#!/bin/bash
#
# Preview a MakeStuff blog post, an HTML body with an email-like
# header, by converting it to an HTML page on STDOUT. The subject
# becomes the contents of the and <h1> tags. The rest of the
# header information is put at the end of the body text.
MARKDOWN='kramdown -i GFM --no-hard-wrap'
usage () {
cat <<EOF
Usage: $0 [options] file
options:
-h | --help
-t --headers[=top]
-b --headers=bottom
-y --headers=yaml suppresses HTML head and body tags
EOF
}
while true; do
case "$1" in
-h|--help) usage; exit 0 ;;
-t|--headers|--headers=top) headers=top; shift ;;
-b|--headers=bottom) headers=bottom; shift ;;
-y|--headers=yaml) headers=yaml; shift ;;
*.md) FILTER="$MARKDOWN"; break ;;
*.html) FILTER=cat; break ;;
-*) echo unrecognized option "$1"
usage
exit 1
;;
*) echo unrecognized file type "$1"
usage
exit 1
;;
esac
done
shopt -s extglob # Required to trim whitespace; see below
read_headers () {
while IFS=':' read key value; do
# trim whitespace in "value"
value=${value##+([[:space:]])}; value=${value%%+([[:space:]])}
[ -z "$key" ] && break # the separator line between headers and body
case "$key" in
[sS]ubject|[tT]itle) Subject="$value"
;;
[mM]usic) Music="$value"
;;
[tT]ags) Tags="${value//[\[\]]/}" # remove brackets from tag list
;;
[Mm]ood) Mood="$value"
;;
[Pp]icture) Picture="$value"
;;
[Ll]ocation) Location="$value"
;;
[Aa]ccess) Permission="$value"
;;
[Pp]ermission) Permission="$value"
;;
[Jj]ournal) Journal="$value" # Journal to post to instead of default
;;
[Cc]rosspost) Xpost="$value" # Journal to post to *in addition to* default
;;
---)
[ ! -z $yaml_started ] && break;
yaml_started=1
;;
"--text follows this line--") break # Handle emacs's separator
;;
esac
done
}
print_headers () {
echo "<table>"
for field in Mood Location Music Permission Picture Subject Tags; do
[ -z "${!field}" ] || \
echo -e " <tr><th>$field:</th><td>${!field}</td><tr>"
done
echo "</table>"
echo
}
print_yaml_headers () {
echo "---"
for field in Mood Location Music Permission Picture Subject Tags; do
[ -z "${!field}" ] || \
echo -e "$field: ${!field}"
done
echo "---"
echo
}
{
read_headers
if [ ! "$headers" = yaml ]; then
echo "<html><head>"
echo " <title>$Subject"
echo ""
echo "$Subject
"
echo
fi
[ "$headers" = top ] && print_headers
[ "$headers" = yaml ] && print_yaml_headers
$FILTER
[ "$headers" = bottom ] && print_headers
} < "${1:-/dev/stdin}"
[ "$headers" = yaml ] || echo "