qpdf: new package (#44066)

* New package: qpdf

* Update var/spack/repos/builtin/packages/qpdf/package.py

Co-authored-by: Alec Scott <hi@alecbcs.com>

* Fix format of cmake_args

---------

Co-authored-by: Alec Scott <hi@alecbcs.com>

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

@@ -0,0 +1,45 @@
+# 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 Qpdf(CMakePackage):
+    """
+    QPDF is a command-line tool and C++ library that performs
+    content-preserving transformations on PDF files.
+    """
+
+    homepage = "https://qpdf.sourceforge.io/"
+    url = "https://github.com/qpdf/qpdf/releases/download/v11.9.0/qpdf-11.9.0.tar.gz"
+
+    maintainers("taliaferro")
+
+    license("Apache-2.0", checked_by="taliaferro")
+
+    version("11.9.0", sha256="9f5d6335bb7292cc24a7194d281fc77be2bbf86873e8807b85aeccfbff66082f")
+
+    variant(
+        "crypto",
+        values=["openssl", "gnutls", "native", "implicit"],
+        default="implicit",
+        multi=False,
+        description="Provider of cryptographic functions.",
+    )
+
+    depends_on("zlib-api")
+    depends_on("jpeg")
+    depends_on("openssl", when="crypto=openssl")
+    depends_on("gnutls", when="crypto=gnutls")
+
+    def cmake_args(self):
+        args = []
+        if not self.spec.satisfies("crypto=implicit"):
+            crypto_type = self.spec.variants["crypto"].value.upper()
+            args.append("USE_IMPLICIT_CRYPTO=0")
+            args.append(f"REQUIRE_CRYPTO_{crypto_type}=1")
+
+        return args