From 630d23283aea2304396069c6a9c305913ccb02aa Mon Sep 17 00:00:00 2001
From: William Hubbs <w.d.hubbs@gmail.com>
Date: Wed, 2 Jan 2013 12:40:03 -0600
Subject: [PATCH] Add tools directory

This directory will contain tools which are not necessary for OpenRC to
run, but which some users have found useful.

The first of these is deptree2dot, which converts /run/openrc/deptree to
a .dot file for use with graphviz. This can assist in finding circular
dependencies.
---
 README                |  1 +
 src/Makefile          |  4 ++++
 src/tools/Makefile    |  5 +++++
 src/tools/deptree2dot | 44 +++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 54 insertions(+)
 create mode 100644 src/tools/Makefile
 create mode 100644 src/tools/deptree2dot

diff --git a/README b/README
index 2740f542..e787ea76 100644
--- a/README
+++ b/README
@@ -18,6 +18,7 @@ MKSELINUX=yes
 MKSTATICLIBS=no
 MKTERMCAP=ncurses
 MKTERMCAP=termcap
+MKTOOLS=yes
 PKG_PREFIX=/usr/pkg
 LOCAL_PREFIX=/usr/local
 PREFIX=/usr/local
diff --git a/src/Makefile b/src/Makefile
index e3750347..ffbf8d6e 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -3,5 +3,9 @@
 
 SUBDIR=		test libeinfo librc rc
 
+ifeq (${MKTOOLS},yes)
+SUBDIR+= tools
+endif
+
 MK=		../mk
 include		${MK}/subdir.mk
diff --git a/src/tools/Makefile b/src/tools/Makefile
new file mode 100644
index 00000000..92ff5063
--- /dev/null
+++ b/src/tools/Makefile
@@ -0,0 +1,5 @@
+DIR=	${UPREFIX}/bin
+BIN=	deptree2dot
+
+MK=	../../mk
+include ${MK}/scripts.mk
diff --git a/src/tools/deptree2dot b/src/tools/deptree2dot
new file mode 100644
index 00000000..07ba17af
--- /dev/null
+++ b/src/tools/deptree2dot
@@ -0,0 +1,44 @@
+#!/usr/bin/perl -w
+# -*- cperl -*-
+# Copyright © 2012 Diego Elio Pettenò <flameeyes@flameeyes.eu>
+# Released under the 2-clause BSD license.
+#
+#Example usage:
+#deptree2dot > deptree.dot
+#deptree2dot | dot -Tpng -o deptree.png
+
+my $deptree = defined($ARGV[0]) ? $ARGV[0] : "/run/openrc/deptree";
+
+open DEPTREE, $deptree or exit 1;
+
+print "digraph deptree {\n";
+
+my @deptree;
+
+while(my $line = readline(DEPTREE)) {
+  $line =~ /^depinfo_([0-9]+)_([a-z]+)(?:_[0-9]+)?='(.*)'\n$/;
+  my $index = $1;
+  my $prop = $2;
+  my $value = $3; $value =~ s/[-\.:~]/_/g;
+
+  if ( $prop eq "service" ) {
+    $deptree[$index] = $value;
+    printf "%s [shape=box];\n", $value;
+  } else {
+    my $service = $deptree[$index];
+
+    if ( $prop eq "ineed" ) {
+      printf "%s -> %s;\n", $service, $value;
+    } elsif ( $prop eq "iuse" ) {
+      printf "%s -> %s [color=blue];\n", $service, $value;
+    } elsif ( $prop eq "ibefore" ) {
+      printf "%s -> %s [style=dotted];\n", $service, $value;
+    } elsif ( $prop eq "iafter" ) {
+      printf "%s -> %s [style=dotted color=purple];\n", $value, $service;
+    } elsif ( $prop eq "iprovide" ) {
+      printf "%s -> %s [color=red];\n", $value, $service;
+    }
+  }
+}
+
+print "}\n";