[windows] make compile_resources use custom targets instead of generators

mesonbuild/modules/windows.py

@@ -67,11 +67,16 @@ class WindowsModule(ExtensionModule):
             suffix = 'o'
         if not rescomp.found():
             raise MesonException('Could not find Windows resource compiler %s.' % ' '.join(rescomp.get_command()))
-        res_kwargs = {'output': '@BASENAME@.' + suffix,
+
-                      'arguments': res_args}
+        res_kwargs = {
-        res_gen = build.Generator([rescomp], res_kwargs)
+            'output': '@BASENAME@.' + suffix,
-        res_output = res_gen.process_files('Windows resource', args, state)
+            'input': args,
-        return ModuleReturnValue(res_output, [res_output])
+            'command': [rescomp] + res_args,
+        }
+
+        res_target = build.CustomTarget('Windows resource', state.subdir, state.subproject, res_kwargs)
+
+        return ModuleReturnValue(res_target, [res_target])
 
 def initialize():
     return WindowsModule()

test cases/windows/13 resources with custom targets/inc/meson.build

@@ -0,0 +1 @@
+inc = include_directories('resource')

test cases/windows/13 resources with custom targets/inc/resource/resource.h

@@ -0,0 +1 @@
+#define ICON_ID 1

test cases/windows/13 resources with custom targets/meson.build

@@ -0,0 +1,69 @@
+project('winmain', 'c')
+
+# MinGW windres has a bug due to which it doesn't parse args with space properly:
+# https://github.com/mesonbuild/meson/pull/1346
+# https://sourceware.org/bugzilla/show_bug.cgi?id=4933
+if meson.get_compiler('c').get_id() == 'gcc' and host_machine.system() == 'windows'
+  # Construct build_to_src and skip this test if it has spaces
+  # because then the -I flag to windres will also have spaces
+  # and we know the test will fail
+  src_parts = meson.source_root().split('/')
+  build_parts = meson.build_root().split('/')
+
+  # Get the common path (which might just be '/' or 'C:/')
+  common = []
+  done = false
+  count = 0
+  if src_parts.length() > build_parts.length()
+    parts = build_parts
+    other = src_parts
+  else
+    parts = src_parts
+    other = build_parts
+  endif
+  foreach part : parts
+    if not done and part == other.get(count)
+      common += [part]
+    else
+      done = true
+    endif
+    count += 1
+  endforeach
+
+  # Create path components to go down from the build root to the common path
+  count = 0
+  rel = build_parts
+  foreach build : build_parts
+    if count < build_parts.length() - common.length()
+      rel += ['..']
+    endif
+    count += 1
+  endforeach
+
+  # Create path components to go up from the common path to the build root
+  count = 0
+  foreach src : src_parts
+    if count >= common.length()
+      rel += [src]
+    endif
+    count += 1
+  endforeach
+
+  build_to_src = '/'.join(rel)
+
+  if build_to_src.contains(' ')
+    message('build_to_src is: ' + build_to_src)
+    error('MESON_SKIP_TEST build_to_src has spaces')
+  endif
+  # Welcome to the end of this conditional.
+  # We hope you never have to implement something like this.
+endif
+
+subdir('inc')
+subdir('res')
+
+exe = executable('prog', 'prog.c',
+  res,
+  gui_app : true)
+
+test('winmain', exe)

test cases/windows/13 resources with custom targets/prog.c

@@ -0,0 +1,14 @@
+#include<windows.h>
+
+#define MY_ICON 1
+
+int APIENTRY
+WinMain(
+    HINSTANCE hInstance,
+    HINSTANCE hPrevInstance,
+    LPSTR lpszCmdLine,
+    int nCmdShow) {
+    HICON hIcon;
+    hIcon = LoadIcon(NULL, IDI_APPLICATION);
+    return hIcon ? 0 : 1;
+}

test cases/windows/13 resources with custom targets/res/gen-res.py

@@ -0,0 +1,6 @@
+#!/usr/bin/env python3
+
+import sys
+
+with open(sys.argv[1], 'r') as infile, open(sys.argv[2], 'w') as outfile:
+    outfile.write(infile.read().format(icon=sys.argv[3]))

test cases/windows/13 resources with custom targets/res/meson.build

@@ -0,0 +1,13 @@
+win = import('windows')
+
+rc_writer = find_program('./gen-res.py')
+
+rc_target = custom_target('RC source file',
+    input : 'myres.rc.in',
+    output : 'myres.rc',
+    command : [rc_writer, '@INPUT@', '@OUTPUT@', files('sample.ico')],
+    install : false,
+    build_always : true)
+
+res = win.compile_resources(rc_target,
+  include_directories : inc)

test cases/windows/13 resources with custom targets/res/myres.rc.in

@@ -0,0 +1,4 @@
+#include<windows.h>
+#include"resource.h"
+
+ICON_ID ICON "{icon}"