1 files changed, 114 insertions, 0 deletions
diff --git a/roles/lists/files/usr/local/bin/mhonarc-scan.sh b/roles/lists/files/usr/local/bin/mhonarc-scan.sh
new file mode 100755
index 0000000..d0ea2af
--- /dev/null
+++ b/roles/lists/files/usr/local/bin/mhonarc-scan.sh
@@ -0,0 +1,114 @@
+#!/bin/sh
+
+# Convert a list archive into HTML.
+#
+# Copyright © 2014 Guilhem Moulin <guilhem@fripost.org>
+#
+# 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/>.
+
+set -ue
+
+fail () {
+    echo Error: "$@" >&2
+    exit 1
+}
+
+[ $# -eq 1 ] || { echo "Usage: $0 listdir"; exit; }
+listdir="${1%/}"
+[ -d "$listdir" ] || fail "No such directory: $listdir"
+
+localpart="${listdir##*/}"
+domainpart="${listdir%/$localpart}"
+domainpart="${domainpart##*/}"
+
+# Determine the rotation period
+rotation=
+[ -s "$listdir/control/archiverotate" ] && read rotation <"$listdir/control/archiverotate"
+
+# Subdir format (/!\ shouldn't be empty, and shouldn't contain spaces!),
+# and archive date format.
+case "${rotation:-month}" in
+    '')    subdirf='/'         listpage='./';        archivef=;;
+    year)  subdirf="%Y";       listpage='../';       archivef="for %Y";;
+    month) subdirf="%Y/%m";    listpage='../../';    archivef="for %B %Y";;
+    day)   subdirf="%Y/%m/%d"; listpage='../../../'; archivef="for %a, %d %b %Y";;
+    *)     fail "$rotation: unknown rotation period"
+esac
+
+# Look up for the send date in an email. Fall back to the creation date
+# if not found.
+printDate () {
+    local filename date
+    while read filename; do
+        if ! [ "$rotation" ]; then
+            # don't bother looking for a date
+            date=0
+        else
+            # stop as soon as the header is over
+            date=$(sed -nr '/^Date:\s*(\S.*)$/I {s//\1/p;q}; /^([^[:cntrl:][:space:]]+:|\s)/ !q' \
+                           "$filename")
+            [ "$date" ] || date=@$(stat -c '%Y' "$filename")
+        fi
+        echo $(date -d "$date" +"%s $subdirf") "$filename"
+    done
+}
+
+# Process a (single) subdirectory
+process () {
+    local list="$1" subdir="$2" date="$3"
+    [ -s "$list" ] || return 0
+
+    [ -d "$listdir/webarchive/$subdir" ] || mkdir -p "$listdir/webarchive/$subdir"
+    # TODO: add a line to the index file
+    xargs -a"$list" mhonarc -definevar ListName="'$localpart'" \
+                            -definevar ListPage="'${listpage}index.html'" \
+                            -definevar DirDate="'$date'" \
+                            -rcfile /etc/mhonarc.rc \
+                            -add \
+                            -quiet \
+                            -outdir "$listdir/webarchive/$subdir" \
+    || exit 1
+    # empty the list
+    echo -n >"$list"
+}
+
+# Process all found emails
+processM () {
+    local cursubdir= date=
+    local timestamp subdir filename
+
+    while read timestamp subdir filename; do
+        if [ "$cursubdir" != "$subdir" ]; then
+            process "$list" "$cursubdir" "$date"
+            cursubdir="$subdir"
+            date="$(date -d "@$timestamp" +"$archivef")"
+        fi
+        echo "$filename" >>"$list"
+    done
+    process "$list" "$cursubdir" "$date"
+}
+
+# The span of emails we'll touch during the current instance
+now=$(date +'%s')
+list=$(mktemp) || exit 1
+trap 'rm -f "$list"' EXIT
+
+from=0
+if [ -s "$listdir/.webarchive.date" ]; then
+    read from <"$listdir/.webarchive.date"
+    from=$(( $from - 30 )) # remove 30s to fight race conditions
+fi
+
+find "$listdir/archive/" -type f -a -newermt @"$from" | printDate | sort -n -k1,1 | processM
+echo "$now" > "$listdir/.webarchive.date"