vulkan-loader: new port

graphics/vulkan-loader/Portfile

@@ -0,0 +1,47 @@
+# -*- coding: utf-8; mode: tcl; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- vim:fenc=utf-8:ft=tcl:et:sw=4:ts=4:sts=4
+
+PortSystem          1.0
+PortGroup           github 1.0
+PortGroup           cmake 1.0
+
+github.setup        KhronosGroup Vulkan-Loader sdk-1.1.101.0
+name                vulkan-loader
+version             1.1.101.0
+
+categories          graphics devel
+platforms           darwin
+license             Apache-2
+
+maintainers         {@eintw1ck itanimul.li:josh} openmaintainer
+description         Vulkan loader
+long_description    Loader for Vulkan Installable Client Drivers (ICDs) and Vulkan Layers. \
+                    While MoltenVK on macOS can be linked to directly, it is a Level 0 ICD \
+                    and thus requires a loader in order to use Layers.
+
+depends_build       port:moltenvk port:vulkan-headers port:python37
+
+homepage            https://vulkan.lunarg.com
+checksums           sha256  fb111c9855ca0a0c6fc033530a318e7c9e7b9e1b0ceb8ae0b7962ff8d33ecd58 \
+                    rmd160  74bafe603877202f150364c1d843f2d3ec5b5774 \
+                    size    1346500
+use_zip             no
+
+
+configure.args-append -DPython_ADDITIONAL_VERSIONS=3.7 -DFALLBACK_DATA_DIRS=${prefix}/share:/usr/local/share:/usr/share
+
+variant manifest description {Install default MoltenVK ICD Manifest} {}
+
+destroot {
+    xinstall -d ${destroot}${prefix}/Library/Frameworks
+    file copy ${worksrcpath}/loader/vulkan.framework ${destroot}${frameworks_dir}/vulkan.framework
+    xinstall -m 755 {*}[glob ${worksrcpath}/loader/*.dylib] ${destroot}${prefix}/lib/
+
+    if {[variant_isset manifest]} {
+        xinstall -d ${destroot}${prefix}/share/vulkan/icd.d
+        file copy ${portpath}/files/MoltenVK_icd.json ${workpath}/MoltenVK_icd.json
+        reinplace "s|@@PREFIX@@|${prefix}|g" ${workpath}/MoltenVK_icd.json
+        xinstall -m 644 ${workpath}/MoltenVK_icd.json ${destroot}${prefix}/share/vulkan/icd.d/MoltenVK_icd.json
+    }
+}
+
+default_variants +manifest

graphics/vulkan-loader/files/MoltenVK_icd.json

@@ -0,0 +1,7 @@
+{
+    "file_format_version" : "1.0.0",
+    "ICD": {
+        "library_path": "@@PREFIX@@/lib/libMoltenVK.dylib",
+        "api_version" : "1.0.0"
+    }
+}