105 lines
2.0 KiB
Awk
105 lines
2.0 KiB
Awk
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# render.awk - Awk-based templating
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BEGIN {
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action = "none"
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helpers_loaded = "no"
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content = ""
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layout = ""
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}
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{
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action = action_from_filetype(FILENAME)
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}
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# Process lines from meta files
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action == "meta" {
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split($0, kv, ": ")
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data[kv[1]] = kv[2]
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next
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}
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# Done processing meta
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# Since data is loaded now, load the helpers
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action != "meta" && helpers_loaded == "no" && helpers == "yes" {
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load_helpers()
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helpers_loaded = "yes"
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}
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# Process lines from the page
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action == "page" {
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if (content == "") {
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content = bind_data($0)
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} else {
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content = content "\n" bind_data($0)
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}
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next
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}
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# Process lines from the layout
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action == "layout" {
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# replace yield with rendered content
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if (match($0, /{{{yield}}}/)) {
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sub(/{{{yield}}}/, render_content(content))
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}
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if (layout == "") {
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layout = bind_data($0)
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} else {
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layout = layout "\n" bind_data($0)
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}
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}
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END {
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if (layout != "") {
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print layout
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} else {
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print render_content(content)
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}
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}
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function action_from_filetype(filename) {
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if (match(filename, /\.meta/)) return "meta"
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if (match(filename, /\.layout/)) return "layout"
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if (match(filename, /\.md/)) return "page"
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}
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function bind_data(txt, tag, key) {
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if (match(txt, /{{([^}]*)}}/)) {
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tag = substr(txt, RSTART, RLENGTH)
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match(tag, /(\w|[?]).*[^}]/)
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key = substr(tag, RSTART, RLENGTH)
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gsub(tag, data[key], txt)
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return bind_data(txt, data)
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} else {
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return txt
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}
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}
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function render_content(txt) {
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return markdown(txt)
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}
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function markdown(txt, rand_date, tmpfile, rendered_txt, date_cmd, markdown_cmd, line) {
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date_cmd = "date +%Y%m%d%H%M%S"
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date_cmd | getline rand_date
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close(date_cmd)
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tmpfile = "/tmp/render" rand_date
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markdown_cmd = "awk -f " AWKLIB "/markdown.awk > " tmpfile
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# pipe content to markdown.awk
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print txt | markdown_cmd
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close(markdown_cmd)
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# pull out the filtered page
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while((getline line < tmpfile) > 0) {
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rendered_txt = rendered_txt "\n" line
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}
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close(tmpfile)
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system("rm " tmpfile)
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return rendered_txt
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}
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