#!/bin/sed -Ef
# gmi2html: Sed script to convert text/gemini to html.
# Based on v0.14.2 of the gemini spec.
#
# This script is dedicated to the public domain according to the terms of CC0:
# https://creativecommons.org/publicdomain/zero/1.0/
# TODO: add meta charset header, I suppose, to ensure utf8?
s/\&/\&/g
s/"/\"/g
s//! s/>/\>/g
/^=?>/ {
:loop
s/^((=?>).*)>/\1\>/
t loop
}
1 {
i\
\
h
s/^#\s*//
t title_set
s/.*/Untitled/
:title_set
s/.*/&<\/title><\/head>/
p
i\
<body>
s/.*//
x
}
x
/^```/ {
x
/^```/ {
s/.*/<\/pre>/
h
}
b end
}
/^(\*|=>) / {
x
/^(\*|=>) / {
s/^\* (.*)/<li>\1<\/li>/
s/^=>\s*([^[:space:]]+)\s*$/<li><a href="\1">\1<\/a><\/li>/
s/^=>\s*([^[:space:]]+)\s+(.+)/<li><a href="\1">\2<\/a><\/li>/
b end
}
i\
</ul>
h
}
g
t linetypes
:linetypes
s/^```.*/<pre>/
s/^\* (.*)/<ul><li>\1<\/li>/
s/^=>\s*([^[:space:]]+)\s*$/<ul><li><a href="\1">\1<\/a><\/li>/
s/^=>\s*([^[:space:]]+)\s+(.+)/<ul><li><a href="\1">\2<\/a><\/li>/
s/^###\s*(.*)/<h3>\1<\/h3>/
s/^##\s*(.*)/<h2>\1<\/h2>/
s/^#\s*(.*)/<h1>\1<\/h1>/
s/^>\s*(.*)/<blockquote>\1<\/blockquote>/
t end
s/.+/<p>&<\/p>/
:end
$ {
x
/^```/ a\
</pre>
/^(\*|=>) / a\
</ul>
x
a\
</body>\
</html>
}