CPack/RPM: handle extra slashes

Extra slashes in some locations can
cause errors during package generation
and can also be present in generated
rpm packages causing issues for the
package user.

Closes #16619

Modules/CPackRPM.cmake

@@ -958,10 +958,20 @@ function(cpack_rpm_prepare_relocation_paths)
   foreach(RELOCATION_PATH ${RPM_RELOCATION_PATHS})
     if(IS_ABSOLUTE "${RELOCATION_PATH}")
       set(PREPARED_RELOCATION_PATH "${RELOCATION_PATH}")
+    elseif(PATH_PREFIX STREQUAL "/")
+      # don't prefix path with a second slash as "//" is treated as network path
+      # by get_filename_component() so it remains in path even inside rpm
+      # package where it may cause problems with relocation
+      set(PREPARED_RELOCATION_PATH "/${RELOCATION_PATH}")
     else()
       set(PREPARED_RELOCATION_PATH "${PATH_PREFIX}/${RELOCATION_PATH}")
     endif()
 
+    # handle cases where path contains extra slashes (e.g. /a//b/ instead of
+    # /a/b)
+    get_filename_component(PREPARED_RELOCATION_PATH
+      "${PREPARED_RELOCATION_PATH}" ABSOLUTE)
+
     if(EXISTS "${WDIR}/${PREPARED_RELOCATION_PATH}")
       string(APPEND TMP_RPM_PREFIXES "Prefix: ${PREPARED_RELOCATION_PATH}\n")
       list(APPEND RPM_USED_PACKAGE_PREFIXES "${PREPARED_RELOCATION_PATH}")
@@ -2130,6 +2140,11 @@ function(cpack_rpm_generate_package)
       set(CPACK_RPM_BUILD_SOURCE_DIRS_PREFIX "/usr/src/debug/${CPACK_PACKAGE_FILE_NAME}${CPACK_RPM_PACKAGE_COMPONENT_PART_PATH}")
     endif()
 
+    # handle cases where path contains extra slashes (e.g. /a//b/ instead of
+    # /a/b)
+    get_filename_component(CPACK_RPM_BUILD_SOURCE_DIRS_PREFIX
+      "${CPACK_RPM_BUILD_SOURCE_DIRS_PREFIX}" ABSOLUTE)
+
     if(CPACK_RPM_DEBUGINFO_SINGLE_PACKAGE AND GENERATE_SPEC_PARTS)
       file(WRITE "${CPACK_RPM_ROOTDIR}/SPECS/${CPACK_RPM_PACKAGE_COMPONENT}.files"
         "${CPACK_RPM_INSTALL_FILES}")

Tests/RunCMake/CPack/RunCMakeTest.cmake

@@ -21,6 +21,7 @@ run_cpack_test_subtests(PACKAGE_CHECKSUM "invalid;MD5;SHA1;SHA224;SHA256;SHA384;
 run_cpack_test(PARTIALLY_RELOCATABLE_WARNING "RPM" false "COMPONENT")
 run_cpack_test(PER_COMPONENT_FIELDS "RPM;DEB" false "COMPONENT")
 run_cpack_test_subtests(SINGLE_DEBUGINFO "no_main_component;one_component;one_component_main;no_debuginfo;one_component_no_debuginfo;no_components;valid" "RPM" true "CUSTOM")
+run_cpack_test(EXTRA_SLASH_IN_PATH "RPM" true "COMPONENT")
 run_cpack_source_test(SOURCE_PACKAGE "RPM")
 run_cpack_test(SUGGESTS "RPM" false "MONOLITHIC")
 run_cpack_test(USER_FILELIST "RPM" false "MONOLITHIC")

