gnu: biber: Update to 2.12.

* gnu/packages/tex.scm (biber): Update to 2.12.
[source]: Use 'git-fetch'. Add patch.
[inputs]: Add perl-file-slurper. Remove perl-file-slurp.
* gnu/packages/patches/biber-fix-encoding-write.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.

1 files changed, 31 insertions, 0 deletions

diff --git a/gnu/packages/patches/biber-fix-encoding-write.patch b/gnu/packages/patches/biber-fix-encoding-write.patch
new file mode 100644
index 0000000000..56cd11212e
--- /dev/null
+++ b/gnu/packages/patches/biber-fix-encoding-write.patch
@@ -0,0 +1,31 @@
+From 2a9b15aefb842a734637f3d230936ea1b7c60096 Mon Sep 17 00:00:00 2001
+From: Philip Kime <Philip@kime.org.uk>
+Date: Thu, 8 Nov 2018 22:02:09 +0100
+Subject: [PATCH] Fix to address #239
+
+---
+ lib/Biber.pm | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/lib/Biber.pm b/lib/Biber.pm
+index 8b1f80a5..d97fca29 100644
+--- a/lib/Biber.pm
++++ b/lib/Biber.pm
+@@ -311,6 +311,8 @@ sub parse_ctrlfile {
+     unless (eval {$checkbuf = File::Slurper::read_text($ctrl_file_path, 'latin1')}) {
+       biber_error("$ctrl_file_path is not UTF-8 or even latin1, how horrible.");
+     }
++    # Write ctrl file as UTF-8
++    File::Slurper::write_text($ctrl_file_path, NFC($checkbuf));# Unicode NFC boundary
+   }
+ 
+   $checkbuf = NFD($checkbuf);# Unicode NFD boundary
+@@ -319,8 +321,6 @@ sub parse_ctrlfile {
+     unlink($output) unless $output eq '-';# ignore deletion of STDOUT marker
+     biber_error("$ctrl_file_path is malformed, last biblatex run probably failed. Deleted $output");
+   }
+-  # Write ctrl file as UTF-8
+-  File::Slurper::write_text($ctrl_file_path, NFC($checkbuf));# Unicode NFC boundary
+ 
+   # Validate if asked to
+   if (Biber::Config->getoption('validate_control')) {