Adding tools to build with python 3.6 directly

.travis.yml

@@ -1,6 +1,7 @@
 language: cpp
 sudo: false
-
+python:
+    - "3.6"
 cache:
   directories:
     - ${TRAVIS_BUILD_DIR}/deps/cmake

CMakeLists.txt

@@ -1,26 +1,51 @@
-cmake_minimum_required(VERSION 2.8 FATAL_ERROR)
+cmake_minimum_required(VERSION 3.1 FATAL_ERROR)
 
 project(CLI11 CXX)
 
 SET(CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake" ${CMAKE_MODULE_PATH})
 
-# C++11 without GNU extensions
-# Requires CMAKE 3.1+ for Mac
-if(${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} LESS 3.1)
-    add_compile_options(-std=c++11)
-else()
-    cmake_policy(VERSION 3.1) # Needed for Mac
+if(CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME)
+    set(CUR_PROJ ON)
     set(CMAKE_CXX_STANDARD 11)
     set(CMAKE_CXX_EXTENSIONS OFF)
     set(CMAKE_CXX_STANDARD_REQUIRED ON)
+else()
+    set(CUR_PROJ OFF)
 endif()
-# be moderately paranoid with flags
+
+# Be moderately paranoid with flags
+# But only globally, don't inherit
 add_compile_options(-pedantic -Wall -Wextra)
 
-include_directories(include)
-set(headers "${PROJECT_SOURCE_DIR}/include/CLI.hpp")
+add_library(CLI INTERFACE)
+target_include_directories(CLI INTERFACE "${CMAKE_CURRENT_SOURCE_DIR}/include")
 
-enable_testing()
-add_subdirectory(tests)
+# Single file test
+option(CLI_SINGLE_FILE "Generate a single header file (and test)" ${CUR_PROJ})
+if(CLI_SINGLE_FILE)
+    file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/include")
+    add_custom_command(OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/include/CLI11.hpp"
+        COMMAND python "${CMAKE_CURRENT_SOURCE_DIR}/scripts/MakeSingleHeader.py" "${CMAKE_CURRENT_BINARY_DIR}/include/CLI11.hpp"
+        DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/include/CLI/CLI.hpp"
+        IMPLICIT_DEPENDS CXX "${CMAKE_CURRENT_SOURCE_DIR}/include/CLI/CLI.hpp"
+        )
+    add_custom_target(generate_cli_single_file
+        DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/include/CLI11.hpp")
 
-add_subdirectory(examples)
+    add_library(CLI_SINGLE INTERFACE)
+    target_link_libraries(CLI_SINGLE INTERFACE CLI)
+    add_dependencies(CLI_SINGLE generate_cli_single_file)
+    target_compile_definitions(CLI_SINGLE INTERFACE -DCLI_SINGLE_FILE)
+    target_include_directories(CLI_SINGLE INTERFACE "${CMAKE_CURRENT_BINARY_DIR}/include/")
+endif()
+
+option(CLI_TESTING "Build the tests and add them" ${CUR_PROJ})
+if(CLI_TESTING)
+    enable_testing()
+    add_subdirectory(tests)
+endif()
+
+option(CLI_EXAMPLES "Build the examples" ${CUR_PROJ})
+if(CLI_EXAMPLES)
+    add_subdirectory(examples)
+endif()

cmake/AddGoogletest.cmake

@@ -32,7 +32,7 @@ include_directories(${gtest_SOURCE_DIR}/include)
 
 # Target must already exist
 macro(add_gtest TESTNAME)
-    target_link_libraries(${TESTNAME} gtest gtest_main)
+    target_link_libraries(${TESTNAME} PUBLIC gtest gtest_main)
     add_test(${TESTNAME} ${TESTNAME})
 endmacro()
 

examples/CMakeLists.txt

@@ -1,2 +1,4 @@
-add_executable(try try.cpp ${headers})
-add_executable(try1 try1.cpp ${headers})
+add_executable(try try.cpp)
+target_link_libraries(try PUBLIC CLI)
+add_executable(try1 try1.cpp)
+target_link_libraries(try1 PUBLIC CLI)

scripts/MakeSingleHeader.py

@@ -2,35 +2,36 @@
 
 # Requires Python 3.6
 
-from plumbum import local, cli, FG
 import re
+import argparse
+from pathlib import Path
 
 includes_local = re.compile(r"""^#include "(.*)"$""", re.MULTILINE)
 includes_system = re.compile(r"""^#include \<(.*)\>$""", re.MULTILINE)
 
