1 files changed, 73 insertions, 0 deletions
diff --git a/tex/context/base/mkiv/data-tmf.lua b/tex/context/base/mkiv/data-tmf.lua
new file mode 100644
index 000000000..e0ccac257
--- /dev/null
+++ b/tex/context/base/mkiv/data-tmf.lua
@@ -0,0 +1,73 @@
+if not modules then modules = { } end modules ['data-tmf'] = {
+    version   = 1.001,
+    comment   = "companion to luat-lib.mkiv",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files"
+}
+
+local resolvers  = resolvers
+
+local report_tds = logs.reporter("resolvers","tds")
+
+--  =  <<
+--  ?  ??
+--  <  +=
+--  >  =+
+
+function resolvers.load_tree(tree,resolve)
+    if type(tree) == "string" and tree ~= "" then
+
+        local getenv, setenv = resolvers.getenv, resolvers.setenv
+
+        -- later might listen to the raw osenv var as well
+        local texos   = "texmf-" .. os.platform
+
+        local oldroot = environment.texroot
+        local newroot = file.collapsepath(tree)
+
+        local newtree = file.join(newroot,texos)
+        local newpath = file.join(newtree,"bin")
+
+        if not lfs.isdir(newtree) then
+            report_tds("no %a under tree %a",texos,tree)
+            os.exit()
+        end
+        if not lfs.isdir(newpath) then
+            report_tds("no '%s/bin' under tree %a",texos,tree)
+            os.exit()
+        end
+
+        local texmfos = newtree
+
+        environment.texroot = newroot
+        environment.texos   = texos
+        environment.texmfos = texmfos
+
+        -- Beware, we need to obey the relocatable autoparent so we
+        -- set TEXMFCNF to its raw value. This is somewhat tricky when
+        -- we run a mkii job from within. Therefore, in mtxrun, there
+        -- is a resolve applied when we're in mkii/kpse mode or when
+        -- --resolve is passed to mtxrun. Maybe we should also set the
+        -- local AUTOPARENT etc. although these are alwasy set new.
+
+        if resolve then
+         -- resolvers.luacnfspec = resolvers.joinpath(resolvers.resolve(resolvers.expandedpathfromlist(resolvers.splitpath(resolvers.luacnfspec))))
+            resolvers.luacnfspec = resolvers.resolve(resolvers.luacnfspec)
+        end
+
+        setenv('SELFAUTOPARENT', newroot)
+        setenv('SELFAUTODIR',    newtree)
+        setenv('SELFAUTOLOC',    newpath)
+        setenv('TEXROOT',        newroot)
+        setenv('TEXOS',          texos)
+        setenv('TEXMFOS',        texmfos)
+        setenv('TEXMFCNF',       resolvers.luacnfspec,true) -- already resolved
+        setenv('PATH',           newpath .. io.pathseparator .. getenv('PATH'))
+
+        report_tds("changing from root %a to %a",oldroot,newroot)
+        report_tds("prepending %a to PATH",newpath)
+        report_tds("setting TEXMFCNF to %a",resolvers.luacnfspec)
+        report_tds()
+    end
+end