Add optional binary relocatability

CMakeLists.txt

@@ -49,6 +49,13 @@ if (BUILD_SDF)
   # Find tinyxml2.
   gz_find_package(TINYXML2 REQUIRED)
 
+  #################################################
+  # Find DL if doing relocatable installation
+  if (GZ_ENABLE_RELOCATABLE_INSTALL)
+    gz_find_package(DL REQUIRED)
+  endif()
+
+
   ################################################
   # Find urdfdom parser. Logic:
   #

include/sdf/InstallationDirectories.hh

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2024 Open Source Robotics Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#ifndef SDF_INSTALLATION_DIRECTORIES_HH_
+#define SDF_INSTALLATION_DIRECTORIES_HH_
+
+#include <string>
+
+#include <sdf/sdf_config.h>
+#include <sdf/system_util.hh>
+
+namespace sdf
+{
+  inline namespace SDF_VERSION_NAMESPACE {
+
+  /// \brief getInstallPrefix return the install prefix of the library
+  /// i.e. CMAKE_INSTALL_PREFIX unless the library has been moved
+  SDFORMAT_VISIBLE std::string getInstallPrefix();
+
+  /// \brief getSharePath return the share directory used by sdformat
+  SDFORMAT_VISIBLE std::string getSharePath();
+
+  }
+}
+
+#endif

include/sdf/config.hh.in

@@ -48,11 +48,11 @@
 #cmakedefine SDFORMAT_DISABLE_CONSOLE_LOGFILE 1
 
 #ifndef SDF_SHARE_PATH
-#define SDF_SHARE_PATH "${CMAKE_INSTALL_FULL_DATAROOTDIR}/"
+#define SDF_SHARE_PATH _Pragma ("GCC warning \"'SDF_SHARE_PATH' macro is deprecated, use sdf::getSharePath() function instead. \"") "${CMAKE_INSTALL_FULL_DATAROOTDIR}/"
 #endif
 
 #ifndef SDF_VERSION_PATH
-#define SDF_VERSION_PATH "${CMAKE_INSTALL_FULL_DATAROOTDIR}/sdformat${PROJECT_VERSION_MAJOR}/${PROJECT_VERSION}"
+#define SDF_VERSION_PATH _Pragma ("GCC warning \"'SDF_VERSION_PATH' macro is deprecated and should not be used. \"") "${CMAKE_INSTALL_FULL_DATAROOTDIR}/sdformat${PROJECT_VERSION_MAJOR}/${PROJECT_VERSION}"
 #endif
 
 #endif  // #ifndef SDF_CONFIG_HH_

src/CMakeLists.txt

@@ -23,6 +23,24 @@ gz_create_core_library(SOURCES ${sources}
   CXX_STANDARD 17
   LEGACY_PROJECT_PREFIX SDFormat
   )
+gz_add_get_install_prefix_impl(GET_INSTALL_PREFIX_FUNCTION sdf::getInstallPrefix
+  GET_INSTALL_PREFIX_HEADER sdf/InstallationDirectories.hh
+  OVERRIDE_INSTALL_PREFIX_ENV_VARIABLE SDF_INSTALL_PREFIX)
+
+# CMAKE_INSTALL_DATAROOTDIR may be an absolute path, let's make sure to use the
+# relative version
+if(IS_ABSOLUTE "${CMAKE_INSTALL_DATAROOTDIR}")
+  file(RELATIVE_PATH CMAKE_INSTALL_RELATIVE_DATAROOTDIR "${CMAKE_INSTALL_PREFIX}" "${CMAKE_INSTALL_DATAROOTDIR}")
+else()
+  set(CMAKE_INSTALL_RELATIVE_DATAROOTDIR "${CMAKE_INSTALL_DATAROOTDIR}")
+endif()
+
+set_property(
+  SOURCE InstallationDirectories.cc
+  PROPERTY COMPILE_DEFINITIONS
+  CMAKE_INSTALL_RELATIVE_DATAROOTDIR="${CMAKE_INSTALL_RELATIVE_DATAROOTDIR}"
+)
+
 
 target_link_libraries(${PROJECT_LIBRARY_TARGET_NAME}
   PUBLIC
@@ -91,6 +109,11 @@ if (BUILD_TESTING)
     -DGZ_SDFORMAT_STATIC_DEFINE
   )
 
+  if(WIN32)
+    target_link_libraries(${PROJECT_LIBRARY_TARGET_NAME}
+      PRIVATE shlwapi)
+  endif()
+
   gz_build_tests(
     TYPE UNIT
     SOURCES ${gtest_sources}
@@ -99,6 +122,8 @@ if (BUILD_TESTING)
       ${PROJECT_SOURCE_DIR}/test
     LIB_DEPS
       library_for_tests
+    ENVIRONMENT
+      SDF_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX}
   )
 
   if (TARGET UNIT_gz_TEST)

