Fix CMake 3.12 compatibility by adding required install destinations

Co-authored-by: ArthurSonzogni <4759106+ArthurSonzogni@users.noreply.github.com>

.github/copilot-instructions.md

@@ -1,212 +0,0 @@
-# FTXUI - Functional Terminal (X) User Interface
-
-FTXUI is a cross-platform C++ library for terminal-based user interfaces with a functional programming approach, inspired by React.
-
-**ALWAYS reference these instructions first and fallback to search or bash commands only when you encounter unexpected information that does not match the information here.**
-
-## Working Effectively
-
-### Build System Setup and Commands
-- Bootstrap and build the repository:
-  ```bash
-  # Basic build (library only) - fast
-  cmake -S . -B build -DCMAKE_BUILD_TYPE=Release
-  cmake --build build --parallel $(nproc)
-  # Build time: ~30 seconds. NEVER CANCEL. Set timeout to 120+ seconds.
-  
-  # Build with examples  
-  cmake -S . -B build -DCMAKE_BUILD_TYPE=Release -DFTXUI_BUILD_EXAMPLES=ON
-  cmake --build build --parallel $(nproc)
-  # Build time: ~70 seconds. NEVER CANCEL. Set timeout to 180+ seconds.
-  
-  # Build with examples and tests
-  cmake -S . -B build -DCMAKE_BUILD_TYPE=Release -DFTXUI_BUILD_EXAMPLES=ON -DFTXUI_BUILD_TESTS=ON
-  cmake --build build --parallel $(nproc)
-  # Build time: ~113 seconds (includes GoogleTest download). NEVER CANCEL. Set timeout to 300+ seconds.
-  ```
-
-- Alternative build with Ninja (faster):
-  ```bash
-  cmake -S . -B build -G Ninja -DCMAKE_BUILD_TYPE=Release -DFTXUI_BUILD_EXAMPLES=ON
-  ninja -C build
-  # Build time: ~62 seconds. NEVER CANCEL. Set timeout to 180+ seconds.
-  ```
-
-- Run unit tests:
-  ```bash
-  # Configure with tests enabled first, then:
-  cd build && ctest --output-on-failure
-  # Test time: ~4 seconds (302 tests). NEVER CANCEL. Set timeout to 60+ seconds.
-  ```
-
-### Bazel Support
-- FTXUI also supports Bazel build system
-- **WARNING**: Bazel may fail due to network connectivity issues in sandboxed environments
-- If Bazel is available:
-  ```bash
-  bazel build //...  # Build everything
-  bazel test //...   # Run tests
-  ```
-
-## Validation
-
-### Manual Testing After Changes
-- **ALWAYS manually validate changes by building and running examples after making code modifications**
-- Run example applications to verify functionality:
-  ```bash
-  # Build an example first
-  cmake --build build --target ftxui_example_border
-  
-  # Run examples (they are interactive, use timeout to terminate)
-  timeout 2s build/examples/dom/ftxui_example_border
-  timeout 2s build/examples/dom/ftxui_example_color_gallery
-  timeout 2s build/examples/component/ftxui_example_button
-  ```
-- Examples should produce visual terminal output with borders, colors, and UI components
-- **CRITICAL**: Always run at least one DOM example and one Component example to verify both modules work
-
-### Code Quality and Formatting
-- Always run formatting before committing:
-  ```bash
-  ./tools/format.sh
-  # Format time: ~7 seconds. NEVER CANCEL. Set timeout to 60+ seconds.
-  ```
-- The format script adds license headers and runs clang-format on all source files
-- **Required**: Run formatting or the CI (.github/workflows/build.yaml) will fail
-
-### Build Validation Requirements
-- ALWAYS build with both `-DFTXUI_BUILD_EXAMPLES=ON` and `-DFTXUI_BUILD_TESTS=ON` when making changes
-- Run the complete test suite with `ctest --output-on-failure`
-- All 302 tests must pass
-- **Scenario Testing**: Run at least these validation scenarios:
-  1. Build library only (basic validation)
-  2. Build with examples and run 2-3 different examples
-  3. Build with tests and run complete test suite
-  4. Run formatting tool to ensure code style compliance
-
-## Project Structure
-
-### Key Directories
-```
-/home/runner/work/FTXUI/FTXUI/
-├── include/ftxui/           # Public header files
-│   ├── component/           # Interactive component headers
-│   ├── dom/                 # DOM element headers  
-│   ├── screen/              # Screen and rendering headers
-│   └── util/                # Utility headers
-├── src/ftxui/               # Implementation files
-│   ├── component/           # Interactive components (buttons, menus, etc.)
-│   ├── dom/                 # DOM elements (layout, styling, text)
-│   ├── screen/              # Screen rendering and terminal handling
-│   └── util/                # Utilities
