1 files changed, 93 insertions, 0 deletions
diff --git a/tex/context/base/core-ctx.lua b/tex/context/base/core-ctx.lua
new file mode 100644
index 000000000..1dad7c2d7
--- /dev/null
+++ b/tex/context/base/core-ctx.lua
@@ -0,0 +1,93 @@
+if not modules then modules = { } end modules ['core-ctx'] = {
+    version   = 1.001,
+    comment   = "companion to core-ctx.mkiv",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files"
+}
+
+local trace_prepfiles = false  trackers.register("resolvers.prepfiles", function(v) trace_prepfiles = v end)
+
+commands = commands or { }
+
+local list, suffix, islocal, found = { }, "prep", false, false
+
+function commands.loadctxpreplist()
+    local ctlname = file.replacesuffix(tex.jobname,"ctl")
+    if lfs.isfile(ctlname) then
+        local x = xml.load(ctlname)
+        if x then
+            islocal = xml.found(x,"ctx:preplist[@local=='yes']")
+--~             if trace_prepfiles then
+                if islocal then
+                    commands.writestatus("systems","loading ctx log file (local)") -- todo: m!systems
+                else
+                    commands.writestatus("systems","loading ctx log file (specified)") -- todo: m!systems
+                end
+--~             end
+            for e in xml.collected(x,"ctx:prepfile") do
+                local name = xml.text(e)
+                if islocal then
+                    name = file.basename(name)
+                end
+                local done = e.at['done'] or 'no'
+                if trace_prepfiles then
+                    commands.writestatus("systems","registering %s -> %s",done)
+                end
+                found = true
+                list[name] = done -- 'yes' or 'no'
+            end
+        end
+    end
+end
+
+-- -- --
+
+local function found(name) -- used in resolve
+    local prepname = name .. "." .. suffix
+    if list[name] and lfs.isfile(prepname) then
+        if trace_prepfiles then
+            commands.writestatus("systems", "preprocessing: using %s",prepname)
+        end
+        return prepname
+    end
+    return false
+end
+
+local function resolve(name) -- used a few times later on
+    local filename = file.collapse_path(name)
+    local prepname = islocal and found(file.basename(name))
+    if prepname then
+        return prepname
+    end
+    prepname = found(filename)
+    if prepname then
+        return prepname
+    end
+    return false
+end
+
+--~ support.doiffileexistelse(name)
+
+local processfile       = commands.processfile
+local doifinputfileelse = commands.doifinputfileelse
+
+function commands.processfile(name,maxreadlevel) -- overloaded
+    local prepname = resolve(name)
+    if prepname then
+        return processfile(prepname,0)
+    end
+    return processfile(name,maxreadlevel)
+end
+
+function commands.doifinputfileelse(name,depth)
+    local prepname = resolve(name)
+    if prepname then
+        return doifinputfileelse(prepname,0)
+    end
+    return doifinputfileelse(name,depth)
+end
+
+function commands.preparedfile(name)
+    return resolve(name) or name
+end