CPackRPM: add scriplets tags only if scripts exist

Scriplet tags should not be added to generated
spec files if scripts weren't provided as those
tags are otherwise present in generated rpm file
even if the script wasn't provided thereby
generating unneeded dependency on shell.

Fixes: #21345

7 files changed, 153 insertions, 106 deletions

diff --git a/Modules/Internal/CPack/CPackRPM.cmake b/Modules/Internal/CPack/CPackRPM.cmake
index faaff7b..bece2dd 100644
--- a/Modules/Internal/CPack/CPackRPM.cmake
+++ b/Modules/Internal/CPack/CPackRPM.cmake
@@ -6,6 +6,56 @@
 cmake_policy(PUSH)
 cmake_policy(SET CMP0057 NEW) # if IN_LIST
 
+function(set_spec_script_if_enabled TYPE PACKAGE_NAME VAR)
+  if(NOT "${VAR}" STREQUAL "" AND NOT "${VAR}" STREQUAL "\n")
+    if(PACKAGE_NAME)
+      set(PACKAGE_NAME " -n ${PACKAGE_NAME}")
+    endif()
+    set(${TYPE}_
+      "%${TYPE}${PACKAGE_NAME}\n"
+      "${VAR}\n" PARENT_SCOPE)
+  else()
+    set(${TYPE} "" PARENT_SCOPE)
+  endif()
+endfunction()
+
+macro(set_spec_scripts PACKAGE_NAME)
+  # we should only set scripts that were provided
+  # as script announcement without content inside
+  # spec file will generate unneeded dependency
+  # on shell
+
+  set_spec_script_if_enabled(
+    "post"
+    "${PACKAGE_NAME}"
+    "${RPM_SYMLINK_POSTINSTALL}\n${CPACK_RPM_SPEC_POSTINSTALL}")
+
+  set_spec_script_if_enabled(
+    "posttrans"
+    "${PACKAGE_NAME}"
+    "${CPACK_RPM_SPEC_POSTTRANS}")
+
+  set_spec_script_if_enabled(
+    "postun"
+    "${PACKAGE_NAME}"
+    "${CPACK_RPM_SPEC_POSTUNINSTALL}")
+
+  set_spec_script_if_enabled(
+    "pre"
+    "${PACKAGE_NAME}"
+    "${CPACK_RPM_SPEC_PREINSTALL}")
+
+  set_spec_script_if_enabled(
+    "pretrans"
+    "${PACKAGE_NAME}"
+    "${CPACK_RPM_SPEC_PRETRANS}")
+
+  set_spec_script_if_enabled(
+    "preun"
+    "${PACKAGE_NAME}"
+    "${CPACK_RPM_SPEC_PREUNINSTALL}")
+endmacro()
+
 function(get_file_permissions FILE RETURN_VAR)
   execute_process(COMMAND ls -l ${FILE}
           OUTPUT_VARIABLE permissions_
@@ -1613,6 +1663,9 @@ Vendor:         \@CPACK_RPM_PACKAGE_VENDOR\@
     )
 
   elseif(GENERATE_SPEC_PARTS) # binary rpm with single debuginfo package
+
+    set_spec_scripts("${CPACK_RPM_PACKAGE_NAME}")
+
     file(WRITE ${CPACK_RPM_BINARY_SPECFILE}.in
         "# -*- rpm-spec -*-
 %package -n \@CPACK_RPM_PACKAGE_NAME\@
@@ -1643,24 +1696,12 @@ Vendor:         \@CPACK_RPM_PACKAGE_VENDOR\@
 %description -n \@CPACK_RPM_PACKAGE_NAME\@
 \@CPACK_RPM_PACKAGE_DESCRIPTION\@
 
-%post -n \@CPACK_RPM_PACKAGE_NAME\@
-\@RPM_SYMLINK_POSTINSTALL\@
-\@CPACK_RPM_SPEC_POSTINSTALL\@
-
-%posttrans -n \@CPACK_RPM_PACKAGE_NAME\@
-\@CPACK_RPM_SPEC_POSTTRANS\@
-
-%postun -n \@CPACK_RPM_PACKAGE_NAME\@
-\@CPACK_RPM_SPEC_POSTUNINSTALL\@
-
-%pre -n \@CPACK_RPM_PACKAGE_NAME\@
-\@CPACK_RPM_SPEC_PREINSTALL\@
-
-%pretrans -n \@CPACK_RPM_PACKAGE_NAME\@
-\@CPACK_RPM_SPEC_PRETRANS\@
-
-%preun -n \@CPACK_RPM_PACKAGE_NAME\@
-\@CPACK_RPM_SPEC_PREUNINSTALL\@
+\@post_\@
+\@posttrans_\@
+\@postun_\@
+\@pre_\@
+\@pretrans_\@
+\@preun_\@
 
