CMakePresets.json: Fix formatting of --list-presets=all

Only print an extra newline after a section if that section was
actually printed.

Source/cmCMakePresetsGraph.cxx

@@ -1067,6 +1067,16 @@ void cmCMakePresetsGraph::ClearPresets()
   this->Files.clear();
 }
 
+void cmCMakePresetsGraph::printPrecedingNewline(PrintPrecedingNewline* newline)
+{
+  if (newline) {
+    if (*newline == PrintPrecedingNewline::True) {
+      std::cout << std::endl;
+    }
+    *newline = PrintPrecedingNewline::True;
+  }
+}
+
 void cmCMakePresetsGraph::PrintPresets(
   const std::vector<const cmCMakePresetsGraph::Preset*>& presets)
 {
@@ -1095,13 +1105,16 @@ void cmCMakePresetsGraph::PrintPresets(
   }
 }
 
-void cmCMakePresetsGraph::PrintConfigurePresetList() const
+void cmCMakePresetsGraph::PrintConfigurePresetList(
+  PrintPrecedingNewline* newline) const
 {
-  PrintConfigurePresetList([](const ConfigurePreset&) { return true; });
+  PrintConfigurePresetList([](const ConfigurePreset&) { return true; },
+                           newline);
 }
 
 void cmCMakePresetsGraph::PrintConfigurePresetList(
-  const std::function<bool(const ConfigurePreset&)>& filter) const
+  const std::function<bool(const ConfigurePreset&)>& filter,
+  PrintPrecedingNewline* newline) const
 {
   std::vector<const cmCMakePresetsGraph::Preset*> presets;
   for (auto const& p : this->ConfigurePresetOrder) {
@@ -1114,12 +1127,14 @@ void cmCMakePresetsGraph::PrintConfigurePresetList(
   }
 
   if (!presets.empty()) {
+    printPrecedingNewline(newline);
     std::cout << "Available configure presets:\n\n";
     cmCMakePresetsGraph::PrintPresets(presets);
   }
 }
 
-void cmCMakePresetsGraph::PrintBuildPresetList() const
+void cmCMakePresetsGraph::PrintBuildPresetList(
+  PrintPrecedingNewline* newline) const
 {
   std::vector<const cmCMakePresetsGraph::Preset*> presets;
   for (auto const& p : this->BuildPresetOrder) {
@@ -1132,12 +1147,14 @@ void cmCMakePresetsGraph::PrintBuildPresetList() const
   }
 
   if (!presets.empty()) {
+    printPrecedingNewline(newline);
     std::cout << "Available build presets:\n\n";
     cmCMakePresetsGraph::PrintPresets(presets);
   }
 }
 
-void cmCMakePresetsGraph::PrintTestPresetList() const
+void cmCMakePresetsGraph::PrintTestPresetList(
+  PrintPrecedingNewline* newline) const
 {
   std::vector<const cmCMakePresetsGraph::Preset*> presets;
   for (auto const& p : this->TestPresetOrder) {
@@ -1150,6 +1167,7 @@ void cmCMakePresetsGraph::PrintTestPresetList() const
   }
 
   if (!presets.empty()) {
+    printPrecedingNewline(newline);
     std::cout << "Available test presets:\n\n";
     cmCMakePresetsGraph::PrintPresets(presets);
   }
@@ -1157,9 +1175,8 @@ void cmCMakePresetsGraph::PrintTestPresetList() const
 
 void cmCMakePresetsGraph::PrintAllPresets() const
 {
-  this->PrintConfigurePresetList();
-  std::cout << std::endl;
-  this->PrintBuildPresetList();
-  std::cout << std::endl;
-  this->PrintTestPresetList();
+  PrintPrecedingNewline newline = PrintPrecedingNewline::False;
+  this->PrintConfigurePresetList(&newline);
+  this->PrintBuildPresetList(&newline);
+  this->PrintTestPresetList(&newline);
 }

Source/cmCMakePresetsGraph.h

@@ -383,13 +383,22 @@ public:
     return "";
   }
 
+  enum class PrintPrecedingNewline
+  {
+    False,
+    True,
+  };
+  static void printPrecedingNewline(PrintPrecedingNewline* p);
+
   static void PrintPresets(
     const std::vector<const cmCMakePresetsGraph::Preset*>& presets);
-  void PrintConfigurePresetList() const;
   void PrintConfigurePresetList(
-    const std::function<bool(const ConfigurePreset&)>& filter) const;
-  void PrintBuildPresetList() const;
-  void PrintTestPresetList() const;
+    PrintPrecedingNewline* newline = nullptr) const;
+  void PrintConfigurePresetList(
+    const std::function<bool(const ConfigurePreset&)>& filter,
+    PrintPrecedingNewline* newline = nullptr) const;
+  void PrintBuildPresetList(PrintPrecedingNewline* newline = nullptr) const;
+  void PrintTestPresetList(PrintPrecedingNewline* newline = nullptr) const;
   void PrintAllPresets() const;
 
 private:

Tests/RunCMake/CMakePresets/ListAllPresetsNoBuild-stdout.txt

@@ -0,0 +1,8 @@
+^Not searching for unused variables given on the command line.
+Available configure presets:
+
+  "default"
+
+Available test presets:
+
+  "default"$

Tests/RunCMake/CMakePresets/ListAllPresetsNoBuild.json.in

@@ -0,0 +1,14 @@
+{
+  "version": 3,
+  "configurePresets": [
+    {
+      "name": "default"
+    }
+  ],
+  "testPresets": [
+    {
+      "name": "default",
+      "configurePreset": "default"
+    }
+  ]
+}

Tests/RunCMake/CMakePresets/ListAllPresetsNoTest-stdout.txt

@@ -0,0 +1,8 @@
+^Not searching for unused variables given on the command line.
+Available configure presets:
+
+  "default"
+
+Available build presets:
+
+  "default"$

Tests/RunCMake/CMakePresets/ListAllPresetsNoTest.json.in

@@ -0,0 +1,14 @@
+{
+  "version": 3,
+  "configurePresets": [
+    {
+      "name": "default"
+    }
+  ],
+  "buildPresets": [
+    {
+      "name": "default",
+      "configurePreset": "default"
+    }
+  ]
+}

Tests/RunCMake/CMakePresets/RunCMakeTest.cmake

@@ -304,6 +304,12 @@ unset(RunCMake_TEST_BINARY_DIR)
 run_cmake_presets(ListPresetsNoSuchPreset)
 run_cmake_presets(ListPresetsHidden)
 
+set(CMakePresets_FILE "${RunCMake_SOURCE_DIR}/ListAllPresetsNoBuild.json.in")
+run_cmake_presets(ListAllPresetsNoBuild --list-presets=all)
+
+set(CMakePresets_FILE "${RunCMake_SOURCE_DIR}/ListAllPresetsNoTest.json.in")
+run_cmake_presets(ListAllPresetsNoTest --list-presets=all)
+
 # Test warning and error flags
 set(CMakePresets_FILE "${RunCMake_SOURCE_DIR}/Warnings.json.in")
 set(CMakePresets_WARN_UNUSED_CLI 1)