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repo2html/processor

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#!/bin/bash
#
# Generates HTML from repository commit messages
#
# Copyright (C) 2012 Mike Gerwitz
#
# This file is part of repo2html.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# #
declare -xr repotype="${1?Missing repository type}"
declare -xr path_out="${2?Missing output path}"
# provide default message formatter if necessary
msgfmt="${msgfmt:-./msgfmt}"
source include/tpl "$path_tpl"
# generates output filename
outfgen()
{
ts="${1?Missing timestamp}"
id="${2?Missing commit id}"
ext="${3:+.$3}"
dateout="$( ./tsdate "$ts" %Y-%m-%d )"
month="$( ./tsdate "$ts" %m )"
year="${dateout%%-*}"
echo "$year/$month/$id$ext"
}
# performs index generation; by separating this into a procedure, we allow the
# template to invoke it at any point and further process the output
do-index()
{
# commands to invoke to output heading, index lines and index footers
# (intended to close headings)
headout="$1"
lineout="$2"
footout="$3"
prevdate=
lastts=
firstyear=0
lastyear=0
lasthash=
# generate index
while read hash commit ts id subject; do
# ignore commits that begin with ':'
[[ "$subject" == :* ]] && {
echo "Ignoring $commit: $subject" >&2
continue
}
echo "Found $commit: $subject" >&2
dateout="$( ./tsdate "$ts" %Y-%m-%d )"
dategroup="${dateout%-*}"
day="${dateout##*-}"
month="$( ./tsdate "$ts" %m )"
year="${dateout%%-*}"
# commits are ordered by date desc
lasthash="${lasthash:-$hash}"
lastts="${lastts:-$ts}"
lastyear="${lastyear:-$year}"
firstyear="$year"
pagefile="$( outfgen "$ts" "$id" "$html_ext" )"
fmtsubject="$( "$msgfmt" -P < <( echo "$subject"; echo ) )"
[ "$prevdate" == "$dategroup" ] || {
[ -z "$prevdate" ] || $footout
$headout "$dategroup"
}
$lineout "$day" "$pagefile" "$fmtsubject"
prevdate="$dategroup"
# create the containing directory (if it does not yet exist and then
# generate the commit page
mkdir -p "$( dirname "$path_out/$pagefile" )" \
&& (
# make the majority of the data available as environment variables (for
# convenience), lowercase so as not to be conflict with conventional
# environment variables
export hash commit id subject="$fmtsubject" timestamp="$ts"
export dategroup month day year
# invoke template
"$repotype"/commit2html "$commit" | apply-template commit
) > "$path_out/$pagefile" \
&& ./hashcache "$hash" "$pagefile" "$subject"
done
$footout
yearrange="$firstyear"
if [ "$lastyear" -gt "$firstyear" ]; then
yearrange="$firstyear&ndash;$lastyear"
fi
}
# let the template finish
export -f do-index outfgen
exec-template index