-├── examples/                # Example applications
-│   ├── component/           # Interactive component examples
-│   └── dom/                 # DOM element examples
-├── cmake/                   # CMake configuration files
-├── tools/                   # Development tools (formatting, etc.)
-└── .github/workflows/       # CI/CD configuration
-```
-
-### Core Library Modules
-FTXUI is organized into three main modules that depend on each other:
-```
-┌component──┐  (Interactive UI components)
-│┌dom──────┐│  (Layout and styling elements)  
-││┌screen─┐││  (Terminal rendering and input)
-└┴┴───────┴┴┘
-```
-
-1. **screen**: Low-level terminal handling, colors, pixels, input
-2. **dom**: Layout elements (hbox, vbox, text, borders, etc.)
-3. **component**: Interactive components (buttons, menus, input fields)
-
-### CMake Build Options
-| Option                            | Description                      | Default |
-|-----------------------------------|----------------------------------|---------|
-| FTXUI_BUILD_EXAMPLES              | Build example applications       | OFF     |
-| FTXUI_BUILD_DOCS                  | Build documentation             | OFF     |  
-| FTXUI_BUILD_TESTS                 | Build and enable tests          | OFF     |
-| FTXUI_BUILD_MODULES               | Build C++20 modules             | OFF     |
-| FTXUI_ENABLE_INSTALL              | Generate install targets        | ON      |
-| FTXUI_MICROSOFT_TERMINAL_FALLBACK | Windows terminal compatibility  | ON/OFF  |
-
-## Common Tasks
-
-### Building Examples
-```bash
-# Build specific examples
-cmake --build build --target ftxui_example_border
-cmake --build build --target ftxui_example_button
-cmake --build build --target ftxui_example_menu
-
-# List all available examples
-find build -name "ftxui_example_*" -type f
-```
-
-### Running Tests
-```bash
-# Run all tests
-cd build && ctest
-
-# Run tests with verbose output
-cd build && ctest --verbose
-
-# Run specific test pattern
-cd build && ctest -R "Button" --verbose
-```
-
-### Working with Source Code
-- **Component Development**: Modify files in `src/ftxui/component/` for interactive elements
-- **DOM Development**: Modify files in `src/ftxui/dom/` for layout and styling
-- **Screen Development**: Modify files in `src/ftxui/screen/` for terminal rendering
-- **Adding Examples**: Add new `.cpp` files in `examples/component/` or `examples/dom/`
-- **Header Files**: Public APIs are in `include/ftxui/[module]/`
-
-### Integration Patterns
-When adding FTXUI to a project, use CMake FetchContent (recommended):
-```cmake
-include(FetchContent)
-FetchContent_Declare(ftxui
-  GIT_REPOSITORY https://github.com/ArthurSonzogni/ftxui
-  GIT_TAG v6.1.9
-)
-FetchContent_MakeAvailable(ftxui)
-
-target_link_libraries(your_target PRIVATE
-    ftxui::component  # For interactive components
-    ftxui::dom        # For layout elements  
-    ftxui::screen     # For basic rendering
-)
-```
-
-## Troubleshooting
-
-### Build Issues
-- If CMake configuration fails, ensure C++20 support: `cmake --version` (need 3.12+)
-- If Ninja build fails, fall back to Make: `cmake -S . -B build` (without `-G Ninja`)
-- If tests fail to build, GoogleTest download might have failed - check network connectivity
-- Build artifacts are in `build/` directory - delete with `rm -rf build` to clean
-
-### Example Issues  
-- Examples are interactive terminal applications - use `timeout` to terminate them
-- If examples don't display correctly, terminal might not support colors/Unicode
-- Examples require terminal size of at least 80x24 for proper display
-
-### Formatting Issues
-- Format script requires clang-format to be installed
-- If format script fails, check that source files are not read-only
-- Format script modifies files in-place - commit changes afterwards
-
-## Critical Reminders
-
-- **NEVER CANCEL long-running builds** - they may take 2-3 minutes
-- **ALWAYS run the formatting tool** before committing changes  
-- **ALWAYS build and test examples** when making component/dom changes
-- **SET APPROPRIATE TIMEOUTS**: 300+ seconds for builds, 60+ seconds for tests
-- **BUILD TIMING EXPECTATIONS**:
-  - Basic library: ~30 seconds
-  - With examples: ~70 seconds  
-  - With examples + tests: ~113 seconds (first time, includes GoogleTest download)
-  - Subsequent builds: ~60-70 seconds
-  - Tests execution: ~4 seconds
-  - Formatting: ~7 seconds

