Build HTML versions of the man pages

And install them in the same directory as the API reference, so it's
possible to link them.

Fixes: #2896

docs/reference/gio/meson.build

@@ -1,8 +1,17 @@
+gio_manpages = [
+  'gapplication',
+  'gdbus-codegen',
+  'gdbus',
+  'gio-querymodules',
+  'gio',
+  'glib-compile-resources',
+  'glib-compile-schemas',
+  'gresource',
+  'gsettings',
+]
+
 if get_option('man-pages').enabled()
-  manpages = ['gapplication', 'gio-querymodules', 'glib-compile-schemas',
-              'glib-compile-resources', 'gsettings', 'gresource', 'gdbus',
-              'gio', 'gdbus-codegen']
-  foreach page : manpages
+  foreach page: gio_manpages
     custom_target(page + '-man',
       input: page + '.rst',
       output: page + '.1',
@@ -19,6 +28,25 @@ if get_option('man-pages').enabled()
   endforeach
 endif
 
+if get_option('documentation')
+  man_html_path = docs_dir / 'gio-2.0'
+
+  foreach page: gio_manpages
+    custom_target(
+      input: page + '.rst',
+      output: page + '.html',
+      command: [
+        rst2html5,
+        '@INPUT@',
+      ],
+      capture: true,
+      install: true,
+      install_dir: man_html_path,
+      install_tag: 'doc',
+    )
+  endforeach
+endif
+
 if get_option('documentation') and enable_gir
   expand_content_files = [
     'dbus-error.md',

docs/reference/glib/meson.build

@@ -1,7 +1,7 @@
+glib_manpages = ['glib-gettextize', 'gtester', 'gtester-report']
 
 if get_option('man-pages').enabled()
-  manpages = ['glib-gettextize', 'gtester', 'gtester-report']
-  foreach page : manpages
+  foreach page: glib_manpages
     custom_target(page + '-man',
       input: page + '.rst',
       output: page + '.1',
@@ -20,37 +20,49 @@ endif
 
 if get_option('documentation')
   # GVariant specification is currently standalone
-  rst2html5 = find_program('rst2html5', 'rst2html5.py', required: false)
+  spec_path = docs_dir / 'glib-2.0'
+  man_html_path = docs_dir / 'glib-2.0'
 
-  if rst2html5.found()
-    spec_path = docs_dir / 'glib-2.0'
+  figures = files(
+    'gvariant-byte-boundaries.svg',
+    'gvariant-integer-and-string-structure.svg',
+    'gvariant-integer-array.svg',
+    'gvariant-string-array.svg',
+  )
 
-    figures = files(
-      'gvariant-byte-boundaries.svg',
-      'gvariant-integer-and-string-structure.svg',
-      'gvariant-integer-array.svg',
-      'gvariant-string-array.svg',
-    )
+  custom_target('gvariant-specification-1.0',
+    input: 'gvariant-specification-1.0.rst',
+    output: 'gvariant-specification-1.0.html',
+    command: [
+      rst2html5,
+      '@INPUT@',
+    ],
+    capture: true,
+    install: true,
+    install_dir: spec_path,
+    install_tag: 'doc',
+    depend_files: figures,
+  )
 
-    custom_target('gvariant-specification-1.0',
-      input: 'gvariant-specification-1.0.rst',
-      output: 'gvariant-specification-1.0.html',
+  install_data(figures,
+    install_dir: spec_path,
+    install_tag: 'doc',
+  )
+
+  foreach page: glib_manpages
+    custom_target(
+      input: page + '.rst',
+      output: page + '.html',
       command: [
         rst2html5,
         '@INPUT@',
       ],
       capture: true,
       install: true,
-      install_dir: spec_path,
+      install_dir: man_html_path,
       install_tag: 'doc',
-      depend_files: figures,
     )
-
-    install_data(figures,
-      install_dir : spec_path,
-      install_tag : 'doc',
-    )
-  endif
+  endforeach
 endif
 
 if get_option('documentation') and enable_gir

docs/reference/gobject/meson.build

@@ -1,6 +1,7 @@
+gobject_manpages = ['glib-mkenums', 'glib-genmarshal', 'gobject-query']
+
 if get_option('man-pages').enabled()
-  manpages = ['glib-mkenums', 'glib-genmarshal', 'gobject-query']
-  foreach page : manpages
+  foreach page: gobject_manpages
     custom_target(page + '-man',
       input: page + '.rst',
       output: page + '.1',
@@ -17,6 +18,25 @@ if get_option('man-pages').enabled()
   endforeach
 endif
 
+if get_option('documentation')
+  man_html_path = docs_dir / 'gobject-2.0'
+
+  foreach page: gobject_manpages
+    custom_target(
+      input: page + '.rst',
+      output: page + '.html',
+      command: [
+        rst2html5,
+        '@INPUT@',
+      ],
+      capture: true,
+      install: true,
+      install_dir: man_html_path,
+      install_tag: 'doc',
+    )
+  endforeach
+endif
+
 if get_option('documentation') and enable_gir
   expand_content_files = [
     'boxed.md',

meson.build

@@ -2648,9 +2648,11 @@ if rst2man.found()
   rst2man_flags = [
     '--syntax-highlight=none',
   ]
-  man1_dir = join_paths(glib_prefix, get_option('mandir'), 'man1')
+  man1_dir = glib_prefix / get_option('mandir') / 'man1'
 endif
 
+rst2html5 = find_program('rst2html5', 'rst2html5.py', required: get_option('documentation'))
+
 gnome = import('gnome')
 subdir('docs/reference')