 %files -n \@CPACK_RPM_PACKAGE_NAME\@
 %defattr(\@TMP_DEFAULT_FILE_PERMISSIONS\@,\@TMP_DEFAULT_USER\@,\@TMP_DEFAULT_GROUP\@,\@TMP_DEFAULT_DIR_PERMISSIONS\@)
@@ -1687,6 +1728,8 @@ Vendor:         \@CPACK_RPM_PACKAGE_VENDOR\@
     set(RPMBUILD_FLAGS "-bb")
     if(CPACK_RPM_GENERATE_USER_BINARY_SPECFILE_TEMPLATE OR NOT CPACK_RPM_USER_BINARY_SPECFILE)
 
+      set_spec_scripts("")
+
       file(WRITE ${CPACK_RPM_BINARY_SPECFILE}.in
         "# Restore old style debuginfo creation for rpm >= 4.14.
 %undefine _debugsource_packages
@@ -1750,24 +1793,12 @@ mv %_topdir/tmpBBroot $RPM_BUILD_ROOT
 
 %clean
 
-%post
-\@RPM_SYMLINK_POSTINSTALL\@
-\@CPACK_RPM_SPEC_POSTINSTALL\@
-
-%posttrans
-\@CPACK_RPM_SPEC_POSTTRANS\@
-
-%postun
-\@CPACK_RPM_SPEC_POSTUNINSTALL\@
-
-%pre
-\@CPACK_RPM_SPEC_PREINSTALL\@
-
-%pretrans
-\@CPACK_RPM_SPEC_PRETRANS\@
-
-%preun
-\@CPACK_RPM_SPEC_PREUNINSTALL\@
+\@post_\@
+\@posttrans_\@
+\@postun_\@
+\@pre_\@
+\@pretrans_\@
+\@preun_\@
 
 %files
 %defattr(\@TMP_DEFAULT_FILE_PERMISSIONS\@,\@TMP_DEFAULT_USER\@,\@TMP_DEFAULT_GROUP\@,\@TMP_DEFAULT_DIR_PERMISSIONS\@)
diff --git a/Tests/RunCMake/CPack/RunCMakeTest.cmake b/Tests/RunCMake/CPack/RunCMakeTest.cmake
index 48b9c1d..a3c72a1 100644
--- a/Tests/RunCMake/CPack/RunCMakeTest.cmake
+++ b/Tests/RunCMake/CPack/RunCMakeTest.cmake
@@ -16,7 +16,7 @@ run_cpack_test(VERSION "RPM.VERSION;DEB.VERSION" false "MONOLITHIC;COMPONENT")
 run_cpack_test(EXTRA "DEB.EXTRA" false "COMPONENT")
 run_cpack_test_subtests(GENERATE_SHLIBS "soversion_not_zero;soversion_zero" "DEB.GENERATE_SHLIBS" true "COMPONENT")
 run_cpack_test(GENERATE_SHLIBS_LDCONFIG "DEB.GENERATE_SHLIBS_LDCONFIG" true "COMPONENT")
-run_cpack_test_subtests(INSTALL_SCRIPTS "default;single_debug_info" "RPM.INSTALL_SCRIPTS" false "COMPONENT")
+run_cpack_test_subtests(INSTALL_SCRIPTS "default;single_debug_info;no_scripts;no_scripts_single_debug_info" "RPM.INSTALL_SCRIPTS" false "COMPONENT")
 run_cpack_test(LONG_FILENAMES "DEB.LONG_FILENAMES" false "MONOLITHIC")
 run_cpack_test_subtests(MAIN_COMPONENT "invalid;found" "RPM.MAIN_COMPONENT" false "COMPONENT")
 run_cpack_test(MINIMAL "RPM.MINIMAL;DEB.MINIMAL;7Z;TBZ2;TGZ;TXZ;TZ;ZIP;STGZ;External" false "MONOLITHIC;COMPONENT")
diff --git a/Tests/RunCMake/CPack/tests/INSTALL_SCRIPTS/ExpectedFiles.cmake b/Tests/RunCMake/CPack/tests/INSTALL_SCRIPTS/ExpectedFiles.cmake
index 29e36a3..5a87c44 100644
--- a/Tests/RunCMake/CPack/tests/INSTALL_SCRIPTS/ExpectedFiles.cmake
+++ b/Tests/RunCMake/CPack/tests/INSTALL_SCRIPTS/ExpectedFiles.cmake
@@ -1,4 +1,4 @@
-if(RunCMake_SUBTEST_SUFFIX STREQUAL "single_debug_info")
+if(RunCMake_SUBTEST_SUFFIX MATCHES ".*single_debug_info")
   set(EXPECTED_FILE_1 "install_scripts-0.1.1-1.*.rpm")
 else()
   set(EXPECTED_FILE_1_COMPONENT "foo")
diff --git a/Tests/RunCMake/CPack/tests/INSTALL_SCRIPTS/RPM-COMPONENT-no_scripts_single_debug_info-stderr.txt b/Tests/RunCMake/CPack/tests/INSTALL_SCRIPTS/RPM-COMPONENT-no_scripts_single_debug_info-stderr.txt
new file mode 100644
index 0000000..8d98f9d
--- /dev/null
+++ b/Tests/RunCMake/CPack/tests/INSTALL_SCRIPTS/RPM-COMPONENT-no_scripts_single_debug_info-stderr.txt
@@ -0,0 +1 @@
+.*
diff --git a/Tests/RunCMake/CPack/tests/INSTALL_SCRIPTS/RPM-Prerequirements.cmake b/Tests/RunCMake/CPack/tests/INSTALL_SCRIPTS/RPM-Prerequirements.cmake
index c5d20cc..90cfe44 100644
--- a/Tests/RunCMake/CPack/tests/INSTALL_SCRIPTS/RPM-Prerequirements.cmake
+++ b/Tests/RunCMake/CPack/tests/INSTALL_SCRIPTS/RPM-Prerequirements.cmake
@@ -1,5 +1,5 @@
 function(get_test_prerequirements found_var config_file)
-  if(SUBTEST_SUFFIX STREQUAL "single_debug_info")
+  if(SUBTEST_SUFFIX MATCHES ".*single_debug_info")
     include(${config_file})
 
