CPack: Add missing check for CPACK_INSTALL_SCRIPT variable

Also add a test case that uses CPACK_INSTALL_SCRIPT.

Co-Author: Domen Vrankar <[email protected]>
Fixes: #15005

Source/CPack/cpack.cxx

@@ -350,13 +350,14 @@ int main(int argc, char const* const* argv)
           }
 
           if (!mf->GetDefinition("CPACK_INSTALL_COMMANDS") &&
+              !mf->GetDefinition("CPACK_INSTALL_SCRIPT") &&
               !mf->GetDefinition("CPACK_INSTALLED_DIRECTORIES") &&
               !mf->GetDefinition("CPACK_INSTALL_CMAKE_PROJECTS")) {
             cmCPack_Log(
               &log, cmCPackLog::LOG_ERROR,
               "Please specify build tree of the project that uses CMake "
               "using CPACK_INSTALL_CMAKE_PROJECTS, specify "
-              "CPACK_INSTALL_COMMANDS, or specify "
+              "CPACK_INSTALL_COMMANDS, CPACK_INSTALL_SCRIPT, or "
               "CPACK_INSTALLED_DIRECTORIES."
                 << std::endl);
             parsed = 0;

Tests/RunCMake/CPack/RunCMakeTest.cmake

@@ -27,3 +27,4 @@ run_cpack_test(SUGGESTS "RPM" false "MONOLITHIC")
 run_cpack_test(SYMLINKS "RPM;TGZ" false "MONOLITHIC;COMPONENT")
 run_cpack_test(USER_FILELIST "RPM" false "MONOLITHIC")
 run_cpack_test(MD5SUMS "DEB" false "MONOLITHIC;COMPONENT")
+run_cpack_test(CPACK_INSTALL_SCRIPT "ZIP" false "MONOLITHIC")

Tests/RunCMake/CPack/tests/CPACK_INSTALL_SCRIPT/ExpectedFiles.cmake

@@ -0,0 +1,3 @@
+set(EXPECTED_FILES_COUNT "1")
+
+set(EXPECTED_FILE_CONTENT_1_LIST "/usr;/usr/foo;/usr/foo/abc.txt")

Tests/RunCMake/CPack/tests/CPACK_INSTALL_SCRIPT/test.cmake

@@ -0,0 +1,11 @@
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/abc.txt" "test content")
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/user-script.cmake"
+  "file(INSTALL DESTINATION \"\${CMAKE_INSTALL_PREFIX}/foo\"
+    TYPE FILE FILES \"${CMAKE_CURRENT_BINARY_DIR}/abc.txt\")")
+set(CPACK_INSTALL_SCRIPT "${CMAKE_CURRENT_BINARY_DIR}/user-script.cmake")
+
+function(run_after_include_cpack)
+  file(READ "${CPACK_OUTPUT_CONFIG_FILE}" conf_file_)
+  string(REGEX REPLACE "SET\\(CPACK_INSTALL_CMAKE_PROJECTS [^)]*\\)" "" conf_file_ "${conf_file_}")
+  file(WRITE "${CPACK_OUTPUT_CONFIG_FILE}" "${conf_file_}")
+endfunction()