#
# gmi2html.awk -- AWK script to convert a file from text/gemini to text/html
#
# Copyright (c) 2021 Rodrigo S. Canibano (dracometallium)
# Copyright (c) 2021 Jeremy Potter (jwinnie)
#
# Permission is hereby granted, free of charge, to any person obtaining a copy of this
# software and associated documentation files (the "Software"), to deal in the Software
# without restriction, including without limitation the rights to use, copy, modify,
# merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
# INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
# PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
# usage:
# $ awk -f gmi2html.awk \
# -v title= \
# -v css=<css> \
# -v url=<url> < path/to/gmi > path/to/html
#
# parameters:
# <title>: the title of the document, used in the HTML <title>
# <css>: relative path to a CSS stylesheet
# <url>: URL of the original Gemini document, linked in the footer
# Begin HTML document
BEGIN {
printf "\
<!DOCTYPE html>\
<head>\
<meta charset=\"utf-8\">\
<meta name=\"viewport\" content=\"width=device-width,initial-scale=1\">\
<link rel=\"stylesheet\" type=\"text/css\" href=\"%s\">\
<title>%s\
\
", css, title
pre = 0
list = 0
}
# Escape left and right angle brackets
{
gsub(//, "\\>")
}
# Detect beginning of code block
/^```/ && (pre == 0) {
pre = 1
printf "
"
next
}
# Detect end of code block
/^```/ && (pre == 1) {
pre = 0
printf "
"
next
}
# Output verbatim text inside of code block
(pre == 1) {
print $0
next
}
# Detect list item
/\* / {
# Detect if this is the first item in
# the list. If so, start a new
.
if (list == 0) {
list = 1
printf "
"
}
sub(/\* [ \t]*/, "")
printf "
%s
", $0
next
}
# Detect end of list
(list == 1) {
list = 0
printf "
", $0
next
}
# Detect link
/^=>/ {
sub(/^=>[ \t]*/, "")
url = $0
sub(/[ \t].*$/, "", url)
text = $0
sub(url, "", text)
sub(/[ \t]*$/, "", text)
sub(/^[ \t]*/, "", text)
# If linking to a Gemini page, change the extension from
# .gmi to .html
if ((url !~ /^[a-zA-Z]*:\/\//) && ((url ~ /\.gmi$/) || (url ~ /\.gemini$/))) {
sub(/\.gmi$/, ".html", url)
sub(/\.gemini$/, ".html", url)
}
# Show URL if no link text is provided
if (text == "") {
text = url
}
printf "