.github/workflows/documentation.yaml

@@ -12,10 +12,6 @@ jobs:
     steps:
       - name: "Checkout repository"
         uses: actions/checkout@v3
-        with:
-          fetch-depth: 0   # Need full history.
-          fetch-tags: true # Need tags.
-
 
       - name: "Install cmake"
         uses: lukka/get-cmake@latest
@@ -34,23 +30,19 @@ jobs:
           sudo apt-get install graphviz;
 
       - name: "Build documentation"
-        run: |
-          python3 ./tools/build_multiversion_doc.py
-
-      - name: "Build examples"
         run: >
-          mkdir -p multiversion_docs/main/examples;
           mkdir build;
           cd build;
           emcmake cmake ..
           -DCMAKE_BUILD_TYPE=Release
-          -DFTXUI_BUILD_DOCS=OFF
+          -DFTXUI_BUILD_DOCS=ON
           -DFTXUI_BUILD_EXAMPLES=ON
           -DFTXUI_BUILD_TESTS=OFF
           -DFTXUI_BUILD_TESTS_FUZZER=OFF
           -DFTXUI_ENABLE_INSTALL=OFF
           -DFTXUI_DEV_WARNINGS=OFF;
           cmake --build . --target doc;
+          cmake --build . ;
           rsync -amv
           --include='*/'
           --include='*.html'
@@ -60,13 +52,13 @@ jobs:
           --include='*.wasm'
           --exclude='*'
           examples
-          ../multiversion_docs/main/examples;
+          doc/doxygen/html;
 
       - name: "Deploy"
         uses: peaceiris/actions-gh-pages@v3
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
-          publish_dir: multiversion_docs
+          publish_dir: build/doc/doxygen/html/
           enable_jekyll: false
           allow_empty_commit: false
           force_orphan: true

.gitignore

@@ -28,7 +28,6 @@ out/
 # .github directory:
 !.github/**/*.yaml
 !.github/**/*.yml
-!.github/**/*.md
 
 # cmake directory:
 !cmake/**/*.in
@@ -70,6 +69,4 @@ out/
 
 # tools directory:
 !tools/**/*.sh
-!tools/**/*.py
 !tools/**/*.cpp
-build/

build/_deps/googlebenchmark-subbuild/CMakeLists.txt

@@ -0,0 +1,42 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+cmake_minimum_required(VERSION 3.31.6)
+
+# Reject any attempt to use a toolchain file. We must not use one because
+# we could be downloading it here. If the CMAKE_TOOLCHAIN_FILE environment
+# variable is set, the cache variable will have been initialized from it.
+unset(CMAKE_TOOLCHAIN_FILE CACHE)
+unset(ENV{CMAKE_TOOLCHAIN_FILE})
+
+# We name the project and the target for the ExternalProject_Add() call
+# to something that will highlight to the user what we are working on if
+# something goes wrong and an error message is produced.
+
+project(googlebenchmark-populate NONE)
+
+
+# Pass through things we've already detected in the main project to avoid
+# paying the cost of redetecting them again in ExternalProject_Add()
+set(GIT_EXECUTABLE [==[/usr/bin/git]==])
+set(GIT_VERSION_STRING [==[2.51.0]==])
+set_property(GLOBAL PROPERTY _CMAKE_FindGit_GIT_EXECUTABLE_VERSION
+  [==[/usr/bin/git;2.51.0]==]
+)
+
+
+include(ExternalProject)
+ExternalProject_Add(googlebenchmark-populate
+                     "UPDATE_DISCONNECTED" "False" "GIT_REPOSITORY" "https://github.com/google/benchmark" "EXTERNALPROJECT_INTERNAL_ARGUMENT_SEPARATOR" "GIT_TAG" "015d1a091af6937488242b70121858bce8fd40e9" "GIT_PROGRESS" "TRUE"
+                    SOURCE_DIR          "/home/runner/work/FTXUI/FTXUI/build/_deps/googlebenchmark-src"
+                    BINARY_DIR          "/home/runner/work/FTXUI/FTXUI/build/_deps/googlebenchmark-build"
+                    CONFIGURE_COMMAND   ""
+                    BUILD_COMMAND       ""
+                    INSTALL_COMMAND     ""
+                    TEST_COMMAND        ""
+                    USES_TERMINAL_DOWNLOAD  YES
+                    USES_TERMINAL_UPDATE    YES
+                    USES_TERMINAL_PATCH     YES
+)
+
+

