Use go-md2man for building manpages

go-md2man is already used by other containers components, and is
therefore available in the RHEL buildroot, where pandoc (due to its
build dependency on the GHC stack) is not.

https://github.com/containers/composefs/pull/227

227.patch

@@ -0,0 +1,54 @@
+From 297fdf109a28d0b35a38659ce6a8962c15975a7f Mon Sep 17 00:00:00 2001
+From: Yaakov Selkowitz <yselkowi@redhat.com>
+Date: Thu, 9 Nov 2023 15:13:12 -0500
+Subject: [PATCH] Use go-md2man for building manpages
+
+go-md2man is already used by other containers components, and is
+therefore available in the RHEL buildroot, where pandoc (due to its
+build dependency on the GHC stack) is not.
+
+Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
+---
+Removed conflicting composefs.spec.in hunk which is not useful here.
+
+ Makefile.am       | 4 ++--
+ composefs.spec.in | 2 +-
+ configure.ac      | 6 +++---
+ 3 files changed, 6 insertions(+), 6 deletions(-)
+
+diff --git a/Makefile.am b/Makefile.am
+index 753a5a8..2b456cb 100644
+--- a/Makefile.am
++++ b/Makefile.am
+@@ -28,11 +28,11 @@ if ENABLE_MAN
+ 
+ man/%.1: man/%.md
+ 	mkdir -p man
+-	${PANDOC} $+ -s -t man > $@
++	${MD2MAN} -in $^ -out $@
+ 
+ man/%.5: man/%.md
+ 	mkdir -p man
+-	${PANDOC} $+ -s -t man > $@
++	${MD2MAN} -in $^ -out $@
+ 
+ man1_MANS = $(MAN1PAGES:.md=.1)
+ man5_MANS = $(MAN5PAGES:.md=.5)
+diff --git a/configure.ac b/configure.ac
+index 29f86af..40ea60d 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -104,10 +104,10 @@ AC_ARG_ENABLE(man,
+               enable_man=maybe)
+ 
+ AS_IF([test "$enable_man" != no], [
+-  AC_PATH_PROG([PANDOC], [pandoc])
+-  AS_IF([test -z "$PANDOC"], [
++  AC_PATH_PROG([MD2MAN], [go-md2man])
++  AS_IF([test -z "$MD2MAN"], [
+     AS_IF([test "$enable_man" = yes], [
+-      AC_MSG_ERROR([pandoc is required for --enable-man])
++      AC_MSG_ERROR([go-md2man is required for --enable-man])
+     ])
+     enable_man=no
+   ],[

composefs.spec

@@ -1,13 +1,16 @@
 Name:           composefs
 Version:        1.0.1
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        Tools to handle creating and mounting composefs images
 
 License:        GPL-3.0-or-later AND LGPL-2.0-or-later AND Apache-2.0
 URL:            https://github.com/containers/composefs
 Source0:        https://github.com/containers/composefs/releases/download/v%{version}/%{name}-%{version}.tar.xz
+# Use go-md2man instead of pandoc for building manpages
+# https://github.com/containers/composefs/pull/227 (backported)
+Patch0:         227.patch
 
-BuildRequires:  gcc automake libtool openssl-devel yajl-devel pandoc fuse3-devel
+BuildRequires:  gcc automake libtool openssl-devel yajl-devel go-md2man fuse3-devel
 Requires:       %{name}-libs = %{version}-%{release}
 
 %description
@@ -34,7 +37,9 @@ License:        LGPL-2.1-or-later AND (GPL-2.0-only OR Apache-2.0)
 Library files for %{name}.
 
 %prep
-%autosetup
+%autosetup -p1
+# for go-md2man patch
+autoreconf -fiv
 
 %build
 %configure \