renamed snapshot to backup

auto-backup/Dockerfile

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+ARG BUILD_FROM
+FROM $BUILD_FROM
+
+ENV LANG C.UTF-8
+
+# Copy scripts for add-on
+COPY run.sh /
+COPY backup.sh /
+
+RUN apk add -U jq bc curl  && \
+  chmod a+x /run.sh && \
+  chmod a+x /backup.sh
+
+CMD [ "/run.sh" ]

auto-backup/README.md

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+## Auto Backup
+
+This plugins takes a backup of your hassio instance based on the timing you specify in config. Just use standard cron format (min hour day month weekday).
+You can specify how many backups you want to mantain (should be >= 1). Note that backups are deleted after a new one is taken, so if something goes wrong, you end up with no recent backup and the oldest valid ones.

auto-backup/backup.sh

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+#!/bin/sh
+
+echo
+echo "Taking a new backup"
+
+CONFIG_PATH=/data/options.json
+NUM_BACKUPS=$(jq --raw-output ".num_backups" $CONFIG_PATH)
+if [ $NUM_BACKUPS -lt 1 ] ; then
+    NUM_BACKUPS=1
+fi
+
+# retrieve current backup list
+CURRENT_BACKUPS=$( curl -s -H "X-HASSIO-KEY: $HASSIO_TOKEN" http://hassio/backups )
+STATUS=$(echo "$CURRENT_BACKUPS" | jq --raw-output '.result')
+if [ ! "$STATUS" = "ok" ] ; then
+    echo "ERROR: Can't retrieve current backup list."
+    exit 1
+fi
+
+
+# take backup (this can take a long time)
+START_TIMESTAMP=$(date "+%s")
+RESULT=$( curl -s -H "X-HASSIO-KEY: $HASSIO_TOKEN" --data '{"name":"Automatic Backup"}' -X POST http://hassio/backups/new/full )
+BACKUP_TIMESTAMP=$(date "+%s")
+BACKUP_TIME=$(echo "$BACKUP_TIMESTAMP - $START_TIMESTAMP" | bc)
+
+# check if backup is ok
+STATUS=$(echo "$RESULT" | jq --raw-output '.result')
+if [ ! "$STATUS" = "ok" ] ; then
+    echo "Backup FAILED after $BACKUP_TIME seconds."
+    exit 1
+fi
+
+SLUG=$(echo "$RESULT" | jq --raw-output '.data.slug')
+echo "Backup $SLUG taken SUCCESSFULLY in $BACKUP_TIME seconds."
+
+# housekeeping:
+# we take the list of backups (which was taken before this backup)
+# we sort by date (reversed), remove the protected backups and take
+# only a list of slugs
+# then we skip the first NUM_BACKUPS slugs and delete all the rest
+FIRST_SLUG_TO_DELETE=$(echo "1 + $NUM_BACKUPS" | bc)
+echo $CURRENT_BACKUPS | jq --raw-output ".data.backups | sort_by(.date) | reverse[] | select(.slug != \"$SLUG\") | select (.protected==false) | .slug " | tail -n +$FIRST_SLUG_TO_DELETE | while read SLUG_TO_DELETE
+  do
+    echo "Removing backup $SLUG_TO_DELETE"
+    curl -s -H "X-HASSIO-KEY: $HASSIO_TOKEN"  -X POST http://hassio/backups/$SLUG_TO_DELETE/remove
+  done

auto-backup/config.json

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+{
+    "name": "Auto Backup",
+    "url": "https://git.asperti.com/paspo/hassio-addons",
+    "version": "0.1.2",
+    "slug": "auto-backup",
+    "description": "Take hassio backups with fixed timings and manage retention",
+    "startup": "before",
+    "boot": "auto",
+    "arch": [
+        "aarch64",
+        "amd64",
+        "armhf",
+        "i386"
+    ],
+    "homeassistant": "2021.9",
+    "hassio_api": true,
+    "hassio_role": "backup",
+    "options": {
+        "cron": "15 3 * * *",
+        "num_backups": 10
+    },
+    "schema": {
+        "cron": "str",
+        "num_backups": "int"
+    }
+}

auto-backup/run.sh

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+#!/bin/bash
+set -e
+
+CONFIG_PATH=/data/options.json
+
+CRON=$(jq --raw-output ".cron" $CONFIG_PATH)
+
+echo "$CRON /backup.sh >> /var/log/cron.log" > /var/spool/cron/crontabs/root
+
+# change perms
+chmod 600 /var/spool/cron/crontabs/root
+
+echo "Auto backup ready."
+crond 
+touch /var/log/cron.log
+tail -f /var/log/cron.log