create $TEXMFVAR if missing

2 files changed, 30 insertions, 0 deletions

diff --git a/luaotfload-tool.lua b/luaotfload-tool.lua
index 0d3b229..2c525d9 100755
--- a/luaotfload-tool.lua
+++ b/luaotfload-tool.lua
@@ -90,6 +90,19 @@ config.lualibs.load_extended    = false
 
 require"lualibs"
 
+--- prepare directories: the cache function in Luatex-Fonts
+--- checks for writable directory only on startup, so everything
+--- has to be laid out before we load basics-gen
+
+local cachepath = kpse.expand_var"$TEXMFVAR"
+if not lfs.isdir(cachepath) then
+    dir.mkdirs(cachepath)
+    if not lfs.isdir(cachepath) then
+        texiowrite(stringformat(
+            "ERROR could not create directory %s", cachepath))
+    end
+end
+
 --[[doc--
 \fileent{luatex-basics-gen.lua} calls functions from the
 \luafunction{texio.*} library; too much for our taste.
diff --git a/luaotfload.dtx b/luaotfload.dtx
index daaa48c..0d062a6 100644
--- a/luaotfload.dtx
+++ b/luaotfload.dtx
@@ -1290,6 +1290,23 @@ if tex.luatexversion < luatex_version then
 end
 
 %    \end{macrocode}
+%   Prepare directories: the cache function in Luatex-Fonts checks for a
+%   writable directory only once during startup. If there is no
+%   \fileent{texmf-var} at this time it will create a subdirectory
+%   \fileent{./luatex-cache} instead.
+%   Thus everything has to be laid out before we load the fontloader.
+%
+%    \begin{macrocode}
+
+local cachepath = kpse.expand_var"$TEXMFVAR"
+if not lfs.isdir(cachepath) then
+    dir.mkdirs(cachepath)
+    if not lfs.isdir(cachepath) then
+        error( "ERROR could not create directory %s", cachepath)
+    end
+end
+
+%    \end{macrocode}
 % \subsection{Module loading}
 % We load the files imported from \CONTEXT with this function.
 % It automatically prepends the prefix \fileent{luaotfload-} to its