support config overrides

1 files changed, 30 insertions, 0 deletions

diff --git a/util.lua b/util.lua
index 99bba7b..d678a9e 100644
--- a/util.lua
+++ b/util.lua
@@ -125,6 +125,36 @@ function util.stable_kmerge(t, u, k)
 	return res
 end
 
+function util.flatten_table(src, dst, prefix)
+	local dst = dst or {}
+	for k, v in pairs(src) do
+		local k = prefix and prefix .. '.' .. k or k
+		if type(v) == 'table' then
+			util.flatten_table(v, dst, k)
+		else
+			dst[k] = v
+		end
+	end
+	return dst
+end
+
+function util.unflatten_table(src, dst)
+	local dst = dst or {}
+	for k, v in pairs(src) do
+		local t = dst
+		local prev
+		for curr in (k .. '.'):gmatch('(.-)%.') do
+			if prev then
+				t[prev] = t[prev] or {}
+				t = t[prev]
+			end
+			prev = curr
+		end
+		t[prev] = v
+	end
+	return dst
+end
+
 function util.str_seek_prev_char(str, pos)
 	return util.utf8_seek(str, pos, -1)
 end