From f14046610ea74d411eee1288169235548b27835c Mon Sep 17 00:00:00 2001
From: Valentin Lab <valentin.lab@kalysto.org>
Date: Thu, 15 Nov 2018 16:37:35 +0100
Subject: [PATCH] new: [letsencrypt] support for scheduling relation.

---
 .../hooks/schedule_command-relation-joined    | 35 +++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100755 letsencrypt/hooks/schedule_command-relation-joined

diff --git a/letsencrypt/hooks/schedule_command-relation-joined b/letsencrypt/hooks/schedule_command-relation-joined
new file mode 100755
index 0000000..e2fb7b1
--- /dev/null
+++ b/letsencrypt/hooks/schedule_command-relation-joined
@@ -0,0 +1,35 @@
+#!/bin/bash
+
+## When writing relation script, remember:
+##  - they should be idempotents
+##  - they can be launched while the dockers is already up
+##  - they are launched from the host
+##  - the target of the link is launched first, and get a chance to ``relation-set``
+##  - both side of the scripts get to use ``relation-get``.
+
+set -e
+
+label=${SERVICE_NAME}-renew
+DST=$CONFIGSTORE/$TARGET_SERVICE_NAME/etc/cron/$label
+LOCAL_LOG=/var/log/cron/${label}_script.log
+schedule=$(relation-get schedule)
+
+if ! echo "$schedule" | egrep '^\s*(([0-9/,*-]+\s+){4,4}[0-9/,*-]+|@[a-z]+)\s*$' >/dev/null 2>&1; then
+    err "Unrecognized schedule '$schedule'."
+    exit 1
+fi
+
+## Warning: using '\' in heredoc will be removed in the final cron file, which
+##   is totally wanted: cron does not support multilines.
+
+## Warning: 'docker -v' will use HOST directory even if launched from
+##   'cron' container.
+file_put "$DST" <<EOF
+$schedule     root  lock $label -D -p 10 -c "\
+    docker run --rm \
+        -v $BASE_CHARM_PATH/etc/letsencrypt:/etc/letsencrypt:rw \
+        -v $BASE_CHARM_PATH/var/log/letsencrypt:/var/log/letsencrypt:rw \
+        -v $BASE_CHARM_PATH/var/lib/tldextract:/var/lib/tldextract:rw \
+        \"$DOCKER_BASE_IMAGE\" crt renew" 2>&1 | ts '\%F \%T \%Z' >> $LOCAL_LOG
+EOF
+chmod +x "$DST"