From 529a3aa70ab1a3079f2c5ab20fb776e92e2ba1cf Mon Sep 17 00:00:00 2001
From: Lars-Dominik Braun <lars@6xq.net>
Date: Sun, 24 May 2020 09:53:30 +0200
Subject: [PATCH 1/2] gnu: Add mergerfs.

* gnu/packages/storage.scm (mergerfs): New variable.
---
 gnu/packages/storage.scm | 51 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)

diff --git a/gnu/packages/storage.scm b/gnu/packages/storage.scm
index 481ffade5c..b8090c7eaa 100644
--- a/gnu/packages/storage.scm
+++ b/gnu/packages/storage.scm
@@ -23,6 +23,7 @@
   #:use-module (guix packages)
   #:use-module (guix utils)
   #:use-module (guix build-system cmake)
+  #:use-module (guix build-system gnu)
   #:use-module (gnu packages)
   #:use-module (gnu packages admin)
   #:use-module (gnu packages assembly)
@@ -248,3 +249,53 @@ storage protocols (S3, NFS, and others) through the RADOS gateway.")
                    license:cc-by-sa3.0           ;documentation
                    license:bsd-3                 ;isa-l,jerasure,++
                    license:expat))))             ;civetweb,java bindings
+
+(define-public mergerfs
+  (package
+    (name "mergerfs")
+    (version "2.29.0")
+    ;; mergerfs bundles a heavily modified copy of libfuse
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://github.com/trapexit/mergerfs/releases/download/"
+                           version "/mergerfs-" version ".tar.gz"))
+       (sha256
+        (base32
+         "17gizw4vgbqqjd2ykkfpp276942jb5qclp0lkiwkmq1yjgyjqfmk"))))
+    (build-system gnu-build-system)
+    (arguments
+     `(#:tests? #f                      ; no tests exist
+       #:phases
+       (modify-phases %standard-phases
+         (delete 'configure)
+         (add-after 'unpack 'fix-paths
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (setenv "CC" "gcc")
+             ;; These were copied from the package libfuse
+             (substitute* '("libfuse/lib/mount_util.c" "libfuse/util/mount_util.c")
+               (("/bin/(u?)mount" _ maybe-u)
+                (string-append (assoc-ref inputs "util-linux")
+                               "/bin/" maybe-u "mount")))
+             (substitute* '("libfuse/util/mount.mergerfs.c")
+               (("/bin/sh")
+                (which "sh")))
+             ;; The Makefile does not allow overriding PREFIX via make variables
+             (substitute* '("Makefile" "libfuse/Makefile")
+               (("= /usr/local") (string-append "= " (assoc-ref outputs "out")))
+               ;; cannot chown as build user
+               (("chown root:root") "true"))
+             #t)))))
+    (inputs `(("util-linux" ,util-linux)))
+    (home-page "https://github.com/trapexit/mergerfs")
+    (synopsis
+     "Featureful union filesystem")
+    (description
+     "mergerfs is a union filesystem geared towards simplifying storage and
+          management of files across numerous commodity storage devices.  It is
+          similar to mhddfs, unionfs, and aufs.")
+    (license (list
+               ;; mergerfs
+               license:isc
+               ;; imported libfuse code
+               license:gpl2 license:lgpl2.0))))
-- 
2.26.2