From f1afd44b2b2fb85de1c55408b46e50b4381f50d2 Mon Sep 17 00:00:00 2001
From: Jussi Pakkanen <jpakkane@gmail.com>
Date: Wed, 27 Dec 2017 23:40:15 +0200
Subject: [PATCH] Added C++ library sample.

---
 mesonbuild/minit.py | 147 ++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 143 insertions(+), 4 deletions(-)

diff --git a/mesonbuild/minit.py b/mesonbuild/minit.py
index 4ccd590ff..29b5056e6 100644
--- a/mesonbuild/minit.py
+++ b/mesonbuild/minit.py
@@ -21,12 +21,16 @@ from glob import glob
 lib_h_template = '''#pragma once
 #if defined _WIN32 || defined __CYGWIN__
   #ifdef BUILDING_{utoken}
-    #define {utoken}_PUBLIC __attribute__ ((dllexport))
+    #define {utoken}_PUBLIC __declspec(dllexport)
   #else
-    #define {utoken}_PUBLIC __attribute__ ((dllimport))
+    #define {utoken}_PUBLIC __declspec(dllimport)
   #endif
 #else
-  #define {utoken}_PUBLIC __attribute__ ((visibility ("default")))
+  #ifdef BUILDING_{utoken}
+      #define {utoken}_PUBLIC __attribute__ ((visibility ("default")))
+  #else
+      #define {utoken}_PUBLIC
+  #endif
 #endif
 
 int {utoken}_PUBLIC {function_name}();
@@ -119,7 +123,8 @@ int main(int argc, char **argv) {{
 
 hello_c_meson_template = '''project('{project_name}', 'c',
   version : '{version}',
-  default_options : ['warning_level=3'])
+  default_options : ['warning_level=3',
+                     'cpp_std=c++14'])
 
 exe = executable('{exe_name}', '{source_name}',
   install : true)
@@ -151,6 +156,111 @@ exe = executable('{exe_name}', '{source_name}',
 test('basic', exe)
 '''
 
+lib_hpp_template = '''#pragma once
+#if defined _WIN32 || defined __CYGWIN__
+  #ifdef BUILDING_{utoken}
+    #define {utoken}_PUBLIC __declspec(dllexport)
+  #else
+    #define {utoken}_PUBLIC __declspec(dllimport)
+  #endif
+#else
+  #ifdef BUILDING_{utoken}
+      #define {utoken}_PUBLIC __attribute__ ((visibility ("default")))
+  #else
+      #define {utoken}_PUBLIC
+  #endif
+#endif
+
+namespace {namespace} {{
+
+class {utoken}_PUBLIC {class_name} {{
+
+public:
+  {class_name}();
+  int get_number() const;
+  
+private:
+  
+  int number;
+
+}};
+
+}}
+
+'''
+
+lib_cpp_template = '''#include <{header_file}>
+
+namespace {namespace} {{
+
+{class_name}::{class_name}() {{
+    number = 6;
+}}
+
+int {class_name}::get_number() const {{
+  return number;
+}}
+
+}}
+'''
+
+lib_cpp_test_template = '''#include <{header_file}>
+#include <iostream>
+
+int main(int argc, char **argv) {{
+    if(argc != 1) {{
+        printf("%s takes no arguments.\\n", argv[0]);
+        return 1;
+    }}
+    {namespace}::{class_name} c;
+    return c.get_number() != 6;
+}}
+'''
+
+lib_cpp_meson_template = '''project('{project_name}', 'cpp',
+  version : '{version}',
+  default_options : ['warning_level=3', 'cpp_std=c++14'])
+
+# These arguments are only used to build the shared library
+# not the executables that use the library.
+lib_args = ['-DBUILDING_{utoken}']
+
+# Hiding symbols that are not explicitly marked as exported
+# requires a compiler flag on all compilers except VS.
+cpp = meson.get_compiler('cpp')
+if cpp.get_id() != 'msvc'
+  lib_args += ['-fvisibility=hidden']
+endif
+
+shlib = shared_library('{lib_name}', '{source_file}',
+  install : true,
+  cpp_args : lib_args,
+)
+
+test_exe = executable('{test_exe_name}', '{test_source_file}',
+  link_with : shlib)
+test('{test_name}', test_exe)
+
+# Make this library usable as a Meson subproject.
+{ltoken}_dep = declare_dependency(
+  include_directories: include_directories('.'),
+  link_with : shlib)
+
+# Make this library usable from the system's
+# package manager.
+install_headers('{header_file}', subdir : '{header_dir}')
+
+pkg_mod = import('pkgconfig')
+pkg_mod.generate(
+  name : '{project_name}',
+  filebase : '{ltoken}',
+  description : 'Meson sample project.',
+  subdirs : '{header_dir}',
+  libraries : shlib,
+  version : '{version}',
+)
+'''
+
 info_message = '''Sample project created. To build it run the
 following commands:
 
@@ -203,6 +313,33 @@ def create_exe_cpp_sample(project_name, project_version):
                                                                  source_name=source_name,
                                                                  version=project_version))
 
+def create_lib_cpp_sample(project_name, version):
+    lowercase_token = re.sub(r'[^a-z0-9]', '_', project_name.lower())
+    uppercase_token = lowercase_token.upper()
+    class_name = uppercase_token[0] + lowercase_token[1:]
+    namespace = lowercase_token
+    lib_h_name = lowercase_token + '.hpp'
+    lib_c_name = lowercase_token + '.cpp'
+    test_c_name = lowercase_token + '_test.cpp'
+    kwargs = {'utoken': uppercase_token,
+              'ltoken': lowercase_token,
+              'header_dir': lowercase_token,
+              'class_name': class_name,
+              'namespace': namespace,
+              'header_file': lib_h_name,
+              'source_file': lib_c_name,
+              'test_source_file': test_c_name, 
+              'test_exe_name': lowercase_token,
+              'project_name': project_name,
+              'lib_name': lowercase_token,
+              'test_name': lowercase_token,
+              'version': version,
+              }
+    open(lib_h_name, 'w').write(lib_hpp_template.format(**kwargs))
+    open(lib_c_name, 'w').write(lib_cpp_template.format(**kwargs))
+    open(test_c_name, 'w').write(lib_cpp_test_template.format(**kwargs))
+    open('meson.build', 'w').write(lib_cpp_meson_template.format(**kwargs))
+
 def create_sample(options):
     if options.language == 'c':
         if options.type == 'executable':
@@ -214,6 +351,8 @@ def create_sample(options):
     elif options.language == 'cpp':
         if options.type == 'executable':
             create_exe_cpp_sample(options.name, options.version)
+        elif options.type == 'library':
+            create_lib_cpp_sample(options.name, options.version)
         else:
             raise RuntimeError('Unreachable code')
     else: