1 files changed, 46 insertions, 0 deletions
diff --git a/advtrains/locale/update-l10n.lua b/advtrains/locale/update-l10n.lua
new file mode 100644
index 0000000..011f9c6
--- /dev/null
+++ b/advtrains/locale/update-l10n.lua
@@ -0,0 +1,46 @@
+local lang = arg[1] or error("No language supplied")
+local tfn = string.format("advtrains.%s.tr", lang)
+local f = io.open(tfn, "rb") or error("Cannot read from translation file")
+local tf = {}
+for l in f:lines() do
+	tf[#tf+1] = l
+end
+f:close()
+
+local ot = {[0] = ""}
+local f = io.open("template.txt", "rb") or error("Cannot read from translation template")
+for l in f:lines() do
+	if l == "" then -- blank line
+		if ot[#ot] ~= l then ot[#ot+1] = l end
+	elseif l:find("^#") then -- comment
+		if ot[#ot] ~= l then ot[#ot+1] = l end
+	else
+		s = l:match("^(.+[^@]=)")
+		if s then
+			local found = false
+			for i = 1, #tf, 1 do
+				if tf[i]:find(s, 1, true) == 1 then
+					found = i
+					break
+				end
+			end
+			if found then
+				local fc = found-1
+				while fc > 0 do
+					if not tf[fc]:find("^#") then break end
+					fc = fc-1
+				end
+				for i = fc+1, found, 1 do
+					if ot[#ot] ~= tf[i] then ot[#ot+1] = tf[i] end
+				end
+			else
+				if ot[#ot] ~= l then ot[#ot+1] = l end
+			end
+		end
+	end
+end
+f:close()
+
+local f = io.open(tfn, "wb") or error("Cannot write to translation file")
+f:write(table.concat(ot,"\n"))
+f:close()
+\ No newline at end of file