     if(OBJDUMP_EXECUTABLE)
diff --git a/Tests/RunCMake/CPack/tests/INSTALL_SCRIPTS/VerifyResult.cmake b/Tests/RunCMake/CPack/tests/INSTALL_SCRIPTS/VerifyResult.cmake
index 1a1e983..0c42d90 100644
--- a/Tests/RunCMake/CPack/tests/INSTALL_SCRIPTS/VerifyResult.cmake
+++ b/Tests/RunCMake/CPack/tests/INSTALL_SCRIPTS/VerifyResult.cmake
@@ -7,23 +7,34 @@ function(checkScripts_ FILE COMPARE_LIST)
           ERROR_QUIET
           OUTPUT_STRIP_TRAILING_WHITESPACE)
 
-  string(REPLACE "\n" ";" FILE_SCRIPTS_LIST_ "${FILE_SCRIPTS_}")
+  if(COMPARE_LIST STREQUAL "")
+    if(NOT FILE_SCRIPTS_ STREQUAL "")
+      message(FATAL_ERROR "No scripts were expected in '${FILE}'; file info: '${FILE_SCRIPTS_}'")
+    endif()
+  else()
+    string(REPLACE "\n" ";" FILE_SCRIPTS_LIST_ "${FILE_SCRIPTS_}")
+
+    foreach(COMPARE_REGEX_ IN LISTS COMPARE_LIST)
+      unset(FOUND_)
 
-  foreach(COMPARE_REGEX_ IN LISTS COMPARE_LIST)
-    unset(FOUND_)
+      foreach(COMPARE_ IN LISTS FILE_SCRIPTS_LIST_)
+        if(COMPARE_ MATCHES "${COMPARE_REGEX_}")
+          set(FOUND_ true)
+          break()
+        endif()
+      endforeach()
 
-    foreach(COMPARE_ IN LISTS FILE_SCRIPTS_LIST_)
-      if(COMPARE_ MATCHES "${COMPARE_REGEX_}")
-        set(FOUND_ true)
-        break()
+      if(NOT FOUND_)
+        message(FATAL_ERROR "Missing scripts in '${FILE}'; file info: '${FILE_SCRIPTS_}'; missing: '${COMPARE_REGEX_}'")
       endif()
     endforeach()
-
-    if(NOT FOUND_)
-      message(FATAL_ERROR "Missing scripts in '${FILE}'; file info: '${FILE_SCRIPTS_}'; missing: '${COMPARE_REGEX_}'")
-    endif()
-  endforeach()
+  endif()
 endfunction()
 
