From 4e9b94836fb3b548685bab95d4c07caa03fc0748 Mon Sep 17 00:00:00 2001
From: Echo Nolan <echo@echonolan.net>
Date: Sat, 22 Feb 2020 02:16:29 -0800
Subject: [PATCH] libeatmydata: fix launcher script - find shell library
 properly

The new version of the launcher script in version 105 doesn't have the #8665
bug, but it does try to find the shell library using Debian tools, which
obviously doesn't work on Nix. Removed the now-unneccessary makeWrapper and
patched out the Debian bits.
---
 .../libraries/libeatmydata/default.nix        | 11 +++++-----
 .../libeatmydata/find-shell-lib.patch         | 20 +++++++++++++++++++
 2 files changed, 25 insertions(+), 6 deletions(-)
 create mode 100644 pkgs/development/libraries/libeatmydata/find-shell-lib.patch

diff --git a/pkgs/development/libraries/libeatmydata/default.nix b/pkgs/development/libraries/libeatmydata/default.nix
index 5127231dab6..29ca85cdeb0 100644
--- a/pkgs/development/libraries/libeatmydata/default.nix
+++ b/pkgs/development/libraries/libeatmydata/default.nix
@@ -2,17 +2,16 @@
 
 stdenv.mkDerivation rec {
   name = "libeatmydata-105";
-  
+
   src = fetchurl {
     url = "https://www.flamingspork.com/projects/libeatmydata/${name}.tar.gz";
     sha256 = "1pd8sc73cgc41ldsvq6g8ics1m5k8gdcb91as9yg8z5jnrld1lmx";
   };
 
-  buildInputs = [ makeWrapper ];
-
-  postInstall = ''
-    wrapProgram $out/bin/eatmydata \
-      --prefix PATH : $out/bin
+  patches = [ ./find-shell-lib.patch ];
+  patchFlags = "-p0";
+  postPatch = ''
+    substituteInPlace eatmydata.in --replace NIX_OUT_DIR $out
   '';
 
   meta = {
diff --git a/pkgs/development/libraries/libeatmydata/find-shell-lib.patch b/pkgs/development/libraries/libeatmydata/find-shell-lib.patch
new file mode 100644
index 00000000000..a6320edda29
--- /dev/null
+++ b/pkgs/development/libraries/libeatmydata/find-shell-lib.patch
@@ -0,0 +1,20 @@
+--- eatmydata.in	2020-02-01 18:10:59.618679823 -0800
++++ eatmydata.in.new	2020-02-01 18:08:25.092620247 -0800
+@@ -15,15 +15,8 @@
+ # You should have received a copy of the GNU General Public License
+ # along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ 
+-export `dpkg-architecture|grep DEB_BUILD_MULTIARCH`
+-
+-shlib="/usr/lib/$DEB_BUILD_MULTIARCH/eatmydata.sh"
+-if [ -f "$shlib" ]; then
+-    . "$shlib"
+-else
+-    echo "Unable to locate eatmydata shell library, it was not enabled" >&2
+-    exec "$@"
+-fi
++shlib="NIX_OUT_DIR/libexec/eatmydata.sh"
++. "$shlib"
+ 
+ usage()
+ {