1 files changed, 46 insertions, 0 deletions
diff --git a/tex/context/base/file-syn.lua b/tex/context/base/file-syn.lua
new file mode 100644
index 000000000..df431f49b
--- /dev/null
+++ b/tex/context/base/file-syn.lua
@@ -0,0 +1,46 @@
+if not modules then modules = { } end modules ['file-syn'] = {
+    version   = 1.001,
+    comment   = "companion to file-syn.mkvi",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files"
+}
+
+local report_files = logs.reporter("files")
+
+environment.filesynonyms = environment.filesynonyms or { }
+local filesynonyms       = environment.filesynonyms
+
+storage.register("environment/filesynonyms", filesynonyms, "environment.filesynonyms")
+
+local function truefilename(name)
+    local realname = filesynonyms[name] or name
+    if realname ~= name then
+        return truefilename(realname)
+    else
+        return realname
+    end
+end
+
+function commands.truefilename(name)
+    context(truefilename(name))
+end
+
+function commands.definefilesynonym(name,realname)
+    local synonym = filesynonyms[name]
+    if synonym then
+        interfaces.showmessage("files",1,name,realname,synonym)
+    end
+    filesynonyms[name] = realname
+end
+
+function commands.definefilefallback(name,alternatives)
+    local names = utilities.parser.settings_to_array(alternatives)
+    for i=1,#names do
+        local realname = resolvers.findfile(names[i])
+        if realname ~= "" then
+            filesynonyms[name] = realname
+            break
+        end
+    end
+end