-checkScripts_("${FOUND_FILE_1}" "echo \"pre install foo\";echo \"post install foo\";echo \"pre uninstall foo\";echo \"post uninstall foo\";echo \"pre trans foo\";echo \"post trans foo\"")
-checkScripts_("${FOUND_FILE_2}" "echo \"pre install\";echo \"post install\";echo \"pre uninstall\";echo \"post uninstall\";echo \"pre trans\";echo \"post trans\"")
+if(RunCMake_SUBTEST_SUFFIX MATCHES "no_scripts.*")
+  checkScripts_("${FOUND_FILE_1}" "")
+  checkScripts_("${FOUND_FILE_2}" "")
+else()
+  checkScripts_("${FOUND_FILE_1}" "echo \"pre install foo\";echo \"post install foo\";echo \"pre uninstall foo\";echo \"post uninstall foo\";echo \"pre trans foo\";echo \"post trans foo\"")
+  checkScripts_("${FOUND_FILE_2}" "echo \"pre install\";echo \"post install\";echo \"pre uninstall\";echo \"post uninstall\";echo \"pre trans\";echo \"post trans\"")
+endif()
diff --git a/Tests/RunCMake/CPack/tests/INSTALL_SCRIPTS/test.cmake b/Tests/RunCMake/CPack/tests/INSTALL_SCRIPTS/test.cmake
index 6877c57..ce5db0c 100644
--- a/Tests/RunCMake/CPack/tests/INSTALL_SCRIPTS/test.cmake
+++ b/Tests/RunCMake/CPack/tests/INSTALL_SCRIPTS/test.cmake
@@ -1,31 +1,5 @@
 if(GENERATOR_TYPE STREQUAL "RPM")
-  set(CPACK_RPM_PRE_INSTALL_SCRIPT_FILE
-    "${CMAKE_CURRENT_BINARY_DIR}/pre_install.sh")
-  set(CPACK_RPM_POST_INSTALL_SCRIPT_FILE
-    "${CMAKE_CURRENT_BINARY_DIR}/post_install.sh")
-  set(CPACK_RPM_PRE_UNINSTALL_SCRIPT_FILE
-    "${CMAKE_CURRENT_BINARY_DIR}/pre_uninstall.sh")
-  set(CPACK_RPM_POST_UNINSTALL_SCRIPT_FILE
-    "${CMAKE_CURRENT_BINARY_DIR}/post_uninstall.sh")
-  set(CPACK_RPM_PRE_TRANS_SCRIPT_FILE
-    "${CMAKE_CURRENT_BINARY_DIR}/pre_trans.sh")
-  set(CPACK_RPM_POST_TRANS_SCRIPT_FILE
-    "${CMAKE_CURRENT_BINARY_DIR}/post_trans.sh")
-
-  set(CPACK_RPM_foo_PRE_INSTALL_SCRIPT_FILE
-    "${CMAKE_CURRENT_BINARY_DIR}/pre_install_foo.sh")
-  set(CPACK_RPM_foo_POST_INSTALL_SCRIPT_FILE
-    "${CMAKE_CURRENT_BINARY_DIR}/post_install_foo.sh")
-  set(CPACK_RPM_foo_PRE_UNINSTALL_SCRIPT_FILE
-    "${CMAKE_CURRENT_BINARY_DIR}/pre_uninstall_foo.sh")
-  set(CPACK_RPM_foo_POST_UNINSTALL_SCRIPT_FILE
-    "${CMAKE_CURRENT_BINARY_DIR}/post_uninstall_foo.sh")
-  set(CPACK_RPM_foo_PRE_TRANS_SCRIPT_FILE
-    "${CMAKE_CURRENT_BINARY_DIR}/pre_trans_foo.sh")
-  set(CPACK_RPM_foo_POST_TRANS_SCRIPT_FILE
-    "${CMAKE_CURRENT_BINARY_DIR}/post_trans_foo.sh")
-
-  if(RunCMake_SUBTEST_SUFFIX STREQUAL "single_debug_info")
+  if(RunCMake_SUBTEST_SUFFIX MATCHES ".*single_debug_info")
     set(CPACK_RPM_MAIN_COMPONENT "foo")
     set(CPACK_RPM_DEBUGINFO_SINGLE_PACKAGE ON)
     set(CPACK_RPM_FOO_FILE_NAME "RPM-DEFAULT")
@@ -34,33 +8,63 @@ endif()
 
 set(CMAKE_BUILD_WITH_INSTALL_RPATH 1)
 
