[pkg-gnupg-maint] Bug#980768: gnupg2: reduce Build-Depends

[Helmut Grohne]

Source: gnupg2
Version: 2.2.20-1
Tags: patch
User: helmutg at debian.org
Usertags: rebootstrap

gnupg2 participates in a number of dependency cycles relevant to
architecture bootstrap. Instead of looking into such a hard problem, I
looked into easily droppable dependencies and found some. Since gnupg2
is normally reproducible, I verified that performing a nocheck build
with the following dependencies turned into Build-Conflicts results in
precisely the same binary artifacts as a regular full build.

 * ghostscript was used to create doc/gnupg-card-architecture.pdf, but
   this step is not performed during build.
 * imagemagick's convert and transfig's fig2dev are mentioned in
   doc/Makefile.am, but since the relevant artifacts are included in the
   source distribution, they're not run during build.
 * libcurl4-gnutls-dev is unused. While curl is mentioned in source
   comments and checked for in configure, it is never actually used.
 * librsvg2-bin's rsvg-convert is never mentioned anywhere.

Please consider applying the attached patch.

Helmut
-------------- next part --------------
diff --minimal -Nru gnupg2-2.2.20/debian/changelog gnupg2-2.2.20/debian/changelog
--- gnupg2-2.2.20/debian/changelog	2020-03-23 20:05:13.000000000 +0100
+++ gnupg2-2.2.20/debian/changelog	2021-01-21 13:53:34.000000000 +0100
@@ -1,3 +1,19 @@
+gnupg2 (2.2.20-1.1) UNRELEASED; urgency=medium
+
+  * Non-maintainer upload.
+  * Reduce Build-Depends: (Closes: #-1)
+    + Drop unused ghostscript. It is used to create
+      doc/gnupg-card-architecture.pdf, but the invocations for doing so are
+      missing from the source.
+    + Drop unused imagemagick and transfig. Both convert and fig2dev are used
+      in doc/Makefile.am, but since the relevant output artifacts are
+      included, they're not run.
+    + Drop unused libcurl4-gnutls-dev. curl is mentioned in source comments
+      and checked for in configure, but never actually used.
+    + Drop unused librsvg2-bin. It is not mentioned anywhere nor used.
+
+ -- Helmut Grohne <helmut at subdivi.de>  Thu, 21 Jan 2021 13:53:34 +0100
+
 gnupg2 (2.2.20-1) unstable; urgency=medium
 
   * New upstream release
diff --minimal -Nru gnupg2-2.2.20/debian/control gnupg2-2.2.20/debian/control
--- gnupg2-2.2.20/debian/control	2020-03-23 20:04:11.000000000 +0100
+++ gnupg2-2.2.20/debian/control	2021-01-21 13:53:34.000000000 +0100
@@ -12,12 +12,9 @@
  debhelper-compat (= 12),
  file,
  gettext,
- ghostscript,
  gpgrt-tools,
- imagemagick,
  libassuan-dev (>= 2.5.0),
  libbz2-dev,
- libcurl4-gnutls-dev,
  libgcrypt20-dev (>= 1.7.0),
  libgnutls28-dev (>= 3.0),
  libgpg-error-dev (>= 1.35),
@@ -25,13 +22,11 @@
  libldap2-dev,
  libnpth0-dev (>= 1.2),
  libreadline-dev,
- librsvg2-bin,
  libsqlite3-dev,
  libusb-1.0-0-dev [!hurd-any],
  openssh-client <!nocheck>,
  pkg-config,
  texinfo,
- transfig,
  zlib1g-dev | libz-dev,
 Build-Depends-Indep:
  binutils-multiarch [!amd64 !i386],