Subject: [PATCH] gnu: Add nlohmann-json.

From: jgart <[email-masked]>
Date: Tue, 21 Feb 2023 07:40:23 +0100

* gnu/packages/web.scm (nlohmann-json): New variable.
---
 gnu/packages/web.scm | 48 +++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 47 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/web.scm b/gnu/packages/web.scm
index 98db004482..e2f9dddf06 100644
--- a/gnu/packages/web.scm
+++ b/gnu/packages/web.scm
@@ -58,7 +58,7 @@
 ;;; Copyright © 2022 cage <[email-masked]>
 ;;; Copyright © 2022 Pradana Aumars <[email-masked]>
 ;;; Copyright © 2022 Petr Hodina <[email-masked]>
-;;; Copyright © 2022 jgart <[email-masked]>
+;;; Copyright © 2022, 2023 jgart <[email-masked]>
 ;;; Copyright © 2023 Paul A. Patience <[email-masked]>
 ;;; Copyright © 2022 Bruno Victal <[email-masked]>
 ;;; Copyright © 2023 David Thompson <[email-masked]>
@@ -1109,6 +1109,52 @@ (define-public jansson
 data.")
     (license license:expat)))
 
+(define-public nlohmann-json
+  (package
+    (name "nlohmann-json")
+    (version "3.11.2")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/nlohmann/json")
+             (commit (string-append "v" version))))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "0g6rfsbkvrxmacchz4kbr741yybj7mls3r4hgyfdd3pdbqhn2is9"))))
+    (build-system cmake-build-system)
+    (arguments
+      (list #:out-of-source? #t
+            #:configure-flags
+            #~(list "-DJSON_FastTests=ON"
+                    "-DJSON_MultipleHeaders=ON"
+                    "-DJSON_BuildTests=ON"
+                    (string-append "-DJSON_TestDataDirectory="
+                                   #$(this-package-native-input "json-test-data")))
+            #:phases
+            #~(modify-phases %standard-phases
+                (replace 'check
+                  (lambda* (#:key tests? #:allow-other-keys)
+                    ;; Skip tests that require git or modify “installed files”.
+                    (when tests?
+                      (invoke "make" "ARGS=-LE 'not_reproducible|git_required' --verbose")))))))
+    (native-inputs
+      `(("json-test-data"
+         ,(origin
+            (method git-fetch)
+            (uri (git-reference
+                  (url "https://github.com/nlohmann/json_test_data")
+                  (commit "v3.1.0")))
+            (sha256
+             (base32 "0nbirc428qx0lpi940p7y24fzdjbwl6xig3h5rdbihyymmdzhvbc"))
+            (file-name (git-file-name "vis-test" version))))))
+    (home-page "https://json.nlohmann.me/")
+    (synopsis "JSON for Modern C++")
+    (description "This package provides a JSON implementation with an
+intuitive syntax for C++, a single include header file, and with a
+codebase that has 100% code coverage.")
+    (license license:expat)))
+
 (define-public json-c
   (package
     (name "json-c")
-- 
2.39.1