gnu: Add texlive-latex-ebproof.

* gnu/packages/tex.scm (texlive-latex-ebproof): New variable.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/packages/tex.scm

@@ -16,6 +16,7 @@
 ;;; Copyright © 2020, 2021 Paul Garlick <pgarlick@tourbillion-technology.com>
 ;;; Copyright © 2021 Maxim Cournoyer <maxim.cournoyer@gmail.com>
 ;;; Copyright © 2021 Leo Le Bouter <lle-bout@zaclys.net>
+;;; Copyright © 2021 Xinglu Chen <public@yoctocell.xyz>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -8546,6 +8547,35 @@ theorems.  The package supports saving and reuse of source code and text
 parts.")
       (license license:lppl1.3c+))))
 
+(define-public texlive-latex-ebproof
+  (package
+    (name "texlive-latex-ebproof")
+    (version "2.1.1")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://framagit.org/manu/ebproof")
+             (commit version)))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32
+         "1zkrfaf343js0yc1x7m3d8hzbh5izn0lb01jrmdpjm51kdbh30xq"))))
+    (build-system texlive-build-system)
+    (arguments '(#:tex-directory "latex/ebproof"))
+    (propagated-inputs
+     `(("texlive-latex-l3kernel" ,texlive-latex-l3kernel)))
+    (home-page "http://www.ctan.org/pkg/ebproof")
+    (synopsis
+     "Formal proofs in the style of sequent calculus")
+    (description
+     "This package provides commands to typeset proof trees in the style of
+sequent calculus and related systems.  The commands allow for writing
+inferences with any number of premises and alignment of successive formulas on
+an arbitrary point.  Various options allow complete control over spacing,
+styles of inference rules, placement of labels, etc.")
+    (license license:lppl1.3+)))
+
 (define-public texlive-eurosym
   (let ((template (simple-texlive-package
                    "texlive-eurosym"