From e16d9d66b228b36d148caa57870a2a8068894b5f Mon Sep 17 00:00:00 2001
From: Sean Whitton <spwhitton@spwhitton.name>
Date: Thu, 17 Dec 2015 11:18:59 -0700
Subject: put ELPA deps into substvar

---
 dh_elpa.in | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

(limited to 'dh_elpa.in')

diff --git a/dh_elpa.in b/dh_elpa.in
index cd02027..79d7b67 100755
--- a/dh_elpa.in
+++ b/dh_elpa.in
@@ -234,10 +234,16 @@ foreach my $package (@{$dh{DOPACKAGES}}) {
 
   }
 
-  if ($dh{BYTECOMPILE}) {
-    my $desc = read_package_desc ($tempdir,$elpapkg);
+  my $desc = read_package_desc ($tempdir,$elpapkg);
+  my $deps = $desc->{'ELPA-Requires'};
+
+  # TODO: addsubstvar fails to add a variable if its blank.  So if the
+  # package has no ELPA dependencies, we should tell the user not to
+  # use this substvar in debian/control
+  addsubstvar($package, 'elpa:Depends', $deps);
 
-    addsubstvar($package,'misc:Depends','emacsen-common');
+  if ($dh{BYTECOMPILE}) {
+    addsubstvar($package, 'misc:Depends', 'emacsen-common');
     maybe_install_helper($package, 'compat', '0644', $desc);
     maybe_install_helper($package, 'install', '0755', $desc);
     maybe_install_helper($package, 'remove', '0755', $desc);
@@ -254,7 +260,7 @@ foreach my $package (@{$dh{DOPACKAGES}}) {
 
 =head1 SUBSTVARS
 
-dh_elpa currently defines two substvars (cf. deb-substvars(5)) that
+dh_elpa currently defines three substvars (cf. deb-substvars(5)) that
 can be used in debian/control
 
 =over 4
@@ -267,6 +273,12 @@ These are dependencies needed by every dh_elpa based package.
 
 This adds a value suitable for a Built-Using header identifying the version of dh_elpa used at build time.
 
+=item ${elpa:Depends}
+
+These are dependencies on other ELPA packages as given in the Package-Requires: line of the package's main Emacs Lisp file.
+
+Note that Emacs Lisp dependencies packaged outside the elpa-* dpkg namespace must be specified manually.  For example, the s.el library is provided by the binary package s-el.  If dh_elpa adds dependency elpa-x where x is an Emacs Lisp binary package outside the elpa-* namespace, please file a bug against dh_elpa to have an exclusion added.
+
 =back
 
 =head1 EXAMPLES
-- 
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