[jwt-cpp] New package (#37641)

* [jwt-cpp] New package

* Update homepage

Co-authored-by: Wouter Deconinck <wdconinc@gmail.com>

* [@spackbot] updating style on behalf of greenc-FNAL

---------

Co-authored-by: Wouter Deconinck <wdconinc@gmail.com>
Co-authored-by: greenc-FNAL <greenc-FNAL@users.noreply.github.com>

var/spack/repos/builtin/packages/jwt-cpp/package.py

@@ -0,0 +1,49 @@
+# Copyright 2013-2023 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack.package import *
+
+
+class JwtCpp(CMakePackage):
+    """A header only library for creating and validating JSON Web Tokens in C++11."""
+
+    homepage = "https://thalhammer.github.io/jwt-cpp/"
+    url = "https://github.com/Thalhammer/jwt-cpp/archive/refs/tags/v0.4.0.tar.gz"
+
+    maintainers("gartung", "greenc-FNAL", "marcmengel", "vitodb")
+
+    version("0.6.0", sha256="0227bd6e0356b211341075c7997c837f0b388c01379bd256aa525566a5553f03")
+    version("0.5.2", sha256="d3188f9611597eb1bb285169879e1d87202bf10a08e4e7734c9f2097bfd4a850")
+    version("0.5.1", sha256="d8f5ffb361824630b3b6f4aad26c730c915081071040c232ac57947d6177ef4f")
+    version("0.5.0", sha256="079a273f070dd11213e301712319a65881e51ab81535cc436d5313191df852a2")
+    version("0.4.0", sha256="f0dcc7b0e8bef8f9c3f434e7121f9941145042c9fe3055a5bdd709085a4f2be4")
+
+    # TODO: jwt-cpp>=0.6.0 supports wolfSSL for which there is currently
+    # no Spack recipe.
+    variant(
+        "ssl",
+        default="openssl",
+        values=("openssl", "libressl"),
+        multi=False,
+        when="@0.5.0:",
+        description="SSL library to use",
+    )
+
+    depends_on("openssl@1.0.2:", when="@0.4.0:0.4.99")
+    depends_on("openssl@1.0.2:", when="@0.5.0:0.5.99 ssl=openssl")
+    depends_on("openssl@1.0.1:", when="@0.6.0: ssl=openssl")
+    depends_on("libressl@3:", when="@0.5.0: ssl=libressl")
+
+    def cmake_args(self):
+        spec = self.spec
+        define = self.define
+        args = []
+        if spec.satisfies("@0.5.0:"):
+            ssl_library_dict = {"openssl": "OpenSSL", "libressl": "LibreSSL"}
+            args.append(define("JWT_SSL_LIBRARY", ssl_library_dict[spec.variants["ssl"].value]))
+            args += [define("JWT_BUILD_TESTS", False), define("JWT_BUILD_EXAMPLES", False)]
+        else:
+            args.append(define("BUILD_TESTS", False))
+        return args