src/InstallationDirectories.cc

@@ -0,0 +1,151 @@
+/*
+ * Copyright (C) 2024 Open Source Robotics Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+*/
+
+#include <regex>
+
+#include <sdf/sdf_config.h>
+#include <sdf/InstallationDirectories.hh>
+
+#ifdef _WIN32
+#include <shlwapi.h>
+#endif
+
+namespace sdf
+{
+inline namespace SDF_VERSION_NAMESPACE {
+
+// We locally import the gz::common::joinPaths function
+// See https://github.com/gazebosim/gz-physics/pull/507#discussion_r1186919267
+// for more details
+
+// Function imported from
+// https://github.com/gazebosim/gz-common/blob/ignition-common4_4.6.2/src/FilesystemBoost.cc#L507
+#ifndef WIN32
+static const char preferred_separator = '/';
+#else  // Windows
+static const char preferred_separator = '\\';
+#endif
+const std::string separator(const std::string &_p)
+{
+  return _p + preferred_separator;
+}
+
+// Function imported from
+// https://github.com/gazebosim/gz-common/blob/ignition-common4_4.6.2/src/Filesystem.cc#L227
+std::string checkWindowsPath(const std::string _path)
+{
+  if (_path.empty())
+    return _path;
+
+  // Check if this is a http or https, if so change backslashes generated by
+  // jointPaths to '/'
+  if ((_path.size() > 7 && 0 == _path.compare(0, 7, "http://")) ||
+      (_path.size() > 8 && 0 == _path.compare(0, 8, "https://")))
+  {
+    return std::regex_replace(_path, std::regex(R"(\\)"), "/");
+  }
+
+  // This is a Windows path, convert all '/' into backslashes
+  std::string result = std::regex_replace(_path, std::regex(R"(/)"), "\\");
+  std::string drive_letters;
+
+  // only Windows contains absolute paths starting with drive letters
+  if (result.length() > 3 && 0 == result.compare(1, 2, ":\\"))
+  {
+    drive_letters = result.substr(0, 3);
+    result = result.substr(3);
+  }
+  result = drive_letters + std::regex_replace(
+    result, std::regex("[<>:\"|?*]"), "");
+  return result;
+}
+
+// Function imported from
+// https://github.com/gazebosim/gz-common/blob/ignition-common4_4.6.2/src/Filesystem.cc#L256
+std::string joinPaths(const std::string &_path1,
+                      const std::string &_path2)
+{
+
+  /// This function is used to avoid duplicated path separators at the
+  /// beginning/end of the string, and between the two paths being joined.
+  /// \param[in] _path This is the string to sanitize.
+  /// \param[in] _stripLeading True if the leading separator should be
+  /// removed.
+  auto sanitizeSlashes = [](const std::string &_path,
+                            bool _stripLeading = false)
+  {
+    // Shortcut
+    if (_path.empty())
+      return _path;
+
+    std::string result = _path;
+
+    // Use the appropriate character for each platform.
+#ifndef _WIN32
+    char replacement = '/';
+#else
+    char replacement = '\\';
+#endif
+
+    // Sanitize the start of the path.
+    size_t index = 0;
+    size_t leadingIndex = _stripLeading ? 0 : 1;
+    for (; index < result.length() && result[index] == replacement; ++index)
+    {
+    }
+    if (index > leadingIndex)
+      result.erase(leadingIndex, index-leadingIndex);
+
+    // Sanitize the end of the path.
+    index = result.length()-1;
+    for (; index <  result.length() && result[index] == replacement; --index)
+    {
+    }
+    index += 1;
+    if (index < result.length()-1)
+        result.erase(index+1);
+    return result;
+  };
+
+  std::string path;
+#ifndef _WIN32
+  path = sanitizeSlashes(sanitizeSlashes(separator(_path1)) +
+      sanitizeSlashes(_path2, true));
+#else  // _WIN32
+  std::string path1 = sanitizeSlashes(checkWindowsPath(_path1));
+  std::string path2 = sanitizeSlashes(checkWindowsPath(_path2), true);
+  std::vector<char> combined(path1.length() + path2.length() + 2);
+  if (::PathCombineA(combined.data(), path1.c_str(), path2.c_str()) != NULL)
+  {
+    path = sanitizeSlashes(checkWindowsPath(std::string(combined.data())));
+  }
+  else
+  {
+    path = sanitizeSlashes(checkWindowsPath(separator(path1) + path2));
+  }
+#endif  // _WIN32
+  return path;
+}
+
+std::string getSharePath()
+{
+  return sdf::joinPaths(
+      getInstallPrefix(), CMAKE_INSTALL_RELATIVE_DATAROOTDIR);
+}
+
+}
+}

src/SDF.cc

@@ -29,6 +29,7 @@
 #include "sdf/Console.hh"
 #include "sdf/Error.hh"
 #include "sdf/Filesystem.hh"
+#include "sdf/InstallationDirectories.hh"
 #include "sdf/SDFImpl.hh"
 #include "SDFImplPrivate.hh"
 #include "sdf/sdf_config.h"
@@ -47,11 +48,15 @@ std::string SDF::version = SDF_VERSION;  // NOLINT(runtime/string)
 
 std::string sdfSharePath()
 {
-#ifdef SDF_SHARE_PATH
-  if (std::string(SDF_SHARE_PATH) != "/")
-    return SDF_SHARE_PATH;
-#endif
-  return "";
+  std::string sharePath = sdf::getSharePath();
+  if (sharePath != "/")
+  {
+    return sharePath;
+  }
+  else
+  {
+    return "";
+  }
 }
 
 /////////////////////////////////////////////////

test/integration/CMakeLists.txt

@@ -77,6 +77,7 @@ endif()
 gz_build_tests(TYPE ${TEST_TYPE}
   SOURCES ${tests}
   INCLUDE_DIRS ${PROJECT_SOURCE_DIR}/test
+  ENVIRONMENT SDF_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX}
 )
 
 

test/performance/CMakeLists.txt

@@ -4,4 +4,7 @@ set(tests
   parser_urdf.cc
 )
 
-gz_build_tests(TYPE ${TEST_TYPE} SOURCES ${tests} INCLUDE_DIRS ${PROJECT_SOURCE_DIR}/test)
+gz_build_tests(TYPE ${TEST_TYPE}
+               SOURCES ${tests}
+               INCLUDE_DIRS ${PROJECT_SOURCE_DIR}/test
+               ENVIRONMENT SDF_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX})