format preproc script and add comment

Signed-off-by: Robert Günzler <r@gnzler.io>

1 files changed, 50 insertions, 39 deletions

diff --git a/preproc.lua b/preproc.lua
index 7be9a48..e9aa366 100644
--- a/preproc.lua
+++ b/preproc.lua
@@ -1,47 +1,58 @@
 ---@diagnostic disable: undefined-global
 -- see https://pandoc.org/lua-filters.html
 return {
-    Link = function(link)
-        -- set target="_blank" for outgoing links (open them in new tab)
-        if string.match(link.target, "gzr.im") == nil then
-            table.insert(link.attributes, { "target", "_blank" })
-        end
-        return link
-    end,
-    Pandoc = function(doc)
-        local front = {}
+	Link = function(link)
+		-- set target="_blank" for outgoing links (open them in new tab)
+		if string.match(link.target, "gzr.im") == nil then
+			table.insert(link.attributes, { "target", "_blank" })
+		end
+		return link
+	end,
+	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
+		-- add a comment
+		table.insert(
+			front,
+			pandoc.RawBlock(
+				"html5",
+				"<!-- Generated file, you may edit and discard "
+					.. pandoc.path.filename(PANDOC_STATE.input_files[1])
+					.. " :) -->"
+			)
+		)
 
-        -- 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
+		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
 
-        -- prepend front stuffs
-        for i = #front, 1, -1 do
-            table.insert(doc.blocks, 1, front[i])
-        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
 
-        -- return finished ast
-        return doc
-    end,
+		-- prepend front stuffs
+		for i = #front, 1, -1 do
+			table.insert(doc.blocks, 1, front[i])
+		end
+
+		-- return finished ast
+		return doc
+	end,
 }