A very simple utility script to automatically compare groff and mandoc

output on collections of manual source files.  I'm using this for quite
some time now, and it has proven to be rather useful.

Obviously, this will not be installed on user's systems.

1 files changed, 35 insertions, 0 deletions

diff --git a/gmdiff b/gmdiff
new file mode 100644
index 00000000..a5bca9d3
--- /dev/null
+++ b/gmdiff
@@ -0,0 +1,35 @@
+#!/bin/sh
+# Copyright (c) 2013 Ingo Schwarze <schwarze@openbsd.org>
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+if [ `id -u` -eq 0 ]; then
+  echo "$0: do not run me as root"
+  exit 1
+fi
+
+if [ $# -eq 0 ]; then
+  echo "usage: $0 manual_source_file ..."
+  exit 1
+fi
+
+while [ -n "$1" ]; do
+  file=$1
+  shift
+  echo " ========== $file ========== "
+  tbl $file | groff -mandoc -Tascii -P -c 2>&1 > /tmp/groff.out
+  mandoc -Ios='OpenBSD ports' -Werror $file 2>&1 > /tmp/mandoc.out
+  diff -au /tmp/groff.out /tmp/mandoc.out 2>&1
+done
+
+exit 0