build/_deps/googletest-subbuild/CMakeLists.txt

@@ -0,0 +1,42 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+cmake_minimum_required(VERSION 3.31.6)
+
+# Reject any attempt to use a toolchain file. We must not use one because
+# we could be downloading it here. If the CMAKE_TOOLCHAIN_FILE environment
+# variable is set, the cache variable will have been initialized from it.
+unset(CMAKE_TOOLCHAIN_FILE CACHE)
+unset(ENV{CMAKE_TOOLCHAIN_FILE})
+
+# We name the project and the target for the ExternalProject_Add() call
+# to something that will highlight to the user what we are working on if
+# something goes wrong and an error message is produced.
+
+project(googletest-populate NONE)
+
+
+# Pass through things we've already detected in the main project to avoid
+# paying the cost of redetecting them again in ExternalProject_Add()
+set(GIT_EXECUTABLE [==[/usr/bin/git]==])
+set(GIT_VERSION_STRING [==[2.51.0]==])
+set_property(GLOBAL PROPERTY _CMAKE_FindGit_GIT_EXECUTABLE_VERSION
+  [==[/usr/bin/git;2.51.0]==]
+)
+
+
+include(ExternalProject)
+ExternalProject_Add(googletest-populate
+                     "UPDATE_DISCONNECTED" "False" "GIT_REPOSITORY" "https://github.com/google/googletest" "EXTERNALPROJECT_INTERNAL_ARGUMENT_SEPARATOR" "GIT_TAG" "23ef29555ef4789f555f1ba8c51b4c52975f0907" "GIT_PROGRESS" "TRUE"
+                    SOURCE_DIR          "/home/runner/work/FTXUI/FTXUI/build/_deps/googletest-src"
+                    BINARY_DIR          "/home/runner/work/FTXUI/FTXUI/build/_deps/googletest-build"
+                    CONFIGURE_COMMAND   ""
+                    BUILD_COMMAND       ""
+                    INSTALL_COMMAND     ""
+                    TEST_COMMAND        ""
+                    USES_TERMINAL_DOWNLOAD  YES
+                    USES_TERMINAL_UPDATE    YES
+                    USES_TERMINAL_PATCH     YES
+)
+
+

cmake/ftxui_install.cmake

@@ -11,6 +11,9 @@ include(CMakePackageConfigHelpers)
 install(
   TARGETS screen dom component
   EXPORT ftxui-targets
+  ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
+  LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}"
+  RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
   )
 
 install(

doc/footer.html

@@ -2,9 +2,16 @@
 <!-- start footer part -->
 <!--BEGIN GENERATE_TREEVIEW-->
 <div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
+  <ul>
+    $navpath
+    <li class="footer">$generatedby <a href="https://www.doxygen.org/index.html"><img class="footer" src="$relpath^doxygen.svg" width="104" height="31" alt="doxygen"/></a> $doxygenversion </li>
+  </ul>
 </div>
 <!--END GENERATE_TREEVIEW-->
 <!--BEGIN !GENERATE_TREEVIEW-->
+<hr class="footer"/><address class="footer"><small>
+$generatedby&#160;<a href="https://www.doxygen.org/index.html"><img class="footer" src="$relpath^doxygen.svg" width="104" height="31" alt="doxygen"/></a> $doxygenversion
+</small></address>
 <!--END !GENERATE_TREEVIEW-->
 </body>
 </html>

include/ftxui/component/receiver.hpp

@@ -4,14 +4,14 @@
 #ifndef FTXUI_COMPONENT_RECEIVER_HPP_
 #define FTXUI_COMPONENT_RECEIVER_HPP_
 
+#include <ftxui/util/warn_windows_macro.hpp>
 #include <algorithm>           // for copy, max
 #include <atomic>              // for atomic, __atomic_base
 #include <condition_variable>  // for condition_variable
-#include <ftxui/util/warn_windows_macro.hpp>
+#include <memory>              // for unique_ptr, make_unique
-#include <memory>   // for unique_ptr, make_unique
+#include <mutex>               // for mutex, unique_lock
-#include <mutex>    // for mutex, unique_lock
+#include <queue>               // for queue
-#include <queue>    // for queue
+#include <utility>             // for move
-#include <utility>  // for move
 
 namespace ftxui {
 

src/ftxui/component/task_runner.hpp

@@ -21,8 +21,8 @@ class TaskRunner {
   auto PostTask(Task task) -> void;
 
