texlive-specs-a/luaotfload_varfonts.dif

--- texmf-dist/tex/luatex/luaotfload/luaotfload-legacy-merged.lua
+++ texmf-dist/tex/luatex/luaotfload/luaotfload-legacy-merged.lua	2013-10-28 13:58:12.000000000 +0000
@@ -77,11 +77,34 @@ if not caches.namespace or caches.namesp
 end
 do
   local cachepaths
+  local mktex=kpse.find_file('mktex.cnf','cnf') or ""
   if kpse.expand_var('$TEXMFCACHE')~='$TEXMFCACHE' then
     cachepaths=kpse.expand_var('$TEXMFCACHE')
   elseif kpse.expand_var('$TEXMFVAR')~='$TEXMFVAR' then
     cachepaths=kpse.expand_var('$TEXMFVAR')
   end
+  if mktex~="" then
+    local varfonts="no"
+    local features=io.open(mktex,'r')
+    local cache
+    for line in features:lines() do
+      if string.find(line, 'MT_FEATURES=') then
+       if string.find(line, 'varfonts') then
+         varfonts="yes"
+        end
+        break
+      end
+    end
+    features:close()
+    cache=kpse.expand_var('$VARTEXFONTS')
+    if varfonts=="yes" and cache~="" then
+      if false == file.is_writable(cache) then
+        cachepaths=os.getenv("HOME") .. "/.cache/texmf/fonts"
+      else
+        cachepaths=cache
+      end
+    end
+  end
   if not cachepaths then
     cachepaths="."
   end
--- texmf-dist/tex/luatex/luaotfload/luaotfload-merged.lua
+++ texmf-dist/tex/luatex/luaotfload/luaotfload-merged.lua	2013-10-28 13:52:09.000000000 +0000
@@ -3012,6 +3012,28 @@ if not caches.namespace or caches.namesp
 end
 do
   local cachepaths=kpse.expand_var('$TEXMFCACHE') or ""
+  local mktex=kpse.find_file('mktex.cnf','cnf') or ""
+  if mktex~="" then
+    local varfonts="no"
+    local features=io.open(mktex,'r')
+    for line in features:lines() do
+      if string.find(line, 'MT_FEATURES=') then
+        if string.find(line, 'varfonts') then
+          varfonts="yes"
+        end
+        break
+      end
+    end
+    features:close()
+    cachepaths=kpse.expand_var('$VARTEXFONTS')
+    if varfonts=="yes" and cachepaths~="" then
+      if false == file.is_writable(cachepaths) then
+        cachepaths=os.getenv("HOME") .. "/.cache/texmf/fonts"
+      end
+    else
+      cachepaths=""
+    end
+  end
   if cachepaths=="" then
     cachepaths=kpse.expand_var('$TEXMFVAR') or ""
   end