From c7f388e723b85b48a1d0d462a8f2f7d962314421 Mon Sep 17 00:00:00 2001
From: Alexander Smorkalov <alexander.smorkalov@itseez.com>
Date: Tue, 10 May 2016 14:25:25 +0200
Subject: [PATCH] CPack/Deb generation of postinst and postrm ldconfig files

DEBIAN/postinst and DEBAIN/postrm files generation if
the package installs libraries in ldconfig controlled
location (/lib/, /usr/lib/)
---
 Modules/CPackDeb.cmake               | 29 ++++++++++++++
 Source/CPack/cmCPackDebGenerator.cxx | 56 ++++++++++++++++++++++++++++
 2 files changed, 85 insertions(+)

diff --git a/Modules/CPackDeb.cmake b/Modules/CPackDeb.cmake
index 748bf0637..d38751fcb 100644
--- a/Modules/CPackDeb.cmake
+++ b/Modules/CPackDeb.cmake
@@ -810,6 +810,33 @@ function(cpack_deb_prepare_package_vars)
     endif()
   endif()
 
+  # add ldconfig call in default postrm and postint
+  set(CPACK_ADD_LDCONFIG_CALL 0)
+  foreach(_FILE ${CPACK_DEB_SHARED_OBJECT_FILES})
+    get_filename_component(_DIR ${_FILE} DIRECTORY)
+    # all files in CPACK_DEB_SHARED_OBJECT_FILES have dot at the beginning
+    if(_DIR STREQUAL "./lib" OR _DIR STREQUAL "./usr/lib")
+      set(CPACK_ADD_LDCONFIG_CALL 1)
+    endif()
+  endforeach()
+
+  if(CPACK_ADD_LDCONFIG_CALL)
+    set(CPACK_DEBIAN_GENERATE_POSTINST 1)
+    set(CPACK_DEBIAN_GENERATE_POSTRM 1)
+    foreach(f ${PACKAGE_CONTROL_EXTRA})
+      get_filename_component(n "${f}" NAME)
+      if("${n}" STREQUAL "postinst")
+        set(CPACK_DEBIAN_GENERATE_POSTINST 0)
+      endif()
+      if("${n}" STREQUAL "postrm")
+        set(CPACK_DEBIAN_GENERATE_POSTRM 0)
+      endif()
+    endforeach()
+  else()
+    set(CPACK_DEBIAN_GENERATE_POSTINST 0)
+    set(CPACK_DEBIAN_GENERATE_POSTRM 0)
+  endif()
+
   # Print out some debug information if we were asked for that
   if(CPACK_DEBIAN_PACKAGE_DEBUG)
      message("CPackDeb:Debug: CPACK_TOPLEVEL_DIRECTORY          = '${CPACK_TOPLEVEL_DIRECTORY}'")
@@ -863,6 +890,8 @@ function(cpack_deb_prepare_package_vars)
       "${CPACK_DEBIAN_PACKAGE_CONTROL_STRICT_PERMISSION}" PARENT_SCOPE)
   set(GEN_CPACK_DEBIAN_PACKAGE_SOURCE
      "${CPACK_DEBIAN_PACKAGE_SOURCE}" PARENT_SCOPE)
+  set(GEN_CPACK_DEBIAN_GENERATE_POSTINST "${CPACK_DEBIAN_GENERATE_POSTINST}" PARENT_SCOPE)
+  set(GEN_CPACK_DEBIAN_GENERATE_POSTRM "${CPACK_DEBIAN_GENERATE_POSTRM}" PARENT_SCOPE)
   set(GEN_WDIR "${WDIR}" PARENT_SCOPE)
 endfunction()
 
diff --git a/Source/CPack/cmCPackDebGenerator.cxx b/Source/CPack/cmCPackDebGenerator.cxx
index 839115e9b..a09a7cba2 100644
--- a/Source/CPack/cmCPackDebGenerator.cxx
+++ b/Source/CPack/cmCPackDebGenerator.cxx
@@ -416,6 +416,29 @@ int cmCPackDebGenerator::createDeb()
     out << std::endl;
     }
 
+  const std::string postinst = strGenWDIR + "/postinst";
+  const std::string postrm = strGenWDIR + "/postrm";
+  if(this->IsOn("GEN_CPACK_DEBIAN_GENERATE_POSTINST"))
+    {
+    cmGeneratedFileStream out(postinst.c_str());
+     out <<
+       "#!/bin/sh\n\n"
+       "set -e\n\n"
+       "if [ \"$1\" = \"configure\" ]; then\n"
+       "\tldconfig\n"
+       "fi\n";
+    }
+  if(this->IsOn("GEN_CPACK_DEBIAN_GENERATE_POSTRM"))
+    {
+    cmGeneratedFileStream out(postrm.c_str());
+    out <<
+      "#!/bin/sh\n\n"
+      "set -e\n\n"
+      "if [ \"$1\" = \"remove\" ]; then\n"
+      "\tldconfig\n"
+      "fi\n";
+    }
+
   cmArchiveWrite::Compress tar_compression_type = cmArchiveWrite::CompressGZip;
   const char* debian_compression_type =
       this->GetOption("GEN_CPACK_DEBIAN_COMPRESSION_TYPE");
@@ -629,6 +652,39 @@ int cmCPackDebGenerator::createDeb()
         }
       }
 
+    // adds LDCONFIG related files
+    if(this->IsOn("GEN_CPACK_DEBIAN_GENERATE_POSTINST"))
+      {
+      control_tar.SetPermissions(permission755);
+      if(!control_tar.Add(postinst, strGenWDIR.length(), "."))
+        {
+          cmCPackLogger(cmCPackLog::LOG_ERROR,
+              "Error adding file to tar:" << std::endl
+              << "#top level directory: "
+                 << strGenWDIR << std::endl
+              << "#file: \"postinst\"" << std::endl
+              << "#error:" << control_tar.GetError() << std::endl);
+          return 0;
+        }
+      control_tar.SetPermissions(permission644);
+      }
+
+    if(this->IsOn("GEN_CPACK_DEBIAN_GENERATE_POSTRM"))
+      {
+      control_tar.SetPermissions(permission755);
+      if(!control_tar.Add(postrm, strGenWDIR.length(), "."))
+        {
+          cmCPackLogger(cmCPackLog::LOG_ERROR,
+              "Error adding file to tar:" << std::endl
+              << "#top level directory: "
+                 << strGenWDIR << std::endl
+              << "#file: \"postinst\"" << std::endl
+              << "#error:" << control_tar.GetError() << std::endl);
+          return 0;
+        }
+      control_tar.SetPermissions(permission644);
+      }
+
     // for the other files, we use
     // -either the original permission on the files
     // -either a permission strictly defined by the Debian policies