add restic wrapper scripts

roles/restic/templates/env.sh.j2

@@ -1,6 +0,0 @@
-#!/bin/bash
-
-export RESTIC_REPOSITORY="{{ item.repo }}"
-{% for k, v in item.environment.items() %}
-export {{ k | upper }}="{{ v }}"
-{% endfor %}

roles/restic/templates/exclude.txt.j2

@@ -1,3 +1,15 @@
+# {{ ansible_managed }}
+
+{% if restic_global_exclude is defined %}
+# global exclusions
+{% for exclude in restic_global_exclude | default([]) %}
+{{ exclude }}
+{% endfor %}
+{% endif %}
+
+{% if item.exclude is defined %}
+# job exclusions
 {% for exclude in item.exclude %}
 {{ exclude }}
 {% endfor %}
+{%- endif -%}

roles/restic/templates/job-env.sh.j2

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+# {{ ansible_managed }}
+
+REPO="{{ item.repo }}"
+PATHS="{{ item.paths | join(' ') }}"

roles/restic/templates/repo-env.sh.j2

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+# {{ ansible_managed }}
+
+export RESTIC_REPOSITORY="{{ item.repo }}"
+{% if "environment" in item %}
+{% for k, v in item.environment.items() %}
+export {{ k | upper }}="{{ v }}"
+{% endfor %}
+{% endif %}
+
+{% if "forget" in item %}
+{% for k, v in item.forget.items() %}
+{{ k | upper }}="{{ v }}"
+{% endfor %}
+{% endif %}

roles/restic/templates/restic-job.sh.j2

@@ -0,0 +1,50 @@
+#!/bin/bash
+
+# {{ ansible_managed }}
+
+error_exit() {
+    printf "%s\n" "$1"
+    exit 1
+}
+
+NICE="ionice -c2 nice -n19"
+JOB=$1
+
+if [ -z "$JOB" ]; then
+    error_exit "job is missing"
+fi
+
+RESTIC_ETC_PATH="{{ restic_etc_path }}"
+JOB_PATH="${RESTIC_ETC_PATH}/jobs/${JOB}"
+JOB_ENV="${JOB_PATH}/env.sh"
+
+if [ ! -r "$JOB_ENV" ]; then
+    error_exit "${JOB_ENV} does not exist"
+fi
+
+. "$JOB_ENV"
+
+if [ -z "${REPO+x}" ]; then
+    error_exit "\$REPO is not set"
+fi
+
+REPO_PATH="${RESTIC_ETC_PATH}/repos/${REPO}"
+REPO_ENV="${REPO_PATH}/env.sh"
+
+if [ ! -r "$REPO_ENV" ]; then
+    error_exit "${REPO_ENV} does not exist"
+fi
+
+. "$REPO_ENV"
+
+EXCLUDE_PATH="${JOB_PATH}/exclude.txt"
+
+if [ -z "${PATHS+x}" ]; then
+    error_exit "\$PATHS is not set"
+fi
+
+if [ -r "$EXCLUDE_PATH" ]; then
+    $NICE {{ restic_path }} backup -q --exclude-file="${EXCLUDE_PATH}" "${PATHS}"
+else
+    $NICE {{ restic_path }} backup -q "${PATHS}"
+fi

roles/restic/templates/restic-tidy.sh.j2

@@ -0,0 +1,59 @@
+#!/bin/bash
+
+# {{ ansible_managed }}
+
+error_exit() {
+    printf "%s\n" "$1"
+    exit 1
+}
+
+MAX_ATTEMPTS=60
+REPO=$1
+
+if [ -z "$REPO" ]; then
+    error_exit "repo is missing"
+fi
+
+RESTIC_ETC_PATH="{{ restic_etc_path }}"
+REPO_PATH="${RESTIC_ETC_PATH}/repos/${REPO}"
+REPO_ENV="${REPO_PATH}/env.sh"
+
+if [ ! -r "$REPO_ENV" ]; then
+    error_exit "${REPO_ENV} does not exist"
+fi
+
+. "$REPO_ENV"
+
+KEEP_DAILY=${KEEP_DAILY:-7}
+KEEP_WEEKLY=${KEEP_WEEKLY:-5}
+KEEP_MONTHLY=${KEEP_MONTHLY:-12}
+KEEP_YEARLY=${KEEP_YEARLY:-10}
+
+counter=0
+sleep=1
+rc=1
+
+until [ $counter -eq $MAX_ATTEMPTS ] || [ $rc -eq 0 ]; do
+  {{ restic_path }} forget \
+      --quiet \
+      --host $(hostname -f) \
+      --keep-daily "$KEEP_DAILY" \
+      --keep-weekly "$KEEP_WEEKLY" \
+      --keep-monthly "$KEEP_MONTHLY" \
+      --keep-yearly "$KEEP_YEARLY" \
+      --prune
+
+  rc=$?
+
+  if [ $rc -ne 0 ]; then
+    sleep=$((counter * 5))
+    printf "sleeping for %d seconds (%d)\n" $sleep $counter
+    sleep $sleep
+  fi
+
+  let counter+=1
+done
+
+if [ $rc -ne 0 ] && [ $counter -eq $MAX_ATTEMPTS ]; then
+  printf "tidy timed out, exiting\n"
+fi