-# default
-file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/pre_install.sh"
-    "echo \"pre install\"\n")
-file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/post_install.sh"
-    "echo \"post install\"\n")
-file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/pre_uninstall.sh"
-    "echo \"pre uninstall\"\n")
-file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/post_uninstall.sh"
-    "echo \"post uninstall\"\n")
-file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/pre_trans.sh"
-    "echo \"pre trans\"\n")
-file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/post_trans.sh"
-    "echo \"post trans\"\n")
+if(NOT RunCMake_SUBTEST_SUFFIX MATCHES "no_scripts.*")
+  if(GENERATOR_TYPE STREQUAL "RPM")
+    set(CPACK_RPM_PRE_INSTALL_SCRIPT_FILE
+      "${CMAKE_CURRENT_BINARY_DIR}/pre_install.sh")
+    set(CPACK_RPM_POST_INSTALL_SCRIPT_FILE
+      "${CMAKE_CURRENT_BINARY_DIR}/post_install.sh")
+    set(CPACK_RPM_PRE_UNINSTALL_SCRIPT_FILE
+      "${CMAKE_CURRENT_BINARY_DIR}/pre_uninstall.sh")
+    set(CPACK_RPM_POST_UNINSTALL_SCRIPT_FILE
+      "${CMAKE_CURRENT_BINARY_DIR}/post_uninstall.sh")
+    set(CPACK_RPM_PRE_TRANS_SCRIPT_FILE
+      "${CMAKE_CURRENT_BINARY_DIR}/pre_trans.sh")
+    set(CPACK_RPM_POST_TRANS_SCRIPT_FILE
+      "${CMAKE_CURRENT_BINARY_DIR}/post_trans.sh")
+
+    set(CPACK_RPM_foo_PRE_INSTALL_SCRIPT_FILE
+      "${CMAKE_CURRENT_BINARY_DIR}/pre_install_foo.sh")
+    set(CPACK_RPM_foo_POST_INSTALL_SCRIPT_FILE
+      "${CMAKE_CURRENT_BINARY_DIR}/post_install_foo.sh")
+    set(CPACK_RPM_foo_PRE_UNINSTALL_SCRIPT_FILE
+      "${CMAKE_CURRENT_BINARY_DIR}/pre_uninstall_foo.sh")
+    set(CPACK_RPM_foo_POST_UNINSTALL_SCRIPT_FILE
+      "${CMAKE_CURRENT_BINARY_DIR}/post_uninstall_foo.sh")
+    set(CPACK_RPM_foo_PRE_TRANS_SCRIPT_FILE
+      "${CMAKE_CURRENT_BINARY_DIR}/pre_trans_foo.sh")
+    set(CPACK_RPM_foo_POST_TRANS_SCRIPT_FILE
+      "${CMAKE_CURRENT_BINARY_DIR}/post_trans_foo.sh")
+  endif()
+
+  # default
+  file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/pre_install.sh"
+      "echo \"pre install\"\n")
+  file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/post_install.sh"
+      "echo \"post install\"\n")
+  file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/pre_uninstall.sh"
+      "echo \"pre uninstall\"\n")
+  file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/post_uninstall.sh"
+      "echo \"post uninstall\"\n")
+  file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/pre_trans.sh"
+      "echo \"pre trans\"\n")
+  file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/post_trans.sh"
+      "echo \"post trans\"\n")
 
-# specific
-file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/pre_install_foo.sh"
-    "echo \"pre install foo\"\n")
-file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/post_install_foo.sh"
-    "echo \"post install foo\"\n")
-file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/pre_uninstall_foo.sh"
-    "echo \"pre uninstall foo\"\n")
-file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/post_uninstall_foo.sh"
-    "echo \"post uninstall foo\"\n")
-file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/pre_trans_foo.sh"
-    "echo \"pre trans foo\"\n")
-file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/post_trans_foo.sh"
-    "echo \"post trans foo\"\n")
+  # specific
+  file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/pre_install_foo.sh"
+      "echo \"pre install foo\"\n")
+  file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/post_install_foo.sh"
+      "echo \"post install foo\"\n")
+  file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/pre_uninstall_foo.sh"
+      "echo \"pre uninstall foo\"\n")
+  file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/post_uninstall_foo.sh"
+      "echo \"post uninstall foo\"\n")
+  file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/pre_trans_foo.sh"
+      "echo \"pre trans foo\"\n")
+  file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/post_trans_foo.sh"
+      "echo \"post trans foo\"\n")
+endif()
 
 install(FILES CMakeLists.txt DESTINATION foo COMPONENT foo)
 install(FILES CMakeLists.txt DESTINATION bar COMPONENT bar)