From 5dbc7d0f7b2d655b5c6305850f77b6aca0dcf28f Mon Sep 17 00:00:00 2001
From: Ghislain Vaillant <ghislain.vaillant@inria.fr>
Date: Mon, 24 Aug 2026 15:23:29 +0200
Subject: hep: Add recola2.

* guix-science/packages/hep.scm (recola2): New variable.
---
 guix-science/packages/hep.scm | 82 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)

diff --git a/guix-science/packages/hep.scm b/guix-science/packages/hep.scm
index 3140aff..aa8c990 100644
--- a/guix-science/packages/hep.scm
+++ b/guix-science/packages/hep.scm
@@ -1163,6 +1163,88 @@ numerical computation of EW and QCD amplitudes in the Standard Model at
 next-to-leading order.")
     (license license:gpl3)))
 
+(define-public recola2
+  (package
+    (name "recola2")
+    (version "2.3.0")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://gitlab.com/recola/recola2.git")
+             (commit version)))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "1xp0k1mc4c74k3hxb13s9qzdddwzmz3pazr5k8nmyixzdq1gii0j"))))
+    (build-system cmake-build-system)
+    (arguments
+     (list
+      #:configure-flags
+      #~(list "-Dwith_smtests:BOOL=ON"
+              (string-append "-Dcollier_DIR:PATH="
+                             #$(this-package-input "collier") "/lib/cmake")
+              (string-append "-DMDL_SEARCH_PATH:PATH="
+                             #$(this-package-input "recola2-modelfile-sm")
+                             "/lib/cmake"))
+      #:imported-modules (append %cmake-build-system-modules
+                                 %pyproject-build-system-modules)
+      #:modules '((guix build cmake-build-system)
+                  ((guix build pyproject-build-system)
+                   #:prefix py:)
+                  (guix build utils))
+      #:phases
+      #~(modify-phases %standard-phases
+          ;; Requires install first.
+          (delete 'check)
+
+          (add-after 'install 'check
+            (lambda* (#:key tests? #:allow-other-keys)
+              (when tests?
+                (invoke "make" "check"))))
+
+          (add-before 'check 'add-installed-pythonpath
+            (lambda* (#:key inputs outputs #:allow-other-keys)
+              (py:add-installed-pythonpath inputs outputs))))))
+    (inputs (list collier recola2-modelfile-sm))
+    (native-inputs (list gfortran python-wrapper))
+    (home-page "https://recola.gitlab.io/")
+    (synopsis "Recursive Computation of 1-Loop Amplitudes (version 2)")
+    (description
+     "Recola2 is a Fortran95 computer program for the automated generation and
+numerical evaluation of amplitudes in general quantum field theories at one-loop
+order.  It is the successor of Recola and extends it by additional features.")
+    (license license:gpl3)))
+
+(define-public recola2-modelfile-sm
+  (let ((commit "83cc243dbce331e41905bd0d95e232f62263d380")
+        (revision "0")
+        (version "2.2.3"))
+  (package
+    (name "recola2-modelfile-sm")
+    (version (git-version version revision commit))
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://gitlab.com/recola/models/sm.git")
+             (commit commit)))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "0i4pc54b0y5lpaylxvkrbrp4d3aaxd1fd7wx5ycf145zgl64df7n"))))
+    (build-system cmake-build-system)
+    (arguments
+     (list
+      #:tests? #f ;no tests
+      #:configure-flags
+      #~(list (string-append "-DCOLLIER_LIB_PATH:PATH="
+                             #$(this-package-input "collier") "/lib/cmake"))))
+    (inputs (list collier))
+    (native-inputs (list gfortran))
+    (home-page "https://recola.gitlab.io/modelfiles/sm.html")
+    (synopsis "Standard model for Recola2")
+    (description "Standard model for Recola2.")
+    (license license:gpl3))))
+
 (define-public sherpa
   (package
     (name "sherpa")
-- 
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