From bf5f85068d8614f97e190e5115e34f5442ba7924 Mon Sep 17 00:00:00 2001
From: Joachim Desroches <joachim.desroches@epfl.ch>
Date: Fri, 7 Aug 2020 10:39:38 +0200
Subject: [PATCH] Add a type to create a borg repository.

---
 type/__borg_repo/gencode-remote               | 36 ++++++++++++++++
 type/__borg_repo/man.rst                      | 43 +++++++++++++++++++
 type/__borg_repo/manifest                     | 14 ++++++
 type/__borg_repo/parameter/boolean            |  1 +
 type/__borg_repo/parameter/default/encryption |  1 +
 type/__borg_repo/parameter/optional           |  1 +
 type/__borg_repo/parameter/required           |  1 +
 7 files changed, 97 insertions(+)
 create mode 100644 type/__borg_repo/gencode-remote
 create mode 100644 type/__borg_repo/man.rst
 create mode 100644 type/__borg_repo/manifest
 create mode 100644 type/__borg_repo/parameter/boolean
 create mode 100644 type/__borg_repo/parameter/default/encryption
 create mode 100644 type/__borg_repo/parameter/optional
 create mode 100644 type/__borg_repo/parameter/required

diff --git a/type/__borg_repo/gencode-remote b/type/__borg_repo/gencode-remote
new file mode 100644
index 0000000..542bf5f
--- /dev/null
+++ b/type/__borg_repo/gencode-remote
@@ -0,0 +1,36 @@
+#!/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
+
diff --git a/type/__borg_repo/man.rst b/type/__borg_repo/man.rst
new file mode 100644
index 0000000..38ab0c9
--- /dev/null
+++ b/type/__borg_repo/man.rst
@@ -0,0 +1,43 @@
+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.
diff --git a/type/__borg_repo/manifest b/type/__borg_repo/manifest
new file mode 100644
index 0000000..fe18c9c
--- /dev/null
+++ b/type/__borg_repo/manifest
@@ -0,0 +1,14 @@
+#!/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"
diff --git a/type/__borg_repo/parameter/boolean b/type/__borg_repo/parameter/boolean
new file mode 100644
index 0000000..f8ee7c6
--- /dev/null
+++ b/type/__borg_repo/parameter/boolean
@@ -0,0 +1 @@
+append-only
diff --git a/type/__borg_repo/parameter/default/encryption b/type/__borg_repo/parameter/default/encryption
new file mode 100644
index 0000000..621e94f
--- /dev/null
+++ b/type/__borg_repo/parameter/default/encryption
@@ -0,0 +1 @@
+none
diff --git a/type/__borg_repo/parameter/optional b/type/__borg_repo/parameter/optional
new file mode 100644
index 0000000..f63b25b
--- /dev/null
+++ b/type/__borg_repo/parameter/optional
@@ -0,0 +1 @@
+passphrase
diff --git a/type/__borg_repo/parameter/required b/type/__borg_repo/parameter/required
new file mode 100644
index 0000000..a5465f8
--- /dev/null
+++ b/type/__borg_repo/parameter/required
@@ -0,0 +1 @@
+encryption