build of lua-ldoc and packages using it made reproducible

debian/changelog

+lua-ldoc (1.4.3-3) unstable; urgency=medium
+
+  * Pass -d to txt2man to make the build reproducible
+  * Patch: add support to date overriding via --date to help
+    reproducible builds
+
+ -- Enrico Tassi <gareuselesinge@debian.org>  Tue, 18 Aug 2015 11:06:49 +0200
+
 lua-ldoc (1.4.3-2) unstable; urgency=medium
 
   * Patch: close missing bracket in template file 

debian/patches/0004-make-system-date-override-able-via-date.patch

+From: Enrico Tassi <gareuselesinge@debian.org>
+Date: Tue, 18 Aug 2015 11:18:01 +0200
+Subject: make system date override-able via --date
+
+---
+ ldoc.lua | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/ldoc.lua b/ldoc.lua
+index 3454bcf..3af3b2b 100644
+--- a/ldoc.lua
++++ b/ldoc.lua
+@@ -61,6 +61,7 @@ ldoc, a documentation generator for Lua, vs 1.4.3
+   -M,--merge allow module merging
+   -S,--simple no return or params, no summary
+   -O,--one one-column output layout
++  --date  (default system) use this date in generated doc
+   --dump                debug output dump
+   --filter (default none) filter output as Lua data (e.g pl.pretty.dump)
+   --tags (default none) show all references to given tags, comma-separated
+@@ -781,7 +782,11 @@ ldoc.modules = module_list
+ ldoc.title = ldoc.title or args.title
+ ldoc.project = ldoc.project or args.project
+ ldoc.package = args.package:match '%a+' and args.package or nil
++if args.date == 'system' then
+ ldoc.updatetime = os.date("%Y-%m-%d %H:%M:%S")
++else
++ldoc.updatetime = args.date
++end
+ 
+ local html = require 'ldoc.html'
+ 

debian/patches/series

 0001-Fix-the-interpreter-to-lua5.2-since-lua-may-be-lua50.patch
 0002-Remove-non-existing-one-1.md-from-tests-config.ld.patch
 0003-Fix-broken-template-missing-closing-bracket.patch
+0004-make-system-date-override-able-via-date.patch

debian/rules

@@ -12,7 +12,8 @@ override_dh_auto_install:
 	mv out/ html
 
 override_dh_installman:
-	txt2man -v "" -r "ldoc" -t "ldoc 1" debian/ldoc.1.txt > debian/ldoc.1
+	txt2man -d "`dpkg-parsechangelog -S date`"\
+	       	-v "" -r "ldoc" -t "ldoc 1" debian/ldoc.1.txt > debian/ldoc.1
 	dh_installman
 
 override_dh_auto_clean: