Add a type to create a borg repository.

type/__borg_repo/gencode-remote

+#!/bin/sh
+
+passphrase=
+appendonly=
+
+case "$(cat "${__object:?}/parameter/encryption")" in
+	none)
+		enc=none
+		;;
+	repokey)
+		enc=repokey
+		if [ -f "${__object:?}/parameter/passphrase" ];
+		then
+			passphrase="$(cat "${__object:?}/parameter/passphrase")"
+		else
+			echo "__borg_repo cannot use repokey encryption with no passphrase. Aborting." >&2;
+			exit 1;
+		fi
+		;;
+	*)
+		echo "$enc is not a known encryption mode for __borg_repo. Aborting." >&2
+		exit 1;
+esac
+
+if [ -f "${__object:?}/parameter/append-only" ];
+then
+	appendonly='--append-only'
+fi
+
+cat <<- EOF
+	if ! borg check --repository-only 1>&2 2>/dev/null "/${__object_id:?}";
+	then
+		BORG_NEW_PASSPHRASE=$passphrase borg init -e ${enc:?} $appendonly /${__object_id:?}
+	fi
+EOF
+

type/__borg_repo/man.rst

+cdist-type__borg_repo(7)
+========================
+
+NAME
+----
+cdist-type__borg_repo - Configure a borg repository on host
+
+
+DESCRIPTION
+-----------
+
+Initializes a borg repository at the location specified in the
+`${__object_id}`. Nothing is done if the repository already exists.
+
+Currently, only `none` and `repokey` are supported as encryption modes;
+`repokey` requires the `passphrase` argument to be given. The default is
+`none`.
+
+REQUIRED PARAMETERS
+-------------------
+encryption
+  The encryption to use.
+
+OPTIONAL PARAMETERS
+-------------------
+passphrase
+  The passphrase to encrypt the keyfile with.
+
+BOOLEAN PARAMETERS
+------------------
+append-only
+  If the repository is append-only
+
+AUTHORS
+-------
+Joachim Desroches <joachim.desroches@epfl.ch>
+
+COPYING
+-------
+Copyright \(C) 2020 Joachim Desroches. 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.

type/__borg_repo/manifest

+#!/bin/sh
+
+os="$(cat "${__global:?}"/explorer/os)"
+
+case "$os" in
+	"alpine")
+		borg_package=borgbackup
+		;;
+	*)
+		echo "__borg_repo is not yet implemented for os $os. Aborting." >&2;
+		exit 1;
+esac
+
+__package "$borg_package"

type/__borg_repo/parameter/boolean

+append-only

type/__borg_repo/parameter/default/encryption

+none

type/__borg_repo/parameter/optional

+passphrase

type/__borg_repo/parameter/required

+encryption