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#
# == About ==
#
# Every page has a description and og:description meta tags. These descriptions are
# generated from the text inside paragraphs of the current page.
# The value for those meta tags is "[DESCRIPTION]" and it gets replaced with
# either all of the text on the page, or only the first 200 characters.
function appToDesc(l) {
gsub(/<[^>]*>/, "", l) ; gsub("’", "'", l)
gsub(/[^a-zA-Z0-9 '.]/, "", l)
gsub(/^[ \t]*/, "", l) ; gsub(/[ \t]*$/, "", l)
desc = desc l
if (length(desc) >= 200) {
desc = substr(desc, 1, 197) "..."
return 1
}
return 0
}
BEGIN {
stop = 0
# Loop over the whole file, extract all text in first couple of paragraphs,
# store it in desc (but no more than 200 characters will be saved)
while(stop == 0 && getline < ARGV[1]) {
if (index($0, "<p") > 0)
stop = appToDesc($0)
}
close(ARGV[1]) # FILENAME isn't set during BEGIN
}
"\\[DESCRIPTION\\]" {
gsub("\\[DESCRIPTION\\]", desc)
}
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