restic: init repository if needed, by default

Add backup/init config directive (defaults to yes) to control whether
the repository should be initialized if it doesn't exist. Since we need
to attempt to connect to the repository to verify if init is needed,
remove the testconnect parameter so that the handler just tests the
connection every time it runs.

examples/example.restic

@@ -86,12 +86,6 @@ password = secret
 ## Default:
 # ionicelevel =
 
-## Check if remote host is alive before attempting backup. Supports SFTP and REST
-## backends at the moment. Set to no to skip this test. [yes/no]
-##
-## Default:
-# testconnect = yes
-
 [s3]
 
 #aws_access_key_id =
@@ -134,6 +128,9 @@ password = secret
 
 [backup]
 
+# Initialize the repository if it doesn't exist [yes/no]
+#init = yes
+
 # Files adn directories to backup (can be specified multiple times) [path]
 #include = /
 

handlers/restic.in

@@ -8,7 +8,6 @@
 
 setsection general
 
-getconf testconnect yes
 getconf nicelevel
 getconf ionicelevel
 
@@ -205,24 +204,52 @@ fi
 
 ### TEST #######################################################################
 
-if [ "$testconnect" = "yes" ] || [ "$test" -eq 1 ]; then
+info "Attempting to connect to repository at ${repository}"
 
-  info "Attempting to connect to repository at ${repository}"
+cmd="restic snapshots"
+execstr="${cmd} ${cmd_global_options//$'\n'}"
 
-  cmd="restic snapshots"
+debug "executing restic snapshots"
+debug "$execstr"
+output=$($execstr 2>&1)
+ret=$?
+
+if [ $ret -eq 0 ]; then
+  debug $output
+  info "Connected successfully."
+else
+  setsection backup
+  getconf init yes
+  if [ "$init" = "yes" ]; then
+    debug $output
+    info "Unable to find a repository at ${repository}, will attempt to create one."
+    need_init="yes"
+  else
+    error $output
+    fatal "The specified repository is absent or unusable!"
+  fi
+fi
+
+### INIT #######################################################################
+
+if [ "$need_init" = "yes" ]; then
+
+  info "Initializing repository at $repository"
+
+  cmd="restic init"
   execstr="${cmd} ${cmd_global_options//$'\n'}"
 
-  debug "executing restic snapshots"
+  debug "executing restic init"
   debug "$execstr"
   output=$($execstr 2>&1)
   ret=$?
 
   if [ $ret -eq 0 ]; then
-    debug $output
-    info "Connected successfully."
+    warning $output
+    warning "Repository has been initialized."
   else
     error $output
-    fatal "The specified repository is absent or unusable!"
+    fatal "Unable to initialize repository, aborting!"
   fi
 
 fi