add dh-elpa-Version: binary package field

There is a debhelper mechanism for dh_* tools to embed their versions
in generated maintscripts, but our emacsen-common maintscripts are not
true maintscripts, so we can't use that mechanism.

Using a binary package field makes it possible for us to find packages
that need rebuilding without looking inside the contents of any binary
packages.

3 files changed, 11 insertions, 0 deletions

diff --git a/debian/changelog b/debian/changelog
index 40e72ec..1c17bd6 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,11 @@
+dh-elpa (1.10) UNRELEASED; urgency=medium
+
+  * Add dh-elpa-Version: field to binary package control files.
+    This tracks the dh-elpa version used to build the package, to make it
+    possible to find packages that need rebuilding against newer dh-elpa.
+
+ -- Sean Whitton <spwhitton@spwhitton.name>  Wed, 02 Aug 2017 14:22:25 -0400
+
 dh-elpa (1.9) unstable; urgency=medium
 
   * Drop alternative {build-,}depends on emacs24{-nox,}.
diff --git a/debian/rules b/debian/rules
index 554ca48..b5558f4 100755
--- a/debian/rules
+++ b/debian/rules
@@ -11,6 +11,7 @@ override_dh_auto_build:
 	pod2man -c Debhelper --section=1 dh_elpa.in > dh_elpa.1
 	pod2man -c Debhelper --section=1 dh_elpa_test > dh_elpa_test.1
 	sed s/@HELPER_VERSION@/${DEB_VERSION_UPSTREAM}/ < dh_elpa.in > dh_elpa
+	sed s/@HELPER_VERSION@/${DEB_VERSION_UPSTREAM}/ < elpa.pm.in > elpa.pm
 	chmod 755 dh_elpa dh_elpa_test
 
 override_dh_install:
diff --git a/elpa.pm b/elpa.pm.in
index a43f395..0e1f1e9 100755
--- a/elpa.pm
+++ b/elpa.pm.in
@@ -10,6 +10,8 @@ use Config::Tiny;
 
 insert_after("dh_install", "dh_elpa");
 
+add_command_options("dh_gencontrol", "--", "-Ddh-elpa-Version=@HELPER_VERSION@");
+
 # check dh_make_perl version is new enough for dh_elpa_test
 my $info = Module::Metadata->new_from_module("Debian::Control");
 my $version = Dpkg::Version->new($info->version());