-DIR = local.path(__file__).dirname
-BDIR = DIR / '../include'
+DIR = Path(__file__).resolve().parent
+BDIR = DIR.parent / 'include'
 
-class MakeHeader(cli.Application):
+def MakeHeader(out):
+    main_header = BDIR / 'CLI/CLI.hpp'
+    with main_header.open() as f:
+        header = f.read()
 
-    def main(self, out : cli.NonexistentPath = BDIR / 'CLI11.hpp'):
-        main_header = BDIR / 'CLI/CLI.hpp'
-        header = main_header.read()
+    include_files = includes_local.findall(header)
 
-        include_files = includes_local.findall(header)
+    headers = set()
+    output = ''
+    with open('output.hpp', 'w') as f:
+        for inc in include_files:
+            with (BDIR / inc).open() as f:
+                inner = f.read()
+            headers |= set(includes_system.findall(inner))
+            output += f'\n// From {inc}\n\n'
+            output += inner[inner.find('namespace'):]
 
-        headers = set()
-        output = ''
-        with open('output.hpp', 'w') as f:
-            for inc in include_files:
-                inner = (BDIR / inc).read()
-                headers |= set(includes_system.findall(inner))
-                output += f'\n// From {inc}\n\n'
-                output += inner[inner.find('namespace'):]
+    header_list = '\n'.join(f'#include <{h}>' for h in headers)
 
-        header_list = '\n'.join(f'#include <{h}>' for h in headers)
-
-        output = f'''\
+    output = f'''\
 #pragma once
 
 // Distributed under the LGPL version 3.0 license.  See accompanying
@@ -42,12 +43,14 @@ class MakeHeader(cli.Application):
 {header_list}
 {output}'''
 
-        with out.open('w') as f:
-            f.write(output)
+    with Path(out).open('w') as f:
+        f.write(output)
+
+    print(f"Created {out}")
 
-        print(f"Created {out}")
 
 if __name__ == '__main__':
-    MakeHeader()
-
-
+    parser = argparse.ArgumentParser()
+    parser.add_argument("output", nargs='?', default=BDIR / 'CLI11.hpp')
+    args = parser.parse_args()
+    MakeHeader(args.output)

tests/CLITest.cpp

@@ -1,5 +1,9 @@
-
+#ifdef CLI_SINGLE_FILE
+#include "CLI11.hpp"
+#else
 #include "CLI/CLI.hpp"
+#endif
+
 #include "gtest/gtest.h"
 #include <fstream>
 

tests/CMakeLists.txt

@@ -1,7 +1,21 @@
 include(AddGoogletest)
 
-add_executable(CLITest CLITest.cpp ${headers})
+add_executable(CLITest CLITest.cpp)
+target_link_libraries(CLITest PUBLIC CLI)
 add_gtest(CLITest)
 
-add_executable(SmallTest SmallTest.cpp ${headers})
+add_executable(SmallTest SmallTest.cpp)
+target_link_libraries(SmallTest PUBLIC CLI)
 add_gtest(SmallTest)
+
+if(CLI_SINGLE_FILE)
+
+    add_executable(CLISingleTest CLITest.cpp)
+    target_link_libraries(CLISingleTest PUBLIC CLI_SINGLE)
+    add_gtest(CLISingleTest)
+
+    add_executable(SmallSingleTest SmallTest.cpp)
+    target_link_libraries(SmallSingleTest PUBLIC CLI_SINGLE)
+    add_gtest(SmallSingleTest)
+
+endif()

tests/SmallTest.cpp

@@ -1,4 +1,8 @@
+#ifdef CLI_SINGLE_FILE
+#include "CLI11.hpp"
+#else
 #include "CLI/CLI.hpp"
+#endif
 #include "gtest/gtest.h"
 #include <cstdio>
 #include <fstream>