[libvirt] [PATCH 3/6] build: introduce rst2html as a mandatory build tool

[Daniel P. Berrangé]

The rst2html tool is provided by python docutils, and as the name
suggests, it converts RST documents into HTML.

This enables us to start writing docs on our website in RST format
instead of HTML, without changing the rest of our website templating
system away from XSLT yet.

Signed-off-by: Daniel P. Berrangé <berrange at redhat.com>
---
 libvirt.spec.in              | 2 ++
 m4/virt-external-programs.m4 | 5 +++++
 mingw-libvirt.spec.in        | 1 +
 3 files changed, 8 insertions(+)

diff --git a/libvirt.spec.in b/libvirt.spec.in
index dcad08cb5f..84efe47ffc 100644
--- a/libvirt.spec.in
+++ b/libvirt.spec.in
@@ -260,6 +260,8 @@ BuildRequires: automake
 BuildRequires: gettext-devel
 BuildRequires: libtool
 BuildRequires: /usr/bin/pod2man
+# Replace with python3-docutils when we drop py2 support
+BuildRequires: /usr/bin/rst2html
 %endif
 BuildRequires: gcc
 BuildRequires: git
diff --git a/m4/virt-external-programs.m4 b/m4/virt-external-programs.m4
index 0f995998c3..b7779f159e 100644
--- a/m4/virt-external-programs.m4
+++ b/m4/virt-external-programs.m4
@@ -33,6 +33,11 @@ AC_DEFUN([LIBVIRT_CHECK_EXTERNAL_PROGRAMS], [
   then
     AC_MSG_ERROR("xsltproc is required to build libvirt")
   fi
+  AC_PATH_PROG([RST2HTML], [rst2html], [])
+  if test -z "$RST2HTML"
+  then
+    AC_MSG_ERROR("rst2html is required to build libvirt")
+  fi
   AC_PATH_PROG([AUGPARSE], [augparse], [/usr/bin/augparse])
   AC_PROG_MKDIR_P
   AC_PROG_LN_S
diff --git a/mingw-libvirt.spec.in b/mingw-libvirt.spec.in
index c29f3eeed2..35f1abc13d 100644
--- a/mingw-libvirt.spec.in
+++ b/mingw-libvirt.spec.in
@@ -82,6 +82,7 @@ BuildRequires: automake
 BuildRequires: gettext-devel
 BuildRequires: libtool
 %endif
+BuildRequires: python3-docutils
 
 BuildRequires: mingw32-libssh2
 BuildRequires: mingw64-libssh2
-- 
2.23.0