bin: Generation scaffold

2 files changed, 279 insertions, 0 deletions

diff --git a/bin/ssg b/bin/ssg
new file mode 100755
index 0000000..f47f819
--- /dev/null
+++ b/bin/ssg
@@ -0,0 +1,113 @@
+#!/bin/sh
+
+TEMPLATE="templates/default.html"
+STATIC_DIRS="style img"
+TMP_FILE=".tmp"
+SRC="src"
+OUT="out"
+#BASE_URL=""
+
+. ./bin/ssg-template
+
+_log() {
+	echo [${0}] $@
+}
+
+_to_html() {
+	# 1: filename
+	# stdout: content
+	lowdown --html-no-skiphtml --html-no-escapehtml "${1}"
+}
+
+_install() {
+	# 1: filename
+	install -D "${TMP_FILE}" $(_get_out_path "${1}")
+}
+
+_template_heredoc() {
+	echo ". ${PWD}/bin/ssg-template" > "tmp/heredoc"
+	echo "cat <<EOF_TEMPLATE" >> "tmp/heredoc"
+	cat "${1}" >> "tmp/heredoc"
+	echo EOF_TEMPLATE >> "tmp/heredoc"
+
+	sh "tmp/heredoc" "${1}" > "${TMP_FILE}"
+	_to_html "${TMP_FILE}" > "${2}"
+}
+
+_convert_urls() {
+	# file url
+	if ! echo "${2}" | grep "^http" >/dev/null; then
+		sed -i "s@href=/@href=$2/@g" "${1}"
+	fi
+	sed -i "s@<a[^>]* href=\"[/^\"]*/@<a href=\"$2/@g" "${1}"
+	sed -i "s@<link[^>]* href=\"[/^\"]*/@<link href=\"$2/@g" "${1}"
+	sed -i "s@<img[^>]* src=\"[/^\"]*/@<img src=\"$2/@g" "${1}"
+}
+
+
+main() {
+	local file
+
+	# template files
+	for template in header footer; do
+		_log "> ${template}"
+		_to_html "templates/${template}.md" > "${TMP_FILE}"
+		install -D "${TMP_FILE}" "tmp/${template}.html"
+	done
+
+	# markdown files
+	for file in $(find "${SRC}" -iname "*.md"); do
+		if [ "${file}" -ot $(_get_out_path "${file}") ]; then
+			_log "! ${file}"
+			continue
+		fi
+
+		_log "> ${file}"
+
+		# Metadata
+		_cleanup_tmp_file "tmp/metadata.html"
+		_render_metadata "${file}" > "tmp/metadata.html"
+
+		# Table of content
+		_cleanup_tmp_file "tmp/toc.html"
+		if [ $(_get_value "${file}" "toc") ]; then
+			_render_toc "${file}" > "tmp/toc.html"
+		fi
+
+		# Index of directory
+		_cleanup_tmp_file "tmp/index.html"
+		if [ $(_get_value "${file}" "index") ]; then
+			_render_index "${file}" > "tmp/index.html"
+		fi
+
+		# Render body content
+		_to_html "${file}" > "tmp/body.html"
+
+		# Erase body content with templating
+		if basename "${file}" | grep "^_"; then
+			_template_heredoc "${file}" "tmp/body.html"
+		fi
+
+		# Concatenate temporary files to final page
+		m4 templates/default.html > "${TMP_FILE}"
+		install -D "${TMP_FILE}" $(_get_out_path "${file}")
+	done
+
+	# html files
+	for file in $(find "${SRC}" -iname "*.html"); do
+		_log "> ${file}"
+		_install "${file}"
+	done
+
+	# convert urls
+	for file in $(find "${OUT}" -iname "*.html"); do
+		_convert_urls "${file}" "${BASE_URL}"
+	done
+
+	for dir in ${STATIC_DIRS}; do
+		_log "> ${dir}/"
+		cp -R "src/${dir}" "out/${dir}"
+	done
+}
+
+main
diff --git a/bin/ssg-template b/bin/ssg-template
new file mode 100644
index 0000000..d246028
--- /dev/null
+++ b/bin/ssg-template
@@ -0,0 +1,166 @@
+#!/bin/sh
+
+SRC_FILE="${1}"
