From 24460c250816e9b1dc06c5348f4c470bc98f7153 Mon Sep 17 00:00:00 2001
From: Robert Günzler <r@gnzler.io>
Date: Mon, 28 Oct 2024 12:15:35 +0100
Subject: renmae front.lua to preproc.lua
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Signed-off-by: Robert Günzler <r@gnzler.io>
---
 front.lua   | 42 ------------------------------------------
 makefile    |  5 +++--
 preproc.lua | 40 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 43 insertions(+), 44 deletions(-)
 delete mode 100644 front.lua
 create mode 100644 preproc.lua

diff --git a/front.lua b/front.lua
deleted file mode 100644
index a6046b1..0000000
--- a/front.lua
+++ /dev/null
@@ -1,42 +0,0 @@
----@diagnostic disable: undefined-global
--- see https://pandoc.org/lua-filters.html
-return {
-    Pandoc = function(doc)
-        local front = {}
-
-        local toc = pandoc.structure.table_of_contents(doc)
-        if doc.meta.toc and toc then
-            table.insert(front, pandoc.RawBlock("html5", '<section class="table-of-contents">'))
-            table.insert(front, pandoc.RawBlock("html5", '<nav class="capital">'))
-            table.insert(front, pandoc.RawBlock("html5", "<ol>"))
-            -- insert jump to top
-            table.insert(front, pandoc.Link("back to top", "#top"))
-            -- create custom toc
-            toc:walk({
-                Link = function(e)
-                    table.insert(front, pandoc.RawBlock("html5", "<li>"))
-                    table.insert(front, e)
-                    table.insert(front, pandoc.RawBlock("html5", "</li>"))
-                end,
-            })
-            table.insert(front, pandoc.RawBlock("html5", "</ol>"))
-            table.insert(front, pandoc.RawBlock("html5", "</nav>"))
-            table.insert(front, pandoc.RawBlock("html5", "</section>"))
-        end
-
-        -- insert date blocks
-        if doc.meta.date then
-            table.insert(front, pandoc.RawBlock("html5", '<span class="date">'))
-            table.insert(front, doc.meta.date)
-            table.insert(front, pandoc.RawBlock("html5", "</span>"))
-        end
-
-        -- prepend front stuffs
-        for i = #front, 1, -1 do
-            table.insert(doc.blocks, 1, front[i])
-        end
-
-        -- return finished ast
-        return doc
-    end,
-}
diff --git a/makefile b/makefile
index 6d448b0..838a275 100644
--- a/makefile
+++ b/makefile
@@ -2,15 +2,16 @@ all: run
 
 # content
 PANDOC  ?= pandoc
+PANDOC_PREPROC ?= preproc.lua
 htm_SRC := $(shell find src/inc/ -name '*.htm' -print)
 md_SRC  := $(shell find src/inc/ -name '*.md' -print)
 SRC     := $(htm_SRC) $(md_SRC:%.md=%.htm)
 DST     := site
 
 # see https://pandoc.org/MANUAL.html#pandocs-markdown
-%.htm: %.md front.lua
+%.htm: %.md $(PANDOC_PREPROC)
 	@ echo "<!-- Generated file, you may edit and discard $< :) -->" >$@
-	$(PANDOC) -fmarkdown -thtml5 --lua-filter=front.lua $< >>$@
+	$(PANDOC) -fmarkdown -thtml5 --lua-filter=$(PANDOC_PREPROC) $< >>$@
 
 # generator
 ZIG     ?= zig
diff --git a/preproc.lua b/preproc.lua
new file mode 100644
index 0000000..6bfa8c5
--- /dev/null
+++ b/preproc.lua
@@ -0,0 +1,40 @@
+---@diagnostic disable: undefined-global
+-- see https://pandoc.org/lua-filters.html
+return {
+    Pandoc = function(doc)
+        local front = {}
+
+        local toc = pandoc.structure.table_of_contents(doc)
+        if doc.meta.toc and toc then
+            table.insert(front, pandoc.RawBlock("html5", '<nav class="table-of-contents capital">'))
+            table.insert(front, pandoc.RawBlock("html5", "<ol>"))
+            -- insert jump to top
+            table.insert(front, pandoc.Link("back to top", "#top"))
+            -- create custom toc
+            toc:walk({
+                Link = function(e)
+                    table.insert(front, pandoc.RawBlock("html5", "<li>"))
+                    table.insert(front, e)
+                    table.insert(front, pandoc.RawBlock("html5", "</li>"))
+                end,
+            })
+            table.insert(front, pandoc.RawBlock("html5", "</ol>"))
+            table.insert(front, pandoc.RawBlock("html5", "</nav>"))
+        end
+
+        -- insert date blocks
+        if doc.meta.date then
+            table.insert(front, pandoc.RawBlock("html5", '<span class="date">'))
+            table.insert(front, doc.meta.date)
+            table.insert(front, pandoc.RawBlock("html5", "</span>"))
+        end
+
+        -- prepend front stuffs
+        for i = #front, 1, -1 do
+            table.insert(doc.blocks, 1, front[i])
+        end
+
+        -- return finished ast
+        return doc
+    end,
+}
-- 
cgit 1.4.1