From 636a6a2fb808752f3105f86160d9318748eca561 Mon Sep 17 00:00:00 2001
From: Timothy Flynn <trflynn89@pm.me>
Date: Tue, 8 Feb 2022 11:11:03 -0500
Subject: [PATCH] Meta: Add a CPack installation target for js(1)

This adds a CPack configuration to generate a release package for js(1).
Our current CMake requirement is 3.16, which doesn't have a great story
for automatically installing a binary target's library dependencies. If
we eventually require CMake 3.21 or above, we can remove the helper
.cmake file added here in lieu of RUNTIME_DEPENDENCIES.
---
 Meta/Lagom/CMakeLists.txt                   | 20 ++++++++++--
 Meta/Lagom/get_linked_lagom_libraries.cmake | 34 +++++++++++++++++++++
 2 files changed, 51 insertions(+), 3 deletions(-)
 create mode 100644 Meta/Lagom/get_linked_lagom_libraries.cmake

diff --git a/Meta/Lagom/CMakeLists.txt b/Meta/Lagom/CMakeLists.txt
index e2eed966f4..2b42dfa1fb 100644
--- a/Meta/Lagom/CMakeLists.txt
+++ b/Meta/Lagom/CMakeLists.txt
@@ -304,7 +304,7 @@ if (BUILD_LAGOM)
     )
 
     # ELF
-    # FIXME: Excluding arm64 is a temporary hack to circumvent a build problem 
+    # FIXME: Excluding arm64 is a temporary hack to circumvent a build problem
     #        for Lagom on Apple M1
     if (NOT CMAKE_SYSTEM_PROCESSOR MATCHES "arm64")
         file(GLOB LIBELF_SOURCES CONFIGURE_DEPENDS "../../Userland/Libraries/LibELF/*.cpp")
@@ -462,7 +462,7 @@ if (BUILD_LAGOM)
     )
 
     # x86
-    # FIXME: Excluding arm64 is a temporary hack to circumvent a build problem 
+    # FIXME: Excluding arm64 is a temporary hack to circumvent a build problem
     #        for Lagom on Apple M1
     if (NOT CMAKE_SYSTEM_PROCESSOR MATCHES "arm64")
         file(GLOB LIBX86_SOURCES CONFIGURE_DEPENDS "../../Userland/Libraries/LibX86/*.cpp")
@@ -484,7 +484,7 @@ if (BUILD_LAGOM)
         set_target_properties(adjtime_lagom PROPERTIES OUTPUT_NAME adjtime)
         target_link_libraries(adjtime_lagom LagomCore LagomMain)
 
-        # FIXME: Excluding arm64 is a temporary hack to circumvent a build problem 
+        # FIXME: Excluding arm64 is a temporary hack to circumvent a build problem
         #        for Lagom on Apple M1
         if (NOT CMAKE_SYSTEM_PROCESSOR MATCHES "arm64")
             add_executable(disasm_lagom ../../Userland/Utilities/disasm.cpp)
@@ -658,6 +658,20 @@ if (BUILD_LAGOM)
                 PASS_REGULAR_EXPRESSION "PASS"
             )
         endforeach()
+
+        # FIXME: When we are using CMake >= 3.21, the library installations can be replaced with RUNTIME_DEPENDENCIES.
+        #        https://cmake.org/cmake/help/latest/command/install.html
+        include(get_linked_lagom_libraries.cmake)
+        get_linked_lagom_libraries(js_lagom js_lagom_libraries)
+
+        install(TARGETS js_lagom ${js_lagom_libraries} COMPONENT js)
+
+        set(CPACK_GENERATOR "TGZ")
+        set(CPACK_STRIP_FILES TRUE)
+        set(CPACK_ARCHIVE_COMPONENT_INSTALL ON)
+        set(CPACK_COMPONENTS_ALL js)
+        set(CPACK_PACKAGE_FILE_NAME serenity-js)
+        include(CPack)
     endif()
 endif()
 
diff --git a/Meta/Lagom/get_linked_lagom_libraries.cmake b/Meta/Lagom/get_linked_lagom_libraries.cmake
new file mode 100644
index 0000000000..a77928bbfb
--- /dev/null
+++ b/Meta/Lagom/get_linked_lagom_libraries.cmake
@@ -0,0 +1,34 @@
+function(add_lagom_library list item)
+    list(FIND "${list}" "${item}" item_is_present)
+
+    if (item_is_present EQUAL -1)
+        set("${list}" "${${list}}" "${item}" PARENT_SCOPE)
+     endif()
+endfunction()
+
+function(get_linked_lagom_libraries_impl target output)
+    if (NOT TARGET "${target}")
+        return()
+    endif()
+
+    get_target_property(target_type "${target}" TYPE)
+
+    if ("${target_type}" STREQUAL "SHARED_LIBRARY")
+        add_lagom_library("${output}" "${target}")
+    elseif ("${target_type}" STREQUAL "INTERFACE_LIBRARY")
+        return()
+    endif()
+
+    get_target_property(target_libraries "${target}" LINK_LIBRARIES)
+
+    foreach(target_library IN LISTS target_libraries)
+        get_linked_lagom_libraries_impl("${target_library}" "${output}")
+    endforeach()
+
+    set("${output}" "${${output}}" PARENT_SCOPE)
+endfunction()
+
+function(get_linked_lagom_libraries target output)
+    get_linked_lagom_libraries_impl(${target} ${output})
+    set("${output}" "${${output}}" PARENT_SCOPE)
+endfunction()