meson: docs/internals: build html files

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Neal Gompa <ngompa13@gmail.com>

docs/internals/meson.build

@@ -0,0 +1,34 @@
+internals_in_files = [
+  'command',
+  'eventloop',
+  'locking',
+  'rpc',
+]
+
+foreach name : internals_in_files
+  html_in_file = '@0@.html.in'.format(name)
+  html_file = '@0@.html'.format(name)
+
+  custom_target(
+    html_file,
+    input: html_in_file,
+    output: html_file,
+    command: [
+      meson_python_prog,
+      python3_prog.path(),
+      meson_html_gen_prog.path(),
+      xsltproc_prog.path(),
+      xmllint_prog.path(),
+      meson.build_root(),
+      docs_timestamp,
+      subsite_xsl,
+      '@INPUT@',
+      '@OUTPUT@',
+      'internals' / html_in_file,
+    ],
+    depends: [ aclperms_gen ],
+    depend_files: [ page_xsl ],
+    install: true,
+    install_dir: docs_html_dir / 'internals',
+  )
+endforeach