   /// Schedules a task to be executed after a certain duration.
-  auto PostDelayedTask(Task task,
+  auto PostDelayedTask(Task task, std::chrono::steady_clock::duration duration)
-                       std::chrono::steady_clock::duration duration) -> void;
+      -> void;
 
   /// Runs the tasks in the queue, return the delay until the next delayed task
   /// can be executed.

tools/build_multiversion_doc.py

@@ -1,222 +0,0 @@
-#!/usr/bin/env python3
-
-import os
-import subprocess
-import shutil
-import tempfile
-import json
-from pathlib import Path
-from typing import List, Dict
-
-class VersionInfo:
-    """A structure to hold all information about a single documentation version."""
-    def __init__(self, name: str, is_main: bool, output_root: Path):
-        self.name = name
-        self.is_main = is_main
-        # Destination directory for the built docs, relative to the output root.
-        self.dest_dir = output_root if is_main else output_root / "en" / name
-        # The path to this version's index.html, relative to the output root.
-        self.index_path_from_root = self.dest_dir / "index.html"
-
-    def __repr__(self) -> str:
-        return f"VersionInfo(name='{self.name}', dest_dir='{self.dest_dir}')"
-
-def run_command(command: List[str], check: bool = True, cwd: Path = None):
-    """
-    Runs a command, prints its output, and handles errors.
-    """
-    command_str = ' '.join(command)
-    print(f"Executing: {command_str} in {cwd or Path.cwd()}")
-    try:
-        # Using capture_output=True to get stdout/stderr
-        result = subprocess.run(
-            command,
-            capture_output=True,
-            text=True,
-            check=check,
-            cwd=cwd
-        )
-        if result.stdout:
-            print(result.stdout)
-        if result.stderr:
-            print(result.stderr)
-        return result
-    except subprocess.CalledProcessError as e:
-        print(f"ERROR: Command failed with exit code {e.returncode}")
-        print(f"Command: {command_str}")
-        if e.stdout:
-            print("--- STDOUT ---")
-            print(e.stdout)
-        if e.stderr:
-            print("--- STDERR ---")
-            print(e.stderr)
-        raise  # Re-raise the exception to halt the script
-
-def get_version_switcher_js(
-    current_version: VersionInfo,
-    all_versions: List[VersionInfo],
-    current_html_file: Path
-) -> str:
-    """
-    Generates the JavaScript for the version switcher dropdown.
-
-    This version pre-calculates the relative path from the current HTML file
-    to the index.html of every other version, simplifying the JS logic.
-    """
-    version_names = [v.name for v in all_versions]
-
-    # Create a dictionary mapping version names to their relative URLs.
-    relative_paths: Dict[str, str] = {}
-    for version in all_versions:
-        # Calculate the relative path from the *parent directory* of the current HTML file
-        # to the target version's index.html.
-        path = os.path.relpath(version.index_path_from_root, current_html_file.parent)
-        relative_paths[version.name] = path
-
-    # Use json.dumps for safe serialization of data into JavaScript.
-    versions_json = json.dumps(version_names)
-    paths_json = json.dumps(relative_paths)
-    current_version_json = json.dumps(current_version.name)
-
-    return f"""
-document.addEventListener('DOMContentLoaded', function() {{
-  const projectNumber = document.getElementById('projectnumber');
-  if (!projectNumber) {{
-    console.warn('Doxygen element with ID "projectnumber" not found. Cannot add version switcher.');
-    return;
-  }}
-
-  const versions = {versions_json};
-  const version_paths = {paths_json};
-  const currentVersion = {current_version_json};
-
-  // Sort versions: 'main' first, then others numerically descending.
-  versions.sort((a, b) => {{
-    if (a === 'main') return -1;
-    if (b === 'main') return 1;
-    return b.localeCompare(a, undefined, {{ numeric: true, sensitivity: 'base' }});
-  }});
-
-  const select = document.createElement('select');
-  select.onchange = function() {{
-    const selectedVersion = this.value;
-    // Navigate directly to the pre-calculated relative path.
-    if (selectedVersion !== currentVersion) {{
-      window.location.href = version_paths[selectedVersion];
-    }}
-  }};
-
-  versions.forEach(v => {{
