From f7cd362ae495365251c1ad48fdced79c68920fa4 Mon Sep 17 00:00:00 2001
From: Charles Duffy <charles@dyfis.net>
Date: Sat, 6 Oct 2018 12:21:05 -0500
Subject: [PATCH 1/2] gnupg20: set version variable to fix gnupg1compat

Presently, gnupg1compat only works with gnupg22. Without this change, the error

```
error: attribute 'version' missing, at .../nixpkgs/pkgs/tools/security/gnupg/1compat.nix:4:26
```

is emitted when evaluating

```
pkgs.gnupg1compat.override { gnupg = pkgs.gnupg20; }'
```
---
 pkgs/tools/security/gnupg/20.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pkgs/tools/security/gnupg/20.nix b/pkgs/tools/security/gnupg/20.nix
index 9404cb1d065516..6ae2bbc436ed52 100644
--- a/pkgs/tools/security/gnupg/20.nix
+++ b/pkgs/tools/security/gnupg/20.nix
@@ -12,7 +12,8 @@ with stdenv.lib;
 assert guiSupport -> pinentry != null;
 
 stdenv.mkDerivation rec {
-  name = "gnupg-2.0.30";
+  name = "gnupg-${version}";
+  version = "2.0.30";
 
   src = fetchurl {
     url = "mirror://gnupg/gnupg/${name}.tar.bz2";

From 1e237142964793c9c3d55faaa3a8cdbe3315c855 Mon Sep 17 00:00:00 2001
From: Charles Duffy <charles@dyfis.net>
Date: Sat, 6 Oct 2018 13:26:35 -0500
Subject: [PATCH 2/2] gnupg1compat: reintroduce symlinks, only when actually
 needed

---
 pkgs/tools/security/gnupg/1compat.nix | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/pkgs/tools/security/gnupg/1compat.nix b/pkgs/tools/security/gnupg/1compat.nix
index eadfbe230b3fbc..371a7ca67afde1 100644
--- a/pkgs/tools/security/gnupg/1compat.nix
+++ b/pkgs/tools/security/gnupg/1compat.nix
@@ -4,14 +4,22 @@ stdenv.mkDerivation {
   name = "gnupg1compat-${gnupg.version}";
 
   builder = writeScript "gnupg1compat-builder" ''
+    PATH=${coreutils}/bin
     # First symlink all top-level dirs
-    ${coreutils}/bin/mkdir -p $out
-    ${coreutils}/bin/ln -s "${gnupg}/"* $out
+    mkdir -p $out
+    ln -s "${gnupg}/"* $out
 
     # Replace bin with directory and symlink it contents
-    ${coreutils}/bin/rm $out/bin
-    ${coreutils}/bin/mkdir -p $out/bin
-    ${coreutils}/bin/ln -s "${gnupg}/bin/"* $out/bin
+    rm $out/bin
+    mkdir -p $out/bin
+    ln -s "${gnupg}/bin/"* $out/bin
+
+    # Add symlinks for any executables that end in 2 and lack any non-*2 version
+    for f in $out/bin/*2; do
+      [[ -x $f ]] || continue # ignore failed globs and non-executable files
+      [[ -e ''${f%2} ]] && continue # ignore commands that already have non-*2 versions
+      ln -s -- "''${f##*/}" "''${f%2}"
+    done
   '';
 
   meta = gnupg.meta // {