zodiac/lib/render.awk

132 lines
2.6 KiB
Awk

#
# Render a zodiac page
#
BEGIN {
action = "none"
ext = "none"
main = "_main"
helpers_loaded = "no"
layout = ""
}
{
split(FILENAME, parts, ".")
ext = parts[length(parts)]
if (FILENAME == "-") {
action = "config"
} else if (ext == "meta") {
action = "meta"
} else if (ext == "layout") {
action = "layout"
} else {
action = "page"
filter_ext = ext
}
}
# Process lines from meta files
action == "meta" {
split($0, kv, ": ")
data[kv[1]] = kv[2]
next
}
# Done processing meta
# Since data is loaded now, load the helpers
action != "meta" && action != "config" && helpers_loaded == "no" && helpers == "yes" {
load_helpers()
helpers_loaded = "yes"
}
# Process lines from the page
action == "page" {
if (!contents[main]) {
contents[main] = bind_data($0)
# save the extension for this content type
# to find the appropriate filter to render it
filter_exts[main] = ext
} else {
contents[main] = contents[main] "\n" bind_data($0)
}
next
}
# Process lines from the layout
action == "layout" {
# replace yield with rendered content
if (match($0, /{{{yield}}}/)) {
sub(/{{{yield}}}/, render_content(main))
}
if (layout == "") {
layout = bind_data($0)
} else {
layout = layout "\n" bind_data($0)
}
}
END {
if (layout != "") {
print layout
} else {
print render_content(main)
}
}
function bind_data(txt, tag, key) {
if (match(txt, /{{([^}]*)}}/)) {
tag = substr(txt, RSTART, RLENGTH)
match(tag, /([[:alnum:]_]|[?]).*[^}]/)
key = substr(tag, RSTART, RLENGTH)
gsub(tag, data[key], txt)
return bind_data(txt, data)
} else {
return txt
}
}
function render_content(type, ext_key, filter_ext, filter_cmd, txt) {
ext_key = type "_ext"
# Get the extension of the content type
filter_ext = filter_exts[type]
# Get the appropriate filter command for this extension
filter_cmd = filter[filter_ext]
# Get the text of the content for the given type
txt = contents[type]
if (filter_cmd != "none") {
return run_filter(filter_cmd, txt)
} else {
return txt
}
}
function run_filter(cmd, txt, rand_date, tmpfile, rendered_txt, date_cmd, filter_cmd, line) {
date_cmd = "date +%Y%m%d%H%M%S"
date_cmd | getline rand_date
close(date_cmd)
tmpfile = "/tmp/awk_render" rand_date
filter_cmd = cmd " > " tmpfile
# pipe content to filter command
print txt | filter_cmd
close(filter_cmd)
# pull out the filtered page
while((getline line < tmpfile) > 0) {
rendered_txt = rendered_txt "\n" line
}
close(tmpfile)
system("rm " tmpfile)
return rendered_txt
}