[bug#32043] [PATCH] gnu: libgit2: Update to 0.26.4 [fixes CVE-2018-11235].

[Leo Famulari <leo@famulari.name>]

* gnu/packages/version-control.scm (libgit2): Update to 0.26.4.
(source): Adjust patch name.
* gnu/packages/patches/libgit2-0.25.1-mtime-0.patch: Rename to ...
* gnu/packages/patches/julia-libgit2-fix.patch: ... this.
* gnu/local.mk (dist_patch_DATA): Adjust accordingly.
---
 gnu/local.mk                                  |  2 +-
 gnu/packages/patches/julia-libgit2-fix.patch  | 22 +++++++++++++++++++
 .../patches/libgit2-0.25.1-mtime-0.patch      | 14 ------------
 gnu/packages/version-control.scm              |  6 ++---
 4 files changed, 26 insertions(+), 18 deletions(-)
 create mode 100644 gnu/packages/patches/julia-libgit2-fix.patch
 delete mode 100644 gnu/packages/patches/libgit2-0.25.1-mtime-0.patch

diff --git a/gnu/local.mk b/gnu/local.mk
index 10b61ba1b..2a1d2d42d 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -860,7 +860,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/libevent-2.1-skip-failing-test.patch	\
   %D%/packages/patches/libexif-CVE-2016-6328.patch		\
   %D%/packages/patches/libexif-CVE-2017-7544.patch		\
-  %D%/packages/patches/libgit2-0.25.1-mtime-0.patch		\
+  %D%/packages/patches/libgit2-mtime-0.patch			\
   %D%/packages/patches/libgdata-fix-tests.patch			\
   %D%/packages/patches/libgdata-glib-duplicate-tests.patch	\
   %D%/packages/patches/libgnome-encoding.patch			\
diff --git a/gnu/packages/patches/julia-libgit2-fix.patch b/gnu/packages/patches/julia-libgit2-fix.patch
new file mode 100644
index 000000000..599e01f4b
--- /dev/null
+++ b/gnu/packages/patches/julia-libgit2-fix.patch
@@ -0,0 +1,22 @@
+commit 782460f9bab4af35097c13c4dbab61cb263490b9
+Author: Milan Bouchet-Valat <nalimilan@club.fr>
+Date:   Tue Jul 11 10:02:32 2017 +0200
+
+    Fix libgit2 test failure with system libgit2 and OpenSSL (#22722)
+    
+    The first letter of the error message is in lowercase in some systems,
+    notably Fedora Rawhide with libgit2 0.26 and OpenSSL 1.1.0f.
+
+diff --git a/test/libgit2.jl b/test/libgit2.jl
+index d7e32d21a9..f5104e9ec7 100644
+--- a/test/libgit2.jl
++++ b/test/libgit2.jl
+@@ -1905,7 +1905,8 @@ mktempdir() do dir
+                         deserialize(f)
+                     end
+                     @test err.code == LibGit2.Error.ECERTIFICATE
+-                    @test startswith(err.msg, "The SSL certificate is invalid")
++                    @test startswith(lowercase(err.msg),
++                                     lowercase("The SSL certificate is invalid"))
+ 
+                     rm(errfile)
diff --git a/gnu/packages/patches/libgit2-0.25.1-mtime-0.patch b/gnu/packages/patches/libgit2-0.25.1-mtime-0.patch
deleted file mode 100644
index a6fdb50ff..000000000
--- a/gnu/packages/patches/libgit2-0.25.1-mtime-0.patch
+++ /dev/null
@@ -1,14 +0,0 @@
-The Clar test framework has a bug whereby it skips the parsing phase
-on files with mtime=0.
-
-Reported upstream at <https://github.com/vmg/clar/pull/78>.
-
-diff --git a/tests/generate.py b/tests/generate.py
-index b639c8f..111ca41 100644
---- a/tests/generate.py
-+++ b/tests/generate.py
-@@ -63,3 +63,3 @@ class Module(object):
- 
--        self.mtime = 0
-+        self.mtime = None # Guix sets all file mtimes to '0'
-         self.enabled = True
diff --git a/gnu/packages/version-control.scm b/gnu/packages/version-control.scm
index 86d6afef3..2bd59ae95 100644
--- a/gnu/packages/version-control.scm
+++ b/gnu/packages/version-control.scm
@@ -419,7 +419,7 @@ everything from small to very large projects with speed and efficiency.")
 (define-public libgit2
   (package
     (name "libgit2")
-    (version "0.26.0")
+    (version "0.26.4")
     (source (origin
               (method url-fetch)
               (uri (string-append "https://github.com/libgit2/libgit2/"
@@ -427,8 +427,8 @@ everything from small to very large projects with speed and efficiency.")
               (file-name (string-append name "-" version ".tar.gz"))
               (sha256
                (base32
-                "1b3figbhp5l83vd37vq6j2narrq4yl9pfw6mw0px0dzb1hz3jqka"))
-              (patches (search-patches "libgit2-0.25.1-mtime-0.patch"))
+                "15ybzypyggx64ba7i0zxnnbvzh7z34fcrkwk2xj54kmv1dha4br9"))
+              (patches (search-patches "libgit2-mtime-0.patch"))
 
               ;; Remove bundled software.
               (snippet '(begin
-- 
2.18.0