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..90cd4cb3b
--- /dev/null
+++ b/tex/context/base/core-ctx.lua
@@ -0,0 +1,93 @@
+if not modules then modules = { } end modules ['supp-fil'] = {
+    version   = 1.001,
+    comment   = "companion to supp-fil.tex",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files"
+}
+
+commands                   = commands or { }
+commands.trace_prepfiles   = false
+
+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 commands.trace_prepfiles then
+                if islocal then
+                    ctx.writestatus("systems","loading ctx log file (local)") -- todo: m!systems
+                else
+                    ctx.writestatus("systems","loading ctx log file (specified)") -- todo: m!systems
+                end
+            end
+            for r, d, k in xml.elements(x,"ctx:prepfile") do
+                local dk = d[k]
+                local name = xml.content(dk)
+                if islocal then
+                    name = file.basename(name)
+                end
+                local done = dk.at['done'] or 'no'
+                if commands.trace_prepfiles then
+                    ctx.writestatus("systems","registering %s -> %s",done)
+                end
+                found = true
+                list[name] = done -- 'yes' or 'no'
+            end
+        end
+    end
+end
+
+local function resolve(name)
+    local function found(name)
+        local prepname = name .. "." .. suffix
+        local done = list[name]
+        if done then
+            if lfs.isfile(prepname) then
+                if commands.trace_prepfiles then
+                    ctx.writestatus("systems", "preprocessing: using %s",prepname)
+                end
+                return prepname
+            end
+        end
+        return false
+    end
+    local filename = file.collapse_path(name)
+    local prepname = islocal and found(file.basename(name))
+    if prepname then
+        return prepname
+    end
+    local 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,depth)
+    local prepname = found and resolve(name)
+    if prepname then
+        return processfile(prepname,0)
+    end
+    return processfile(name,depth)
+end
+
+function commands.doifinputfileelse(name,depth)
+    local prepname = found and resolve(name)
+    if prepname then
+        return doifinputfileelse(prepname,0)
+    end
+    return doifinputfileelse(name,depth)
+end
+
+function commands.preparedfile(name)
+    return (found and resolve(name)) or name
+end