automate blog post generation

Generates a blog post under ./doc/log/archive/$year/$month/$timestamp.
It'll come in handy when writing random short thoughts.

doc/log/index.rst

@@ -8,3 +8,9 @@ Unfinished thoughts, unfinished projects.
 	:maxdepth: 1
 
 	*/index
+
+.. toctree::
+	:glob:
+	:maxdepth: 1
+
+	*/*/*/*/index

gen_blogpost.sh

@@ -0,0 +1,46 @@
+#!/bin/sh
+
+set -eu
+
+timestamp="$(date '+%s')"
+title="$(date '+%Y-%m-%d %H:%M' --date="@$timestamp")"
+year="$(date '+%Y')"
+month="$(date '+%m')"
+
+archive=./doc/log/archive
+
+for dir in "$archive" "$archive/$year" "$archive/$year/$month"; do
+	if [ ! -d "$dir" ]; then
+		mkdir -- "$dir"
+		name="$(basename -- "$dir")"
+		if [ "$name" = archive ]; then
+			name=Archive
+		fi
+		<<-EOF cat - >"$dir/index.rst"
+			$name
+			$(printf '%s\n' "$name" | sed -E 's|.|=|g')
+
+			.. toctree::
+				$(printf '\t'):glob:
+				$(printf '\t'):maxdepth: 1
+
+				$(printf '\t')*/index
+		EOF
+	fi
+done
+
+mkdir -- "$archive/$year/$month/$timestamp"
+
+
+<<-EOF cat - >"$archive/$year/$month/$timestamp/index.rst"
+	$title
+	$(printf '%s\n' "$title" | sed -E 's|.|=|g')
+
+	.. contents::
+
+	TODO
+	----
+EOF
+
+printf '%s\n' "$archive/$year/$month/$timestamp"
+exit 0