From f8ecf87bc560f5ac0fc1eeb97537dfc76daad9de Mon Sep 17 00:00:00 2001
From: s-ol <s-ol@users.noreply.github.com>
Date: Wed, 7 Nov 2018 16:22:50 +1100
Subject: add $order mechanism

---
 mmm/mmmfs/fs.server.moon | 22 +++++++++++++++++++++-
 root/$order              |  4 ++++
 2 files changed, 25 insertions(+), 1 deletion(-)
 create mode 100644 root/$order

diff --git a/mmm/mmmfs/fs.server.moon b/mmm/mmmfs/fs.server.moon
index 5b0d45d..a1f5293 100644
--- a/mmm/mmmfs/fs.server.moon
+++ b/mmm/mmmfs/fs.server.moon
@@ -1,4 +1,5 @@
 import Fileder from require 'mmm.mmmfs.fileder'
+import opairs from require 'mmm.ordered'
 require 'lfs'
 
 readfile = (name) ->
@@ -21,20 +22,39 @@ load_fileder = (path='root/', name='') ->
   path ..= '/' unless '/' == path\sub -1
 
   with Fileder 'name: alpha': name
+    order = nil
+    children = {}
+
     for entry in lfs.dir path
       continue if entry == '.' or entry == '..'
       continue if entry == 'init.moon'
 
+      if entry == '$order'
+        order = [line for line in io.lines path .. entry]
+        continue
+
       attr = lfs.attributes path .. entry
       switch attr.mode
         when 'file'
           key, value = load_property path, entry
           .props[key] = value
         when 'directory'
-          table.insert .children, load_fileder path, entry
+          children[entry] = load_fileder path, entry
         else
           error "unknown file type: #{attr.mode}"
 
+    if order
+      -- order from order file
+      for i, name in pairs order
+        child = assert children[name], "child in $order but not fs: #{name} of #{path}"
+        table.insert .children, child
+        children[name] = nil
+
+    -- sort remainder alphabeticalally
+    for name, child in opairs children
+      table.insert .children, child
+      warn "child #{name} of #{path} not in $order!" if order
+
 {
   :load_property
   :load_fileder
diff --git a/root/$order b/root/$order
new file mode 100644
index 0000000..eda69e3
--- /dev/null
+++ b/root/$order
@@ -0,0 +1,4 @@
+articles
+experiments
+animations
+meta
-- 
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