scnlib: new package (#46313)

var/spack/repos/builtin/packages/scnlib/package.py

@@ -0,0 +1,61 @@
+# Copyright 2013-2024 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 Scnlib(CMakePackage):
+    """scanf for modern C++"""
+
+    homepage = "https://scnlib.dev"
+    url = "https://github.com/eliaskosunen/scnlib/archive/refs/tags/v3.0.1.tar.gz"
+
+    maintainers("pranav-sivaraman")
+
+    license("Apache-2.0", checked_by="pranav-sivaraman")
+
+    version("3.0.1", sha256="bc8a668873601d00cce6841c2d0f2c93f836f63f0fbc77997834dea12e951eb1")
+
+    variant("shared", default=True, description="Build shared libs")
+    variant(
+        "regex-backend",
+        default="std",
+        description="Regex backend to use",
+        multi=False,
+        values=("std", "Boost"),
+    )
+    variant(
+        "icu",
+        default=False,
+        description="Use the ICU when using the Boost regex backend",
+        when="regex-backend=Boost",
+    )
+
+    depends_on("cxx", type="build")
+    depends_on("cmake@3.16:", type="build")
+
+    depends_on("fast-float@5:")
+
+    depends_on("boost +regex cxxstd=17", when="regex-backend=Boost")
+    depends_on("boost +icu", when="+icu")
+
+    depends_on("googletest cxxstd=17", type="test")
+    depends_on("python@3:", type="test")
+
+    def cmake_args(self):
+        args = [
+            self.define("SCN_TESTS", self.run_tests),
+            self.define("SCN_BENCHMARKS", False),
+            self.define("SCN_EXAMPLES", False),
+            self.define("SCN_DOCS", False),
+            self.define("SCN_USE_EXTERNAL_FAST_FLOAT", True),
+            self.define("SCN_USE_EXTERNAL_GTEST", True),
+            self.define("SCN_USE_EXTERNAL_BENCHMARK", True),
+            self.define("SCN_USE_EXTERNAL_REGEX_BACKEND", True),
+            self.define_from_variant("BUILD_SHARED_LIBS", "shared"),
+            self.define_from_variant("SCN_REGEX_BACKEND", "regex-backend"),
+        ]
+
+        return args