From 8fe5387c47196d09063e12ca6b9ad768ad4849b0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Romain=20Gon=C3=A7alves?= <me@rgoncalves.se>
Date: Mon, 27 Sep 2021 15:08:34 +0200
Subject: all: Bump to version 3 of static site generation

---
 bin/func | 187 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 187 insertions(+)
 create mode 100644 bin/func

(limited to 'bin/func')

diff --git a/bin/func b/bin/func
new file mode 100644
index 0000000..af81d92
--- /dev/null
+++ b/bin/func
@@ -0,0 +1,187 @@
+#!/bin/sh
+
+media_dir="media"
+src_dir="src"
+tmp_dir="tmp"
+out_dir="out"
+
+tmp_file="${tmp_dir}/tmp"
+
+__get_value() {
+	# 1: filename
+	# 2: Attribute name
+	# Retrieve and return the key/value of a lowdown source file.
+	lowdown -T ms -X "${2}" "${1}" 2>/dev/null
+}
+
+__get_value_title() {
+	# 1: filename
+	# Get the title of a file and return a safe string.
+	local _title
+
+	_title="$(__get_value ${1} title || true)"
+	if [ "${_title}" = "" ]; then
+		_title="$(basename ${1} |
+			rev |
+			cut -d "." -f 2 |
+			rev |
+			sed 's/-/ /g')"
+	fi
+
+	echo "${_title}"
+}
+
+__get_value_date() {
+	# 1: filename
+	# Get the date of a file and return a safe string.
+	local _date
+
+	_date="$(__get_value ${1} date || true)"
+	if [ "${_date}" = "" ]; then
+		_date="1970-01-01"
+	fi
+
+	echo "${_date}"
+}
+
+__get_value_date_human() {
+	# 1: filename
+	# Get a human readable date from a file and return a safe string.
+	__get_value_date "${1}" | xargs date -j -f "%Y-%m-%d" +"%B %d, %Y"
+}
+
+__get_out_filename() {
+	# 1: filename
+	# Convert the source filename to its output destination.
+	local _filename
+
+	_filename="${1}"
+
+	if $(__get_value "${1}" draft || false); then
+		_filename="$(dirname ${1})/$(basename ${1} | sha256).html"
+	fi
+	
+	echo "${_filename}" |
+		sed 's/.md$/.html/g' |
+		sed "s/${src_dir}/${out_dir}/g"
+}
+
+__get_final_filename() {
+	# 1: filename
+	# Convert the source filename to its final filename for a webserver.
+	__get_out_filename "${1}" | cut -d "/" -f 2-
+}
+
+__list_files() {
+	# 1: directory
+	# List all regular files in a directory and its subdirectories.
+	find "${1}" -type f
+}
+
+__list_files_date() {
+	# 1: directory
+	local _files
+	local _file
+	local _tmp_file
+	
+	_files=$(__list_files "${1}")
+	_tmp_file="${tmp_file}.list_files_date"
+
+	cp /dev/null "${_tmp_file}"
+
+	for _file in ${_files}; do
+		echo "$(__get_value_date ${_file})" "${_file}" >> "${_tmp_file}"
+	done
+
+	sort -r "${_tmp_file}" | cut -d " " -f 2-
+}
+
+__install() {
+	# 1: filename
+	# Copy a file to the output directory.
+	install -D -m 0644 "${1}" "${2}"
+}
+
+__lowdown() {
+	# Output a file to html
+	lowdown --html-no-skiphtml --html-no-escapehtml "${1}"
+}
+
+__apply_template() {
+	# 1: template name or default
+	m4 "templates/${1:-default}"
+}
+
+__generate_index_line() {
+	# 1: filename where index will be displayed
+	# 2: filename contained in line
+	local _show_date
+
+	_show_date="$(__get_value ${1} index_date || echo false)"
+
+	if "${_show_date}"; then
+		cat <<-EOF
+		<span>
+		$(__get_value_date_human ${2})
+		</span>
+		EOF
+	fi
+
+	cat <<-EOF
+	<a href="$(__get_final_filename ${2})">
+	$(__get_value_title ${2})
+	</a>
+	EOF
+}
+
+__generate_index() {
+	# 1: filename
+	# Generate and output to stdout the index of a file.
+	local _file
+	local _index_dir
+
+	_index_dir="${src_dir}/$(__get_value "${1}" index)"
+	[ -f "${_index_dir}" ] && _index_dir=$(dirname "${_index_dir}")
+	[ ! -d "${_index_dir}" ] && return
+
+	echo "<ul class=\"index\">"
+
+	for _file in $(__list_files_date "${_index_dir}"); do
+		[ "${1}" = "${_file}" ] && continue
+		__get_value "${_file}" "draft" >/dev/null && continue
+
+		echo "<li>"
+		__generate_index_line "${1}" "${_file}"
+		echo "</li>"
+	done
+
+	echo "</ul>"
+}
+
+__handle_md() {
+	# 1: filename
+	# Handle markdown files.
+	__lowdown "${1}" > "${tmp_file}.body"
+
+	if [ ! "$(__get_value ${1} index)" = "" ]; then
+		__generate_index "${1}" > "${tmp_file}.index"
+	else
+		[ -f "${tmp_file}.index" ] && rm "${tmp_file}.index"
+	fi
+
+	__apply_template "$(__get_value ${1} template)" > "${tmp_file}"
+	__install "${tmp_file}" "$(__get_out_filename ${1})"
+}
+
+__handle() {
+	# 1: filename
+	# Handle file depending on its filename and filetype.
+	case "${1}" in
+		*.md)
+			__handle_md "${1}"
+			;;
+		*)
+			__install "${1}" "$(__get_out_filename ${1})"
+			;;
+	esac
+}
-- 
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