-    const option = document.createElement('option');
-    option.value = v;
-    option.textContent = v;
-    if (v === currentVersion) {{
-      option.selected = true;
-    }}
-    select.appendChild(option);
-  }});
-
-  // Replace the Doxygen project number element with our dropdown.
-  projectNumber.replaceWith(select);
-
-  // Apply some styling to make it look good.
-  Object.assign(select.style, {{
-    backgroundColor: 'rgba(0, 0, 0, 0.8)',
-    color: 'white',
-    border: '1px solid rgba(255, 255, 255, 0.2)',
-    padding: '5px',
-    borderRadius: '5px',
-    fontSize: '14px',
-    fontFamily: 'inherit',
-    marginLeft: '10px',
-    cursor: 'pointer'
-  }});
-}});
-"""
-
-def main():
-    """Main function to build multi-version documentation."""
-    root_dir = Path.cwd()
-    output_dir = root_dir / "multiversion_docs"
-
-    print("--- 1. Cleaning up old documentation ---")
-    if output_dir.exists():
-        shutil.rmtree(output_dir)
-    output_dir.mkdir(parents=True, exist_ok=True)
-
-    print("--- 2. Getting versions from git ---")
-    git_tags_result = run_command(["git", "tag", "--list", "v*"])
-    # Create a list of version names, starting with 'main'.
-    version_names = ["main"] + sorted(
-        git_tags_result.stdout.splitlines(),
-        reverse=True
-    )
-    # For demonstration, limit the number of versions. Remove this in production.
-    version_names = version_names[:4]
-    print(f"Versions to build: {', '.join(version_names)}")
-
-    # Pre-compute all version information and paths.
-    versions = [
-        VersionInfo(name, name == "main", output_dir)
-        for name in version_names
-    ]
-
-    with tempfile.TemporaryDirectory() as build_dir_str:
-        build_dir = Path(build_dir_str)
-        # --- 3. Build documentation for each version ---
-        for version in versions:
-            print(f"\n--- Building docs for version: {version.name} ---")
-
-            # Create a temporary directory for this version's source code.
-            version_src_dir = build_dir / f"src_{version.name}"
-            version_src_dir.mkdir()
-
-            # Check out the version's source code from git.
-            archive_path = version_src_dir / "source.tar"
-            run_command([
-                "git", "archive", version.name,
-                "--format=tar", f"--output={archive_path}"
-            ])
-            run_command(["tar", "-xf", str(archive_path)], cwd=version_src_dir)
-            archive_path.unlink()
-
-            # Configure and build the docs using CMake.
-            version_build_dir = build_dir / f"build_{version.name}"
-            version_build_dir.mkdir()
-            run_command([
-                "cmake", str(version_src_dir), "-DFTXUI_BUILD_DOCS=ON"
-            ], cwd=version_build_dir)
-            run_command(["make", "doc"], cwd=version_build_dir)
-
-            # Copy the generated HTML files to the final destination.
-            doxygen_html_dir = version_build_dir / "doc" / "doxygen" / "html"
-            if not doxygen_html_dir.is_dir():
-                print(f"FATAL: Doxygen HTML output not found for version {version.name}")
-                exit(1)
-
-            print(f"Copying files to: {version.dest_dir}")
-            shutil.copytree(doxygen_html_dir, version.dest_dir, dirs_exist_ok=True)
-
-    # --- 4. Inject version switcher into all HTML files ---
-    print("\n--- Injecting version switcher JavaScript ---")
-    for version in versions:
-        if not version.dest_dir.exists():
-            print(f"Warning: Destination directory for {version.name} does not exist. Skipping JS injection.")
-            continue
-        
-        print(f"Processing HTML files in: {version.dest_dir}")
-        for html_file in version.dest_dir.rglob("*.html"):
-            js_script = get_version_switcher_js(version, versions, html_file)
-            script_tag = f'<script>{js_script}</script>'
-
-            content = html_file.read_text(encoding='utf-8')
-            # Inject the script right before the closing body tag.
-            new_content = content.replace("</body>", f"{script_tag}\n</body>")
-            html_file.write_text(new_content, encoding='utf-8')
-
-    print("\n--- 5. Finalizing ---")
-    print("Multi-version documentation generated successfully!")
-    print(f"Output located in: {output_dir.resolve()}")
-
-if __name__ == "__main__":
-    main()