launch make: $!";
open ($p, "/tmp/deps") || die "can't read deps: $!";
$|=1;
print STDERR "reading deps ";
while (<$p>) {
my $line = $_;
$line_count++;
print STDERR '.' if ($line_count % 10 == 0);
# print STDERR $line;
chomp ($line);
if ($line =~ m/^LibraryDep:\s+(\S+) links against (.*)$/) {
# if ($line =~ m/^LibraryDep:\s+(\S+)\s+links against/) {
$deps{$1} = ' ' if (!defined $deps{$1});
$deps{$1} = $deps{$1} . ' ' . $2;
} elsif ($line =~ m/^LibraryDep:\s+links against/) {
# these need fixing, we call gb_LinkTarget__use_$...
# and get less than normal data back to gb_LinkTarget_use_libraries
# print STDERR "ignoring unhelpful external dep\n";
} elsif ($invalid_tolerance < 0) {
# print "read all dependencies to: '$line'\n";
last;
} else {
# print "no match '$line'\n";
$invalid_tolerance--;
}
}
close ($p);
print STDERR " done\n";
return \%deps;
}
# graphviz etc. don't like some names
sub clean_name($)
{
my $name = shift;
$name =~ s/[\-\/\.]/_/g;
return $name;
}
# first create nodes for each entry
sub clean_tree($)
{
my $deps = shift;
my %tree;
for my $name (sort keys %{$deps}) {
my $need_str = $deps->{$name};
$need_str =~ s/^\s+//g;
$need_str =~ s/\s+$//g;
my @needs = split /\s+/, $need_str;
$name =~ m/^([^_]+)_(\S+)$/ || die "invalid target name: '$name'";
my $type = $1;
my $target = clean_name ($2);
$type eq 'Executable' || $type eq 'Library' ||
$type eq 'CppunitTest' || die "Unknown type '$type'";
my %result;
$result{type} = $type;
$result{target} = $target;
$result{generation} = 0;
my @clean_needs;
for my $need (@needs) {
push @clean_needs, clean_name($need);
}
$result{deps} = \@clean_needs;
if (defined $tree{$target}) {
print STDERR "warning -duplicate target: '$target'\n";
}
$tree{$target} = \%result;
# print "$target ($type): " . join (',', @clean_needs) . "\n";
}
return \%tree;
}
sub is_existing_child($$$$);
sub is_existing_child($$$$)
{
my ($tree,$search,$name,$generation) = @_;
my $node = $tree->{$name};
# print STDERR "\tis $search a child of $name ?\n";
# cyclic check ...
if ($node->{generation} == $generation) {
# print STDERR "probable cyclic dependency graph hunting for $search in $name\n";
}
$node->{generation} = $generation;
for my $child (@{$node->{deps}}) {
if ($child eq $search) {
return 1;
}
return 1 if (is_existing_child($tree,$search,$child, $generation));
}
return 0;
}
sub dump_graphviz($)
{
my $tree = shift;
my $generation = 1;
print "digraph LibreOffice {\n";
for my $name (sort keys %{$tree}) {
my $result = $tree->{$name};
if ($result->{type} eq 'CppunitTest' ||
($result->{type} eq 'Executable' && $result->{target} ne 'soffice_bin')) {
next; # de-bloat the tree
}
# print STDERR "minimising deps for $result->{target}\n";
my @newdeps;
for my $dep (@{$result->{deps}}) {
my $print = 1;
# is this implied by any other child ?
# print STDERR "checking if '$dep' is redundant\n";
for my $other_dep (@{$result->{deps}}) {
$generation++;
next if ($other_dep eq $dep);
if (is_existing_child($tree,$dep,$other_dep,$generation)) {
$print = 0;
# print STDERR "$dep is implied by $other_dep - ignoring\n";
}
}
print "$name -> $dep;\n" if ($print);
push @newdeps, $dep;
}
# re-write the shrunk set to accelerate things
$result->{deps} = \@newdeps;
}
print "}\n";
}
my $graphviz = 1;
while (my $arg = shift @ARGV) {
if ($arg eq '--graph' || $arg eq '-g') {
$graphviz = 1;
} elsif (!defined $gnumake) {
$gnumake = $arg;
} elsif (!defined $makefile_build) {
$makefile_build = $arg;
} else {
die "un-needed argument '$arg'";
}
}
$gnumake = 'make' if (!defined $gnumake);
$makefile_build = 'Makefile.gbuild' if (!defined $makefile_build);
my $deps = read_deps();
my $tree = clean_tree($deps);
dump_graphviz($tree);
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