Disable docs in RHEL builds

ocaml-dune is the only consumer of sphinx-copybutton in RHEL/ELN,
and the recent addition of sphinx-design pulls in many unwanted
Python build dependencies.

ocaml-dune.spec

@@ -7,9 +7,12 @@
 # library in Fedora, so don't build it.
 %bcond lwt 0
 
+# docs are not needed in RHEL, and add unwanted build dependencies
+%bcond docs %{undefined rhel}
+
 Name:           ocaml-dune
 Version:        3.15.0
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        Composable build system for OCaml and Reason
 
 # Dune itself is MIT.  Some bundled libraries have a different license:
@@ -54,10 +57,13 @@ BuildRequires:  ocaml-compiler-libs
 BuildRequires:  ocaml-csexp-devel >= 1.5.0
 BuildRequires:  ocaml-pp-devel >= 1.2.0
 BuildRequires:  ocaml-rpm-macros
+
+%if %{with docs}
 BuildRequires:  %{py3_dist sphinx}
 BuildRequires:  %{py3_dist sphinx-copybutton}
 BuildRequires:  %{py3_dist sphinx-design}
 BuildRequires:  %{py3_dist sphinx-rtd-theme}
+%endif
 
 %if %{with lwt}
 BuildRequires:  ocaml-lwt-devel >= 5.6.0
@@ -114,6 +120,7 @@ adapted to the open source world. It has matured over a long time and is used
 daily by hundred of developers, which means that it is highly tested and
 productive.
 
+%if %{with docs}
 %package        doc
 # The content is MIT.  Other licenses are due to files added by sphinx.
 # BSD-2-Clause:
@@ -143,6 +150,7 @@ BuildArch:      noarch
 
 %description    doc
 HTML documentation for dune, a composable build system for OCaml.
+%endif
 
 %package        emacs
 Summary:        Emacs support for %{name}
@@ -477,7 +485,9 @@ sed -i 's/, < 6//'g doc/requirements.txt
   --sbindir %{_sbindir}
 
 %make_build release
+%if %{with docs}
 %make_build doc
+%endif
 
 # We also want the libraries
 # Do not use the bundled csexp and pp when building them
@@ -507,8 +517,10 @@ cd -
 %{_bindir}/dune
 %{_mandir}/man*/dune*
 
+%if %{with docs}
 %files doc
 %doc doc/_build/*
+%endif
 
 %files emacs
 %{_emacs_sitelispdir}/dune*
@@ -576,6 +588,9 @@ cd -
 %files -n ocaml-xdg-devel -f .ofiles-xdg-devel
 
 %changelog
+* Mon Apr 08 2024 Yaakov Selkowitz <yselkowi@redhat.com> - 3.15.0-2
+- Disable docs in RHEL builds
+
 * Fri Apr  5 2024 Jerry James <loganjerry@gmail.com> - 3.15.0-1
 - Version 3.15.0