#!/bin/sh
# copies an .html file to an equivalent .xhtml file, but replaces
# the meta charset with an XML declaration for compatibility with some
# XML tooling.
# Expects polygot XHTML(5) markup.
# Formats both the .html and .xhtml file.
# this means that every index.html file has an equivalent index.xhtml file.
# content negotiation allows an agent to pick html or xhtml.
# use xmllint to do the formatting.
# xmllint ruins inline CSS so delete the inline CSS and re-insert it.
# xmllint also adds extra whitespace around which we remove
# with "sd". I chose sd since it handles newlines well.
set -e -u
export html_file="$1"
export tmp_file="${html_file}.tmp"
export xhtml_file=${html_file%*.html}.xhtml
cleanup() {
rm -f "$tmp_file"
}
trap cleanup EXIT
trap cleanup EXIT
sed 7d "$html_file" | xmllint --format --encode UTF-8 --noent - -o "$tmp_file"
head -n7 "$tmp_file" >> "$xhtml_file"
cat tmp.css >>"$xhtml_file"
tail -n +8 "$tmp_file" \
| sd '\n\t*\n\t*
' '
' >>"$xhtml_file"
tail -n +2 "$xhtml_file" > "$html_file"
sed -i 5d "$xhtml_file" # busybox sed supports "-i"
# the "sed 5d" deletes the now-redundant meta charset; it's the first
# thing in the .