Invoke runit-helper only if it is available

2 files changed, 19 insertions, 1 deletions

diff --git a/debian/changelog b/debian/changelog
index b405140..aef4f18 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,10 @@
+dh-runit (2.7.2) unstable; urgency=medium
+
+  * Invoke runit-helper only if it is available. It ensures, that in
+    pathological case, when it isn't (piuparts), postrm script do not fail.
+
+ -- Dmitry Bogatov <KAction@gnu.org>  Sat, 14 Apr 2018 17:58:58 +0300
+
 dh-runit (2.7.1) unstable; urgency=medium
 
   * Upload to unstable.
diff --git a/postrm-runit b/postrm-runit
index edd9ee7..a306688 100644
--- a/postrm-runit
+++ b/postrm-runit
@@ -1,7 +1,18 @@
 # -*- shell-script -*-
 export NAME='#NAME#'
-/lib/runit-helper/runit-helper postrm "$@"
+
+# Unfortunately, we can not assume, that bin:runit-helper package
+# is installed at postrm stage.
+#
+# The only other option is embed whole runit-helper script here,
+# into postrm script of -run package, but it would be like static
+# linking, requiring rebuild of all reverse dependencies on every
+# change of dh-runit.
+if [ -x /lib/runit-helper/runit-helper ] ; then
+    /lib/runit-helper/runit-helper postrm "$@"
+fi
 
 # Local Variables:
 # eval: (sh-set-shell "sh" t nil)
 # End:
+# vim: ft=sh:sw=4