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|
#! /bin/bash
# Save incoming mail as comment
# Usage:
# echo '|<PATH_TO_THIS_SCRIPT>' >>~/.forward
mailto=${mailto:-$(whoami)@${HOSTNAME:?HOSTNAME is not specified}}
output_dir=${output_dir:-/srv/http}
# Check mail is for comment {{{
# Restore mail into variable
MAIL="$(tr -d '\r')"
header="$(<<<"$MAIL" sed '/^$/ q')"
body="$(<<<"$MAIL" sed -n '/^$/,$ p' | sed '1d')"
# determine mail is for comment by pattern
pattern='^Subject: .*comment on (https?://)?([^/]+)?/([^ ]+)$'
<<<"$header" grep -E "$pattern" >/dev/null || exit 0
# }}}
# Process header fields {{{
# enable execute last command in pipe under current shell
shopt -s lastpipe; set +m;
# save each field of header into variables
<<<"$header" grep '^[a-zA-Z]' \
| while read field value; do
declare field=$(<<<$field tr [:lower:] [:upper:] | tr '-' '_' | tr -d ':')
declare $field="${value}"
done
DATE=${DATE:+$(date --rfc-3339 seconds --date "$DATE")}
# }}}
# Get path of output file {{{
path=$(<<<"$header" sed -En "\\|${pattern}| {s//\\3/p; q}")
# sender want comment on some page, but find no path for this
if [ $path = "" ]; then
echo 'Cannot get target of comment from mail' >&2
exit 1
fi
# get output path
[[ "$path" =~ '/$' ]] && path+=index
path=${path#/}
path=${path/.html}
output=$output_dir/${path}.comment.html
# }}}
# Get comment from mail body {{{
# check mail includes multiple part
if [[ "$CONTENT_TYPE" =~ mixed ]]; then
boundary="$(<<<"$CONTENT_TYPE" sed -En 's/^.*boundary="(.*)".*$/\1/p')"
if [ $boundary = "" ]; then
echo 'cannot get boundary from mail header' >&2
exit 1
fi
# print content of first mail part
boundaryPat="\\|^--${boundary}\$|"
<<<"$body" sed -n "${boundaryPat},${boundaryPat} p" | sed -n "1,4d; ${boundaryPat} q; p" \
| read body
fi
# }}}
# Write comment to output file {{{
# add basic html layout for output file if necessary
if [ ! -f $output ] || ! xmllint --html --nofixup-base-uris $output &>/dev/null; then
echo -e '<ul>\n</ul>' >$output
fi
# get line of insert position by header field "In-Reply-To"
if [ -n "${IN_REPLY_TO}" ]; then
line=$(grep -n "^<!-- ${IN_REPLY_TO} -->$" $output | cut -d':' -f1)
fi
# insert comment into output file
<<-COMMENT sed -i "${line:-1}r /dev/stdin" $output
<li>
<time datetime="${DATE}">${DATE}</time>
<a href="mailto:${mailto}?subject=comment on ${path}&in-reply-to=${MESSAGE_ID}">[reply]</a>
$(<<<"${body}" markdown)
<ul>
<!-- ${MESSAGE_ID} -->
</ul>
</li>
COMMENT
# }}}
|