+
+_echo_ifset() {
+	[ ! -z "${1}" ] && echo "${1}"
+}
+
+_get_value() {
+	# 1: filename
+	# 2: key
+	# stdout: value
+	local value=$(lowdown -T ms -X "${2}" "${1}" 2>/dev/null)
+	echo "${value:-${3}}"
+	return "${?}"
+}
+
+_get_value_date() {
+	_get_value "${1}" "${2}" "1970-01-01"
+}
+
+_get_out_path() {
+	# 1: filename
+	# stdout: filename
+	echo "${1}" | sed -e 's/^src/out/g' -e 's/.md$/.html/g' -e 's/_//g'
+}
+
+_get_final_path() {
+	# 1: filename
+	# stdout: filename
+	_get_out_path "${1}" | sed 's/^out\///g'
+}
+
+_get_title() {
+	# 1: filename
+	basename "${1}" | sed 's/\..*//g' | tr - " "
+}
+
+_get_date_human() {
+	# 1: filename
+	date -j -f "%Y-%m-%d" $(_get_value_date ${1} "date") +"%B %d, %Y"
+}
+
+_get_index_files() {
+	# 1: filename
+	local path
+
+	path=$(_get_value "${1}" index)
+	find "src/${path}" -mindepth 1 -maxdepth 1
+}
+
+_sort_index_per_date() {
+	# 1: filename
+	local files
+	local file
+	local date
+
+	for file in $(_get_index_files "${1}"); do
+		date=$(_get_value_date "${file}" "date")
+		files="${files} ${date}@${file}"
+	done
+
+	echo ${files} | tr " " "\n" | sort -rn | cut -d "@" -f 2
+}
+
+_get_filetype() {
+	# 1: filename
+	local filetype
+
+	filetype=$(ls -ld "${1}" | cut -c 1)
+
+	case "${filetype}" in
+		-)
+			filetype="file"
+			;;
+		d)
+			filetype="directory"
+			;;
+	esac
+
+	echo "${filetype}"
+}
+
+_get_chapters() {
+	# 1: filename
+	grep "^#" "${1}" | sed 's/# /#_/g'
+}
+
+_get_chapter_title() {
+	# 1: chapter
+	echo "${1}" | sed -e 's/#_//' -e 's/#//g'
+}
+
+_parse_option() {
+	# 1: metadata
+	# 2: key
+	echo "${metadata}" | grep "^${2}"
+}
+
+_cleanup_tmp_file() {
+	[ -f "${1}" ] && rm "${1}"
+}
+
+_parse_metadata() {
+	# 1: filename
+	sed -n '/^$/q;p' "${file}" | grep "^.*: .*$"
+}
+
+_render_metadata() {
+	# 1: filename
+	# 2: output
+	_ENABLED_METADATA="date author"
+	local key
+	local value
+
+	echo "<ul class=\"metadata\">"
+	for key in ${_ENABLED_METADATA}; do
+		value=$(lowdown -X "${key}" "${1}" 2>/dev/null)
+		[ -z "${value}" ] && continue
+
+		echo "<li>${key}: ${value}</li>"
+	done
+	echo "</ul>"
+}
+
+_render_index() {
+	# 1: filename
+	# 2: out
+	# 3: path
+	local file
+	local path
+	local title
+
+	echo "<ul class=\"index\">"
+	for file in $(_sort_index_per_date "${1}"); do
+		path=$(_get_final_path "${file}")
+		[ "${path}" = "$(_get_final_path ${1})" ] && continue
+
+		title=$(_get_value "${file}" "title" "$(_get_title ${file})")
+
+		cat <<-EOF
+		<li>
+		<a href="${path}">${title}</a>
+		<span>$(_get_date_human "${file}")</span>
+		</li>
+		EOF
+	done
+	echo "</ul>"
+}
+
+_render_toc() {
+	local chapter
+	local chapter_title
+
+	echo "<ul class=\"toc\">"
+	for chapter in $(_get_chapters "${1}"); do
+		chapter_title=$(_get_chapter_title "${chapter}")
+
+		cat <<-EOF
+		<li>
+		<a href=#${chapter_title}>${chapter_title}</a>
+		</li>
+		EOF
+	done
+	echo "</ul>"
+}