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

@@ -0,0 +1,16 @@
+set(whitespaces_ "[\t\n\r ]*")
+
+set(EXPECTED_FILES_COUNT "5")
+set(EXPECTED_FILES_NAME_GENERATOR_SPECIFIC_FORMAT TRUE)
+
+set(EXPECTED_FILE_1_COMPONENT "applications")
+set(EXPECTED_FILE_CONTENT_1_LIST "/foo;/foo/test_prog")
+set(EXPECTED_FILE_2 "extra_slash_in_path*-headers.rpm")
+set(EXPECTED_FILE_CONTENT_2_LIST "/bar;/bar/CMakeLists.txt")
+set(EXPECTED_FILE_3 "extra_slash_in_path*-libs.rpm")
+set(EXPECTED_FILE_CONTENT_3_LIST "/bas;/bas/libtest_lib.so")
+
+set(EXPECTED_FILE_4_COMPONENT "applications-debuginfo")
+set(EXPECTED_FILE_CONTENT_4 ".*/src${whitespaces_}/src/src_1${whitespaces_}/src/src_1/main.cpp.*")
+set(EXPECTED_FILE_5_COMPONENT "libs-debuginfo")
+set(EXPECTED_FILE_CONTENT_5 ".*/src${whitespaces_}/src/src_1${whitespaces_}/src/src_1/test_lib.cpp.*")

Tests/RunCMake/CPack/tests/EXTRA_SLASH_IN_PATH/VerifyResult.cmake

@@ -0,0 +1,7 @@
+# check that relocation path is /foo and not //foo
+getPackageInfo("${FOUND_FILE_1}" "FILE_INFO_")
+set(whitespaces_ "[\t\n\r ]*")
+if(NOT FILE_INFO_ MATCHES "Relocations${whitespaces_}:${whitespaces_}/${whitespaces_}/foo")
+  message(FATAL_ERROR "Unexpected relocation path in file '${FOUND_FILE_1}';"
+    " file info: '${FILE_INFO_}'")
+endif()

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

@@ -0,0 +1,37 @@
+set(CMAKE_BUILD_WITH_INSTALL_RPATH 1)
+
+# PGI compiler doesn't add build id to binaries by default
+if(CMAKE_CXX_COMPILER_ID STREQUAL "PGI")
+  string(APPEND CMAKE_EXE_LINKER_FLAGS "-Wl,--build-id")
+  string(APPEND CMAKE_SHARED_LINKER_FLAGS "-Wl,--build-id")
+endif()
+
+set(CMAKE_BUILD_TYPE Debug)
+
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/test_lib.hpp"
+    "int test_lib();\n")
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/test_lib.cpp"
+    "#include \"test_lib.hpp\"\nint test_lib() {return 0;}\n")
+add_library(test_lib SHARED "${CMAKE_CURRENT_BINARY_DIR}/test_lib.cpp")
+
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/main.cpp"
+    "#include \"test_lib.hpp\"\nint main() {return test_lib();}\n")
+add_executable(test_prog "${CMAKE_CURRENT_BINARY_DIR}/main.cpp")
+target_link_libraries(test_prog test_lib)
+
+install(TARGETS test_prog DESTINATION foo COMPONENT applications)
+install(FILES CMakeLists.txt DESTINATION bar COMPONENT headers)
+install(TARGETS test_lib DESTINATION bas COMPONENT libs)
+
+set(CPACK_RPM_APPLICATIONS_FILE_NAME "RPM-DEFAULT")
+set(CPACK_RPM_APPLICATIONS_DEBUGINFO_PACKAGE ON)
+set(CPACK_RPM_LIBS_DEBUGINFO_PACKAGE ON)
+
+# extra trailing slash at the end that should be removed
+set(CPACK_RPM_BUILD_SOURCE_DIRS_PREFIX "/src/")
+
+# combination should not cause //foo to apper as an relocation path
+# should be only /foo (extra slashes cause path comparisons to fail)
+set(CPACK_PACKAGING_INSTALL_PREFIX "/")
+# extra trailing slash at the end that should be removed
+set(CPACK_RPM_RELOCATION_PATHS "foo/")