From 9e3b0367cfd63f21a0519b61b6fd13e94dac1c51 Mon Sep 17 00:00:00 2001
From: Anders Leino <aleino@nvidia.com>
Date: Tue, 15 Oct 2024 19:11:53 +0300
Subject: Enable WebGPU tests in CI (#5239)

---
 cmake/FetchedSharedLibrary.cmake | 83 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 cmake/FetchedSharedLibrary.cmake

(limited to 'cmake/FetchedSharedLibrary.cmake')

diff --git a/cmake/FetchedSharedLibrary.cmake b/cmake/FetchedSharedLibrary.cmake
new file mode 100644
index 000000000..d63f03d29
--- /dev/null
+++ b/cmake/FetchedSharedLibrary.cmake
@@ -0,0 +1,83 @@
+# Add rules to copy & install shared library of name 'library_name' in the 'module_subdir' directory.
+# If 'url' is a directory, the shared library (with platform-specific shared library prefixes and suffixes) will be
+# taken from the directory, and whatever is found there will be used to produce the install rule.
+# If the 'url' is a path to a file with the platform-specific shared library prefix and suffix, then that file
+# will be used to produce the install rule.
+# Otherwise, the 'url' is interpreted as an URL, and the content of the URL will be fetched, extracted and searched
+# for the shared library to produce the install rule.
+function(copy_fetched_shared_library library_name url)
+    set(shared_library_filename
+        "${CMAKE_SHARED_LIBRARY_PREFIX}${library_name}${CMAKE_SHARED_LIBRARY_SUFFIX}"
+    )
+    macro(from_glob dir)
+        # A little helper function
+        file(
+            GLOB_RECURSE source_object
+            "${dir}/${shared_library_filename}"
+        )
+        list(LENGTH source_object nmatches)
+        if(nmatches EQUAL 0)
+            message(
+                SEND_ERROR
+                "Unable to find ${shared_library_filename} in ${url}"
+            )
+        elseif(nmatches GREATER 1)
+            message(
+                SEND_ERROR
+                "Found multiple files named ${shared_library_filename} in ${url}"
+            )
+        endif()
+    endmacro()
+
+    if(IS_DIRECTORY "${url}")
+        # Just glob directly from a local directory
+        from_glob("${url}")
+    elseif(
+        url
+            MATCHES
+            "${CMAKE_SHARED_LIBRARY_PREFIX}.+${CMAKE_SHARED_LIBRARY_SUFFIX}$"
+        AND EXISTS "${url}"
+    )
+        # Otherwise, if it's a direct path to a shared object, use that
+        set(source_object "${url}")
+    else()
+        # Otherwise, download and extract from whatever URL we have
+        fetchcontent_declare(${library_name} URL "${url}")
+        fetchcontent_populate(${library_name})
+        from_glob(${${library_name}_SOURCE_DIR})
+    endif()
+
+    set(dest_object
+        ${CMAKE_BINARY_DIR}/$<CONFIG>/${module_subdir}/${shared_library_filename}
+    )
+    add_custom_command(
+        OUTPUT ${dest_object}
+        COMMAND
+            ${CMAKE_COMMAND} -E copy_if_different ${source_object}
+            ${dest_object}
+        DEPENDS ${source_object}
+        VERBATIM
+    )
+    # Give this copying action a name
+    add_custom_target(copy-${library_name} DEPENDS ${dest_object})
+    set_target_properties(copy-${library_name} PROPERTIES FOLDER generated)
+
+    # Put this into a library target
+    add_library(${library_name} MODULE IMPORTED GLOBAL)
+    add_dependencies(${library_name} copy-${library_name})
+    set_property(
+        TARGET ${library_name}
+        PROPERTY IMPORTED_LOCATION ${dest_object}
+    )
+endfunction()
+
+function(install_fetched_shared_library library_name url)
+    copy_fetched_shared_library(${library_name} ${url})
+    set(shared_library_filename
+        "${CMAKE_SHARED_LIBRARY_PREFIX}${library_name}${CMAKE_SHARED_LIBRARY_SUFFIX}"
+    )
+    set(dest_object
+        ${CMAKE_BINARY_DIR}/$<CONFIG>/${module_subdir}/${shared_library_filename}
+    )
+    install(PROGRAMS ${dest_object} DESTINATION ${module_subdir})
+endfunction()
-- 
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