ctest_update: Support custom Git update command

Define CTest configuration variable CTEST_GIT_UPDATE_CUSTOM to set a
custom command line for updating Git-managed source trees.

Modules/DartConfiguration.tcl.in

@@ -49,6 +49,7 @@ SVNUpdateOptions: @SVN_UPDATE_OPTIONS@
 # Git options
 GITCommand: @GITCOMMAND@
 GITUpdateOptions: @GIT_UPDATE_OPTIONS@
+GITUpdateCustom: @CTEST_GIT_UPDATE_CUSTOM@
 
 # Generic update command
 UpdateCommand: @UPDATE_COMMAND@

Source/CTest/cmCTestGIT.cxx

@@ -85,7 +85,7 @@ void cmCTestGIT::NoteNewRevision()
 }
 
 //----------------------------------------------------------------------------
-bool cmCTestGIT::UpdateImpl()
+bool cmCTestGIT::UpdateByPull()
 {
   const char* git = this->CommandLineTool.c_str();
 
@@ -114,14 +114,51 @@ bool cmCTestGIT::UpdateImpl()
 
   OutputLogger out(this->Log, "pull-out> ");
   OutputLogger err(this->Log, "pull-err> ");
-  if(this->RunUpdateCommand(&git_pull[0], &out, &err))
+  return this->RunUpdateCommand(&git_pull[0], &out, &err);
+}
+
+//----------------------------------------------------------------------------
+bool cmCTestGIT::UpdateByCustom(std::string const& custom)
+{
+  std::vector<std::string> git_custom_command;
+  cmSystemTools::ExpandListArgument(custom, git_custom_command, true);
+  std::vector<char const*> git_custom;
+  for(std::vector<std::string>::const_iterator
+        i = git_custom_command.begin(); i != git_custom_command.end(); ++i)
     {
-    char const* git_submodule[] = {git, "submodule", "update", 0};
-    OutputLogger out2(this->Log, "submodule-out> ");
-    OutputLogger err2(this->Log, "submodule-err> ");
-    return this->RunChild(git_submodule, &out2, &err2);
+    git_custom.push_back(i->c_str());
     }
-  return false;
+  git_custom.push_back(0);
+
+  OutputLogger custom_out(this->Log, "custom-out> ");
+  OutputLogger custom_err(this->Log, "custom-err> ");
+  return this->RunUpdateCommand(&git_custom[0], &custom_out, &custom_err);
+}
+
+//----------------------------------------------------------------------------
+bool cmCTestGIT::UpdateInternal()
+{
+  std::string custom = this->CTest->GetCTestConfiguration("GITUpdateCustom");
+  if(!custom.empty())
+    {
+    return this->UpdateByCustom(custom);
+    }
+  return this->UpdateByPull();
+}
+
+//----------------------------------------------------------------------------
+bool cmCTestGIT::UpdateImpl()
+{
+  if(!this->UpdateInternal())
+    {
+    return false;
+    }
+
+  const char* git = this->CommandLineTool.c_str();
+  char const* git_submodule[] = {git, "submodule", "update", 0};
+  OutputLogger submodule_out(this->Log, "submodule-out> ");
+  OutputLogger submodule_err(this->Log, "submodule-err> ");
+  return this->RunChild(git_submodule, &submodule_out, &submodule_err);
 }
 
 //----------------------------------------------------------------------------

Source/CTest/cmCTestGIT.h

@@ -32,6 +32,10 @@ private:
   virtual void NoteNewRevision();
   virtual bool UpdateImpl();
 
+  bool UpdateByPull();
+  bool UpdateByCustom(std::string const& custom);
+  bool UpdateInternal();
+
   void LoadRevisions();
   void LoadModifications();
 

Source/CTest/cmCTestUpdateCommand.cxx

@@ -51,6 +51,8 @@ cmCTestGenericHandler* cmCTestUpdateCommand::InitializeHandler()
     "GITCommand", "CTEST_GIT_COMMAND");
   this->CTest->SetCTestConfigurationFromCMakeVariable(this->Makefile,
     "GITUpdateOptions", "CTEST_GIT_UPDATE_OPTIONS");
+  this->CTest->SetCTestConfigurationFromCMakeVariable(this->Makefile,
+    "GITUpdateCustom", "CTEST_GIT_UPDATE_CUSTOM");
   this->CTest->SetCTestConfigurationFromCMakeVariable(this->Makefile,
     "HGCommand", "CTEST_HG_COMMAND");
   this->CTest->SetCTestConfigurationFromCMakeVariable(this->Makefile,

Tests/CTestUpdateGIT.cmake.in

@@ -192,15 +192,18 @@ run_child(
 
 #-----------------------------------------------------------------------------
 # Go back to before the changes so we can test updating.
-message("Backing up to revision 1...")
-run_child(
-  WORKING_DIRECTORY ${TOP}/user-source
-  COMMAND ${GIT} reset --hard master~2
-  )
-run_child(
-  WORKING_DIRECTORY ${TOP}/user-source
-  COMMAND ${GIT} submodule update
-  )
+macro(rewind_source src_dir)
+  message("Backing up to revision 1...")
+  run_child(
+    WORKING_DIRECTORY ${TOP}/${src_dir}
+    COMMAND ${GIT} reset --hard origin/master~2
+    )
+  run_child(
+    WORKING_DIRECTORY ${TOP}/${src_dir}
+    COMMAND ${GIT} submodule update
+    )
+endmacro(rewind_source)
+rewind_source(user-source)
 
 # Make sure pull does not try to rebase (which does not work with
 # modified files) even if ~/.gitconfig sets "branch.master.rebase".
@@ -226,6 +229,22 @@ UpdateCommand: ${GIT}
 # Run the dashboard command line interface.
 run_dashboard_command_line(user-binary)
 
+rewind_source(user-source)
+modify_content(user-source)
+
+message("Running CTest Dashboard Command Line (custom update)...")
+
+# Create the user build tree.
+create_build_tree(user-source user-binary-custom)
+file(APPEND ${TOP}/user-binary-custom/CTestConfiguration.ini
+  "# GIT command configuration
+UpdateCommand: ${GIT}
+GITUpdateCustom: ${GIT};pull;origin;master
+")
+
+# Run the dashboard command line interface.
+run_dashboard_command_line(user-binary-custom)
+
 #-----------------------------------------------------------------------------
 # Test initial checkout and update with a dashboard script.
 message("Running CTest Dashboard Script...")
@@ -254,3 +273,19 @@ execute_process(
 
 # Run the dashboard script with CTest.
 run_dashboard_script(dash-binary)
+
+rewind_source(dash-source)
+
+#-----------------------------------------------------------------------------
+# Test custom update with a dashboard script.
+message("Running CTest Dashboard Script (custom update)...")
+
+create_dashboard_script(dash-binary-custom
+  "# git command configuration
+set(CTEST_GIT_COMMAND \"${GIT}\")
+set(CTEST_GIT_UPDATE_OPTIONS)
+set(CTEST_GIT_UPDATE_CUSTOM \${CTEST_GIT_COMMAND} pull origin master)
+")
+
+# Run the dashboard script with CTest.
+run_dashboard_script(dash-binary-custom)