Implemented a very specific generate-index script for the blog

1 files changed, 77 insertions, 0 deletions

diff --git a/generate-index.lua b/generate-index.lua
new file mode 100755
index 0000000..65f7e14
--- /dev/null
+++ b/generate-index.lua
@@ -0,0 +1,77 @@
+#!/usr/bin/env lua
+local pretty = require"pl.pretty"
+local dir = require"pl.dir"
+local gumbo = require"gumbo"
+local months = {
+	"January",
+	"February",
+	"March",
+	"April",
+	"May",
+	"June",
+	"July",
+	"August",
+	"September",
+	"October",
+	"November",
+	"December",
+}
+
+
+local function parse (stamp)
+	local year, month, day = stamp:match"(%d+)-(%d?%d)-(%d?%d)T?"
+	year, month, day = tonumber(year), tonumber(month), tonumber(day)
+	if not year or not month or not day then
+		return nil
+	end
+	return {year=year, month=month, day=day}
+end
+
+
+local function describe (date)
+	return string.format("%d %s", date.day, months[date.month])
+end
+
+
+local pages = dir.getfiles(".", "*.html")
+local takeaways = {
+	["published-on"] = "published",
+	["last-modified-on"] = "modified",
+}
+local excludes = {
+	["index.html"] = true,
+	["graveyard_of_the_drawings.html"] = true,
+	["plop.html"] = true,
+}
+local posts = {}
+for _, filename in pairs(pages) do
+	local document = gumbo.parseFile(filename)
+	local metas = document:getElementsByTagName"meta"
+	local properties = {title=document.title, filename=filename:sub(3), published=""}
+	for _, meta in ipairs(metas) do
+		local take = nil
+		for _, attribute in ipairs(meta.attributes) do
+			if attribute.name == "name" then
+				take = takeaways[attribute.value]
+			end
+			if take and attribute.name == "content" then
+				properties[take] = attribute.value
+			end
+		end
+	end
+	if properties.filename:match"^[^_]" and not excludes[properties.filename] then
+		table.insert(posts, properties)
+	end
+end
+table.sort(posts, function (lhs, rhs) return lhs.published > rhs.published end)
+print("<table>")
+local year = nil
+for _, page in pairs(posts) do
+	local date = parse(page.published)
+	if date and year ~= date.year then
+		year = date.year
+		print(string.format("<tr><td><b>%d</b><td><td>", year))
+	end
+	print(string.format([[<tr><td>%s<td class="sep">•<td><a href="%s">%s</a>]], describe(date), page.filename, page.title))
+end
+print("</table>")